JP2001152425A - Seawall structure of revetment - Google Patents

Abstract

(57) [Abstract] [Problem] When constructing a waste disposal site in the sea area, a water barrier layer for the base rubble and the seabed ground surface is constructed by stacking multiple layers of water-stopping members to improve the reliability of the water barrier layer. Be able to improve. SOLUTION: The inland sea side of the foundation rubble 5 on which the caisson of revetment is placed and a water stop layer 10 formed in a predetermined area of the seabed ground.
After laying a sheet-like member integrally provided with a mesh-like member on the surface of the foundation and the undersea ground, a mastic layer 20 is constructed by casting asphalt mastic to a predetermined thickness to form a double water-impervious structure. Build as layers. Then, the upper protective layer 21 as a holding member is constructed thereon, and the landfill 8 made of waste can be constructed in a state where the water blocking layer 10 is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of laying along a seawall such as a landfill, where water in the partition side is exposed to the open sea due to tidal currents, waves, tide fluctuations, or residual heads in the partitioned area. The present invention relates to a water-blocking structure for preventing water from flowing out.

[0002]

2. Description of the Related Art In order to landfill and dispose of waste, a disposal site has conventionally been constructed in a mountainous remote place or the like. At the disposal site, a waterproof sheet or the like is laid on surrounding ground. After dumping water, waste is dumped. However, the above-mentioned disposal sites are often located far from cities and industrial areas that discharge a large amount of waste, and have a transportation problem for transporting waste. In addition, land-based disposal sites have problems from the viewpoint of environmental preservation of the surroundings, and the inability to obtain the consent of residents, and it has become difficult to secure large-scale waste disposal sites. I have. Therefore, in the future, a landfill will be constructed by partitioning the sea area near cities and other places where large amounts of waste will be discharged, and new land will be constructed using waste and the transportation distance from the discharge area will be shortened. It is conceived to be able to deal with the situation.

In the case of constructing the above-mentioned waste disposal site in the sea, a ground improvement work for strengthening the seabed ground has been conventionally performed at a construction site of a revetment in a landfill, and the masonry foundation has been raised to a predetermined height. And flatten the upper surface, and then arrange existing structures such as caissons on the foundation. In order to provide the structure and the masonry foundation with water-blocking properties, for example, as in the case of a land-based disposal site, a waterproof sheet and a protection mat are laid one on top of the other, and the waste sheet is used for the masonry-based foundation. To stabilize it. As the sheet such as the waterproof sheet, for example, a thin rubber sheet or a sheet made of plastic such as vinyl chloride and having a water-impermeable property is used. In addition, between structures such as caissons installed on the masonry foundation, elastic rubber partition members are arranged at predetermined intervals, and asphalt mastic or the like is filled between the partition members. To prevent seawater from flowing between caisson.

[0004]

However, when the water-resistant sheet is constructed in the sea, the sheet is relatively thin and light, so that the sheet is exposed to wind and waves, and so on. It is difficult to lay exactly where it is needed. When the waterproof sheet is installed so as to cover a wide area, it is necessary to connect the sheet ends in the sea to secure the waterproof property at the connecting portion, but the connected sheet is not stable. The connection is cumbersome, and in order to use weights and other auxiliary means together,
It also causes the construction cost to rise significantly.

Further, when laying a sheet in the sea, the soil cannot be leveled as in a land-based disposal site, and is placed on the surface of a masonry with large unevenness. However, there is a problem that the portion hitting the convex portion is easily damaged, and it is difficult to secure the water stoppage by the sheet. In addition to the above-mentioned problems, the undersea ground improvement work is performed on the lower surface of the masonry foundation that supports the caisson, so the supporting action on the structure body can be stably exhibited. The seabed is likely to sink due to waste due to the compaction of the soil, and the sheet laid from the edge of the masonry foundation toward the seabed will be subjected to a pulling action, causing the sheet to break. Occurrence is assumed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problem in the case of constructing a water-stopping layer in the sea, and provides a revetment which can easily be laid and secures water-stopping performance. It is intended to be.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a surface of a foundation rubble of a reclaimed revetment constructed by rubble of a foundation on a seabed ground, and a multilayer water-blocking structure constructed over a predetermined area of the seabed ground. The invention according to claim 1 of the present invention is characterized in that a sheet-like water stopping body and a net-like member superimposed on the upper surface thereof are laid over a predetermined range of the surface of the foundation rubble and the seabed ground, and the water stopping member A mastic layer is formed on the mastic layer to include the net-like member inside the mastic layer. The mastic layer in which the net-like member is integrated as a reinforcing material can cope with the pressure of the landfill and the like, and can exert the water stopping action satisfactorily.

