JPH07224433A - Method and device for construction of water-cut screen - Google Patents

Abstract

PURPOSE:To enhance the efficiency of executing works of constructing a water- cut screen, ensure a high safety, suppress the costs, and perform works with high accuracy by providing possibility of continuous excavation of trench and continuous setting of seamless screen. CONSTITUTION:To a working face 12', continuous excavation of trench 1' is made using a saw type cutter 14, and an endless water-cut screen 9' of seamless type paid off from a bobbin 16 is fed with the aid of a guide bar 17 and set stretching in the longitudinal direction of the trench 1' upon a direction change at a right angle. Fluid type retaining bags 18, 18... are inserted into the trench 1' at a certain pitch to provide timbering so that collapse is prevented, and works of water-cut screen 9' are executed continuously. This enables continuous execution of works for trench and screen, prevents collapse, permits completion of accurate works within the specified term, ensures safety, suppresses the costs, and presents a large reliability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The disclosed technology belongs to the technical field of constructing an impermeable wall having an impervious screen such as a synthetic resin sheet in the ground.

[0002]

2. Description of the Related Art As is well known, the construction of facilities is indispensable for all industries, and the construction of such facilities is normally done on the ground except in special cases such as underwater, sea, or air. To that extent, the various conditions as the basis for the ground structure are of great importance.

[0003] As one of the conditions, the phenomenon of running water such as movement of groundwater in the ground is important not only for the structure but also for the strength and rigidity of the ground. It is important to construct a so-called impermeable wall, etc. in the ground to prevent movement of groundwater.Therefore, the set size is thin and the so-called predetermined length is required. Techniques for excavating trenches and arranging them in the trenches to fill cement, fresh concrete, fresh mortar, etc. and solidify over time have been put to practical use, and are also used for soil retaining walls as an applied technique. ing.

However, for excavation of the trench, FIG.
In order to maintain the strength and rigidity of the ground according to the property of the ground, the unit trench 1 having a set thin width, set vertical length and a predetermined depth is excavated as shown in Fig. Further excavating the unit trench by shifting it to form a trench of a predetermined length, and laying H-shaped steel and rebar inside the trench, and then filling cement, raw concrete and raw mortar, etc. It is solidified to form an impermeable wall.

However, as described above, it takes a lot of man-hours to construct the impermeable wall, and the work is troublesome, resulting in a high cost. As for the basic structure, a thin trench is formed, and a sheet made of a predetermined material such as rubber, synthetic resin, or non-woven fabric is set in the trench, and then the cement, green concrete, green mortar As a result, the construction of a water blocking screen for filling a predetermined solidifying material such as the above has been performed as an alternative.

[0006]

By the way, in the construction of such a water shielding screen, trench excavation is carried out, and the process of hanging and setting the main body of the water shielding screen into the trench is carried out. Due to shape retention work to prevent collapse due to narrow width, setup change is not performed smoothly,
There is a problem that construction management is extremely complicated, there is a drawback that excavation of a trench with a predetermined width cannot be performed as designed, and there is also a difficulty that the mutual connection of water shield screen units does not function well when charging and filling solidifying material etc. However, there was a demerit that many construction days were required and efficiency could not be improved.

That is, for trench excavation, for example,
There is a bucket method as shown in (a) of FIG. 23, there is also a method of excavating with a bucket 2 and a multi-axis cutter 3 as shown in (b), and a crane is used as a construction cart without selecting the soil quality of the ground. Although the construction can be easily performed simply by suspending it, the former has a disadvantage that the construction efficiency is lowered when the depth of the trench 1 exceeds 30 m.

Further, in the latter case, since the width of the trench 1 is set to the width of the cutter 3 and the diameter of the rotary cutter, it is convenient but the size cannot be selected.

Further, as shown in FIG. 24, there is a case where a rotation method using the horizontal axis cutter 4 of (C) is used, and a method where a chain saw 5 or the like is used as shown in (D) is also used. Even if the type is capable of high-speed excavation, it is not possible to perform strong excavation and it is difficult to apply it to bedrock etc., and the width of the trench 1 can be made large.
Although it has an advantage of flexibility in construction that it can be used for bedrock and the like, it has a disadvantage that it is difficult to use at a large depth like the above-mentioned embodiment and the device becomes bulky.

Even when the trench 1 is filled with the solidifying material by these methods, as shown in FIG.
When the construction is carried out by the jump pitch method shown in 6
Is interrupted, and it becomes rack-shaped between the overlapping pitches, and it is difficult to maintain the strength and rigidity of the trench 1, and as a result, as shown in (f), the slack line 6 ′ becomes large and the trench 1 There is a risk that the strength of the 'is insufficient over time, or the water impermeability is deteriorated.

