TW200416329A - Steel wall and the manufacture method thereof - Google Patents

Abstract

This invention connects steel with steel sheet pile joint to make steel wall of high water proofing by joint auto-welding with working space to improve construction of workability, efficiency, and low cost. The manufacture method of this invention includes the steps of: embedding joint 2 and 3 of a steel element to joint 2 and 3 of another steel element to make a steel wall A; punching holes on sides of the steel wall A; assembling the steel wall A into a dual-wall structure of a close space able for removal of inside earth sand and water and auto-welding; cleaning joints of the steel wall A and automatically weld the joints seamlessly longitudinally to make a steel wall of high water proofing efficiently. The cross sections of the joint 2 and 3 on both ends of the steel sheet pile are dissymmetrical. A dissymmetrical U-shaped steel sheet pile 1 is applied to connect several steel sheet piles straightway when the cross sections of the steel sheet piles align towards the same direction to promote efficiency and economy of the construction. (Diagram 9: Steel wall and the manufacture method thereof)

Description

200416329 (1) 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to a steel wall suitable for a water-repellent place suitable for a waste disposal site, an underground wall of a building, a road retaining wall, and the like, and a manufacturing method thereof . [Prior technology] Steel sheet piles are often used as retaining walls for the construction of underground structures or in harbors and waters. The reason is that the highly rigid wall body made of high-quality materials made of steel can be constructed in a relatively short construction period and has excellent water-shielding properties. Although the steel itself of the steel sheet rod body does not pass water at all, the gap existing in the joint part in the fitting state will pass through the water, so the gap in the joint part will deeply affect the water-shielding property of the steel sheet pile.

Generally, “the joint part is formed after the subsequent joint is made, and water is relatively easy to pass through.” However, as time passes, water particles gradually block the soil particles inside the joint as water flows. In the case where the internal gaps are clogged up unexpectedly, or in order to improve the water-shielding property, it is necessary to reduce the internal gaps in this joint. However, if the gap is reduced, the punching resistance of the joint part will increase. The water-shielding property and workability are contrary to the required performance, and it is not possible to blindly reduce or increase the gap of the joint part. How to improve the water-shielding property of the joint part One of the topics. For example, 'the case of steel walls used in water-shielding methods such as the conventional waste disposal site', before the steel sheet pile is punched, apply a predetermined amount of swellable waterstop-5- (2) (2) 200416329 After the flushing, the water-blocking material will be swelled by seawater or the like. In addition, Japanese Laid-Open Patent Publication No. 200 1-026925 (Patent Document 1) "waterstop wall" is disclosed, and as shown in Figs. 4 and 5, a plurality of U-shaped joints 62 of the steel sheet pile 6 1 are integrally formed by welding. The waterstop wall structure 63 is formed by connecting a plurality of waterstop wall structures 63 ′ to each other while fitting the joints 64 on the side edges to the ground, and adjoining the waterstop wall structures 63 adjacent to each other. Site improvement 65 is applied around the joints 64 of each other. In addition, in Japanese Laid-Open Patent Publication No. 07_3 243 29 (Patent Document 2), "a method for constructing a water stop wall generated by a column of steel pipe columns" is disclosed. As shown in Figs. One female joint material 73 of the joint is provided with an outwardly extending leg portion 7 5 a on one of the pair of wing portions 74 and 75, and a large number of this steel pipe sheet pile 7 1 are provided, and a male joint material 7 2 and the female joint material 7 3 are fitted and connected to each other to form a steel pipe sheet pile wall, and then excavate the site on the sheet side of the construction side of the building to expose the joint portion, and the front end of the leg portion 7 5 a of the female joint material 7 3 A method of water-tightly fixing the outer surface of the steel pipe body of the other steel pipe sheet pile 71 by welding 76. Other known technologies, such as Japanese Patent Laid-Open Gazette 01-1 68766, Japanese Patent Laid-Open Gazette 2000-1 92446, Japanese Patent Laid-Open Gazette 2000-192451, Japanese Patent Laid-Open Gazette 2000-073361, Japanese Patent Laid-Open Gazette 2000-23 43 3 0, Japanese Patent Publication Gazette 200 1 -2 1 443 5, Japanese Patent Publication Gazette 200 1 -248 1 52, Japanese Patent Publication Gazette 2002-146772. -6-(3) (3) 200416329 [Summary of the invention] (Problem to be solved by the present invention) The construction of k inch on the steel wall made of steel sheet roll temple is a method using a swellable water-proof material, and its swellability In the case where the environmental safety or durability of the water stopper itself is long and the period from the application or installation of the steel sheet pile to the punching of the steel sheet pile is long, the water stopper may be exposed to rain, dew, moisture, etc. Swelling requires labor and time for the punching of steel sheet piles, etc. During the punching of steel sheet piles, the water-stopping material will peel off, carbonize due to heat, etc., and it is necessary to confirm the water-tightness of the formed water-shielding wall. At this time, it is necessary to check whether water will flow out of the water blocking wall from the side of the waste disposal site. For the part where the water stop is insufficient, in order to ensure the water stop, it is necessary to improve the site around the leaking part. The salary will be increased. , The uneasiness that division can leak out. Moreover, in the case of U-shaped steel sheet piles, it is because the waterproofing material is located on the cross-section neutral axis of the continuous steel wall. Therefore, during the construction, the external force of the wave will generate a shearing force on the waterproofing material, which will cause the waterproofing material. damaged. In addition, in the invention disclosed in Japanese Laid-Open Patent Publication No. 2 0 1-0 2 6 9 2 5 (Patent Document 1), it is necessary to match the weight of the integrated water wall structure 63 and select a heavy machine or a jig. It is also necessary to ensure the water-proofing of the site improvement 65 near the joint 64 of the water-stop wall structure 63 and the environmental safety of the material used for the site improvement 65. On the one hand, in the invention disclosed in Japanese Patent Publication No. 07-3 243 29 (Patent Document 2), although welding is used for the joint part, it is -7- (4) 200416329 for the water-stopping of the building. As the water stop of the groundwater at the site, the water stop of the waste disposal site and the like are different. The degree of water stop is only the degree of drainage installed on the side of the normal building, which is higher than the intention of the present case. The functions of the water barrier and the safety device are different. Moreover, in the invention disclosed in Japanese Laid-Open Patent Publication No. 07-324329 (Patent Document, because a special-shaped female connector material is used, the female connector material 73 is deformed during punching, and it is moistened when water in the construction site is excavated. The vertical accuracy of the exposed joints in the state or in the water state is suspected. In addition, the splicer cannot be used in these methods. The invention of the present invention aims to solve the above-mentioned problems of the conventional technology. Space for automatic welding of joints, without loss of workability, and a method for manufacturing high-water-shielding steel made efficiently and inexpensively. (Means for solving the problem) The first scope of the patent application scope of the present invention, It is a method of making a steel wall. A method of manufacturing steel that connects a plurality of steel materials having joints at both ends to each other, characterized in that the steel material is formed by punching the joints to form part or all of the steel wall. At the same time, the temporary steel is set on the side of the steel wall to form a temporary steel wall, and the soil and sand in the area held by the front wall and the temporary steel wall are removed. After the joint part of the aforementioned wall is washed, the joint part is automatically welded. Steel materials having joints for steel walls, such as nets and the two pairs of matching mating institutes 2) 73, are welded underground to cause damage to the wall. And manufacture of wall-forming fittings, steel and steel side fittings, -8- (5) (5) 200416329 flanged U-shaped steel sheet piles, linear steel sheet piles, steel pipe sheet piles, those who combine these and shaped steel, etc. It is not particularly limited. The temporary steel materials, such as the aforementioned U-shaped steel sheet piles, linear steel sheet piles, steel pipe sheet piles, and combinations of these shaped steels, are not particularly limited, and the steel materials constituting the steel wall body and the temporary steel materials may have different forms. The purpose of using temporary steel is to form a space that can be welded automatically. This temporary steel can be reused during or after construction. In addition, the temporary steel wall formed by the temporary steel is not limited to the case where a plurality of temporary steels are formed, and it may be formed by a single temporary steel. The joints are cleaned to make welding possible, and to further ensure the quality of welding, high-pressure spraying of water or air is effective. The automatic welding of the joint portion, for example, the mounting of a guide for automatic welding to a steel sheet pile by a magnet can be performed by a conventional method. In the present invention, the welding speed of the required length of the plate thickness welding portion can be ensured. For example, when MAG welding using C02 gas as the sealing gas is around 10 to 20 cm / minute, it can be doubled in plasma welding. Welding with almost the same quality over a long period of time can be achieved with simple settings. Therefore, compared with the welding operation of the welder, the welding can be performed homogeneously and with good efficiency. When used in the waste disposal field of steel sheet piles, the longer the welding extension is, the more the welding cost can be reduced. In places other than the joint part of the steel wall, the steel wall and the temporary steel wall are almost in good contact, due to the size of the automatic welding machine, the specifications of the punching machine for steel with joints such as steel sheet piles, etc. You can keep these away as needed. -9- (6) 200416329 However, regarding the performance of the welding part of the joint, a steel sheet pile with an asymmetric joint that is wet in advance is used, and the welding interval and speed of the welding part are changed to try automatic welding of the joint part, and the welding part is cut Break measurement to review the results of welded plates & and valley joints' It has been confirmed that even if the joint is in a wet state, sufficient welded plate thickness and welded joints can be obtained by automatic welding.

According to the present invention, for the environmental safety of the material surface, and the working space or rest space required for the welding of the welder, the welding itself is vertical welding (horizontal welding), which is difficult to weld in the downward direction, and the welding is performed by automatic welding. It has been confirmed that welding of steel joints is possible even in a wet state, and it can be applied to construction workers.

In other words, if the area surrounding the joint part to be welded is formed by steel materials according to the present invention, the groundwater is removed from the joint part or the steel wall and the temporary steel wall when the soil and sand in the area are controlled and removed. If the contact surface (non-direct contact, but also soil and sand can be used), the water stoppage by the automatic welding joint part is possible, and even if the corrosion of this welding part is considered, it is possible to produce a cover that can maintain the waterproof performance. Water steel wall. Moreover, depending on the type or shape of the steel material forming the steel wall, the plane width of the steel wall, the position of the joint portion of the welding target, and the number of temporary steel materials required are different, but these are In the formation field, when the soil and sand in the field is removed, it will become a water leakage state. According to need, in order to ensure a possible state of automatic welding, depending on the water leakage position or water leakage state, for example, outside the joint portion of the steel wall or A strip plate or a rod-like member may be provided in the joint portion, or a half-cut steel pipe or a strip plate may be provided on a steel wall temporarily provided on a steel wall or on the outer side of the closest position. -10- (7) (7) 200416329 Furthermore, if there is a water channel near the flushing position, etc., these members can be installed as needed. The installed steel pipe, strip plate, or rod-shaped member is pressed in the direction of the field by water pressure or earth pressure, so that not only the amount of water leakage can be reduced, but also the amount of exudation can be equalized, and the automatic welding can be ensured. Whether or not the joint portion to be welded can be surely sealed, as long as a camera is installed in, for example, an automatic welding machine, it can be confirmed immediately after welding. When the steel wall and the temporary steel wall are separated so that soil and sand can penetrate from the transverse plane, any shielding member may be provided between the steel wall and the temporary steel wall to prevent it. Item 2 of the scope of patent application, such as the method for manufacturing a steel wall of item 1 of the patent scope, wherein between the aforementioned steel wall and the aforementioned temporary steel wall, or between the aforementioned steel wall and the aforementioned temporary wall A shielding member for preventing soil and sand from entering the aforementioned area is provided at the end of the steel wall to form the aforementioned area. The shielding member is preferably a steel material, and is not particularly limited as long as it can be punched between the steel wall and the temporary steel wall. In addition, the shielding member may be combined with the steel sheet pile or the temporary steel sheet pile, and it is not necessarily required to be combined. However, the present invention provides a method for manufacturing a water-shielding steel wall with high water-shielding performance at a joint portion, but not only the water-shielding property during manufacture, but also the corrosion rate of the steel material (fresh water 0 · 2 mm / year or less), etc. , To determine the welding length of the welding part. If the welded length of the welded portion is equal to or greater than the minimum thickness of the steel sheet pile, the corrosion resistance of the steel wall body or more can be sufficiently ensured. In addition, 'i / t is supported by steel walls and temporary steel walls by excavation, etc.-11-(8) 200416329 The removal of soil and sand after the automatic welding of the joint ends is completed. Discharge. In addition, whether or not the installation position of the water-shielding steel wall is contaminated by waste can be checked by excavation soil inspection 'immediately after construction starts. Furthermore, if the middle part of the atmosphere of the water-shielding steel wall is covered with umbrella-shaped concrete after the buried soil is buried, the amount of corrosion of the water-shielding steel wall can be greatly reduced, and the service life can be greatly extended.