According to a second aspect of the present invention, a net-like member is laid over a predetermined range of the surface of the base rubble and the seabed ground, and a sheet-like water stopping body and a net-like member are superimposed on the upper surface of the net-like member. Laying a water-stopping member by a member, constructing a mastic layer on the water-stopping member, and comprising a net-like member on the upper surface of the sheet-like water-stopping body inside the mastic layer. I do. Therefore, the unevenness of the surface of the base rubble can be reinforced by the net-like member on the lower surface of the sheet-like water stopping body, and the sheet-like water stopping body laid thereon and the mastic layer including the net-like member have a water stopping effect. Can demonstrate.

According to a third aspect of the present invention, a sheet-like waterproofing body and a water-stopping member combined with a net-like member on one or both of upper and lower surfaces thereof are laid over a predetermined range of the surface of the base rubble and the seabed ground. Then, a mastic layer is constructed on the water blocking member, and the net-shaped member on the upper surface of the sheet-shaped water blocking member is included in the mastic layer. Therefore, the sheet-like water stopping body can be reinforced by the net-like member, and the mastic layer including the sheet-like water stopping body and the net-like member laid thereon forms a double water-stopping layer to have a water stopping effect. Can demonstrate.

According to a fourth aspect of the present invention, the surface of the base rubble is covered with a mastic layer constructed by laying a mastic or laying an asphalt mat on which joints have been subjected to a water-stopping treatment. Over a predetermined range, a sheet-like water stopping body and a water-stopping member combining a net-like member on the upper surface thereof are arranged, and a mastic layer is constructed on the sheet-like water stopping body to form the sheet-like water stopping body. It is characterized in that the net-like member on the upper surface is included in the mastic layer. According to the invention of claim 5, the surface of the basic rubble is covered with a mastic layer, and a sheet-like waterproofing body is overlaid, and an asphalt mat is laid. By forming the mastic layers on both the upper and lower surfaces of the sheet-like water stopping body, a more reliable three-layer water stopping structure can be obtained.

According to a sixth aspect of the present invention, the surface of the basic rubble is covered with a mastic or a mastic layer which is constructed by laying an asphalt mat which has been subjected to a waterproofing treatment for joints. A sheet-like water stopping body or a sheet-like water stopping body having a net-like member arranged on one or both surfaces is laid over a predetermined range of the seabed ground, and the mastic layer and the water stopping sheet form a two-layer water stopping layer. Are formed to overlap each other. And the water-blocking structure of the mastic layer disposed on the surface of the basic rubble and the water-blocking sheet can exhibit good water-blocking properties, and can easily lay the sheet-shaped water-blocking body.

According to a seventh aspect of the present invention, a fibrous layer of a non-woven fabric or a woven fabric is disposed on the surface of the base rubble, and the net-like member is formed on one surface or on a predetermined range of the surface of the fibrous layer and the seabed. A sheet-like water stopping body arranged on both sides is laid, a mastic layer is constructed on the sheet-like water stopping body, and a net-like member on the upper surface of the sheet-like water stopping body is included in the mastic layer. It is characterized by the following.
And the unevenness of the surface of the basic rubble is reinforced with a fiber layer, and the sheet-like water stopping body and the mastic layer laid thereon can exhibit good water stopping performance.

[0013] The invention according to claim 8 is characterized in that the fiber layer is a woven or non-woven member having water permeability, and is capable of exhibiting water impermeability by covering the upper surface with asphalt mastic. . The invention according to claim 9 is characterized in that the sheet-like water stopping body is a sheet having a water stopping property made of a rubber or plastic material.
The invention according to claim 10, wherein the net-like member combined with the sheet-like water stopping body is a wire netting, a mesh-like metal member, or a synthetic fiber or an artificial fiber, a net-like member of a natural fiber,
It is characterized by being constituted integrally with the sheet-like member.

Therefore, according to the structure of the constituent members,
Even when the unevenness of the surface of the foundation is large, when a pressing force is applied from above, the sheet-like member can extend along the surface with large unevenness, and a water-stop layer integrated with the asphalt mastic layer without forming a gap. Can be easily formed. In addition, since the sheet-shaped water blocking body has no water permeability, it is possible to prevent contaminated water from leaking out of the partitioned area. Further, when the molten mastic flows toward the net-like member, the mastic is retained in a state where the mesh is clogged, so that the mastic layer forming operation can be easily performed.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a water barrier structure of a revetment in which multilayer water blocking members according to the present invention are arranged in an overlapping manner. The example shown in FIG. 1 shows a case in which a partition seawall such as a general landfill is constructed using a caisson, and an improved ground 7 in which ground improvement work has been performed on the ground in the caisson construction area of the seabed ground 6. And its improved ground 7
Piled stones on top of each other, a basic rubble 5 having a specified height and width
Then, a caisson 2 is installed and a seawall 1 is constructed. Then, in the area divided by the revetment 1, waste is dumped to construct a landfill 8. Contain harmful substances leaching from the waste dumped in the landfill 8,
In order to prevent harmful substances from leaking into the open sea, partition members 3a and 3b made of rubber cylinders are arranged between the caisson 2 and asphalt between the partition members 3a and 3b. The mastic filling layer 3c is provided to construct the water stop section 3 as a caisson partition.