Therefore, as shown in FIG. 26, as shown in (g), the reinforcing bar 7 is built in the trench 1'and cement,
Even if the solidifying material 8 such as fresh concrete or fresh mortar is filled and dealt with, the number of steps is large, the work is complicated, the strength is difficult to manage, and the cost is high, resulting in a long construction period. Therefore, as shown in (h), the technique of suspending the sheet-like water shield curtain main body 9 made of synthetic resin, rubber, or non-woven fabric as described above and disposing it in the trench 1'is not practically used. However, there is an inconvenience that the sealability of the joint 10 cannot be sufficiently maintained when the solidifying material 8 is installed in the joint 10 between the unit water shields 9 and 9.

In the conventional construction of the water shield curtain, the trenches 1, 1 are used to connect the unit water shields 9, 9 to each other.
The work has to be done in 1 ', which is extremely difficult to work, and there is a neck in the conventional technology that the so-called seamless type cannot be performed in the trench.

In a mode in which the trenches 1 and 1'are constructed at a shallow portion of the ground, the ground is likely to collapse, and in order to cope with this, by constructing a guide trench with concrete in advance in a portion close to the ground surface. Construction design is possible up to a depth of about 10 m, but in other words, construction at a depth of 10 m or more has a risk of collapsing and there is a tendency that construction cannot be performed.

For excavation of these trenches 1 and 1 ', for example, there is a backhoe for excavation, but it is difficult to keep the groove width of the trenches 1 and 1'smooth and smooth. The operation control of the backhoe was remarkable, and it was complicated and required a high degree of skill.

[0015]

OBJECT OF THE INVENTION The purpose of the invention of this application is in the construction of a waterproof screen, which is a kind of continuous underground wall based on the above-mentioned prior art,
Along with the excavation of the trench to the face, the impermeable curtain is continuously fed out from the construction device and inserted and set in the trench, and at the same time, the trench and impermeable curtain are temporarily held, and the specified solidifying material is applied. After filling the trench into the trench, remove the holder, or leave it in the buried state, and set the water shield curtain in the ground with high efficiency and efficiency as designed in a short period of time. It is intended to provide an excellent method of constructing a waterproof screen which can be utilized in the field of civil engineering application in the construction industry, and an apparatus directly used for the method.

[0016]

In order to solve the above-mentioned problems, the structure of the invention of the present application, which is based on the above-mentioned object, has a water-blocking property in a trench in a predetermined ground in order to solve the above-mentioned problems. When carrying out the construction to set the curtain, the construction carriage is loaded into the ground and set, the face is excavated in the trench with a saw-type cutter mounted on the frame, and a predetermined pressing force is applied in the forward direction. , To ensure that the excavation can be performed, and the excavated gravel is discharged to the ground by performing a predetermined air lift in the housing of the saw cutter or the like and appropriately separated, and the like. As the process progresses, bobbins and cartridges mounted on the frame of the construction trolley are replaced with rubber, synthetic resin, non-woven fabric, or single layer of metal thin film, or multi-layer sheet-like seamless type water barrier. Rolled out The extension direction is changed by a direction changing guide bar, and it is stretched in the formed trench sequentially in the longitudinal direction via anchors, etc., and the water shield curtain is stretched in the trench in a single-layer or multi-layer state. Immediately after the operation, a bottomed fluid type holding bag made of rubber or synthetic resin,
Alternatively, the bag integrally attached to the water shield curtain is set in a hanging manner at a predetermined interval, and the bag is swelled by being filled with air or the like so as to interpose the entire groove width of the trench. It is a kind of support work to prevent collapse of the wall surface of the trench and form the shape of the trench.
Alternatively, instead of the seamless sheet water-shielding curtain, an accordion-type bellows-type water shield curtain is extended and continuously stretched in the same manner as above, and similarly supported by a fluid-type holding bag to perform such construction for a set length. A seamless type water impervious screen is formed. At this time, for the joint at the end, a sufficient water-sealing property is maintained at the end and the start end of the water impermeable screen to maintain further continuous water impermeability. After the curtain is set up and tensioned, the solidifying material such as cement, fresh mortar and fresh concrete is fed and filled, and then the fluid type holding bag is appropriately removed. It will be reused for the next time, and the impermeable curtain as designed can be performed in a short period of time with high efficiency. Moreover, the collapse of the trench can be reliably prevented, the safety is improved, and the impermeable curtain can be formed at low cost. Technically made possible It is those that have taken the stage.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the invention of this application is shown in FIGS.
It will be described below based on 1.

It is to be noted that the same aspects as those in FIG. 22 and subsequent figures will be described using the same reference numerals.