The scope of the patent application, item 3, "A method for manufacturing a steel wall", is a method for manufacturing a steel wall that connects a plurality of steel materials having joints at both ends to each other, and is characterized in that: A steel wall with a double-walled structure having a closed region on the inside is formed, and then the sand and / or moisture in the closed region is removed, and then the joint portion of the steel wall is automatically welded. The invention is suitable for the disposal of wastes on the sea surface or on the surface of the water. The method is mainly used for underwater sites and other places where there is a large amount of water and a sheltered place is required.

A steel material having a joint with a steel wall forming a double-walled structure is, for example, a box-shaped steel sheet pile, and a closed area is formed by fitting the inner and outer joints therebetween. In addition, for the box-shaped steel sheet pile, for example, a linear steel sheet pile type, a stell-shaped steel sheet pile or a z-shaped steel sheet pile, a U-shaped steel sheet pile, or a cross-sectional shape in which the linear steel sheet piles are arranged in a double-layer configuration with a partition wall Directionally aligned straight lines may combine asymmetric u-shaped steel sheet piles both inside and outside, or combine these and the steel plates forming the partition wall, or shaped steel such as Η-shaped steel or T-shaped steel to form a box shape, etc. It is not particularly limited as long as it can form a steel wall with a double-walled structure having a closed area -12- (9) 200416329 on the inside. The reason for forming a double wall structure or a box type is that, in addition to the easy implementation of automatic welding in the double wall, it is possible to inspect the leakage of water in the double wall from the waste place, etc. In case of leakage, it is easy to wait for re-welding or filling of the water-proof material in the double wall. These are safety devices that can follow the construction progress.

Although the shape of the double wall is different due to the type of the steel sheet pile, the state of the water seepage from the joint portion of the steel wall and the bottom surface of the double wall can be determined when the water and the like forming the double wall are removed. It can be used to determine whether automatic welding can be performed.