Further, a water-stopping treatment layer 10 is installed on the inner surface of the landfill of the foundation rubble 5 and a predetermined section of the seabed ground 6, so that the water-stopping treatment layer 10 and the seabed ground 6 are connected to each other. In order to prevent the seawater from circulating and prevent the water stoppage treatment layer 10 from becoming unstable due to the pressure of the seawater due to the ebb and flow of the tide and the pressure of the water accumulated inside the landfill. The protection layer 21 is constructed. The upper surface protective layer 21 is constructed by using an easily available material such as sand, so that the water stoppage treatment layer is not lifted by the front tide fluctuating pressure, and is prevented from being broken by the insertion of a landfill material, thereby ensuring water stoppage. Like that.

The water-stopping treatment layer 10 is constituted as shown in FIG. 2, and comprises a water-stopping member in which a water-stopping sheet 11 and a mesh member 12 are integrally formed on the surface of the basic rubble 5,
The asphalt mastic layer 20 cast on the water-stop sheet 11 is overlapped to form a double water-stop layer. The asphalt mastic layer 20 is formed between the landfill 8 and the open sea so as to have a thickness enough to exhibit good water stopping performance, and is, for example, 5 to 15 mm.
Work to have a thickness of about cm. When the asphalt mastic is applied, the surface of the sheet for waterproofing 11 is smooth, but the mastic enters the uneven portion of the mesh member 12 and solidifies, thereby constructing the mastic layer 20 having a predetermined thickness. It is possible.
In the following description, the `` mastic layer '' is a layer formed by directly laying an asphalt mastic, or a layer formed by laying an existing asphalt mat, unless otherwise specifically described. Collectively.

The water-stop sheet 11 and the mesh member 12 provided on the water-stop treatment layer 10 can be configured as shown in FIGS. The waterstop sheet 11 is made of, for example, a rubber / plastic material conventionally used as a waterstop sheet in a landfill, such as rubber, vinyl chloride, polyethylene, or polypropylene.
It is formed as having a thickness of 1 to 5 mm. The mesh member 12 provided integrally with the water stopping sheet 11 may be a metal net-like member such as a wire net or lath metal, or a sheet or net-like member made of fiber. It is convenient to use a mesh member or a net member formed by knitting a chain or a wire, since the effect as an anchor of the sheet member for waterproofing can be exerted. Then, the water stopping sheet 11 and the mesh member 12 are integrally combined with each other using an adhesive tape or any other connecting member 13 so that the water stopping property of the water stopping sheet 11 is not affected. I have to. In addition, even when using a wire or the like penetrating the water-stopping sheet 11 in order to combine the mesh member 12 with the water-stopping sheet 11, an auxiliary tape or The hole may be closed using an adhesive or the like.

As described above, the water-stopping member in which the water-stopping sheet 11 and the mesh member 12 are overlapped and integrated with each other is affected by wind and waves even when it is constructed under the sea. There is a feature that the construction can be easily performed without using a weight member or the like in particular for positioning on the surface of the foundation rubble without the need to perform the operation. Further, the mesh member 1 provided in combination with the water stopping sheet 11
As 2, it is possible to use a member having an arbitrary weight and strength, but as the mesh member 12,
It has a role to oppose an impact, a load, and a pressing force applied to the water stopping sheet 11. Therefore, it is desirable that the mesh member 12 has as high a strength as possible and prevents the asphalt mastic to be cast thereon from flowing, so that the mastic layer 20 can be easily formed.

When manufacturing a water-stopping member combining the water-stopping sheet and the mesh member at a factory, the width is 2 to 5 m.
It is necessary to connect the water-stopping sheet 11 at the construction site to construct a water-stopping layer over a predetermined range of the surface of the foundation rubble 5 and the improved ground 7. When connecting the water stopping sheet, a connecting means as shown in FIGS. 5 and 6 can be used, but any other connecting means may be applied. When the connecting means shown in FIGS. 5 and 6 is used, the overlapping portions 15 are provided by overlapping the ends of the water-stop sheets 11 and 11 with a predetermined width, and an adhesive or the like is provided between the water-stop sheets. By forming the adhesive layer 16 on which the adhesive tape is arranged or by performing thermal welding, the seam (joint) is made waterproof. In addition, between the mesh members 12 provided integrally with the waterstop sheet 11, a connection tool 17 such as a turn buckle is used to connect the mesh members 12, 12, thereby ensuring the function of the waterstop sheet as a protective layer. .