The illustrated embodiment is a mode in which a water barrier is set in a trench formed in a predetermined ground such as soft ground.
In the principle embodiment shown in FIGS. 1 to 3, a sheet-shaped seamless type such as a rubber, a synthetic resin, a non-woven fabric, or a metal thin film for the thin width and predetermined depth trench 1'of a set size. A saw-type cutter erected on the frame of a construction carriage (not shown) at the time of connecting and setting the water shield screen 9'of the water shield screen 9'at its start end to the anchor 13 and continuously inserting and setting it along the longitudinal direction in the trench 1 '. 14 is moved up and down in a predetermined cycle, and is advanced together with the construction carriage as shown by the white arrow to excavate the cutting face 12 ′, and the excavated gravel 15 is passed through the housing of the saw cutter 14 to the ground. The sheet-shaped water impervious screen 9'is drawn out from the bobbin 16 appropriately mounted on the frame of the truck in the excavated trench 1 ', and the guide bar for changing the direction is guided in the trench 1'. At a predetermined angle, for example, by changing the direction by 45 °, the groove is continuously inserted into the trench 1 ′ for setting, and immediately thereafter, a cylindrical fluid type holding bag 18, 18 made of a predetermined synthetic resin or the like is set. Insert and inflate by air pressure filling, etc., and cover the water shield screen 9'with the trench 1
The wall surface of the '1' is pressed and both walls are kept in shape to prevent the collapse of the trench 1 ', so that the cement, the raw mortar or the green concrete is solidified in the trench 1'as in the conventional manner. , And the fluid-type holding bags 18, 18 ... Are sequentially pulled out after a set time, and after predetermined washing, they are reused for the next construction.

By doing so, the impermeable screen 9'is continuously set in the trench 1'as a seamless type, the construction efficiency is increased, the collapse of the trench 1'is prevented, and the safety and short-term is ensured. The work will be carried out exactly as designed, and the work will be carried out at the minimum necessary cost.

In the basic embodiment, the water screen 9'is in the form of a seamless type flat sheet.

Next, in the concrete embodiment shown in FIGS. 4 to 18, reference numeral 19 is a water shield curtain construction apparatus which forms the center of one of the gist of the invention of this application, and is a crawler type construction carriage 2
The frame 21 of No. 0 is provided with a swingable construction carriage main body 22 having a cockpit 23, a leader 24 standing upright at its front end, a vacuum compressor 25, and a saw cutter 14. As shown in FIG. 16, a predetermined number of cutter blades 14 ′ and 14 ′ are pivotally installed on the front side through a pin 33 so that they can be swung by a predetermined angle, and a winch 26 as an elevating device provided in the construction carriage main body 22 is used. Each cutter blade 14 'is arranged so as to be vertically movable for a predetermined stroke.
The cutting face 12 'of the trench 1'is made possible to be excavated by the gravel 15 of the saw cutter 14 as shown in FIG.
The saw cutter 1 through a duct 36 attached to the rear of the saw
The air is lifted by the compressed air blown up from the bottom of the No. 4, and as shown in FIG. 17, the sand and the gravel are separated by the predetermined separating device 38 via the hose 37 and the predetermined treatment is performed in the next stage. ing.

The saw cutter 14 is used as a face excavator.

Regarding each cutter blade 14 ', as shown in FIG. 6, when excavating the cutting face 12', the gravel 15 is in the closing direction posture with respect to the intake 14 "in the descending process, and the cutting face 12 'is in the raising process. The gravel 15 is swung so as to be taken into the housing 34 through the intake port 14 ″ so as to be in an open posture.

Of course, the backward reaction force due to the excavation in this case is sufficiently supported by applying the pressing force of the cam 36 of the pressing device 35.

As shown in FIGS. 5 and 6, the frame 21 of the construction carriage 20 is provided with a water shield curtain vertical installation device 27 after the saw cutter 14 and is made of a predetermined rubber. A bobbin 16 of a predetermined seamless type sheet-shaped waterproof screen 9 made of synthetic resin, non-woven fabric, or the like is mounted along the vertical direction, and a direction change guide bar 17 is provided directly below the bobbin 16 as shown in FIG. And a tilt angle α in the vertical direction and a tilt angle β in the horizontal direction are set so that they can be adjusted as desired, specifically, β = 45 °.
Etc. and is pivotally installed in a vertically rotatable manner, and the water shield screen 9 ′ from the bobbin 16 changes the extension angle from the vertical direction to the vertical direction,
The bobbin 16 is provided with a seamless type water blocking screen 9'in an endlessly cut face 12 'in the trench 1'along its one wall surface. The starting end portion is connected to the anchor 13 so that it can be stretched along with the construction carriage 19 as it advances.