Specifically, in the case of constructing a steel wall in a water area, a steel wall with a double-wall structure is formed by punching of the steel, and a pump or the like installed in the double-wall is used to drain water from the joint or the bottom of the double-wall. The penetration of water is very small. For example, the amount of adhered water and the amount of inflowing water can be evaporated by the heat of the arc welding, or it can be automatically welded if the amount is less than that. In addition, the leakage from the welding section can be confirmed visually or with a camera, etc., and repair can be made on site if necessary. However, in the closed field of the present invention, water can be drained only by a pump or the like if it is in the water or the like. However, in a moor or the like, soil and sand are removed as necessary, and the weld at the joint portion is cleaned. The cleaning of the joints is performed in order to make welding possible and to further ensure the quality of welding. Water spray or high-pressure spray such as air is effective. The automatic welding of the joint part, for example, a guide for automatic welding by a magnet -13- (10) (10) 200416329 can be mounted on a steel sheet pile, etc. by a normal method. In the present invention, the welding speed of the required length of the plate thickness welding portion can be ensured. For example, when MAG welding using C02 gas as the sealing gas is around 10 to 20 cm / minute, it can be doubled in plasma welding. Welding with almost the same quality over a long period of time can be achieved with simple settings. Therefore, compared with the welding operation of the welder, the welding can be performed homogeneously and with good efficiency. When used in the waste disposal field of steel sheet piles, the longer the welding extension is, the more the welding cost can be reduced. However, regarding the performance of the welded part of the joint, the use of a steel sheet pile with an asymmetric joint in a pre-wet state was performed. The automatic welding of the welded part was attempted by changing the welding interval and speed. As a result of the welding portion, it has been confirmed that even if the joint is in a wet state, sufficient welding plate thickness and welding portion can be obtained by automatic welding. Whether or not the joint portion to be welded can be surely sealed, as long as a camera is installed in, for example, an automatic welding machine, it can be confirmed immediately after welding. Further, for welding, welding requires a work space or a rest space when welding by a welder, and the welding itself is vertical welding (horizontal welding) which is more difficult than welding in the lower direction. In the present invention, compared with the operation of a welder, the welding by automatic welding does not need to ensure a large work area, and because the sand and / or moisture in the closed area is removed for welding, water welding is not required. The special machine used can maintain the uniformity of welding quality. That is, the present invention is a method for manufacturing a water-shielding steel wall capable of satisfying the environmental safety of a material surface and having the function of a safety device of a punching facility type. (14) (11) (11) 200416329. However, there is a lot of water leakage from the joint portion, and direct automatic welding is difficult. For example, the outer side of the joint portion or the joint fitting portion is provided with a continuous length in the joint length direction for plugging the gap between the joints. The strip member reduces the water leakage from the joint part and makes automatic welding easy. Specifically, the long member is a small rod-like resin-like member, a tube, or a metal round rod inserted into a gap of a joint fitting portion to be welded, or a thin plate is provided outside the joint. , High resin flakes with melting point, etc. When the water in the steel double wall is drained by the pump in this state, the long member is closely adhered to the gap of the joint portion by the water pressure difference between the inside and outside, and a water-stopping effect can be obtained. This reduces the amount of water leakage and facilitates automatic welding. Item 4 of the scope of patent application, such as the method of manufacturing a steel wall of the scope of patent application No. 3, wherein the upper layer of sand and / or moisture is removed by a water-shielding layer existing in the closed area, and the welding is performed automatically. Until under the water. For example, when there is a water-shielding layer in the submarine site of the sea surface waste disposal site, even if the water is partially shielded in the sea, the layer above the water-shielding layer such as the clay layer on the sea-floor site may have insufficient water stopping. In this case, the sand and the like on the upper part of the water-shielding layer are removed, and if possible, a part of the water-shielding layer is removed for automatic welding, and the water-stopping property can be ensured even for the subsea portion. Specifically, the site up to the water-shielding layer is excavated by water jets or a cutting machine, and the soil and sand are drained together by a sand pump and the like. As described above, the object is -15- (12) (12) 200416329. Automatic welding and shielding. After that, the lower side is buried again as a water-shielding layer. Although no drainage is required, the drained water is filtered by a sand pump or the like into fine and coarse particles on a floating boat or a temporary working space. After the water-proofing material is put in as required, burying these in order from the fine and coarse grains to the steel double-walled wall can reduce the water permeability coefficient from the inner bottom surface of the steel double-walled wall, and more reliable high water-shielding can be obtained. structure. The scope of patent application No. 5 is a steel wall. A plurality of steel materials having joints at both ends are steel walls connected by the aforementioned joints. The feature is that the joint portion is covered with a steel water-proof profile. The water-proof profile and the steel material and / or the water-proof profile are continuously welded to each other without any gap in the longitudinal direction. In the present invention, in order to obtain a high water-shielding property at a joint portion of a steel wall, a joint portion of a steel material such as a steel sheet pile is covered with a water-stop profile, and the steel and the water-stop profile or water-stop are used. The profiles are continuously welded to each other or both without any gap in the longitudinal direction. This type of joining can be performed by an automatic welding machine or the like by removing soil, sand, or moisture near the welding position to ensure a space where welding is possible. Item 6 of the scope of patent application, for example, the steel wall of item 5 of the scope of patent application, in which the aforementioned water-preventing profile material covers the joint, is engaged, or is welded near the joint of the aforementioned steel. The sealing material for covering the joint portion may be a steel material installed in advance by welding or the like. A locking portion extending in the longitudinal direction of the steel material is provided on the steel material. The sealing material is provided with a lip. Grooved steel or a mountain shape with a lip -16- (13) (13) 200416329; Steel Temple 5 may also engage the lip portion of the end of the water-stop profile with the steel stop. Shapes for water-stops installed on steel materials and those with other steels welded together, those with heat-stops for steel materials installed on both sides welded to each other, shapes for water-stops installed on steels, and cards for other steels Anyone who welds the stops, the lips or flanges of the water-stop profile, and the steel provided on both sides, or the locking parts of the steels on both sides, etc., any of the steel walls, The purpose of the invention can be fully achieved. The shape of the water-stopping material is not limited to the above-mentioned lip grooved steel or lip ridged steel, and can cover the joint portion, and the cross-sectional shape is not particularly limited as long as it can be easily mounted on a steel wall. In addition, as long as the material of the shape for the water stop is provided with appropriate strength and weldability, it may be other than steel. Item 7 of the scope of patent application, such as the steel wall of scope 5 or 6, of the patent application scope, where the connected steel material is washed into the water and / or the ground. The scope of application for patent No. 8 is a method for manufacturing a steel wall, a method for manufacturing a steel wall that connects a plurality of steel materials having joints at both ends to each other, characterized in that the aforementioned steel materials are fitted and punched together Forming a steel wall with a double-walled structure with a closed area on the inside, and removing the sand and / or sand existing in the closed area while covering the closed area side of the joint with a steel water-stop profile. Or water, the water-sealing profile and the steel material or water-sealing profile covering the joint are continuously welded to each other without gaps in the longitudinal direction by automatic welding. -17- (14) 200416329 Steel-type steel sheet piles and the like having joints with steel walls forming a double-walled structure are fitted in the area by fitting the inner and outer joints. In addition, for the box-shaped steel sheet pile, for example, a linear steel sheet pile type, a steel sheet pile, or a pile, a U-shaped steel sheet pile in which a linear steel sheet pile is double-divided with a partition wall, or a cross-sectional shape in a straight line may be combined linearly The asymmetric U-shaped steel sheet piles form the inside or outside, or combine these and the steel forming the partition wall or the shaped steel such as Η-shaped steel to form a box shape, etc., forming a steel wall with a double-walled structure on the inside, In addition, the shape is not particularly limited as long as the shape can be installed near the joint. The scope of application for patent No. 9 is a steel wall method in which a plurality of steel materials having joints at both ends of a manufacturer of a steel wall are connected to each other, wherein the steel material is a steel wall obtained by fitting the joints to each other, and then A closed area is formed up to the water-shielding layer near the joint of the steel wall, and the joint is covered with a water-stop profile to remove the sand and / or moisture existing in the joint and cover the joint. The water-resistant shaped steel materials or the water-resistant shaped materials are continuously welded to each other in a length gap by automatic welding. The steel wall with a patent scope of 5 to 7 applies to the case where the double-walled structure wall is formed in the manufacturing method of the steel wall of the eighth scope without limitation. In the case of a steel wall with a double-walled structure, a patent is available. The 9th item of the scope is the method of packing and sealing the soil and sand near the aforementioned joints of the steel wall in a closed-layer configuration between the boxes and the Z-shaped steel plate is aligned to form a double-layer configuration of steel or T-closed areas. Punched and shaped earth and sand excavates the materials in the closed area side and the above-mentioned directions. The closed area is formed by applying for special manufacturing of steel to apply the control to cover -18- (15) 200416329 water layer. That is, a space for automatic welding or the like of the closed collar formed on at least the sheet side of the steel wall. However, the method in item 8 or 9 of the scope of patent application is related to preventing water from penetrating into the closed area formed on the side of the double-walled structural wall, and draining the water that stagnates in the area surrounded by the steel, as required, or Invest in filling materials in areas surrounded by steel. In addition to filled materials, such as mortar materials, plaster materials, or materials that solidify with high moisture content, you can also use leaching. In addition, the 8th or 9th in the scope of the patent application is that in the closed area of some manufacturing methods, the sand or moisture can be removed only by a pump or the like. In a moor, etc., the sealing material covering the joint part according to the need The specific method of removing soil and sand such as the clearance between steel and steel is a method of cutting the site from the water to the water-shielding layer in a controlled manner and draining the water by pumping. Welding of steel materials such as steel sheet piles and the water-proof or water-proof profiles covering the joints can be performed in the general invention, such as steel guides, which can be inserted into the guide for welding. Welding degree, for example, after using CO2 gas as the sealing gas is 10 ~ 20 cm / minute, in plasma welding-the domain can be used as the inside of the steel wall manufacturer or the steel can be stopped by water. The absorbent, clay, sand, and sand that are absorbed by the shaped material and the water-absorbing material made of the shaped material for the water stop exist in the steel wall, and the soil and sand are removed in the water and the like. A method such as a sand pump such as a jet or a control machine is used to weld the soil and sand with a profile, and the IS is automatically welded by a magnet. For MAG welding with a welding speed of length, double-pass -19- (16) (16) 200416329 degrees can be used, and welding of almost the same quality over a long period of time can be achieved by simple settings. Therefore, compared with the welding operation of the welder, the welding can be performed homogeneously and with good efficiency. When used in the waste disposal field of steel sheet piles, the longer the welding extension is, the more the welding cost can be reduced. Further, for welding, welding requires a work space or a rest space when welding by a welder, and the welding itself is vertical welding (horizontal welding) which is more difficult than welding in the lower direction. In the present invention, compared with the operation of a welder, the welding by automatic welding does not need to ensure a large work area, and because the sand and / or moisture in the closed area is removed for welding, water welding is not required. The special machine used can maintain the uniformity of welding quality. Item 10 of the scope of patent application, such as the method of manufacturing a steel wall of the scope of patent application No. 8 or 9, wherein the sand and / or moisture existing in the closed area is removed to the upper part of the water-shielding layer. . For example, when there is a water-shielding layer in the submarine site of the sea surface waste disposal site, even if the water is partially shielded in the sea, the layer above the water-shielding layer such as the clay layer on the sea-floor site may have insufficient water stopping. . In this case, the sand and the like on the upper part of the water-shielding layer are removed, and if possible, a part of the water-shielding layer is removed, and the sealing material covering the joint is pushed into the water-shielding layer. The area surrounded by the water-stop profile and steel, or the water that stagnates in the area surrounded by the water-stop profile and the steel, is drained by a pump or the like to prevent water from seeping from this area to the closed area. , Remove the sand and / or moisture existing in the closed area, and finally join the joint part of the steel and the sealing material in the atmosphere-20- (17) (17) 200416329 or the sealing material to each other By automatic welding, water-stopping can be ensured even for the subsea portion. The scope of application for patent item No. 11 is a sheet pile type steel wall in which a plurality of steel sheet piles having joints at both ends are connected to each other by a sheet pile type steel wall formed by the aforementioned joints, which is characterized in that the aforementioned steel sheet piles Is a flat portion in the same direction as the punch line near the joints at the two ends, the cross-sectional shape of the joints at the two ends is left-right asymmetrical, and one of the joints engaged with each other is formed inwardly of the flat portion, The other side of the joint is formed outward from the flat portion, and further has a protrusion at the base of at least one of the joints, and a plurality of steel sheet piles can be aligned with each other in a state where the cross-sectional shapes of the steel sheet piles are aligned in the same direction. They are connected in a straight line, and the protrusions of the one joint and the outer surface of the other joint are continuously welded without gaps in the longitudinal direction. Steel sheet piles with asymmetric joints, such as any of straight type and U-shape (shapes with flanges on the net and its both sides, etc.) may be used. In addition, the type of welding between the protrusion of one of the aforementioned joints and the outer surface of the other joint may be gas-sealed arc welding such as TIG, MIG, MAG, or ion arc, regardless of the type of welding material or sealing gas. . The rotation of the joint portion of the steel sheet pile is restricted by the protrusion provided at the base of the joint. The scope of application for patent item No. 12 is a sheet pile type steel wall. A plurality of steel sheet piles with joints at both ends are sheet pile type steel walls connected to each other by the aforementioned joints. The feature is that the aforementioned steel sheet piles are There is a flat portion in the same direction as the punching line near the joints -21-(18) (18) 200416329 at the two ends. The cross-sectional shape of the joints at the two ends is left and right asymmetric. One of the joints that engages with each other is For the flat portion to be formed inward, the other side of the joint is formed outwardly to the flat portion. The base portion on the joint side in the inner direction has an inward protrusion, and the base portion on the outward joint side has an inward projection. The rising portion can connect a plurality of steel sheet piles in a straight line in a state where the cross-sectional shape of the steel sheet pile is aligned in the same direction. The outer side of the outward joint and the inward protrusion are in the longitudinal direction. Continuous welding without gaps. That is, the 12th scope of the patent application is equivalent to the sheet pile steel wall of the 11th scope of the patent application, which has the aforementioned protrusions at the base of the inward joint side of one joint and the joints of the other joint. The base on the outward joint side has the case of an inward standing portion. Item 13 of the scope of patent application, such as sheet steel wall of item 11 or 12 of the scope of patent application, wherein the plurality of steel sheet piles are two sheet pile walls connected by the joints at the two ends, The joint portions of the joints of each sheet pile wall are flushed into the water and / or the ground in a state where the joint portions of the joints face each other inwardly. Another problem common to the technologies described in the conventional technology is the production and installation of protrusions for maintaining the distance from steel sheet piles, joint members with special shapes, water-shielding members, or restraint members. It is necessary to increase the water-shielding sealing material, the water-shielding sealing material with an expansion property, or the mortar material, and increase the cost for water-shielding (manufacturing costs of water-shielding members, water-shielding materials, etc., or on-site construction) cost). -22 · (19) (19) 200416329 Furthermore, there is a water-shielding caused by the external deterioration of the water-shielding sealing material, the swellable water-shielding material, or the mortar due to aging or peeling of the sheet pile wall. The problem of performance degradation. In order to solve such a problem, the present applicant has invented a feature of the shape of the joint of the steel sheet pile of the asymmetric joint described above, and welds the joint connection portion. Further, as will be described later, for the left and right asymmetric joint joints, the outer side of the outer joint and the inward protrusions are continuously welded in the longitudinal direction of the steel sheet pile, and the base of the outer joint side will be welded continuously. Compared with the case where the inwardly protruding standing portion and the outer side of the inward joint are continuously welded in the longitudinal direction of the steel sheet pile, the former is more stable, and it is easier to form the weld bead without gaps. The water-repellency of this part was found. However, when a non-consumable electrode type welding method such as TIG or plasma arc welding is applied to the welding of the outer surface of the outer joint and the inward projection, the projection is melted and welded to the outer surface without using a welding material. The protrusion and the outer surface may be fused and integrated together. The scope of application for patent item No. 14 is a steel sheet pile having a steel sheet pile with joints at both ends, which is characterized in that a flat portion in the same direction as the punch line is near the joints at the two ends, and a cross section of the joints at the two ends The shape is asymmetrical left and right. One of the joints that are engaged with each other is formed inwardly of the flat portion. The other of the joints is formed outwardly of the flat portion. The base of at least one of the joints has a protrusion. In a state where the cross-sectional shape of the steel sheet pile is aligned in the same direction, a plurality of steel sheet piles can be linearly connected to each other, and a part or all of the aforementioned protrusions are formed by -23- (20) (20) 200416329. Made of partially low melting point materials. The overall shape of the steel sheet pile, such as any one of a straight shape and a U shape (a shape with flanges on the net and its both sides), may be used. Low melting point materials that form part or all of the protrusions, such as welding materials (filling metal) or welding electrodes (brass or silver) with lower melting points than steel are the best. The rotation of the joint portion of the steel sheet pile is restricted by the protrusion provided at the base of the joint. The scope of application for patent item No. 15 is a steel sheet pile, which is a steel sheet pile with joints at both ends, which is characterized in that: near the joints at the two ends, there is a flat part in the same direction as the punching line; The cross-sectional shape is asymmetrical left and right. One of the joints engaged with each other is formed inwardly of the flat portion, and the other of the joint is formed outwardly of the flat portion. The base portion of the inward joint side has an inward The protrusion 'has an inward standing portion at the base of the outward joint side', and the plurality of steel sheet piles can be linearly connected to each other in a state where the cross-sectional shapes of the steel sheet piles are aligned in the same direction, and the aforementioned protrusions Some or all of them are made of materials with lower melting points than others. That is, the 15th scope of the patent application is equivalent to the steel sheet pile of the 14th scope of the patent application. The base of the inward joint side of one joint has an inward protrusion, and the outward of the other joint is outward. A case where the base on the joint side has an inward standing portion. Connect the steel sheet piles in the scope of patent application No. 14 or 15 to each other by the aforementioned joint portion, and heat the aforementioned protrusion to make the outer side of the joint portion and the aforementioned protrusion continuous from -24- (21) (21) 200416329 in the longitudinal direction. Joints without gaps, providing sheet pile steel walls with high water barrier. When the means for heating the protrusions at the time of forming such a joint is a gas-sealed arc welding, a non-consumable electrode type such as TIG or plasma arc is optimal, regardless of the type of sealing gas. For example, in the case of joining in water, a method of heating the joint using plasma arc welding is suitable, and in the case of joining in the atmosphere, a method of melting the metal or the osmium by heating the flame torch may be used. The applicant is the same as in the case of items 11 to 13 of the scope of patent application. For the fitting part of the left and right asymmetric joint, the outer side of the outer joint and the inward protrusion are continuous in the length direction of the steel sheet pile. For the purpose of gapless joining, 'the case where the inward protrusion is formed almost as a material with a lower melting point than the other parts of the steel sheet pile, and the case where the inward protrusion is formed with the same material as the other parts of the steel sheet pile. Comparison. However, at this time, the heating means is a method using a non-consumable electrode type gas-sealed arc welding, which employs a plasma arc welding device, and heats by drawing inward protrusions in the atmosphere. For the former, before the base material starts to melt, the low melting point material forming the inward protrusion is melted out, and it is easier to melt the low melting point material between the outer side of the outer joint and the inward protrusion. The material is formed without gaps and has water-blocking properties. (Effects of the Invention) According to the present invention, in the case where steel sheets having a joint are connected to each other to produce -25- (22) (22) 200416329 steel sheet piles, a space for automatic welding of the joint portion is formed, and does not The workability is lost, and an efficient and inexpensive high water-shielding property can be obtained. In particular, as in the method for manufacturing a steel wall of the scope of application for patents Nos. 1 and 2, the space available for automatic welding of the joint portion of the steel sheet pile wall by using a temporary steel sheet pile can be efficient and inexpensive. Homogeneous welding is performed in place, and high reliability of the water-shielding wall can be expected for the completed steel wall. In addition, the method for manufacturing a steel wall in the scope of patent applications Nos. 3 and 4 uses an internal closed space of a steel wall with a double-walled structure to perform automatic welding of the joint portion, which can efficiently and inexpensively perform homogeneous welding. For the completed steel wall, the high reliability of the water-shielding wall can be expected. And 'by checking the leakage after welding, it can be re-welded on the spot as needed'. For the harmful substances flowing out in the waste treatment plant, etc., water quality inspection can be performed in the double-walled wall. In case of water leakage, it can be stopped. Water fills the double wall to cope with waiting, etc., and has a safety device function. The steel wall of the scope of patent application No. 5 to 10 is not limited to the internal closed area of the steel wall of a double wall structure formed by connecting steel materials having joints at both ends to each other, or a double wall. The wall structure utilizes a closed space secured near the joint portion of the steel wall, so that the sealing material and the steel material and / or the sealing material covering the joint are free from each other in the longitudinal direction by automatic welding or the like. Ground continuous welding does not impede the connection of the joints of steel materials. 'Steel walls can be manufactured efficiently and inexpensively, and for finished steel walls, high reliability of the water-shielding wall can be ensured. The sheet pile type steel wall of the scope of application for patent Nos. 11 to 13 is because the joints of the steel sheet piles that have been connected and punched in can be welded without gaps, so -26- (23) 200416329 can completely Prevent intrusion of groundwater or seawater from the joints between steel sheet piles. In addition, because no swelling water-shielding material or water-shielding member is required, the production cost and construction cost are low. By combining with other steel materials such as steel sheet piles and stell-shaped steel, various sections can be realized. Performance steel wall.

According to the steel sheet piles Nos. 14 and 15 of the scope of patent application, the joints of the steel sheet piles that have already been connected and constructed do not have a problem in joining, so they can be joined stably without gaps. [Embodiment] Fig. 1 is the first item in the scope of patent application of the present application. The steel material with joints and temporary steel material is an example of a construction procedure when a steel sheet pile is used. It is shown in a flowchart, and the operation is performed by the following procedure. .