As described above, an asphalt mastic is cast on the upper surface of the water-stopping member in which the water-stopping sheet 11 and the mesh member 12 are integrated, and a predetermined thickness as shown in FIG. The mastic layer 20 is constructed. When constructing the upper surface protective layer 20, a molten asphalt mastic is constructed using a pipe or the like from a construction boat floating on the sea. When the mastic layer 20 is applied, the material in contact with the metal of the mesh member 12 on the water-stop sheet 11 is rapidly cooled, and is first attached to cover the surface of the metal of the mesh member 12. The mastic layer 20 having a predetermined thickness is formed such that the adhered portion blocks the flow. In the water-stopping layer 10 covering the surface of the basic rubble 5, the water-stopping layer made of a rubber-plastic sheet-like member and the water-stopping layer made of a mastic layer 20 integrated with the mesh member 12 as an internal reinforcing member are used. The water-stopping layer is formed by stacking a double water-stopping layer, and the water-stopping sheet 11 and the mesh member 12 are integrated with each other by using the connecting member 13 so that the water-stopping sheet is easily formed by the water-stopping sheet. It can be built.

As shown in FIG. 7, it is assumed that the pressure of the waste to be dumped into the landfill, the impact of the lump to be dumped first, and the like are large with respect to the water blocking layer disposed on the surface of the foundation rubble. In this case, as shown in FIG. 8, the lower surface mesh member 18 is applied to the surface side of
It is also possible to construct a water stopping member in which the mesh member 1 and the mesh member 12 are integrated. In the example of FIG. 8, when the lower mesh member 18 is disposed on the lower surface of the water-stop sheet 11, the lower mesh member 18 is configured as a composite material in which the lower mesh member 18 is integrally attached to the lower surface of the water-stop sheet 11 in advance. May be used. As shown in FIGS. 5 and 6, when forming the connection portion of the water-stop sheet 11, the connection portions to the mesh member 8 are simultaneously formed on the upper and lower surfaces of the overlapping portion of the water-stop sheet. It can also be configured. In addition, since the water-stopping member in which the mesh members 12 and 18 are arranged on the upper and lower surfaces of the water-stopping sheet 11 and integrated with each other has a large weight, the workability in the sea can be favorably exhibited. This makes it possible to more easily perform the work of constructing the surface of the foundation rubble.

As shown in the embodiment of FIG. 1, when constructing the water stoppage treatment layer 10 over a predetermined area of the surface of the foundation rubble 5 and the seabed 6, first, the foundation rubble 5
As in the case of the conventional seawall construction, a work for strengthening the ground is performed on the seabed ground 6 corresponding to the above, and the improved ground 7 is constructed. Then, a stone or the like of a predetermined size is dropped on the improved ground 7 to construct the basic rubble 5, and the basic rubble 5
Leveling work is performed so that the upper surface and the inclined surface of each of them have predetermined irregularities. A caisson 2 having an asphalt mat 2a integrally provided on the lower surface is installed on the upper surface of the foundation rubble 5, and the caisson 2 is held by the asphalt mat 2a so as not to slide. To be able to secure.

Since a large number of the caisson 2 are laid side by side in a horizontal direction, it is necessary to secure water stopping between the caissons 2, 2,.... Therefore, in order to ensure the water stopping between the caissons 2, 2,..., For example, a water stopping means having a configuration as shown in JP-A-4-38324 or the like can be provided. In the conventional example, as shown in FIG. 1, partition members 3a and 3b formed of rubber cylinders are arranged, and the partition members 3a and 3b are arranged.
The caisson partition 3 is constructed by providing a packed layer 3c of asphalt mastic between b. After the caisson is constructed as described above, the waterproof sheet 11 and the mesh are connected to the mat 2 a provided on the lower surface of the caisson so as to cover the surface of the base rubble 5 and the seabed 6. A waterproof member combined with the member 12 is constructed. Then, an asphalt mastic is cast on the upper surface of the water-stopping member to form a mastic layer 20 having a predetermined thickness, thereby constructing a water-stop treatment layer 10 in a state where two types of water-stop layers are stacked. can do.

Apart from the above embodiments, as shown in FIG. 9, a mastic layer is formed on the surface of a foundation, and a water-stopping member in which a water-stopping sheet 11 and a mesh member 12 are overlapped is laid. An asphalt mastic is cast on the upper surface of the water-stopping member on the upper surface, and a mastic layer 20 having a predetermined thickness is constructed, whereby the water-stopping treatment layer 10 in a state where two types of water-stopping layers are stacked. Can be built. FIG. 9
When the mastic layer 19 is constructed on the surface of the foundation 5 as shown in (1), a treatment or the like for preventing the mastic from flowing down from the gap between the large stones is performed, and then the mastic is cast. The mastic layer 19 is formed such that mastic is attached to the surface of the stone. Then, the mastic layer is constructed as a layer capable of exhibiting water stopping properties, and since the surface of the mastic layer formed on the surface of the base is formed almost flat, a sheet is laid on the mastic layer. Can be easily performed.