As shown in FIG. 16, when the saw cutter 14 as a face excavating device is sized so as to exceed 10 m in the vertical direction, the excavation moment causes bending, resulting in insufficient strength and rigidity. When there is a possibility that the pressure will be sufficient, as shown in FIG. 16, a pressing device 35 is provided at the rear of the saw cutter 14 so that a cam 36 is provided on the back surface of the saw cutter 14 by hydraulic pressure or a gear system. The saw-type cutter 14 is operated to apply an appropriate pressing force to the face 12 ', so that the bending due to excavation can be prevented.

As shown in FIG. 17, the pressing device 35 may be a hydraulic jack type pressing device 35 '.

The winch 26 constitutes an elevating device, and the compressor vacuum device 25 and the duct 36 are gravel 15
It is an air lift device for.

An appropriate filter is preferably provided at the inlet of the duct 36 to the housing of the saw cutter 14.

Thus, as shown in FIG. 18, the pressing device 35
Pressing plates 39, 39 for both wall surfaces of the trench 1 ′ are arranged in the groove 1 ′ so that appropriate operation control such as straightness of the saw cutter 14 can be hydraulically performed.

Then, the frame 2 of the waterproof screen construction device 19
In the rear part of the apparatus 1, a waterproof screen holding bag inserting device 28 is provided in the same direction as the waterproof screen vertical device 27, and a fluid such as an airtight cylindrical type made of rubber, synthetic resin, non-woven fabric or the like is provided. The formula holding bag 18 is inflated with air or the like to bring the water shield curtain 9'in close contact with the wall surface on one side of the trench 1 ', and is inflated by air pressure between the wall surface on the one side and the wall surface on the other side. FIG. 9 shows the fluid holding bag 18 that supports the water shield screen 9 ′ on the wall surface.
As shown in FIG. 5, the bridge bar 30 is laid across the protector rails 29, 29 set by the water shielding screen construction device 19 at the time of excavation of the trench 1 ′, and suspended over the bridge bar 30 via the wire 31. Therefore, as shown in FIG. 7, in the trench 1 ′, the loose lines 6 and 6 are reduced in size by expansion of the fluid type holding bags 18, 18 ... 1 '
Post-excavation collapse is reliably prevented and its post-excavation shape is reliably retained.

In FIG. 9, numeral 32 is a solidifying material such as cement, green mortar or green concrete filled in the trench 1 '.

As shown in FIG. 8, the fluid type holding bag 18 has a length up to the depth of the impermeable screen 9'even when the length is sufficient for the depth of the trench 1 '. A shorter length or 18 ″ shorter than that is a design choice for those skilled in the art.

Then, the fluid type holding bag 1 is inserted into the water shielding screen holding bag inserting device 28 through an appropriate union or nipple.
When 8 is inserted into the trench 1 ', air (or an appropriate gas or the like) having a predetermined pressure is injected to expand the trench 8 so as to support the trench 1', so that the collapse thereof is prevented. It can be prevented.

As described above, the impermeable screen 9'is
Although it is a seamless type and is drawn out endlessly from the bobbin 16, its length is finite in the plant of the construction work, and therefore a considerable length may be required depending on the construction scale. In such a case, when it is necessary to connect the water shields 9'and 9'in the middle of the trench 1'when extending the length of the water shield screen 9'through a joint, As its joint structure, for example, as in the embodiment shown in FIG. 10, the fluid holding bag 4 is substantially the same as the above at the start end and the end.
0 and 40 with an appropriate filling device, as shown in FIG.
It can be inflated and pressed against each other, and can be connected to each other in a completely sealed state. At the time of the connection, the water shielding curtain holding bag insertion device 28 is attached to each fluid holding bag 40, 40.
Can supply air (or an appropriate gas) of a predetermined pressure through an appropriate union, nipple or the like to expand the same, and can also make an elliptical cross section as in the embodiment shown in FIG. As shown in FIG. 12, a circular fluid type holding bag 40 ′, 40 ′ can be used.
As shown in FIG. 3, another fluid type holding bag 40 ″ may be interposed as a back-up to provide the connection and the sealing property. Furthermore, as shown in FIG. Made of synthetic resin facing the wall surface of the holding bags 40, 40
Alternatively, the metal plates 41, 41 may be interposed so as to have the shape-retaining property in the ground portion and have the supporting and supporting function.