According to the construction capacity and number of steel sheet pile punching machines, start the construction of the steel wall from any part of the shielded steel wall (Figure 1a) ° At least one temporary steel sheet pile ( Figure 1 b), forming an area surrounded by a part of a steel wall and a temporary steel sheet pile (No. 1 ® C) 〇 After the soil and sand in the closed area are removed by excavation (Figure 1 d), the area is washed The joint part of the inner steel wall (Figure 1 e). Next, an automatic fusion splicer is assembled in the field (fig. 1f) and is automatically welded (fig. 1g). After confirming that the water can be surely stopped, pull out the temporary sheet pile (Figure 1 h) °, and complete the water-shielding steel wall by replying a to h above. -27- (24) (24) 200416329 However, when the temporary steel coil is pulled out in h, the steel sheet pile is 'punched down', and b ~ g can also be used in this case. It is assumed that the removal of the steel sheet pile can be performed at any time point. For example, after confirming the reliability of the water stop of the welded portion performed first, the removal may be performed. Fig. 2 is an example showing a case where the steel materials constituting the steel wall A are U-shaped steel sheet piles 11 and the steel wall A is a joint at both ends of the U-shaped steel sheet piles 1 1 arranged alternately in the reverse direction. Connected to each other. On this side of the steel wall A, in this example, a temporary steel wall 0 composed of the same U-shaped | steel sheet pile temporary steel sheet pile 1 11 is arranged to form a holding steel wall A and a temporary steel wall D. Closed area B. Further, in this example, three temporary steel sheet piles 11 are used to form one closed area B ', and the welding target joint portions J of the steel wall A of the closed area B are two. However, if five temporary steel sheet piles 11 and 11 are arranged in succession, two closed areas B can be formed at the same time, and the welding target joint portions J in those closed areas B are four. When seven temporary steel sheet piles 11 and 11 are connected in succession, three closed areas B are formed at the same time. At this time, the number of joints J to be welded is six. Depending on the conditions of the construction or the shape of the steel, the construction equipment, construction procedures, etc., can be appropriately determined. FIG. 3 shows the steel constituting the steel wall A. The joint shape of the joint portion J at both ends is asymmetrical left and right. The cross-sectional shape can be aligned in the same direction in a straight line. The flat part in the same direction as the punching line, one side using hook-shaped joints that engage with each other is inward with the outermost edge of the steel wall A, and the other side is outwardly formed. -28- (25) (25 200416329 is an example of the case of U-shaped steel sheet pile 1. However, the joint shape of the asymmetric U-shaped steel sheet pile 1 described above is described in detail in the description of other embodiments. In this case, as shown in the figure, if the steel sheet pile 11 is temporarily installed, if the asymmetric U-shaped steel sheet pile is used, one closed area B can be formed by one asymmetric U-shaped steel sheet pile. Of course, it is also possible to connect a plurality of asymmetric U-shaped steel sheet piles temporarily provided with the steel sheet piles 11 to form a plurality of locked areas B at the same time. In addition, when using such asymmetric U-shaped steel sheet piles, compared with U-shaped steel sheet piles having the same degree of cross-section rigidity, the characteristics of asymmetric joints that can be aligned in a straight line by aligning the cross-sectional shape in the same direction The thickness of the water-shielding steel wall A can be reduced. Therefore, when it is applied to, for example, a waste disposal site, it is possible to manufacture the steel wall A, which has the largest effective volume of the waste disposal site even if the space available for construction is limited. Furthermore, if an asymmetric u-shaped steel sheet pile is used for the steel wall A or the temporary steel wall D, as shown in FIG. 3, the joint part J of the welding target can be arranged at the position farthest from the temporary steel sheet pile 11. 'Because all welding stations are in the same direction, there are advantages such as easy automatic welding. FIG. 4 is an example showing a case where the steel constituting the steel wall A is formed by using a stell-shaped steel connecting the steel 1 c for increasing the rigidity of the steel wall A with the asymmetric u-shaped steel sheet pile 1. . In this example, the temporary steel sheet pile 11 is an asymmetric U-shaped steel sheet pile, and the temporary steel wall D is formed by two temporary steel sheet piles 11. In this case, a large closed area B is formed. After removing the soil and sand in the closed area B, -29- (26) (26) 200416329 can automatically weld the joint portion J of the steel wall A from the inside. The same applies to the case where a normal U-shaped steel sheet pile or a straight steel sheet pile is formed instead of the asymmetric U-shaped steel sheet pile 1, and a T-shaped steel material is used instead of the stell-shaped steel connecting the steel material 1c. In addition, as long as an area where an automatic welding machine can be welded is obtained, a temporary steel sheet pile of an arbitrary form may be used instead of the temporary steel sheet pile 11 '. FIG. 5 shows that the steel material constituting the steel wall A is a straight steel sheet pile 21 and a shielding member 2 1 s with a steel plate, a stell-shaped steel, or a T-shaped steel is provided between the temporary steel walls D ( Or 2 1 s', 2 1 s ") (corresponding to item 2 of the scope of patent application). The case where the steel wall A is formed by the linear steel sheet pile 21 is the same as the concrete steel sheet pile or not. Compared with the symmetrical U-shaped steel sheet pile, it is difficult to increase the separation distance from the steel wall A and the temporary steel wall D in this way. Therefore, it is desirable to use a shielding member 21s (or 21s', 21s) as shown in FIG. ) Close the cross section of the closed area B to ensure the minimum water-stop for automatic welding, or to prevent soil and sand from flowing into the excavated part. As shown in FIG. 2 or 3, when the distance from the steel wall A and the temporary steel wall D is not fixed, the steel plate is used as a shielding member in the area next to the area where the automatic welding joint exists, for example. Or shaped steel can prevent soil and sand from flowing into the excavated part. As shown in Fig. 5, the situation where the earth pressure shielding member 21s (or 21s ^, 21s ") falls down may be a deep planting or a spacer. And, as mentioned above, the shielding member 21s (or 21s', 21s ") does not have to be in contact with the steel wall A or the temporary steel wall D. -30- (27) 200416329 Figure 6 is in this case The scope of application for patent No. 3, steel with joints, uses box-shaped steel sheet piles, an example of a construction procedure applicable to seawater is shown in a flowchart, and operations are performed by the following procedures (in the case of rivers, lakes, etc.) The same). According to the construction capacity of the steel sheet pile punching machine and the number of units, the steel wall of the double-wall structure of the box-shaped steel sheet pile (steel sheet double wall) ) (Figure 6a).

Next, in each closed area of the double wall partitioned by the box-shaped steel sheet pile, the seawater inside is drained by a pump or the like (Fig. 6b). After confirming that there is less water leakage in the closed area, the joints of the box-shaped steel sheet piles can be welded by an automatic welding machine (Fig. 6c). The above is the basic procedure of this manufacturing method. However, when there is a large amount of water leakage from the steel sheet pile joint part or the bottom surface of the double wall of the steel sheet pile, as described above, the length of the gap between the joints is provided outside the joint part or in the joint fitting part. Countermeasures against leakage of water, such as strip members.

In addition, the soil structure of the submarine site, that is, the position, thickness, and properties of the clay layer that becomes the sand layer or the water-shielding layer, is used to remove and remove the soil and sand on the bottom surface of the double wall of the steel sheet pile (Figure 6d) and wash After the joint part (Fig. 6e), an automatic welding machine (Fig. 6f) is assembled, and after the drainage of Fig. 6b of the basic procedure, automatic welding is performed (Fig. 6g). Fig. 7 is an example showing a case where the steel material constituting the steel wall of the present invention is a box-shaped steel sheet pile 31 in which linear steel sheet piles are arranged in two layers. The box-shaped steel sheet pile 3 1 shown in FIG. 7 is a steel material of a slightly 剖面 -shaped cross section connected by two parallel flanges -31-(28) 200416329 section 3 1 f by a mesh section 3 1 w. Each flange The part 3 1 f is in the form of a linear steel sheet pile having fitting joints 3 2, 3 3 at both ends. The adjacent box-shaped steel plates 3 1 are formed by fitting and sequentially connecting the joints 3 2 and 3 3 at both ends of two parallel flange portions 3 1 f, and gradually forming a closed space on the inside. Steel wall A of B's double wall structure.

In water area construction, usually, the closed space B is almost filled with water, and the lower part of the closed space B is in a state of soil and sand deeply planted on the bottom of the water. In this state, the water inside the closed space B is drained by a pump or the like, and the fitted joint portion J of the joints 3 2, 3 3 is welded from the inside by an automatic welding machine using the closed space B, thereby ensuring the joint by welding. The water-stopping property of the part J. In the case where water seeps from the bottom surface side, the soil and sand are removed by a water jet or a shovel, etc. to a predetermined depth of the bottom surface, and automatic welding of the joint portion J of the portion is performed, and then the soil and sand of the deep planting portion are buried. return. However, as mentioned above, the welding of the joint portion J is the extent to which the attached moisture and the amount of the inflowing water f can be evaporated by the arc heat of the welding, or the amount is less than that, the automatic welding can be performed, and water leakage is a problem. The time is when re-welding of the joint portion j is performed, or other measures for water leakage are necessary. Figures 11 to 13 show examples of countermeasures against such leaks. However, the symbol of the "joint part" uses the symbol of Fig. 7 (joint j 2, 3 3) ", and the figures 9 and 3 will be described later! The same applies to the embodiments shown in FIG. -32- (29) 200416329 Figure 11 shows the outer side of the joint portion J formed by the fitting of the joints 3 2, 3 3 (the steel wall A receives higher water pressure or soil from the outside than the inside). (Press side), which is made of a flexible sheet-like synthetic resin, and is provided in the longitudinal direction of the joint portion in the case of a continuous long (long tape) member s 1.

If the water and / or earth and sand on the inside of the double wall are discharged, the water pressure or soil pressure on the outside of the double wall is higher than the inside, so the long member s 1 is drawn into the gap between the joints 3 2, 3 and 3. The form is in close contact with the joint portion J, and in its part, water can be completely blocked from flowing from the outside to the inside of the double wall. 12 and 13 are not outside the joint portion J, but are inserted into a rod-shaped member, a tube, or a metal rod made of resin in the fitting portion of the joints 3 2 ′ 3 3 that are fitted to each other. In the case of the long member S2.