Further, in the present embodiment, a water-stopping member in which a water-stopping sheet 11 and a mesh member 12 are integrated is laid on a mastic layer formed on the surface of the base, and the mesh member 12 is included. The asphalt mastic is cast as described above to construct the water-stop treatment layer 10 having a predetermined thickness. Therefore, in the water-stopping layer 10 constructed as described above, the mastic layer 19 on the lower surface can exhibit the water-stopping property, and the water-stopping layer 10 can exhibit the water-stopping action. Can be constructed as a water-stop layer in a state of being integrally stacked.

In the example shown in FIG. 9, a mastic layer 19 to be applied to the surface of the base rubble and a mastic layer 20 to be applied to the water-stop sheet in order to construct three water-stop layers in an overlapping manner. The two types of mastic layers are sandwiched between water-stop sheets, one consisting of directly casting asphalt mastic and the other consisting of laying an asphalt mat that has been subjected to a seam (joint) waterproof treatment. Any combination can be used. That is, as the upper and lower mastic layers 19 and 20 in this example, any combination of asphalt mat + asphalt mat, asphalt mastic + asphalt mastic, and asphalt mat + asphalt mastic may be used. Then, the mastic layers are placed on the upper and lower surfaces of the water-stopping sheet 11 so as to overlap with each other, and three water-stopping layers are formed, so that the water-stopping property can be favorably maintained. Further, in this embodiment, it is a matter of course that a net member may be disposed on the side of the water stopping sheet on which the asphalt mastic is cast, so that the net member can enter the asphalt mastic.

As shown in FIG. 9, in addition to forming a mastic layer on the surface of the foundation, a relatively thick woven or nonwoven fabric is laid as a fiber layer on the surface of the rubble foundation, and After covering the concave portions of the irregularities on the surface of the above, a water stopping sheet member having a net-shaped member disposed on both surfaces or the upper surface may be disposed. Further, after laying a net-like member such as a wire net having high strength on the lower surface of the fiber layer to reinforce the fiber layer, a water-stop sheet member combined with the net-like member is arranged on the fiber layer. It is also possible. Then, a mastic is cast at a predetermined thickness on the water-stopping sheet member to form a mastic layer in which the net-shaped member is integrated, thereby forming a double water-stopping layer. .

Further, in each embodiment of the present invention,
The net-shaped member arranged on the water-stop sheet member may be a multi-layer net-shaped member in addition to the one-layered one. It is also possible to fix it to the shape-like member and to lay the other upper net-like member later. When arranging the net-shaped members in a plurality of layers, the net-shaped members can be stacked so that the vertical and horizontal directions in the case of a wire mesh, or the bending or folding directions are alternately changed. Also, in the case of other types of net-shaped members, if the vertical and horizontal directions are clear, laying them so that the vertical and horizontal are alternately stacked can improve the strength of the net-shaped member against impact and the like of the polymer. it can. When the multilayer net-like members are arranged in an overlapping manner as described above, the multilayer net-like members can be integrated as a reinforcing member in the mastic layer to be cast later. It is possible to further increase the strength and improve the reliability of the water blocking layer.

As shown in FIG. 9, when the mastic layer 19 is formed on the surface of the foundation, the water-stop sheet member is directly laid on the planar surface of the mastic layer 19, and It is possible to build a heavy waterproof layer.
In addition, even when a double water-stop layer is constructed as described above, the water-stop performance of the mastic layer 19 and the water-stop sheet 11 can be favorably exhibited. The mastic layer 1
When laying the sheet 11 for waterproofing on the upper surface of 9, arrange | position an arbitrary anchor member or arrange | position the metal mesh member of a large eye in a pile for the stability of the sheet 11 for waterproofing. Is also possible.

Even when the water stoppage treatment layer 10 is constructed as shown in the above embodiment, an inconvenient state as shown in FIG. 10 may occur in a sea area where the seabed ground 6 is soft. . In the example shown in FIG. 10, the foundation rubble 5 is constructed on the improved ground 7, and the caisson 2 and the like are constructed thereon to form the revetment 1, but the ground subsidence is caused by the weight of the foundation rubble and the caisson. The portion 7a may be formed. Also, in the landfill 8 in which the waste is stacked, the ground subsidence 6a is generated on the seabed ground 6 due to the weight of the waste. The water submersion treatment layer 10 is given an action of being pulled from the end of the foundation rubble 5 toward the seabed subsurface ground 6 by the ground subsidence 6a, so that the asphalt mastic layer 20 and the water stop sheet 11 are provided. On the other hand, a large tension is applied. If a large tension is locally applied to the water-stopping layer 10, the water-stop sheet 11 may be torn to cause an obstacle that water-stopping cannot be maintained satisfactorily. Can be considered.