In the above-mentioned structure, the water shielding curtain construction device 19 is carried in and set in a predetermined water shielding curtain construction area, and then, as shown in FIGS.
A winch 2 is formed by inserting a saw-type cutter 14 as a face excavating device into a portion where the guide trench has been excavated in advance by the means shown in the figure or an appropriate means such as a backhoe.
When the saw-type cutter 14 is moved up and down in a predetermined cycle via 6 to operate the vacuum compressor device 25,
In the lowering process, as described above, the cutter blade 14 '
Is closed and smoothly descends, and in the ascending process, it is opened to excavate the face 12 ',
The gravel 15 'from the intake 14''to the housing 3
4, the air is lifted by the dynamic pressure of the air of a predetermined pressure ejected from the duct 36 into the housing 34, and the sand content and the gravel portion are separated by the separating device 38 via the hose 37, and the predetermined treatment is performed.

Thus, the raising and lowering operation of the saw type cutter 14 is surely performed by the pulling up action of the winch 26 and the lowering due to its own weight.

Then, the cutting face 12 by the saw type cutter 14
In the excavation process of ', the excavation reaction force is generated, but the excavation reaction force is absorbed by the pressing force applied by the pressing device 35 to the front side via the cam 16, and the cutting face 12 at the bottom of the saw cutter 14 is absorbed. 'No separation occurs, and smooth excavation is performed stably.

Thus, the trench 1'is continuously excavated through the forward movement by the water shielding screen construction device 19 at a predetermined pitch, and the water shielding screen vertical installation device 27 provided after the saw cutter 14 is installed. The sheet-shaped water shield screen 9'from the bobbin 16 descends along the longitudinal direction of the trench 1'by the vertical direction of the trench 1 ', and then the direction-changing guide bar 17 changes its feeding direction backward by 90 °, so that the starting end portion of the anchor 13'. Since it is connected to the water shielding screen 9 ', the water shielding screen 9'is continuously extended from the bobbin 16, and the seamless type sheet shielding screen 9'is continuously extended in the longitudinal direction of the trench 1'. Go.

Then, the fluid holding bag inserting device 2 for the waterproof screen 9'provided at the rear of the waterproof screen construction device 19
From 8 onward, the fluid-type holding bags 18, 18 are sequentially arranged at predetermined pitches on the guide bar 30 via the wire 31 and the trench 1 '.
It is introduced between the wall surface on one side and the water shield curtain 9 ', and air of a predetermined pressure is injected through a union, a nipple, etc., and as shown in FIG. While pressing 'on one wall surface, it expands to support the trench 1'as a supportive work, preventing collapse due to vibration during construction, loosening line 6,
6 is made small in a predetermined pitch to prevent collapse and to be sufficiently prepared for the setting of the impervious screen in the next step and filling of fresh mortar and the like.

In this way, the saw cutter 14 surely excavates the cutting face 12 'to form the trench 1'as the water shielding screen construction device 19 moves forward intermittently or continuously as shown by the white arrow. A continuous type sheet-shaped water shield curtain 9'is continuously formed without interruption, and is set in the longitudinal direction of the formed trench 1 ', and at the same time, the fluid holding bags 18, 18 ... While the water shield screen 9'is attached to one wall surface of the trench 1'and the trench 1'is supported to prevent collapse, there is a filling material supply device (not shown in the figure) However, the solidification material 32 of predetermined cement, green mortar, or green concrete is filled in the trench 1'as shown in FIG. 9 and solidified with time.

When the trench 1'is formed for a predetermined distance, the waterproof screen construction device 19 is transferred to the next construction site, and the fluid type holding bags 18, 18 ... Immediately before the solidifying material 32 solidifies. It will be pulled out as specified and used for the next reuse.

During this time, the impermeable screen 9'of the bobbin 16
10 is consumed and the end of the impermeable screen 9'and the next impermeable screen 9'in the trench 1'are connected, as shown in FIG.
The fluid holding bags 40, 4 of the joint shown in FIG.
Interconnection by 0 ', 40'',40''' is done in a seal and set continuously.

Therefore, in order to form the water shield curtain 9'of a considerable length, although the unit water shield curtain 9'itself is a seamless type, such a joint is formed for each unit length, The construction of the joint is carried out completely automatically or semi-automatically in the process of forming the trench 1 ', and there is substantially no hindrance to the efficiency of construction.

Therefore, the trench 1'is formed continuously from excavation of the face 12 'to a continuous set of water shields 9',
Further, the supporting work and the supply of the filling material are fully automatically performed, and further, the collapse of the trench 1'is avoided, which is safe and efficient, and the construction can be completed with high accuracy in the design period. It can be done.

Next, in the embodiments shown in FIGS. 19, 20, and 21, the water shield screen 9 '' is an accordion type bellows type, and the magazine 16 'is compressed and packed in a dense state. From the set one, it is taken out downward, and the saw cutter 14 is inserted through the guide bar 17 'direction changing device.
This is a mode in which the trench 1'formed by is endlessly set along the longitudinal direction thereof, and is substantially the same as the above-described embodiment and its action and effect.