When the long member s2 is inserted, a gap larger than its diameter is inserted. In this state, if water and / or earth and sand on the inside of the double wall are discharged, the water pressure or soil pressure on the outside of the double wall is smaller than The inner side is high, so the long member s2 is sucked toward the inner side of the double wall. It is in close contact with the wide part of the gap of the joints 3 2, 3 3, and it can block water from the outer side of the double wall. Flow inward. However, the long members s 1 and s 2 are made of flexible materials or more elastic materials, and the degree of adhesion will increase, which will be closer to completely covering the water. As long as it does not affect the degree of automatic welding, it is slightly Leakage is allowed. Fig. 8 is a diagram showing an example of a case where a steel sheet constituting the steel wall of the present invention uses a box-shaped steel sheet pile in which an asymmetric U-shaped steel sheet pile is arranged in two layers. -33- (30) (30) 200416329 The box-shaped steel sheet pile 3 1 · shown in Fig. 8 is a left-right asymmetric shape of the joints 3 2 and 3 3 at both ends, forming a cross-sectional shape aligned in the same direction. A straight-line connection is possible, and there is a flat part in the same direction as the punching line near the joint part at both ends. One of the hook-shaped joints 3 2, 3 3 that engages with each other is inward and the other is formed outward. At both ends, asymmetric U-shaped steel sheet piles with joints 3 2 and 3 3 are arranged on the back side and integrated by welding. For the adjacent box-shaped steel sheet piles 3 Γ, the two-walled steel wall with a closed space B on the inside can be gradually formed by fitting the joints 3 2 and 3 3 at both ends in sequence. A. The drainage of sand, sand, and / or water in the closed space B, automatic welding, and water leakage countermeasures are the same as those in the embodiment shown in FIG. Fig. 9 shows another embodiment of the steel constituting the steel wall of the present invention, in a case where an asymmetric U-shaped steel sheet pile is arranged in a double-layered box-shaped steel sheet pile 3 1 ". The box type of Fig. 8 The steel sheet pile 3 1 ′ is an asymmetric U-shaped steel sheet pile arranged to be bonded on the two backs, and is integrated by welding. However, the box-shaped steel sheet pile 3 1 ″ shown in FIG. 9 is arranged on the two backs and bonded. The asymmetric U-shaped steel sheet piles are integrated by welding stell-shaped steel as the connecting steel 3 1 c to improve section rigidity. That is, by increasing the length of the steel materials connecting the asymmetric U-shaped steel sheet piles to each other to increase the section rigidity, the connecting steel material 3 1 c is used to increase the torsional rigidity by using a stell-shaped steel to reduce the occurrence of welding deformation and make Making it easy. -34- (31) (31) 200416329 In the embodiment shown in FIGS. 7 to 9, a plurality of box-shaped steel sheet piles are welded on land to form an element, and those punching connections may be used. FIG. 10 shows an example of a steel material constituting the steel wall of the present invention, which is a case where a normal U-shaped steel sheet pile 11 is used. In this example, the steel itself is not a box type, but the U-shape The steel wall double-layer formed by the steel sheet pile 11 is arranged in a double-wall structure, and a closed area B can be formed on the inside. In this case, since the number of joints J is increased, in order to improve the workability, a plurality of U-shaped steel sheet piles 11 are welded on the ground before being punched. Fig. 14 is a steel material having a flat portion near the joint, and a box-shaped steel sheet pile 31 shown in Fig. 15 is used. An example of a construction procedure suitable for a case of seawater is shown in a flowchart. The following procedure is shown. Perform operations (the same is true for rivers, lakes, etc.). (1) According to the construction capacity and number of steel sheet pile punching machines, steel wall A (double wall of steel sheet pile) with double wall structure of box-shaped steel sheet pile 1 is started from any part of steel wall A Construction (Figure 14a) 〇 The soil layer structure of the subsea site, that is, the position, thickness, and properties of the sand layer or clay layer, will be deposited on the double wall of the upper part of the water-shielding layer of poorly soiled sand, etc. Excavation of the bottom soil and sand in the double-layered wall of the steel sheet pile will drain the soil or water from this part (Fig. 14a '). However, at this time, it is not necessary to exclude the water in the closed area B of the double-layer wall. (2) Next, cover the joint portion J of the box-shaped steel sheet pile 3 1 punched by (1), and replace the lip portion of the water-resistant profile 51 with the lip groove-shaped steel -35 · (32) ( 32) 200416329 5 1 r is engaged with the locking portion 3 1 r of the flat portion 3 4 provided near the joints 3 2 and 3 3 of the steel sheet pile 3 1 and inserted into the double wall. If necessary, pour into the soil at the bottom of the sea (Figure 14b). (3) Thereafter, in order to prevent water stagnation in the joint water-stop region C surrounded by the water-stop profile 51 and the steel sheet pile 31, the closed region B in the double-walled wall is intruded into the joint water-stop region. In C, the stagnant water is continuously discharged by a pump or the like (Fig. 14c). Alternatively, for the purpose of preventing water from intruding from the outside of the double wall to the inside through the joint portion J, the water stop area C of the joint surrounded by the engaged water-stop profile 51 and the box-shaped steel sheet pile 3 1 is put in Filling materials such as stucco (Fig. 14C). It was confirmed that no water infiltration from the joint water-stopping area C into the closed area B in the double wall was observed by the input of the filling materials. Specifically, it is sufficient to confirm the change of the water level in the double-walled closed area B. (4) After that, it is enclosed in each closed area B in the double wall partitioned by the box-shaped steel sheet pile 31, and the internal seawater (depending on the situation, soil and sand can also be drained) is drained by a pump or the like (Figure 14D) ). However, in the case of the process of (3), it may be implemented in parallel with the process of (4). (5) Confirm that there is no water intruding into each closed area B in the double wall from the outside, and weld the gap between the lip grooved steel and box-shaped steel sheet pile 31 of the water-proofing material 51 with an automatic welding machine. (Figure 14e). In Fig. 15 (b), reference numeral 7 indicates a welded portion. In the present invention, for a water-repellent portion of a joint portion of a steel material such as a steel sheet pile, the steel wall -36- (33) (33) 200416329 is completely covered with water by continuous welding without gaps in the longitudinal direction. In particular, when a steel material having a flat portion near the joint portion is used, the advantage due to its shape is also large. Fig. 15 shows a case where the steel constituting the steel wall A uses a box-shaped steel sheet pile 31. The box-shaped steel sheet pile 3 1 shown in FIG. 15 is a steel material of a slightly 剖面 -shaped cross section in which two parallel flange portions 3 1 f are connected by a mesh portion 3 1 w. Each flange portion 3 1 f is It has a form of a linear steel sheet pile having joints 3 2, 3 3 fitted to each other at both ends. For the adjacent box-shaped steel sheet piles 3 1, the joints 3 2 and 3 3 at both ends of the two flange portions 3 1 f that are parallel to each other are connected in order to form a closed space on the inside. Steel wall A of B's double wall structure. In water area construction, usually, the closed space B is almost filled with water, and the lower part of the closed space B is in a state of soil and sand deeply planted on the bottom of the water. Then, as shown in the figure, the lip portions 5 1 r at both ends of the lip groove-shaped steel with the lip groove-shaped material 5 1 and the flat portions 3 4 provided at the flange portion 3 1 f of the steel sheet pile 3 1 are stuck. The stop 3 1 r engages and engages across the joints 3 2 and 3 3. Then, the water inside the closed space B is drained by a pump or the like, and the gap between the water-stop steel 51 and the steel sheet pile 31 is fused by the closed space B by an automatic welding machine, thereby achieving complete shielding by welding. Water-based. However, in the case where water leaks from the bottom surface side, the sand and sand are removed by a water jet or a shovel or the like from the bottom surface to a predetermined depth, and the water-stopping steel 5 1 and steel sheet pile 3 1 which are poured into the soil After automatic welding, the soil and sand in the deep planting part are buried. Fig. 16 shows an example of a case where a steel sheet constituting a steel wall uses a box-shaped steel sheet pile 3 Γ in which asymmetric U-shaped steel sheet piles are arranged in two layers. -37- (34) (34) 200416329 Example. The box-shaped steel sheet pile 3 Γ shown in FIG. 16 is a left-right asymmetric shape of the joints 3 2 and 3 3 at both ends. The cross-sectional shape can be aligned in a straight line in the same direction. The joints at both ends are possible. There is a flat portion 3 4 near the part J, which is formed in the same direction as the punch line. The hook-shaped joints 3 2 and 3 3 which are engaged with each other are formed inward. 3 2, 3 3 The asymmetric U-shaped steel sheet piles are configured as two back-laminated, integrated by welding. As for the adjacent box-shaped steel sheet piles 3 1 ′, the steel walls A having a double-walled structure having a closed space B on the inside are gradually formed while the joints 3 2, 3 3 at both ends are fitted together. The method of draining or automatically welding the soil and sand and / or water in the closed space B is the same as that in the embodiment of FIG. 15 ° FIG. 17 shows the steel constituting the steel wall A, and the asymmetric U is used. Another example is the case of the box-shaped steel sheet pile 3 1 ”with double-layered steel sheet piles. The box-shaped steel sheet pile 3 Γ in FIG. 16 is an asymmetric U-shaped steel sheet pile arranged in two pieces facing away from each other. "Integrated by welding", but the box-shaped steel sheet pile 3 1 in Fig. 17 is "H" which is used to weld the 3 a c of the asymmetric U-shaped steel sheet piles that are placed on the back side and bonded together. The shape steel is integrated to increase the section rigidity. That is, the section rigidity is increased by increasing the length of the steel connecting the asymmetric U-shaped steel sheet piles to each other. The occurrence of welding deformation can be reduced to make it easier to make. -38- (35) 200416329 Figure 18 shows the steel constituting the steel wall A of the present invention, using a box-shaped steel plate in which linear steel sheet piles are arranged in two layers. Another embodiment of the case of the pile 41, in this case, a two-claw type linear type of double-layer arrangement The steel sheet pile and the thick plate-like connecting steel 4 c connecting these are integrated by welding. Fig. 19 shows the steel constituting the steel wall A, and the flanges of the steel with a cross section are provided at both ends. An example of the case of a box-shaped steel sheet pile 4 1 ′ having a slotted tubular female joint and a male joint fitted thereto.

Similarly, FIG. 20 shows the steel constituting the steel wall A, which is combined with two U-shaped steel sheet piles that are arranged to face each other and welded together to connect the steel 4 1 c. The integrated steel sheet pile 4 1 ”and the ordinary An example of the case where the joints of the U-shaped steel sheet pile U "are mutually connected. However, in the above-mentioned embodiments of FIGS. 15 to 20, a plurality of box-shaped steel sheet piles are welded on land to form elements in advance, and those punched connections may be used. Fig. 21 shows an example of the construction procedure of the asymmetric U-shape in the vicinity of the joint as shown in Fig. 22 with a flowchart. For steel materials with flat sections, steel sheet pile 1 will be used. It will be suitable for land use. The following procedure will be used. (1) According to the construction capacity and number of steel sheet pile punching machines, At one place, the construction of the steel wall A (one heavy wall) of the steel sheet pile 1 is started (Fig. 21a). At this time, it is generally punched until the lower end of the steel sheet pile 1 reaches the water blocking layer. (2) The vicinity of the joint portion J of the steel wall A is excavated to a water-shielding layer, and the closed space of the closed area B is ensured by draining the sand or water. The size of this closed -39- (36) 200416329 area B may be any size (horizontal area x vertical depth) that can ensure the embedding of the water-proof profile 51 and the subsequent welding operation. However, at this time, it is not necessary to completely drain the water in the closed area B. (3) Next, cover the joint 2 of the steel sheet pile 1 punched by (1).

3. Engage the lip groove-shaped steel of the water stop profile 51 with the locking portion 1 r of the flat portion 4 provided near the joints 2 and 3 of the steel sheet pile 1 and insert it into the closed area B ( Figure 21 c). If necessary, wash into the soil. (4) Thereafter, in order to prevent water stagnation in the joint water-stopping area C surrounded by the water-stop profile 51 and the steel sheet pile 1 from entering the closed area B, the stagnation in the joint water-stopping area C is prevented. The water in it is continuously discharged by a pump or the like (Fig. 21d). Alternatively, in order to prevent water from penetrating through the joint portion J from outside the closed area B, a filling material such as plaster is put into the joint water-stopping area C surrounded by the water-stopping profile 51 and the steel sheet pile 1 (second 1 Figure df). Furthermore, with the input of the filler material, it was confirmed that no water penetrated from the joint water-stopping area f C into the upper-closed area B. Specifically, it is sufficient to confirm the change of the water level in the closed area b. (5) Then, in each closed area B provided near the joint portion J of the steel sheet pile 1, the internal water (including soil and sand depending on the situation) is drained by a pump or the like (FIG. 21E). However, in the case of the process of (4), it is also possible to implement the process of (5) in parallel. (6) Confirm that no water has penetrated into the closed area b from the outside, and weld the gap between the above-mentioned water-proofing profile 51 and the steel sheet pile 1 by an automatic welding machine (No. -40- (37) (37) 200416329 21 Figure f) . Symbols 7 in Figs. 23 (a) to (d) are welding portions. Fig. 23 shows an example of the shape of the water-stopping profile 51 which constitutes the joint portion of the steel material covering the steel wall A. Fig. 23 (a) shows a case of a generally lip grooved steel. Fig. 2 (c) is a case of a lip grooved steel with a lip portion 5 lr1 outward, and Fig. 23 (b) is a net portion with a lip grooved steel which is a special shape with a mountain shape. Love of Lip Shape