In order to maintain the performance of the water-stopping treatment layer 10, for example, as shown in FIG. 11, the water-stopping sheet 11a is made of rubber having a large elongation, and the mesh member 12 is By constructing with a highly elastic wire mesh,
It is also conceivable to secure water stoppage. In the example shown in FIG. 11, when the water-stop sheet 11a is made of a soft rubber having a large elongation, the water-stop sheet is prevented from being cut even in a state where a large tensile force is applied. it can. In addition, if the asphalt mastic to be applied on the waterproof sheet is made to have improved flexibility, it can easily deform when it is gradually pulled over a long period of time. The thin portion 10a is formed following the deformation of the above, and the water stoppage can be maintained without forming a tear or the like.

In the above embodiment, when the leveling accuracy of the surface of the foundation rubble is set to a value larger than ± 20 cm as in the case of the construction of a normal foundation, for example, construction in a deep sea area of 20 m or more. In some cases, a water-stopping layer is applied to the surface of the foundation having large irregularities without performing the work of leveling the surface of the foundation and keeping the foundation stones stacked. so,
Without leveling work, the unevenness of the foundation surface is ± 7
Since it is estimated to be about 0 cm, there may be a problem that the conventional sheet laying method cannot cope with the problem. Therefore, in order to deal with the above-described problem, a sheet member used in combination with a mesh member is
Thick woven or long-fiber nonwoven fabric with water permeability,
A water-stopping treatment layer can be constructed by constructing a material having an elongation percentage of 100% or more and placing an impermeable mastic on the upper surface and stacking the mastic.

As the sheet member, for example, 100
% Polyester woven fabric with a large elongation of more than
It is possible to use what is called a high elongation type sheet used for preventing scouring of the seabed. When the high elongation type sheet is laid on a surface with large irregularities and stones or the like are stacked from above, it stretches following the irregularities on the lower surface, so that it does not split and can maintain the function of covering the surface. Has characteristics. Then, an asphalt mastic is cast on the sheet so as to have a predetermined thickness, and a mastic layer including a mesh member such as a wire mesh arranged in combination with the sheet is formed, so that the waterproof layer can be easily formed. Can be built. The mastic cast on the surface of the sheet is not blocked by the sheet and does not flow to the lower surface, and is constructed as a water-stop treatment layer in which irregularities are formed along the surface of the foundation.

As described above, the sheet member in the example shown in FIGS. 7 and 8 is constituted by a high elongation type sheet.
By laying on the surface with large irregularities, the operation of forming the water-stopping layer can be easily performed. Further, the mesh member used in combination with the high elongation type sheet is made of a material having a large elongation rate such as a wire net using annealed iron wire, so that it can follow the elongation of the sheet to some extent. Thereby, the function as the water stop treatment layer can be maintained. Furthermore, even when coping with the land subsidence of the foundation and the landfill, when the sheet member having a large elongation is used and the mastic layer and the sheet are integrated, water stoppage treatment is performed by local land subsidence or the like. Even when uneven expansion and contraction are applied to the layer, the water stop treatment layer can be prevented from being damaged, and the same water stop effect as when a soft rubber sheet is used can be achieved.

Apart from the above embodiments, the water-stop treatment layer 1
In some cases, it is required that the water-stopping property at 0 is better exhibited. In such a case, asphalt mat 23 is overlaid on the upper surface of water-stopping treatment layer 20, as shown in FIG. Can be constructed. In the example shown in FIG. 12, first, as shown in FIG. 2, the water stopping sheet 11 and the mesh member 12 are integrated so as to cover the surface of the foundation rubble 5 and a predetermined area of the seabed ground 6. The waterproofing member is laid, and a mastic layer 20 is formed on the surface of the waterproofing sheet 11 with a predetermined thickness. Thereafter, an asphalt mat 23 is laid so as to cover the surface of the mastic layer 20, and an upper surface protective layer 21 as shown in FIG. And landfill 8 is created.

The example shown in FIG. 12 shows a case where the waste can be directly dumped in a state where the asphalt mat 23 is laid, but in a state where the asphalt mat 23 is laid on the mastic layer 20, When not affected by water pressure or waves, a large stone or rubble may be dropped and used as a hold without using a holding member for the asphalt mat 23. As described above, in the case where the water-stopping layer formed by casting the mastic layer and the water-stopping layer formed of the asphalt mat are superimposed and constructed, even in the layer of the asphalt mat 23, the water-stopping property is excellent. It is desirable to perform processing that can be demonstrated. In this case, as shown in FIG. 13, it is conceivable to perform a water stopping process on the joint between the asphalt mats.
As the connecting portion 24 between the three, a connecting means as shown may be used.