As a matter of course, with respect to the joint having the unit length, the same mode as in the above-mentioned embodiment can be adopted.

As for the structure of the water-impervious screen 9 ', other than the above-mentioned embodiments, for example, the modes of FIGS. 22 to 25 are also possible, and the mode of the water-impervious screen 9''shown in FIG. In that case, the pair of curtains are made of the same flexible material as in the above-mentioned embodiments, and partition films 91, 91 ... When it is mounted on the entire apparatus by a bobbin or a magazine, it is made into a kind of a folding type so that it is apparently single and inserted into the trench 1 ′ and the solidifying material 32 is filled when the solidifying material 32 is filled. There is no hindrance to the filling of the trench 1 ', and the function of reliably supporting the opposing inner wall surfaces of the trench 1'can be fulfilled.

Next, in the embodiment shown in FIG. 23, the curtain is made into a triple impermeable curtain 9 '", and partition membranes 91', 91 of partitions are provided at a predetermined pitch between the curtains. '... are arranged in a zigzag pattern. For example, the middle layer curtain can be made of metal, etc., and the strength of the impermeable curtain 9''' can be maintained sufficiently. It is a mode.

Further, the embodiment shown in FIG. 24 is also a mode of a multi-layer water barrier screen 9 "", and a holding bag 41 having a rectangular shape and a circular shape is alternately provided between a pair of curtain bodies at a predetermined pitch. , 41 '
... is interposed, and the solidifying material 32 is expanded by air (or a predetermined gas) at the time of filling the solidifying material 32 as in the above-described embodiment, and the solidifying material filling between the holding bags 41 and 41 'is carried out for the convenience of construction. It is a mode that can be appropriately performed according to.

In the embodiment shown in FIG. 25, the multi-layer water blocking screen 9'is also provided with a holding bag 42, 42 ... As a bellows type partition on the inner surface of one of the screens 9'and solidifying material. In the same manner as described above, during the filling, the pressure between the wall surfaces of the trench 1'is bulged by air pressure or the like so that the solidified material is reliably filled.

Thus, in any of the above-mentioned modes, the water-shielding screen is a multi-layered structure, but when mounted on a bobbin or a magazine, it can be folded to make it seemingly one-layered. Is.

Of course, the embodiment of the invention of this application is not limited to the above-mentioned embodiments. For example, not only excavation of a straight ground for a trench but also a predetermined angle including a right angle. Various modes can be adopted, such as being possible even in bent excavation.

Further, in terms of design modification, not only the saw type cutter type but also the chain saw type can be adopted in the face excavating device, and further, the face excavating device and the water shield vertical installation device. It goes without saying that the water shielding screen holding bag insertion device and the like may be installed not only on the side portion of the construction carriage but also on the central portion of the construction carriage.

The construction carriage may be not only the crawler type, but also the wheel type or the rail traveling type, which is merely a design change for those skilled in the art. Of course, of course.

Of course, H-shaped steel, rebar, etc. can be laid in the trench, and the filler may be cement, fresh mortar or fresh concrete, for example, waste material or the like. Of course.

Further, not only synthetic resin but also non-woven fabric, paper, etc. are used as the material of the water shield, and metal thin film,
And those synthetic materials are also used.

Further, as an application example, not only the impermeable curtain as an impermeable wall but also an earth retaining wall or a continuous underground wall can be applied.
It is also within the spirit of the invention of this application that it may also be used for offshore construction.

[0060]

As described above, according to the invention of this application, basically, a water shield curtain belonging to one of the continuous underground walls, which is a very important construction work prior to the formation of structures on various land, etc. It is possible to form trenches continuously during construction, and to insert and set seamless type or bellows type endless impervious screens in the trenches formed continuously along the vertical direction. It is a jointless type because it can be set endlessly in the trench of the same depth as the trench with the same depth as that of the trench without intermittent connection through the joint. The excellent effect that the water function is sufficiently maintained and the original design purpose can be sufficiently fulfilled.

Since the construction can be carried out fully automatically in one stroke, construction efficiency is good, reliable construction can be performed within the design period, there is no collapse of the trench, and safe and highly accurate water shield curtain construction can be performed. In addition, there is an excellent effect that the construction accuracy is high and the cost can be reduced accordingly.

Since the excavation of the face of the trench can be performed by a saw-type cutter or the like, not only the construction accuracy is good, but also the rock mass etc. can be surely constructed by the mechanical power, and the construction can be performed. The excellent effect of increasing reliability is exhibited.

Since the water shielding curtain set in the trench can be sequentially supported by the fluid holding bag, the collapse of the trench can be prevented from this point as well, and the used fluid holding bag can be used. Since it can be reused after the next time after it is pulled out before the solidification of the solidified material and washed, it is possible to reduce the cost from this point as well and improve the efficiency of use of the product. There are advantages.

Further, the water shield curtain is set in a compactly contracted state on a bobbin or magazine mounted on the frame of the construction carriage and is sequentially taken out endlessly. It is possible to deal with it, it leads to higher efficiency of construction and accuracy, and even if the unit length is exhausted, it can be joined to the seal by the engagement of the fluid type holding bag, and the straight line of the trench, the curve It has the merit of being highly elastic that it can handle this regardless of the shape.

[Brief description of drawings]

FIG. 1 is a schematic sectional side view of a principle aspect of the invention of this application.

FIG. 2 is a schematic partial plan sectional view of the same.

FIG. 3 is a schematic plan view showing a set state of the water shield.

FIG. 4 is a schematic side view of a partial cross section of a construction device according to an embodiment of the invention of this application.

FIG. 5 is a plan view of the same.

FIG. 6 is a partial cutaway side view of the water shielding screen vertical installation device.

FIG. 7 is a plan cross-sectional view of the water-shielding curtain fluid type holding bag in the trench.

FIG. 8 is a schematic side view of the water blocking screen set with the trench and the water blocking screen fluid holding bag.

FIG. 9 is a partial cross-sectional view of the set water blocking screen other than the trench and the water blocking screen fluid holding bag filling material.

FIG. 10 is a plan cross-sectional view of the end joints of the unit water shields.

FIG. 11 is a partial cross-sectional view of a joint connection state.

FIG. 12 is a plan sectional view of another embodiment of the same.

FIG. 13 is a plan sectional view of the other embodiment.

FIG. 14 is a partial cross-sectional view of still another embodiment of the present invention.

FIG. 15 is a plan sectional view of still another embodiment.

FIG. 16 is a partial vertical cross-sectional view of the face drilling device.

FIG. 17 is a schematic schematic side view of another aspect of face excavation.

FIG. 18 is a partial plan sectional view of the same.

FIG. 19 is a partial plan sectional view of an example of construction of a water shield screen.

FIG. 20 is a partial vertical sectional view of the same.

FIG. 21 is a partial cross-sectional schematic side view of the same setting.

FIG. 22 is a schematic partial cross-sectional side view of trench excavation in a conventional mode.

FIG. 23 is a schematic side view of a conventional trench excavation construction device.

FIG. 24 is a partial cross-sectional schematic side view of another embodiment of the same.

FIG. 25 is a schematic plan view of a slack line of a general aspect of a trench.

FIG. 26 is a partial cross-sectional plan view of the conventional trench construction.

[Explanation of symbols]

12 Ground 1'Trench 9'Flexible water screen 12 'Cutting face 19 Construction trolley 14 Saw-type cutter (cutting face concrete device) 35 Pressing device 15 Gravel 18 Fluid holding bag 40, 40', 40 '', 40 '''Ground (fluid holding bag) 21 Frame 27 Water shield vertical installation device 17 Direction changing device (guide bar) 19 Water shield installation device 25 Fluid lift device 26 Lifting device 28 Water shield holding bag insertion device

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[Procedure amendment]

[Submission date] July 21, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic sectional side view of a principle aspect of the invention of this application.

FIG. 2 is a schematic partial plan sectional view of the same.

FIG. 3 is a schematic plan view showing a set state of the water shield.

FIG. 4 is a schematic side view of a partial cross section of a construction device according to an embodiment of the invention of this application.

FIG. 5 is a plan view of the same.

FIG. 6 is a partial cutaway side view of the water shielding screen vertical installation device.

FIG. 7 is a plan cross-sectional view of the water-shielding curtain fluid type holding bag in the trench.

FIG. 8 is a schematic side view of the water blocking screen set with the trench and the water blocking screen fluid holding bag.

FIG. 9 is a partial cross-sectional view of the set water blocking screen other than the trench and the water blocking screen fluid holding bag filling material.

FIG. 10 is a plan cross-sectional view of the end joints of the unit water shields.

FIG. 11 is a partial cross-sectional view of a joint connection state.

FIG. 12 is a plan sectional view of another embodiment of the same.

FIG. 13 is a plan sectional view of the other embodiment.

FIG. 14 is a partial cross-sectional view of still another embodiment of the present invention.

FIG. 15 is a plan sectional view of still another embodiment.

FIG. 16 is a partial vertical cross-sectional view of the face drilling device.

FIG. 17 is a schematic schematic side view of another aspect of face excavation.

FIG. 18 is a partial plan sectional view of the same.