In addition, although not shown, a circular or semicircular shape may be used. Fig. 23 (d) is a profile for water-stopping. In the vicinity of the joints 2 and 3 of the steel materials that are connected to each other, the gable steels 5 1 ′ and 5 1 ”are welded in advance, and the gable steel 5 is punched by the steel. In the case where the leading ends of 1 ′, 5 1 ”are superimposed, a joint water stop area C is formed on the inside. In this case, in the closed area B, the overlapping portions of the gables 5 1 ′, 5 1 ″, which are shaped as water-stopping profiles, are continuously welded in the longitudinal direction without gaps, and the water can be completely shielded. In the overlapping portion f of the gable steel 5 Γ, 5 1 ″, a water-proof sealing material may be interposed as necessary. The water-proof sealing material can be, for example, a water-proof rubber or a water-swellable resin coating. FIG. 24 shows another example of the steel material of the asymmetric U-shaped steel sheet pile 1, which is characterized in that the left and right joints 2, 3 each have an inner claw (inward protrusion 2a) and an outer claw (outward) The double claw formed by the protrusion 3 c). However, the heights of the protrusions 2a and 3c (inner and outer claws) in the figure are -41-(38) (38) 200416329 if they can be restrained to rotate and the joints 2 and 3 'are easily separated from each other. It can also be lowered at the height shown. Moreover, as for the positions of the flat portions 4 of the joints 2 and 3 ', even if the lower end of the inward joint 2b and the uppermost end of the outward joint 2a are not as shown, as long as the fitting of the joints 2 and 3' is not The obstruction is sufficient. FIG. 25 is an example of a steel wall showing items 11 and 12 of the scope of patent application. The asymmetric U-shaped steel sheet piles 1 with asymmetric joints 2 and 3 are connected in a row, and the welded joints are embedded. The joint part forms a steel wall A. In this example, an inward protrusion 2a for restricting the rotation of the joint portion is formed at the base portion on the inward joint 2 side of the asymmetric U-shaped steel sheet pile 1, and an inward protrusion is formed on the base portion on the outward joint 3 side.的 起 部 部 3 a。 The rising portion 3 a. The inward joint 2 and the outward joint 3 are engaged, and a plurality of steel sheet piles 1 are connected, and the outer side surface 3b on the outward joint 3 side and the protrusion 2a on the inward joint 2 side are continuously welded without gap in the longitudinal direction. , So that the steel wall A can have a high water barrier. The construction method of the steel wall A is to insert the steel sheet piles 1 into the joints 2 and 3 in the water and / or the ground, and then weld the joints 2 and 3. A plurality of steel sheet piles 1 are previously connected by a joint portion and welded together to prepare a plurality of pieces. After fitting the joints 2 and 3 and flushing them into the water and / or the ground, a method of welding the joints 2 and 3 may be used. This steel wall A has asymmetric joints 2, 3 as shown in Fig. 26 (Fig. 26 (a) is a plan view showing a state in which a plurality of steel sheet piles 1 are connected by a joint part, and Fig. 2 6 Figure (b) is an enlarged view of the joint fitting portion) The characteristics of the joint shape of the steel sheet pile 1 'The applicant is a left-right asymmetry of -42- (39) (39) 200416329 as shown in Fig. 26 The joints of the joints 2 and 3 will be continuously welded in the longitudinal direction of the steel sheet pile 1 between the outer side 3 b of the outer joint 3 and the inward protrusion 2 a as shown in FIG. Between the rising portion 3 a protruding inwardly at the base of the outward joint 3 side and the outer side 2 b of the inward joint 2 as shown in FIG. 28, the length of the steel sheet pile 1 is continuously drawn. Comparing the two cases, the following knowledge can be obtained. Then, the welding is stable, as shown in Fig. 2 (a), between the outer side 3a of the outer joint 3 and the inward projection 2a, a gap-free welding bead is relatively easy to form, and this can be obtained. Partial water blocking. On the one hand, the welding of the latter is unstable, as shown in Fig. 28 (b) and Fig. 28 (c), the rising portion 3a protruding inward at the base of the outward joint 3 side, or in the direction of the Any one of the outer side surfaces 2b of the inner joint 2 is welded in a state where the welding arc is deviated, and a raised welding bead 5a, 5b is formed in any of the above. Therefore, in the case of continuous welding of the steel sheet pile 1 in the longitudinal direction, if the welding speed is not lowered sufficiently compared with the former, the base portion on the outward joint 3 side inwardly projects with the projecting rising portion 3 a and It is difficult to form a weld bead without gaps between the outer side faces 2b of the inward joint 2 and have water-shielding properties. In addition, the shape of the welding bead is a shape that protrudes relatively large compared to the former. The reason for this phenomenon is that in the former case, the opening angle formed by the outer side 3 b of the outer joint 3 and the inward protrusion 2 a is an acute angle (9 0 ° in Fig. 7 (a)). (Unfilled), in the latter case, 'the base on the side of the outward joint 3 is the rising part 3 a protruding inward and is formed by the outer side 2b of the inward joint -43-(40) (40) 200416329 2 The opening angle of is the obtuse angle (greater than 90 °) as shown in Figure 2 8 (a). However, in the case of welding non-consumable electrode of TI G or plasma arc welding to the outer side 3 b of the outer joint 3 and the inward protrusion 2 a, the protrusion 2 a is melted without using a welding material. It may be welded to the outer surface 3 b, and the protrusions 2 a and the outer surface 3 b may be fused and integrated together (not shown). Fig. 29 shows another embodiment of the steel wall A of the 11th patent application scope. Similar to the case of the embodiment of Fig. 25, the asymmetric U-shape with asymmetric joints 2 and 3 will be shown. After the steel sheet piles 1 are connected in i rows, the joint fitting portions are welded to form a steel wall A. The difference from the embodiment of FIG. 25 is that in the embodiment of FIG. 29, the outward joint 3 side is also formed between the rising portion 3a and the protruding portion 3a for restricting the rotation of the joint portion. 3 c, in a state where these joints 2 and 3 are engaged, the outer side surface 3 b on the outward joint 3 side and the protrusion 2 a on the inward joint 2 side are welded continuously without gaps in the longitudinal direction. In this case, the welded portion may be between the outward projection 3 c and the inward projection 2 of the inward projection 2 in addition to the illustrated portion. In addition, in any of the embodiments of FIGS. 25 and 29, the protrusion 2a or the protrusion 3c can also restrict the rotation of the joint portion, and if the joints 2 and 3 are not easily separated from each other, for example, it is lower than the figure Those can also. Further, the positions of the flat portions 4 of the joints 2 and 3 are not the lowest end of the inward joint 2 and the uppermost end of the outward joint 3 as shown in the figure, as long as the positions of the joints 2 and 3 are not hindered. There is no special limit-44- (41) 200416329. Figure 30 (a), (b) shows the scope of patent application

An example of the steel wall of the item, these are asymmetric U-shaped steel plate branches 1 with asymmetric joints 2, 3 connected in two rows, and the asymmetric U-shaped steel plate piles 1 are the outermost of the sheet pile wall. In a state where the edges face each other inwardly, each joint fitting portion is welded to form a steel wall A. Figure 30 (a) shows the sheet pile walls in two rows approaching each other, and Figure 30 (b) shows the sheet pile walls in two rows are separated from each other. Generally, the steel wall is constructed by flushing each row into the water and / or the ground individually. If possible, the steel walls of the two rows can be flushed simultaneously while being separated from each other. The characteristic of this case is that the opposing steel walls that are flushed into the water and / or the ground form a closed space that is isolated from the outside in two rows, so the part that is punched into the ground is excavated to eliminate joint fitting. And the surrounding sand and sand, and subsequent welding of the joint fitting portion can be easily performed. In addition, after the water-shielding treatment, the closed space is blocked from the outside, so it can be used for monitoring or repairing the welded part of the joint. Figures 31 (a) and (b) are other examples of the steel wall A that shows item 13 of the scope of the patent application. These are two asymmetry with two asymmetric joints 3 2, 3 3 In the state where the U-shaped steel sheet piles face each other inwardly with respect to the outermost edges of the sheet pile wall, they are directly welded or welded through a steel plate or a steel-shaped steel and the like. A steel wall A having excellent water-shielding properties is formed. Figure 31 (a) is a box type in which two asymmetric U-shaped steel sheet piles are directly welded and integrated with each other. • 45- (42) (42) 200416329 Sheet pile 3 1 ', Figure 31 (b ) Is a case of a box-shaped steel sheet pile 3 1 ″ integrated by welding of a steel bar 3 1 c with a grate-shaped steel. The characteristic of this case is that two steel sheets piled in the water and / or the ground at the same time. Therefore, in addition to the improvement of the construction (punching) energy efficiency, the distance between the steel sheet piles 1 after being washed into the water and / or in the ground can be kept fixed, so it is suitable for the introduction of the mobile welding machine as shown in Figure 34. In addition, the efficiency of the welding construction of the joint fitting portion can be achieved. In addition, as in the case of the embodiment shown in FIG. 30, since a closed space is formed to be isolated from the outside of the g, it is possible to control the portion that is flushed into the ground. Cutting and removing the dirt and sand in the joint fitting portion and its surroundings can facilitate the subsequent welding construction of the joint fitting portion. Moreover, after the water blocking treatment, the closed space is blocked from the outside, so it can be used for the joint. The application of monitoring or repairing the welding part. In the other embodiment of the steel wall A of the thirteenth range, the two straight steel sheet piles having the asymmetric joint of the flange portion 3 1 f face each other inwardly with respect to the outermost edges of the sheet pile wall. f In the form of facing, the box-shaped steel sheet pile 31 integrated with the steel plate passing through the mesh portion 3 1 w is connected in a row, and the joint fitting portion is welded to form a steel wall A. In this case, it is also the same as the first 3 1 In the example shown in the figure, the water and / or ground penetration into the steel sheet pile is performed substantially at the same time, so the construction (punching) energy efficiency is improved, because the water and / or ground The distance between the steel sheet piles after the punching is kept constant, so it is suitable for the introduction of a mobile welding machine as shown in Fig. 34, and the welding construction of the joint fitting -46- (43) (43) 200416329 can be achieved. In addition, because a closed space is formed to be isolated from the outside world, a portion that is punched into the ground is excavated, and the dirt and sand in the joint fitting portion and its peripheral portion can be eliminated to make the subsequent joint fitting portion Welding construction becomes easy. After the water blocking treatment, the closed space is It is cut off from the outside world, so it can be used for monitoring or repairing the welding part of the joint. However, the welding construction method of the above embodiment is shown in Figure 33 or Figure 34 in the longitudinal direction of the steel sheet pile. It is best to use an automatic welding robotic arm for mobile welding machines 8 and 9 that continuously perform welding at a predetermined position by a predetermined welding speed. It is more efficient in terms of construction efficiency, but welding by manual intervention is also possible. However, In Fig. 33, symbol 8a is a welding torch, 8b is a walking rail, 8c is a walking roller, and in Fig. 34, symbol 9a is a welding torch, and 9b is a conductive for adjusting the interval between welding machines. Bow, 9c is a positioning and walking roller. In addition, for the welding using the joint fitting portion of the mobile welding machine illustrated in FIG. 33 or FIG. 34, in order to eliminate foreign matters such as soil and sand embedded in the fitting portion, it is desirable to use water or It is a function of sweeping the welding position such as air. An example of the steel sheet piles of the “Secretary of the United States of America” patent No. 14 and the scope of patent application No. 15 is an example of an asymmetric U-shaped steel sheet pile 1 with asymmetric joints 2 and 3 After joining in one row, the joint fitting portion was welded to form a steel wall A. In this example, the base J on the inward joint 2 side of the asymmetric U-shaped steel sheet pile 1 -47- (44) (44) 200416329 forms an inward protrusion 2 a, and the base on the outward joint 3 side A rising portion 3a protruding inward is formed. A part or all of the inward protrusion 2a is made of a material 5 c having a lower melting point than the other parts. The inward joint 2 and the outward joint 3 are engaged and a plurality of steel sheet piles 1 are connected. The outer side surface 3 b on the outer joint 3 side and the protrusion 2 a on the inward joint 2 side are continuously welded in the longitudinal direction without a gap, so that the steel wall A has a high water-shielding property. The construction method of the steel wall A is to construct the joints 2 and 3 of the steel sheet g pile 1 one by one in the water and / or in the ground. The method of joining the joints 2 and 3 is also possible. A plurality of steel sheet piles 1 are previously connected and joined by a joint portion, and the joints 2 and 3 are fitted into the water and / or the ground while being fitted, and then the joints 2 and 3 may be joined. The steel sheet pile 'in the scope of patent application No. 14 and the patent scope in the scope of patent application No. 15 also has the shape characteristics of the joint of the steel sheet pile 1 of the asymmetric joints 2, 3 shown in FIG. 26. The applicant, It is the fitting part of the left and right asymmetric joints 2 and 3 as shown in FIG. 26. In order to continuously extend the outer side 3b of the outer joint 3 and the inward protrusion 2a in the longitudinal direction of the steel sheet pile 1, A case in which the inward protrusion 2 a is joined with a gap, and almost the entirety of the inward protrusion 2 a is formed of a material 5 c having a lower melting point than the other parts of the steel sheet pile 1 (FIG. 35 (b)), and the inward protrusion 2 When the other parts of a steel sheet pile 1 are made of the same material (Fig. 38 (a)), the following knowledge can be obtained. However, at this time, the heating means is a non-consumable electrode type gas-tight -48- (45) (45) 200416329 plasma arc welding device, which is one of the arc welding methods. Method of heating. The former (figure 3 and 5) is to melt the bonding material (low melting point material 5 c) before the base material begins to melt. It is easier to make the joint between the outer side 3 b of the outer joint 3 and the inward protrusion 2 a. The material is filled without gaps and has water-blocking properties. On the other hand, in the latter (Fig. 38), the inward protrusion 2a and the base material are the same material (steel material). Because the melting point of the protrusion is high, the distance between the protrusion 2a and the direction of the arc for heating will make the The melting state of the protrusion 2a is changed, as shown in FIG. 38 (b), and a poorly jointed portion (formed between the outer side 3b of the outer joint 3 and the inward protrusion 2a is formed depending on the position of the joint in the longitudinal direction). The extent to which water can penetrate). Alternatively, depending on the direction of the arc, the distance of the protrusion 2a, or the amount of heat input, although not shown, the problem may occur that the root portion of the inward protrusion 2a is cut or the portion of the outer joint 3 is chipped. Therefore, in the case of continuous joining of the steel sheet piles 1 in the longitudinal direction, it is necessary to accurately maintain the position and angle of the arc, and to adjust the heat input appropriately. The joining speed is not reduced to be significantly lower than the former (Figure 35). To the extent that the above-mentioned problems in joining cannot be avoided, it is very difficult to join the outer surface 3b of the outer joint 3 and the inward protrusion 2a with water-shielding without gaps. The above is explained based on the results of joint bonding experiments in the atmosphere. 'However, compared with the atmosphere, in water, the molten member is easily solidified because it absorbs heat from the surrounding water. In order to melt the protrusion of the bonding material, it must be -49. -(46) (46) 200416329 It is necessary to increase the heat input of the heating arc. In the case where a part or all of the protrusions are not used with a low-melting point material, when joints are joined in water, problems such as opening holes in the flanges of steel sheet piles or chipping the joints are easy to occur. Steel sheet piles are best joined in water. Figures 3 and 6 show other embodiments. Only the outer side 3 b of the outward joint 3 and the inward protrusion 2 a are formed when a part of the inward protrusion 2 a is formed of a low melting point material 5 c. Before and after joining. In the embodiment shown in FIG. 36, for the inward protrusion 2a, although only the side opposite to the outward joint 3 is formed of a low melting point material 5c, for example, the upper portion of the inward protrusion 2a It is also possible that a fraction is formed by the low melting point material 5c. However, as shown in Fig. 3 (a), the method of integrating the low-melting point material 5c inward protrusion 2a is a method of bonding, or after the hot rolling of the steel sheet pile 1 is completed. A method of casting the low-melting-point material 5c into a predetermined shape at a predetermined position at a suitable base material temperature, followed by cooling and hardening. Fig. 37 shows another method of replacing ~ part of the inward protrusion 2a with the low melting point material 5c. The low melting point material 5c (hot melt material) is prepared in advance to form the inward protrusion 2a. For a part or all of the shapes, the steel sheet pile of the base material is also formed so that the inward protrusion 2 can be fitted in a pill box structure, for example, and the two can be fitted and integrated. It is also possible to apply a bonding agent to the mating surface 'in advance, or to fix the two with a bolt (not shown) after fitting the two. -50- (47) (47) 200416329 Figures 3 and 9 show other embodiments of the steel sheet piles in the scope of application for patents No. 14 in the present application, as in the case of the embodiment of Figures 35 and 5, After the asymmetric U-shaped steel sheet piles Γ of the symmetrical joints 2 and 3 are connected in a row, the joint fitting portion is welded to form a steel wall A. Different from the embodiment of Fig. 35, in the embodiment of Fig. 39, the outward joint 3 side is also formed between the rising portion 3a and the rising portion 3a. In the state of the joints 2 and 3, the outer side surface 3b on the outward joint 3 side and the protrusion 2a on the inward joint 2 side are welded continuously and without gaps in the longitudinal direction. In this case, the welding place may be between the outward protrusion 3 c and the outward side 2 b of the inward protrusion 2, except for the portion shown in the figure. In this case, part or all of the outward protrusion 3 c may be formed by Part of the low melting point material 5c. Moreover, the embodiment of FIG. 39 is also the same deformation form as that of FIGS. 36 and 37 of the embodiment of FIG. 35, that is, for the outward protrusion 3c, only the The opposite side of the joint 3 is formed of a low melting point material, or a portion of the lower protrusion 3 c in the figure is formed of a low melting point material, or a low melting point material is prepared to form an outward protrusion in advance For part or all of 3e, the steel sheet pile of the base material may be formed. The above-mentioned outward protrusion 3c is a deformed form in which the structure is fitted with a pill box, for example, and the two are integrated. In addition, in any of the embodiments of FIGS. 35 and 39, the protrusion 2a or the protrusion 3c can also restrict the rotation of the joint portion, and as long as it is not easy to disengage each other, for example, It can be lower than the figure. -51-(48) 200416329 Further, the position of the flat part 4 of the joints 2 and 3 is not only the lower end of the inward joint 2 and the upper end of the outward joint 3 as shown in the figure. There is no particular limitation on the position where the fitting of the slab is not hindered.