In the mat connection section 24, wires used for loading and unloading of the asphalt mat 23 are connected at the connection section 25, and a reinforcing member such as a mesh member 26 is arranged between the mats. And integrated with the asphalt mat on both sides. In addition, if necessary, the mat connection portion 24
One method is to lay a sheet 28 or the like on the lower surface over a predetermined range to reinforce it. Further, the member such as the reinforcing sheet is also arranged on the upper surface of the mat connection portion 24 to cope with the deformation of the mat and the waterproof layer due to the impact when the waste is dropped and the earth pressure of the landfill. You can also. When the asphalt mat 23 is laid on the upper surface of the mastic layer 20, an asphalt-based adhesive component is applied on the mastic layer, and then the mat is laid, so that a plurality of waterproof members are integrated. It is also possible to act as an aqueous layer.

[0039]

As described above, according to the present invention, in the present invention, the water shielding effect by the sheet and the mastic layer formed to a predetermined thickness in a state including the net-like member are doubled. A water blocking layer can be formed to exhibit good water shielding. Further, by arranging the net-shaped member in combination with the sheet-shaped water-stopping body, even if an impact is applied to the water-stopping layer, a force against the impact or the like can be exerted greatly. Furthermore, by arranging net-like members integrally on both surfaces of the sheet-like water-stop of the water-stop member,
Stability at the time of laying the sheet-shaped member can be improved, and workability can be favorably maintained.

In addition to the above-mentioned effects, by using the above-described constituent members, even when the surface of the foundation has large irregularities, the sheet-like member extends along the surface with large irregularities when a pressing force is applied from above. It is possible to easily form a water-stop layer in which the asphalt mastic layer is integrated without forming a gap. In addition, since the sheet-shaped water blocking body has no water permeability, it is possible to prevent contaminated water from leaking out of the partitioned area. Further, when the molten mastic is caused to flow toward the net-like member, the mastic is retained in a state where the mesh is clogged, so that the mastic layer forming operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a general configuration of a revetment.

FIG. 2 is an explanatory diagram of an example in which a water-stopping treatment layer is double-structured.

FIG. 3 is a plan view of a combination body of a sheet and a mesh member used for a water stoppage treatment layer.

FIG. 4 is a sectional view of the member of FIG. 3;

FIG. 5 is a plan view of a connection portion of the water blocking member.

FIG. 6 is a sectional view of FIG.

FIG. 7 is an explanatory view of a state in which a mastic layer is cast on a water-stop sheet.

FIG. 8 is an explanatory diagram of another example of the water stop treatment layer.

FIG. 9 is an explanatory diagram of an example in which a mastic layer is arranged on the lower surface of the water stop treatment layer to form a triple water stop layer.

FIG. 10 is an explanatory diagram in the case where land subsidence occurs.

FIG. 11 is an explanatory diagram of a deformation of a water stop treatment layer.

FIG. 12 is an explanatory view of another example of a triple water-stop treatment layer.

FIG. 13 is an explanatory diagram of a structure of a connecting portion of an asphalt mat.

[Explanation of symbols]

1 revetment, 2 caisson, 3 water stop, 5
Foundation rubble, 6 submarine ground, 7 improved ground,
8 landfill, 10 water stop treatment layer, 11 water stop sheet, 12 mesh member, 13 connection member,
15 superposed part, 16 adhesive layer, 17 mesh member connecting device, 18 lower surface mesh member, 20 mastic layer, 21 upper surface protective layer, 23 asphalt mat, 24 mat connecting portion, 25 wire connecting portion, 26 mesh member, 27 asphalt mastic, 28 sheets.

 ──────────────────────────────────────────────────続 き Continued on the front page (71) Applicant 000230711 Nihon Marine Construction Co., Ltd. 2-10-9 Akasaka, Minato-ku, Tokyo (71) Applicant 000196624 Seibu Polymer Kasei Co., Ltd. 1-13-118 Ikebukuro, Toshima-ku, Tokyo No. (72) Inventor Takka Waki 1-45-93 Futamatagawa, Asahi-ku, Yokohama-shi, Kanagawa Prefecture Inside World Engineering Co., Ltd. (72) Inventor Masami Orikasa 1-45-93 Watamatagawa, Asahi-ku, Yokohama-shi, Kanagawa (72) Inventor Mitsuru Nonoda 2-11-20 Tamagawa, Ota-ku, Tokyo Japan Road Co., Ltd. (72) Inventor Takahiko Ito 3-13-1 Kyobashi, Chuo-ku, Tokyo Taisei Rotec Co., Ltd. (72) Inventor Katsuo Matsuzaki 2-10-9 Akasaka, Minato-ku, Tokyo Nippon Marine Construction Co., Ltd. (72) Inventor Hiroshi Nakano Tokyo 2-10-9, Akasaka-ku Nihonkai Marine Construction Co., Ltd. (72) Inventor Mitsumasa Inomata 1-13-18 Ikebukuro, Toshima-ku, Tokyo Seibu Polymer Kasei Co., Ltd. F-term (reference) 2D018 DA02 DA03 4D004 AA46 BB04 BB05 CC11 CC16

Claims (10)