FIG. 19 is a partial plan sectional view of an example of construction of a water shield screen.

FIG. 20 is a partial vertical sectional view of the same.

FIG. 21 is a partial cross-sectional schematic side view of the same setting.

FIG. 22 is a schematic partial cross-sectional side view of trench excavation in a conventional mode.

FIG. 23 is a schematic side view of a conventional trench excavation construction device.

FIG. 24 is a partial cross-sectional schematic side view of another embodiment of the same.

FIG. 25 is a schematic plan view of a slack line of a general aspect of a trench.

FIG. 26 is a partial cross-sectional plan view of the conventional trench construction.

FIG. 27 is a schematic view of a trench excavation mode based on the related art.

FIG. 28 is a schematic diagram of a trench excavation mode based on a conventional technique.

FIG. 29 is a schematic diagram of a trench excavation mode based on a conventional technique.

FIG. 30 is a schematic cross-sectional view of the water shielding curtain adjustment construction in the trench based on the conventional technique.

[Explanation of symbols] 12 Ground 1'Trench 9'Flexible water shield 12 'Face face 19 Construction trolley 14 Saw-type cutter (face face concrete device) 35 Pressing device 15 Sand gravel 18 Fluid holding bag 40, 40', 40 " , 40 ″ ′ ″ Ground (fluid type holding bag) 21 Frame 27 Water shield screen vertical installation device 17 Direction changing device (guide bar) 19 Water shield screen construction device 25 Fluid lift device 26 Lifting device 28 Water shield screen holding bag insertion device

Claims (23)

[Claims] 1. A face for forming a trench in a method for constructing a water shield curtain, which comprises excavating a trench having a predetermined width of a set width in the ground and inserting and setting a flexible water shield curtain in the trench. A method for constructing a water shield curtain, wherein a water shield curtain is continuously set by a construction device in a trench formed while being continuously drilled. 2. The method of constructing a water shield according to claim 1, wherein the water shield is drawn out seamlessly from a construction device. 3. The method for constructing a water shield according to claim 1, wherein the water shield is delivered in a bellows shape from a construction device. 4. The method for constructing a water shield according to claim 1, wherein the water shield is made of a flexible material. 5. The method for constructing a water shield according to claim 1, wherein the water shield is made of a metal material. 6. The method according to claim 2 or 3, wherein the water shield curtain is extended from the construction device and is bent and set in the trench. The method of construction of the water shield described. 7. The method for constructing a water shield according to claim 1, wherein the excavation of the face is performed by a saw cutter that moves up and down. 8. The method for constructing a water shield according to claim 1, wherein the water shield is delivered from a cartridge set in a construction device. 9. The method for constructing a water shield as claimed in claim 7, wherein the saw cutter is adapted to exert a pressing action on the face. 10. The method for constructing a water shield according to claim 7, wherein the excavated gravel from the face is discharged from the saw cutter to the ground via a fluid lift. 11. The method for constructing a water shield according to claim 5, wherein the saw cutter is operated while controlling the posture in the traveling direction in the formed trench. 12. The water shielding screen set in the trench is pressed and urged against the wall surface of the trench through a fluid type holding bag.
The method for constructing a water barrier curtain according to any one of 4 above. 13. The method for constructing a water shield according to claim 10, wherein the water shield is formed in multiple layers via a partition. 14. The method for constructing a waterproof screen according to claim 11, wherein the partition is a bag. 15. The method for constructing a water shield according to claim 11, wherein the partition is expanded and contracted by fluid pressure. 16. A joint between water shields set in the trenches is performed by engaging a fluid type inflatable bag formed at an end portion of each water shield. Construction method for water shield as described in paragraph. 17. The method of constructing a water shield according to claim 1, wherein another fluid type inflatable bag is adjacently engaged with the joint. 18. A water shield curtain construction apparatus for excavating and forming a trench having a predetermined length of a set width in the ground, and inserting and setting a flexible water shield curtain in the trench. The face shield digging device and the water shield screen vertical installation device, which is located behind the face shield digging device, are provided together with the water shield screen feed-out direction changing device. 19. The water shield screen construction apparatus according to claim 17, wherein a fluid lift device for excavating sand and gravel is provided side by side with the face excavating device. 20. The water shielding screen construction apparatus according to claim 17, wherein the face excavating device is a saw-type cutter and is linked to an elevating device. 21. The water shielding screen construction apparatus according to claim 17, wherein the face excavating device is provided with a pressing device for the face. 22. The water shield screen construction apparatus according to claim 17, further comprising a pressing device for the face excavating device. 23. The water shielding curtain construction device according to claim 17, wherein a water shielding curtain holding bag inserting device is provided behind the water shielding screen vertical installation device.