In the embodiment of FIG. 40, after the asymmetric U-shaped steel sheet piles 1 having asymmetric joints 2 and 3 are connected in two rows, the asymmetric u-shaped steel sheet piles 1 are mutually opposed to the outermost edges of the sheet pile wall. In the state facing inward, the joint fitting portions are joined together to form a steel wall A. Figure 40 (a) shows that the sheet pile walls of the two rows are close to each other, and Figure 40 (b) shows that the sheet pile walls of the two rows are separated from each other. Generally, the steel wall is constructed by arranging the columns in water and / or the ground separately. If possible, the steel walls in two rows can be simultaneously constructed while being separated from each other. The characteristic of this case is that the closed space that is isolated from the outside is formed on the oppositely facing steel walls that are arranged in two rows in the water and / or the ground. The soil and sand in the joint and its surroundings can facilitate subsequent joint construction work of the joint fitting portion. In addition, after the water blocking treatment, the closed space is cut off from the outside, so it can be used for monitoring or repairing joint joints. Figure 41 (a) and (b) show other embodiments. These are two asymmetric U-shaped steel sheet piles with asymmetric joints 2, 3 and the outermost edges of the sheet pile walls. In a state of facing inward, the box-shaped steel sheet piles integrated by direct welding or steel welding such as steel plates or stell-shaped steels are connected in a row, and the joint fitting portion will be joined to form -52- (49) (49) 200416329 Steel wall A with excellent water barrier. Figure 41 (a) is a case where two asymmetric U-shaped steel sheet piles are directly welded and integrated into a box-shaped steel sheet pile 3 Γ, and Figure 41 (b) is a case where steel 3 3 c will pass through. In the case of integrated box-shaped steel sheet pile 3 1 " The characteristic of this case is that the construction of the steel sheet piles in the water and / or the ground is carried out substantially simultaneously at the same time, so the construction (punching) energy efficiency is improved, and the steel sheet piles in the water and / or the ground are installed. Since the distance between them can be kept fixed, it is suitable for the introduction of the mobile joining machine 8 'as shown in FIG. 43, and the joining construction of the joint fitting portion can be made more efficient. In addition, as in the case of the embodiment of FIG. 40, since a closed space isolated from the outside is formed, by digging a part constructed in the ground, the soil and sand in the joint fitting portion and its peripheral portion are excluded, and The subsequent joint construction of the joint fitting portion can be facilitated. In addition, after the water blocking treatment, the closed space is cut off from the outside, so it can be used for monitoring or repairing joint joints. FIG. 42 shows another embodiment in which two linear steel sheet piles having asymmetric joints with flange portions 31 f ♦ face each other inwardly with the outermost edges of the sheet pile walls, The box-shaped steel sheet pile 31 integrated by welding the steel plates through the mesh portion 31 w is connected in a row, and then the joint fitting portion is joined to form a steel wall A. In this case, as in the case of the embodiment shown in FIG. 41, the construction of the steel sheet pile in the water and / or the ground is performed substantially at the same time. Therefore, S also works (punched) to improve the efficiency. 'Because the distance between the steel sheet piles installed in the water and / or the ground can be kept fixed, it is suitable for the introduction of the mobile joining machine 8 as shown in Figure 43 -53- (50) 200416329, and the joint fitting part can be achieved. Efficiency of joint construction. In addition, since a closed space is formed to be isolated from the outside, by digging a part to be constructed in the ground and excluding soil and sand from the joint fitting portion and its peripheral portion, the subsequent joint construction of the joint fitting portion can be performed. easily. In addition, after the water blocking treatment, the closed space is cut off from the outside, so it can be used for monitoring or repairing joint joints. However, the welding construction method of the above embodiment, as shown in FIG. 43 or FIG. 44, is a mobile welding machine that continuously welds a predetermined position by a predetermined welding speed in the longitudinal direction of the steel sheet pile. 8 ', 9', it is best to use an automatic welding robot arm, which is more efficient in terms of construction energy efficiency, but manual welding can also be used.

In addition, for welding using the joint fitting portion of the mobile welding machine illustrated in FIG. 43 or 44, in order to eliminate foreign matter such as soil and sand embedded in the fitting portion, it is desirable to use water or air before welding. Wait for the function of sweeping the welding position. [Brief description of the drawings] [Fig. 1] An example of the construction procedure of the invention (corresponding to item 1 of the scope of patent application) of the present invention when using steel sheet piles with jointed steel and temporary steel is shown in a flowchart. . [Fig. 2] A plan view of an embodiment in the case where the steel material constituting the steel wall is a U-shaped steel sheet pile in item 1 of the scope of patent application. [Figure 3] In the first item of the scope of patent application, the steel constituting the steel wall is a plan view of an embodiment when the material is an asymmetric U-shaped steel sheet pile. [Fig. 4] In the first item of the scope of patent application, a plan view of an embodiment when the steel material constituting the steel wall is a steel material in which a corrugated steel and an asymmetric U-shaped steel sheet pile are used. [Fig. 5] A plan view of an embodiment in a case where a steel plate constituting a steel wall is a straight steel sheet pile and a shielding member is used (corresponding to item 2 of the scope of patent application). [Fig. 6] An example of a construction procedure of the invention (corresponding to item 3 of the scope of patent application) of the present invention (corresponding to item 3 of the scope of patent application) using box-shaped steel sheet piles for steel materials having joints is shown in a flowchart. [Fig. 7] In item 3 of the scope of patent application, the steel material constituting the steel wall is a plan view of an embodiment when a box-shaped steel sheet pile in which a linear steel sheet pile is arranged in two layers is used. [Fig. 8] In item 3 of the scope of patent application, the steel material constituting the steel wall is a plan view of an embodiment in which a box-shaped steel sheet pile in which an asymmetric U-shaped steel sheet pile is double-layered is used. [Fig. 9] In item 3 of the scope of patent application, the steel material constituting the steel wall is a plan view of another embodiment when a box-shaped steel sheet pile in which an asymmetric U-shaped steel sheet pile is double-layered is used. [Fig. 10] In item 3 of the scope of patent application, the steel constituting the steel wall is a plan view of an embodiment when U-shaped steel sheet piles are arranged in two layers. [FIG. 11] A plan view of an embodiment in which a sheet-like long member is provided outside the joint portion. -55- (52) (52) 200416329 Increasing the water stopping property. [Fig. 12] A plan view of an example of a case where a rod-shaped long member is provided inside the joint portion to improve the water stopping property. [Fig. 13] A plan view of another embodiment in the case where a rod-shaped long member is provided inside the joint portion to improve the water stopping property. [Fig. 14] An essential flowchart of a method for manufacturing a steel wall according to items 8 and 10 of the scope of patent application in this case. [Figure 15] An example of the steel wall of the scope of application for patents Nos. 5 to 7 of the present application, (a) is a plan view, and (b) is a detailed enlarged sectional view of the main part. [Fig. 16] A plan view of another embodiment of the steel wall of the scope of claims 5 to 7 of the present application. [Fig. 17] A plan view of another embodiment of a steel wall of the scope of claims 5 to 7 of the present application. [Fig. 18] A plan view of another embodiment of a steel wall of the scope of claims 5 to 7 of the present application. [FIG. 19] A plan view of another embodiment of the steel wall according to items 5 to 7 of the scope of patent application of the present application. [Fig. 20] A plan view of another embodiment of a steel wall of the scope of claims 5 to 7 of the present application. [Fig. 21] An essential flow chart of a method for manufacturing a steel wall in the scope of claims 9 and 10 of the present application. [Fig. 22] A flat-56- (53) (53) 200416329 plan view of the positional relationship between the steel wall body and the closed area according to an embodiment of the method for manufacturing a steel wall in the ninth patent application scope of the present application. [Fig. 23] (a) to (d) are horizontal cross-sectional views of an example of using the water-stopping profile of the present invention and its automatic welding position. [Fig. 24] (a) is a plan view of another example of a steel sheet pile of a steel material used in the present invention, and (b) is an enlarged view of a joint portion thereof. [Fig. 25] An embodiment of the sheet pile type steel wall according to items 11 and 12 of the scope of patent application in this case, (a) is a plan view, and (b) is an enlarged view of a joint fitting portion thereof. [Fig. 26] (a) is a plan view showing a state where a plurality of steel sheet piles having asymmetric joints to be applied are connected to the joint portion, and (b) is an enlarged view of the joint fitting portion. [Fig. 27] An explanatory diagram of a case where the welding method of the items 11 and 12 of the scope of patent application is to continuously weld between the outer surface of the outer joint and the protrusion in the inner direction in the longitudinal direction of the steel sheet pile. [Fig. 28] In the case of the welding method of the problem of the comparative example, when the base on the joint side in the outer direction is protruded from the upper portion in the inner direction and the outer surface of the joint in the inner direction is continuously welded in the longitudinal direction of the steel sheet pile Illustrating. [Fig. 29] In the sheet pile-type steel wall according to the eleventh aspect of the patent application, (a) is a plan view and (b) is an enlarged view of a joint fitting portion. [Fig. 30] An example of sheet pile steel wall of item 13 of the scope of application for patent, (a) is a case where two rows of sheet pile walls are close to each other, and (b) is a two row sheet pile The walls are separated from each other. -57- (54) (54) 200416329 [Fig. 31] A plan view of another embodiment of a sheet pile steel wall in the scope of patent application No. 13 (a) is a U-shaped steel sheet pile of 2 pieces In the case where they are directly welded and integrated with each other, (b) is a case where they are welded and integrated through a stell-shaped steel. [Fig. 32] A plan view of another embodiment of the sheet pile steel wall of the 13th patent application scope. [Fig. 33] A plan view of an example of a welding method using a joint fitting portion of a mobile welding machine. [Fig. 34] A plan view of another example of a welding method using a joint fitting portion of a mobile welding machine. [FIG. 35] An embodiment of the steel sheet piles in the scope of the application for patents Nos. 14 and 15 of the present application, (a) is a plan view of a state in which steel sheet piles with asymmetric joints are connected, (b), (c ) It is the main part enlarged view of the state of the joint. [Fig. 36] (a) and (b) are plan views of main parts of other embodiments of the steel sheet metal plate related to the patent application Nos. 14 and 15. [Fig. 37] (a) and (b) are explanatory diagrams of an example of a method of replacing a part of the protrusion in the inner direction with a low melting point material. [Fig. 38] (a) and (b) are explanatory diagrams of the problematic joining state of the comparative example. [Fig. 39] In another embodiment of the steel sheet piles in the scope of claims Nos. 14 and 15 of the scope of patent application of this application, (a) is a plan view of a state in which steel sheet piles having asymmetric joints are connected, (b), ( c) -58- (55) 200416329 shows the enlarged view of the main part. [Fig. 40] A plan view of an embodiment of a steel wall of a steel sheet pile of the items 14 and 15 of the patent application table (a) is a case where the wall of the sheet piles of two rows are close to each other, (b) It is the case where the sheet pile walls of two rows are separated from each other.

[FIG. 41] Plan view of another embodiment of a steel wall of a steel sheet pile of the scope of patent applications Nos. 14 and 15 '(a) is a direct welding of two asymmetric U-shaped steel sheet piles to each other In the case of integration, (b) is the case of integration through welding of grate steel. [Fig. 42] A plan view of another embodiment of a steel wall of a steel sheet pile in the scope of patent applications Nos. 14 and 15. [Fig. 43] A plan view of an example of a joining method using a joint fitting portion of a mobile joining machine. [Fig. 44] A plan view of another example of a joining method using a joint fitting portion of a mobile joining machine.

[Fig. 45] A horizontal sectional view of an example of a water retaining wall using a conventional U-shaped steel sheet pile. [Fig. 46] A plan view showing an example of a water retaining wall using a conventional steel pipe sheet pile. [Illustration of drawing number] A steel wall B closed area C joint water stop area D temporary steel wall 59- (56) (56) 200416329 J welding target joint part j joint part (temporary joint of steel sheet pile s 1 Sheet-shaped long member s2 Rod-shaped long member 1 Asymmetric U-shaped steel sheet pile 1 'Asymmetric U-shaped steel sheet pile 1 C Connecting steel 1 r Locking portion 11 Temporary steel sheet pile 2 Inward joint 2a Protrudes inward 2b Outer side 3 Outer joint 3 'Joint 3 a Rising part 3 b Outer side 3 c Outward protrusion 4 Flat part 5 Welding 5 a, 5 b Welding bead 5 c Low melting point material 5 d Welding 6 Welding part 7 Welding section-60- (57) 200416329 7 'Welding section 8, 9 mobile welding machine 8' Mobile splicing machine 8 ', 9' mobile splicing machine 8 a welding torch 8 b walking track 8 c walking roller

9 Mobile welding machine 9 ’Mobile welding machine 9a Welding torch 9 a’ Welding torch 9b Conductive bow for adjusting the interval between welding machines 9c Roller for positioning and walking 11 U-shaped steel sheet pile 1 1 ”U-shaped steel sheet pile

lit Temporary steel sheet pile 2 1 Straight steel sheet pile 2 1c Connecting steel 2 1s Shelter member 2 It Temporary steel sheet pile 3 1 Box steel sheet pile 3 1 f Box steel sheet pile 3 1, Box steel sheet spring 3 1c Connecting steel -61-(58) 200416329 3 1 f flange part 3 1 r locking part 3 1 w mesh part 3 2, 3 3 asymmetric joint 3 4 flat part 3 6 locking part

4 1 box-shaped steel sheet pile 4 Γ box-shaped steel sheet pile 4 1 ”steel sheet pile 4 1 c connected steel 5 1 water-proof profile (with lip groove steel) 5 Γ, 5 1” mountain-shaped steel 5 1 r lip Part 5 lr 'outward lip part 5 2, 5 3 Profile for waterproofing (mountain-shaped steel)

6 1 U-shaped steel sheet pile 62 joint 63 water wall structure 64 joint 6 5 site improvement 7 1 steel pipe sheet pile 72 male joint material 73 female joint material 74 > 75 wing-62- (59) 200416329 75 wing 7 5 a Foot 76 Fusion -63

Claims (1)

(1) (1) 200416329 Patent application scope 1. A method for manufacturing a steel wall, a method for manufacturing a steel wall that connects a plurality of steels with joints at both ends to each other, characterized in that the aforementioned steel is The joints are fitted and punched together to form part or all of the steel wall, and the temporary steel is punched on the side of the steel wall to form a temporary steel wall. The steel wall and the temporary wall are removed. For the soil and sand in the area held by the steel wall, the joint portion of the steel wall is washed, and then the joint portion is automatically welded. 2. The manufacturing method of the steel wall according to item 1 of the scope of patent application, wherein between the aforementioned steel wall and the aforementioned temporary steel wall, or between the aforementioned steel wall and the aforementioned provisional steel wall A shielding member for preventing soil and sand from entering the aforementioned area is provided to form the aforementioned area. 3. A method for manufacturing a steel wall, a method for manufacturing a steel wall that connects a plurality of steel materials having joints at both ends to each other, characterized in that the aforementioned joints of the foregoing steel materials are fitted and punched together to form a closed inner side. After the steel wall of the double-walled structure in the field is removed from the sand and / or moisture in the closed field, the joint portion of the steel wall is automatically welded. 4. The manufacturing method of the steel wall as described in the third item of the patent application scope, wherein the upper layer of the sand and / or moisture is removed by the water-shielding layer existing in the closed area and automatically welded to the bottom of the water surface. . 5. A steel wall, a plurality of steels having joints at both ends are steel walls connected by the aforementioned joints with each other, characterized in that the joint portion is covered with a steel water-proof profile, and the aforementioned water-proof The shape material and the steel material and / or the water-proof shape material are continuously welded to each other without a gap in the longitudinal direction. -64- (2) (2) 200416329 6. For the steel wall of the scope of application for item 5, in which the water-stop profile is a joint that covers the joint, is engaged or welded to the steel. nearby. 7. For the steel wall of item 5 or 6 of the scope of the patent application, in which the previously connected steel is washed into water and / or into the ground. 8. A method for manufacturing a steel wall, a method for manufacturing a steel wall that connects a plurality of steel materials having joints at both ends to each other, wherein the steel material is formed by fitting and fitting the joints to each other, and forming the inner surface with The steel wall of the double-walled structure of the closed area is covered with a steel water-stop profile by removing the closed area side of the joint, and the sand and / or moisture existing in the closed area is removed. The waterproof material and the steel material or the waterproof material that cover the joint are continuously welded without gaps in the longitudinal direction by automatic welding. 9. A method for manufacturing a steel wall, a method for manufacturing a steel wall that connects a plurality of steel materials having joints at both ends to each other, wherein the steel material is formed by fitting and punching the joints to each other to form a steel wall. Then, the earth and sand near the joint of the steel wall are excavated to a water-shielding layer to form a closed area, and the closed area side of the joint is covered with a water-stop profile to remove the existence of the closed area. The soil and sand and / or moisture in the inside are continuously welded to each other without gaps in the longitudinal direction by automatic welding to cover the water-resistant profile and the steel or water-resistant profile that cover the joint. 10. The method for manufacturing a steel wall according to item 8 or 9 of the scope of the patent application, wherein soil and sand and / or moisture existing in the closed area are removed to the upper part of the water-shielding layer. -65- (3) (3) 200416329 1 1. A sheet pile type steel wall, wherein a plurality of steel sheet piles having joints at both ends are connected to each other by a sheet pile type steel wall formed by the aforementioned joints, which is characterized by The steel sheet pile has a flat portion in the same direction as the punch line near the joints at the two ends, and the cross-sectional shape of the joints at the two ends is left-right asymmetric. One of the joints that engage with each other is for the flat The joint is formed inward, and the other side of the joint is a shape of the flat part. Further, the base of at least one of the joints has a protrusion, and a plurality of the steel sheet piles can be aligned in a state where the cross-sectional shapes of the steel sheet piles are aligned in the same direction. The steel sheet piles are connected linearly to each other, and the outer surfaces of the protrusions of the one joint and the other joint are continuously welded without gaps in the longitudinal direction. 1 2. A sheet pile type steel wall, a plurality of steel sheet piles with joints at both ends are sheet pile type steel walls connected by the aforementioned joints, and are characterized by: There is a flat part near the joint at the end, and the cross-section shape of the joint at the two ends is left-right asymmetric. One of the joints that engages with each other is formed inwardly of the flat part, and the other part of the joint is For the flat portion to be formed outwardly, the base portion on the joint side in the inner direction has an inward protrusion, and the base portion on the outer joint side has an inwardly raised portion, • 66-(4) (4) 200416329 In a state where the cross-sectional shapes of the steel sheet piles are aligned in the same direction, a plurality of steel sheet piles can be linearly connected to each other, and the outer side surfaces of the outward joints and the inward protrusions are continuous without a gap in the longitudinal direction. Welding. 13 3. The sheet pile type steel wall according to item 11 or 12 of the scope of patent application, wherein the plurality of steel sheet piles are two sheet pile walls connected by the joints at the two ends described above to each other. In a state where the connecting portions of the joints face each other inward, they are washed into the water and / or the ground. 14. A steel sheet pile having a steel sheet pile with joints at both ends is characterized in that there is a flat portion in the same direction as the punch line near the joints at the two ends, and the cross-sectional shape of the joints at the two ends is left-right asymmetric One of the joints that are engaged with each other is formed inwardly with respect to the flat portion, and the other of the joints is formed outwardly with respect to the flat portion. The base of at least one of the joints has a protrusion at the base thereof. In a state where the cross-sectional shapes are aligned in the same direction, a plurality of steel sheet piles can be linearly connected to each other, and a part or all of the protrusions are made of a material having a lower melting point than the other parts. 15. A steel sheet pile with steel sheet piles at both ends, characterized in that: near the joints at the two ends, there are flat portions in the same direction as the punching line, and the cross-sectional shape of the joints at the two ends is left and right. One side of the joint which is symmetrical and engages with each other is formed inwardly with respect to the flat portion. Ex. -67- (5) 200416329 The other side of the joint is formed outwards with respect to the flat portion. Inward protrusion ^ The inwardly rising portion is provided at the base portion on the outward joint side. 'In a state where the cross-sectional shapes of the steel sheet piles are aligned in the same direction, a plurality of steel sheet piles can be linearly connected to each other, and Some or all of the protrusions are made of a material with a lower melting point than other parts. -68-