[Claims] Claims: 1. A surface of a base rubble of a reclaimed revetment constructed from a base rubble on a seabed ground, and a water impermeable structure constructed over a predetermined range of the seabed ground, wherein the surface of the base rubble and the seabed ground are provided. Over a predetermined range of
Laying a sheet-like water stopping body and a water stopping member by a net-like member superimposed on the upper surface thereof, forming a mastic layer on the water stopping member, forming the net-like member in a state including the net-like member inside the mastic layer. A water barrier structure of a revetment, which is constructed by stacking multiple waterproof layers. 2. A surface of a foundation rubble of a reclamation seawall constructed by rubble foundation on the seabed ground, and a water-blocking structure constructed over a predetermined range of the seabed ground, wherein the surface of the foundation rubble stone and the seabed ground Laying a net-shaped member over a predetermined range of the above, laying on the upper surface of the net-shaped member, a sheet-shaped water-stopping body and a water-stopping member made of a net-shaped member to be superimposed on the upper surface thereof; A water barrier structure of a seawall, comprising forming a layer, forming a net-like member on the upper surface of the sheet-like water blocking body inside the mastic layer, and stacking and forming a multilayer water blocking layer. . 3. A surface of a base rubble of a reclamation seawall constructed by rubble on a seabed ground and a water-blocking structure constructed over a predetermined range of the seabed ground, wherein the surface of the base rubble and the seabed ground are provided. Over a predetermined range of
Laying a sheet-like water stopping body and a water stopping member combining a net-like member on one or both of the upper and lower surfaces thereof, constructing a mastic layer on the water stopping member, and forming a net on the upper surface of the sheet-like water stopping body A water barrier structure for a revetment, wherein the watertight structure is formed by including a mast-like member inside the mastic layer and stacking a plurality of waterproof layers. 4. A water-blocking structure constructed over a predetermined area of a reclamation seawall, wherein the surface of the foundation rubble is constructed by using a mastic. Casting, or covering with a mastic layer constituted by laying an asphalt mat, over a predetermined range of the upper surface of the mastic layer and the seabed, water-stopping by combining a sheet-like water stopping body and a net-like member on the upper surface thereof Arranging the members, constructing a mastic layer on the sheet-like water stopping body, forming a net-like member on the upper surface of the sheet-like water stopping body so as to be included in the mastic layer, a multilayer water stopping layer Water barrier structure of revetment characterized by stacking. 5. A water-blocking structure constructed over a predetermined area of a submarine ground, comprising: a surface of a basic rubble of a reclamation revetment constructed of basic rubble on the seabed ground; Casting or covering with a mastic layer constructed by laying an asphalt mat that has been subjected to joint water stoppage treatment, over a predetermined range of the upper surface of the mastic layer and the seafloor ground, a sheet-like water stopping body and one of upper and lower sides thereof A water-blocking member in which a net-shaped member is combined on one or both surfaces, and an asphalt mat is laid on the sheet-shaped water-blocking body, thereby forming a multilayer water-blocking layer. Construction. 6. A water-blocking structure constructed over a predetermined area of a reclamation seawall, wherein the surface of the foundation rubble is constructed by using a mastic. Casting or covering with a mastic layer constituted by laying an asphalt mat which has been subjected to joint water stoppage treatment, over a predetermined range of the upper surface of the mastic layer and the seabed ground, a sheet-like water stopping body or net Laying a sheet-like water-stopping body in which the shape member is disposed on one or both of the upper and lower surfaces, and forming two water-stopping layers by the mastic layer and the water-stopping sheet so as to form a seawater barrier. Construction. 7. A surface of a foundation rubble of a reclamation seawall constructed by rubble of a foundation on a seabed ground and a water-blocking structure constructed over a predetermined range of the seabed ground, wherein a nonwoven fabric or a nonwoven fabric is provided on the surface of the foundation rubble. Laying a fiber layer of a woven fabric, laying a sheet-shaped water blocking body in which a net-shaped member is arranged on one or both of the upper and lower surfaces thereof over a predetermined range of the surface of the fiber layer and the seabed, Constructing a mastic layer on the water stopping body, forming a net-like member on the upper surface of the sheet-shaped water stopping body in a state including the inside of the mastic layer, and configured by stacking multiple water stopping layers. Water barrier structure of revetment. 8. The fiber layer according to claim 7, wherein the fiber layer is a woven or non-woven member having water permeability, and is made impermeable by covering an asphalt mastic on an upper surface thereof. Seawall structure of seawall. 9. The water barrier structure of a seawall according to claim 1, wherein the sheet-like water blocking body is a water blocking sheet made of rubber or plastic material. 10. The net-like member combined with the sheet-like water stopping body is a wire mesh, a mesh-like metal member, or a mesh member of a synthetic fiber, an artificial fiber, or a natural fiber, and is formed integrally with the sheet-like member. The water barrier structure of a revetment according to any one of claims 1 to 7, wherein: