JP2000248528A - Impervious layer forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the labor or the time required for forming an impervious layer on a slant face. SOLUTION: A forming device 10 for an impervious layer is provided with mutually joined impervious sheets 12 which have the property of self hardening and which is defined a filling space 18 for slurry indicated non-permeability or low-permeability in a solidifying state, and a sheet shaped mesh 14. The impervious sheets 12 and the mesh 14 are further joined at the other place 20 to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for forming a water-impermeable layer, which is a water-impermeable or low-water-permeable layer, on the ground, particularly on a slope such as a slope.

[0002]

2. Description of the Related Art Conventionally, in order to prevent harmful substances from penetrating into the soil at a waste disposal site, self-hardening and solidification are performed on a slope such as a sloped wall of a hole which is a waste dumping space. A frame body that is placed on the slope and extends along the slope, and covers an open surface of the frame body to form a water-impervious layer made of a solidified slurry of a slurry exhibiting water impermeability or low water permeability in a state. A mold device including a lid is installed, and the slurry is poured into the mold device.

[0003] However, this has the disadvantage that a great deal of effort and time is required to install and remove the formwork device.

In the formation of a water-blocking layer using the formwork device, the slurry cast in the formwork device passes along a slope between the lower portion of the slope and the formwork device. In order to push up the formwork device upward, it is necessary to fix the formwork device to the slope using anchor means in order to prevent this.

[0005] However, the anchor member must be of a relatively large size and must be strong to be driven deeply, and this requires an anchoring machine and the installation of a scaffold to support it. Therefore, a large amount of labor and time are required for fixing the formwork device to the slope.

[0006]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to reduce the labor or time required to form a water barrier on a slope.

[0007]

According to the present invention, there is provided an apparatus for forming a water-blocking layer, which comprises a self-hardening and non-water-permeable or low-water-permeable slurry in a solidified state. The water impermeable sheet and the mesh are further joined to each other at a plurality of other locations.

[0008] Instead of joining the water-impervious sheet and the mesh at a plurality of other places, they may be connected to each other with a thread at a plurality of places.

Further, a plurality of meshes may be joined to the water-blocking sheet to have a plurality of slurry filling spaces. In this case, the plurality of meshes can be further joined to each other.

In order to define the slurry filling space,
Instead of the water-impervious sheet and the mesh, a pair of water-impervious sheets may be used, and the two water-impervious sheets may be connected to each other at a plurality of locations with a thread.

Another water-impervious layer forming apparatus includes a water-impervious sheet and a plurality of threads for joining the water-impervious sheet to the ground, wherein the water-impervious sheet cooperates with the ground to form the slurry. May be defined.

[0012]

According to the present invention, any apparatus for forming a water-impervious layer may be wound on a roll and released for use to form the water-impervious layer. The device can be easily and quickly installed by laying on the ground. In the forming apparatus having a sheet-like or a plurality of meshes, the mesh is laid on the ground, and then the slurry is filled in a space defined by the mesh and the water-impervious sheet to thereby impermeate water. Layers can be formed.

The water-blocking sheet and the sheet-like mesh are joined at a plurality of places or connected by a thread, whereby both are restrained by one another. For this reason,
The space between the impermeable sheet and the mesh accompanying the filling of the slurry is limited so as to be uniform throughout. Therefore, when the forming apparatus is disposed on the slope to form a water-impervious layer on the slope, the slurry that fills the space is excessively accumulated at the lower part of the slope and the water-impervious sheet associated therewith. Swelling is suppressed. As a result, a substantially impermeable layer (solidified slurry) can be obtained. The same applies to the case where the space filled with the slurry is formed by a pair of water-impermeable sheets, the case where the space is formed by a water-impermeable sheet and a plurality of meshes, and the case where the water-impermeable sheet is constrained on a slope.

[0014] The mesh facing the ground, the lower one of the pair of impermeable sheets, and the yarn are each buried in the slurry. In addition, the water impermeable sheet on the upper side can be used as a protective layer of the water impermeable layer. For this reason, the apparatus of the present invention does not require a demolding operation as in the related art. In addition, there is no need to perform an anchoring operation for fixing the formwork to the inclined surface in the related art. From this, it is possible to further reduce the construction period required for forming the impermeable layer, reduce the construction cost, and the like. Further, the upper water-shielding sheet blocks the curing of the slurry from the outside air and suppresses the water evaporation. For this reason,
Drying shrinkage of the solidified product of the slurry is suppressed, whereby a high-quality water-impermeable layer having excellent water-impermeability can be obtained.

[0015] The mesh and the lower impermeable sheet are each free to deform following the unevenness of the ground, so that the flat impermeable sheet having substantially the same thickness is also formed on the uneven ground. Layers can be obtained. In addition, since the slurry seeping out of the mesh has a function of firmly adhering the mesh to the slope, a water-blocking layer integrated with the slope can be obtained.

With any of the above-described devices, the water-impervious layer can be similarly formed on both a slope having a constant slope where the inclination angle does not change and a slope where the inclination angle changes.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, for example, on a slope or a bottom surface defining a waste dumping hole in a waste disposal site, self-hardening and non-permeable or low-permeable water in a solidified state. An example of a forming apparatus used for forming a water barrier layer made of a solidified slurry of the slurry shown is indicated by reference numeral 10 as a whole.

The forming apparatus 10 includes a water-impervious sheet 12 and a sheet-like mesh 14 disposed below and below the water-impervious sheet, and the water-impervious sheet 12 and the mesh 14 At 16 they are joined together.

The impermeable sheet 12 and mesh 14 joined together define a filling space 18 for the slurry therebetween. Impermeable sheet 12 and mesh 14
Are further joined to each other at a plurality of other points 20, whereby the slurry filling space 18 is formed.
Are divided into a plurality of chambers 22 communicating with each other.

The illustrated forming apparatus 10 further has two openings 24 communicating with the filling space 18.
The slurry can be injected into the filling space 18 through the nozzle 4. Therefore, the forming apparatus 10 forms a bag with both openings 24 as open ends.

The water-blocking sheet 12 is made of a material such as synthetic rubber, butyl rubber, polyolefin-based thermoplastic elastomer, high-density polyethylene, and urethane. The mesh 18 is made of synthetic fiber such as polyethylene fiber, and allows a part of the slurry to leak, but can hold the slurry and has a mesh size of, for example, 1-10.
It has a mesh size in the range of mm.

The mutual bonding at the edges of the water-blocking sheet 12 and the mesh 14 and the mutual bonding at the plurality of locations 20 can be performed by heat fusion, bonding with an adhesive or the like.

When forming the impermeable layer on the slope 26 or the bottom surface 28 (see FIGS. 10 and 13) of the waste dumping hole, the forming apparatus 10 is laid on the slope 26 or the bottom surface 28 to cover the same. And then the filling space 1 of the forming device 10
8 is filled with the slurry. The forming device 10 is laid with the mesh 14 down, that is, with the mesh 14 facing and contacting the slope 26 or bottom surface 28. The filled slurry is cured in the filling space, and the solidified slurry forms the impermeable layer.

After the water-impervious layer is formed on the bottom surface 28, it is formed on each slope 26 (see FIGS. 10 to 12).
Alternatively, after being formed on each slope 26, it can be formed on the bottom surface 28 (see FIGS. 13 to 15).

The bottom surface 28 of the dumping hole has a generally rectangular planar shape, and the inclined surface 26 has a trapezoidal planar shape sharing each side of the rectangular shape. Alternatively, it may have a plane shape substantially the same as the plane shape of the slope.

Alternatively, a plurality of forming devices 10 smaller than the surface area of the bottom surface 28 or the slope 26 may be prepared, and these forming devices may be laid on the bottom surface or the slope so as to cover them.

When a water impermeable layer 32 (FIG. 12) is formed on the slope 26 after the water impermeable layer 30 is formed on the bottom surface 28, the water impermeable sheet 12 of the forming apparatus 10 laid on the slope 26 is used. At the top of the water-blocking layer 30, it is bonded to the water-blocking sheet 12 covering the water-blocking layer 30 on the bottom surface 28 so that the slurry filled in the forming apparatus does not leak (see a bonding portion indicated by reference numeral 34). ). Thereafter, the slurry is filled into the forming device 10 on the slope 26. The filled slurry is
It is blocked by the impermeable layer 30 on the bottom surface and the impermeable sheet 12 on the slope 26 near the joint 34 between the impermeable sheets.

Conversely, when the impermeable layer 32 is first formed on the slope 26, a ridge 36 extending in advance along the intersection line between the bottom surface and the slope 26 is formed on the bottom surface 28 in advance. Ridge 36
Is made of the same material as the water-impervious layer formed on the bottom surface 28 later, and forms a part of the water-impervious layer later. The ridge 36 can be formed by installing an appropriate mold (not shown) and pouring the slurry into the mold.

Next, the forming apparatus 10 is laid on the slope 26.
At this time, the forming device 10 contacts the ridge 36 at the lower part of the slope 26. Thereafter, the slurry is filled in the forming apparatus 10. The slurry is blocked by the ridge 36 and a part of the water-blocking sheet 12 adjacent to the ridge 36. Preferably, as for the forming device 10 disposed on the slope 26, a device having a size whose waterproof sheet 12 covers the ridge 36 is used.

The mesh 14 of the forming apparatus 10 fills the filling space 18 defined by the mesh and comes into close contact with the slope 26 or the bottom surface 28 due to the weight of the slurry placed on the mesh 14. In addition, a part of the filled slurry leaks out of the mesh 14 and fills a gap between the mesh and the inclined surface 26 or the bottom surface 28.

On the other hand, when the filling space 18 is filled with the slurry, the impermeable sheet 12 is restricted from rising due to restraint by bonding with the mesh 14 at a plurality of locations 20. For this reason, the slurry is prevented from excessively accumulating at one location in the forming apparatus 10 and the swelling or swelling at one location due to this is prevented. As a result, the water-blocking layers 30, 32 having a uniform thickness as a whole are obtained. Further, in the water impermeable layer 32 on the slope 26, the degree of swelling on the lower part of the slope 26 is very small.

Further, since the slurry during curing is covered with the water-blocking sheet 12, excessive evaporation of water in the slurry is suppressed, whereby drying and shrinkage of solidified material of the slurry is suppressed, and The water-impervious layers 30, 32 excellent in water-impermeability and quality can be obtained.

In the example shown in FIG. 1, the plurality of joints 20 between the water-blocking sheet 12 and the mesh 14 extend in the horizontal direction, but may extend in the vertical direction, for example. .

Also, instead of the example shown in FIG. 1 using a single mesh 14, a plurality of meshes 1 shown in FIGS. 2 and 3, FIGS. 4 and 5, and FIGS.
4 can be used as the forming apparatus 10. In addition, these forming apparatuses 10 were arranged on the slope 26 for convenience of illustration and description.

In the example shown in FIGS. 2 and 3, the plurality of meshes 14 each have a tubular shape, and the plurality of tubular meshes 14 are arranged in parallel with each other and joined to the water-blocking sheet 12. The two furthest meshes 14 extend along both opposing edges of the impermeable sheet 12. In this example, cylindrical meshes 14 adjacent to each other are further joined to each other.

In this forming apparatus 10, a space 18 defined by each tubular mesh 14 and a waterproof sheet 12 that closes a part of an eye of the mesh 14 by joining, and both adjacent meshes 14 and a waterproof sheet are defined. A space 18 defined by 12 forms a filling space for the slurry.

The tubular mesh 14 is joined at its open end to the edge of the impermeable sheet 12 and is closed. Further, the cylindrical mesh 14 is provided with a slope 26.
May extend in either the vertical direction or the horizontal direction.

When the forming apparatus 10 is placed on the slope 26, it is in a flat state (FIGS. 2, 4 and 6), and becomes thicker by filling the space 18 of the apparatus 10 with the slurry. In this state, the slurry is cured and solidified (FIGS. 3, 5, and 7).

In the example shown in FIGS. 4 and 5, the meshes 14 are arranged at intervals from each other, and cooperate with the water-shielding sheet 12 to define a tubular body.
Is joined to. In this example, each cylinder defines a filling space 18 for the slurry. In each space defined by the impermeable sheet 12 and the slope 26 between the meshes 14, a part of the slurry filled in the filling space 18 leaks out of the mesh 14 and fills it (FIG. 5).

The forming apparatus 10 shown in FIGS. 6 and 7 is common to the apparatus shown in FIGS. 2 and 3 in that each mesh 14 has a cylindrical shape. The difference is that each mesh 14
Are not joined to each other but are spaced apart from each other.

A plurality of parallel ridges 38 similar to the ridges 36 shown in FIGS. 13 to 15 are formed on the slope 26 in advance, and when the apparatus 10 is laid, the waterproof sheet of the apparatus is used. 12 is placed on the ridge 38, each mesh 14
Of the slurry into the mesh 14 can be performed more easily and more quickly.

Next, referring to FIGS. 8 and 9, FIG.
, Ie, the example of the forming apparatus in which the sheet-like mesh 14 is joined to the water-blocking sheet 12 at a plurality of locations 20, The impermeable sheet 10 connected by the thread 40 is shown.

Each of the yarns 40 has a ring shape and is arranged at an interval from each other. Each of the ring-shaped yarns 40 is partially joined to the water-impervious sheet 12, and the other part passes through the mesh of the sheet-shaped mesh 14 and is hooked thereon.

When the slurry is filled in the filling space for the slurry, which is defined between the water-impervious sheet 12 and the sheet-like mesh 14, the yarn 40 is in contact with the mesh 14. 12 and mesh 1
4 limits the distance that the impermeable sheet 12 can be separated. From this, the impermeable layer 32 having a certain thickness dimension (FIG. 9)
Is formed.

The yarn 40 is freely deformable and non-permeable, and can be formed of a plastic material, a synthetic rubber material, a metal material, or the like. The yarn 40 may be a straight line instead of the illustrated example having a ring shape. In this case, both ends of the yarn 40 are joined to the impermeable sheet 12 and the mesh 14, respectively. The thickness of the thread 40 can be arbitrarily selected. Further, the yarn 40 is formed by the impermeable sheet 12 and the mesh 14
Has a tensile strength that can maintain the interval between

As shown in FIGS. 16 and 17,
Instead of the above example using a sheet-like mesh 14,
The apparatus 10 can be configured using a water-blocking sheet 42 similar to the water-blocking sheet 12. Both impermeable sheets 12, 42
Represents a plurality of linear yarns 4 spaced from each other
4 interconnected therebetween and define a filling space 18 for the slurry therebetween. The yarn 44 is preferably made of the same material as the water impermeable sheets 12, 42, and is joined to the water impermeable sheets 12, 42 at both ends of the yarn 44, respectively.

Further, as shown in FIG. 18 and FIG. 19, the apparatus 10 including the water-impervious sheet 12 and the plurality of yarns 44 without using the sheet-like mesh 14 or the water-impervious sheet 42 can be provided.

In this example, the plurality of yarns 44 are
2 along the edge and in the area surrounding said edge. One end of each thread 44 is joined to the impermeable sheet 12, and the other end is fixed to the slope (ground) 26, whereby the impermeable sheet 12 is joined to the slope 26 and cooperates with the slope 26. A filling space 18 for the slurry is defined. The fixing of each thread 44 to the slope 26 is performed at the other end of each thread 44 via a suitable anchor member 46.

The plurality of yarns 44 arranged along the edge of the impermeable sheet 12 are densely arranged at small intervals to prevent or reduce the leakage of the slurry from the space 18. On the other hand, the plurality of yarns 44 extending in the filling space 18 are coarsely arranged at large intervals. The plurality of threads 44 function to restrain the impermeable sheet 12 on the slope 26.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of a water barrier layer forming apparatus according to the present invention.

FIG. 2 is a partial cross-sectional view of a water barrier layer forming apparatus of another example.

3 is a partial cross-sectional view of the impermeable layer forming apparatus shown in FIG. 2 in a state where the slurry is filled and solidified.

FIG. 4 is a partial cross-sectional view of a water barrier layer forming apparatus according to still another example.

5 is a partial cross-sectional view of the impermeable layer forming apparatus shown in FIG. 4 in a state where the slurry is filled and solidified.

FIG. 6 is a partial cross-sectional view of a water barrier layer forming apparatus according to still another example.

7 is a partial cross-sectional view of the impermeable layer forming device shown in FIG. 6 in a state where the slurry is filled and solidified.

FIG. 8 is a partial cross-sectional view of a water barrier layer forming apparatus according to still another example.

9 is a partial cross-sectional view of the impermeable layer forming device shown in FIG. 8 in a state where the slurry is filled and solidified.

FIG. 10 is a partial vertical cross-sectional view of the waste dumping hole in a state where a water-impermeable layer is formed on the bottom surface of the hole.

FIG. 11 is a partial vertical cross-sectional view of the hole for showing a state where the water barrier layer forming device of the present invention is arranged on the slope of the hole for dumping waste.

FIG. 12 is a partial longitudinal sectional view of the hole in a state where a water barrier layer is formed on a slope.

FIG. 13 is a partial longitudinal sectional view of the hole showing a state in which a ridge is formed on the bottom surface of the hole in order to form a water barrier layer on the slope of the hole for dumping waste.

FIG. 14 is a partial longitudinal sectional view of the hole showing a state where the water barrier layer forming apparatus of the present invention is arranged on a slope.

FIG. 15 is a partial longitudinal sectional view of the hole in a state where a water barrier layer is formed on a slope.

FIG. 16 is a partial cross-sectional view of a water barrier layer forming apparatus according to still another example.

17 is a partial cross-sectional view of the water barrier layer forming apparatus shown in FIG. 16 in a state where the slurry is filled and solidified.

FIG. 18 is a partial cross-sectional view of a water barrier layer forming apparatus according to still another example.

19 is a partial cross-sectional view of the water barrier layer forming apparatus shown in FIG. 18 in a state where the slurry is filled and solidified.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Water-blocking layer forming apparatus 12, 42 Water-blocking sheet 14 Mesh 16, 20 Joint 18 Slurry filling space 26, 28 Slope and bottom (ground) of hole 30, 32 Water-blocking layer 40, 44 Yarn

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Naoto Hamada 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo head office (72) Inventor Taku Ohbori 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Stock Company Kumagaya Gumi Tokyo Head Office (72) Inventor Takahiro Shimizu 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office F-term (reference) 2D018 DA03 4D004 AA46 BB04 BB05

Claims (6)

[Claims] 1. A water-impervious sheet and sheet-like mesh which are joined to each other and define a filling space for a slurry which is self-hardening and exhibits a water-impermeable or low-water-permeability in a solidified state, An apparatus for forming a water-blocking layer, wherein the sheet and the mesh are further joined to each other at a plurality of other locations. 2. A water-impervious sheet and sheet-like mesh which are joined to each other and define a filling space for a slurry which is self-hardening and exhibits a water-impermeable or low-water-permeability in a solidified state, The sheet and the mesh,
In addition, a device for forming a water-impervious layer, which is connected to each other at a plurality of locations by a thread. 3. A water-impervious sheet and a plurality of meshes joined to the water-impervious sheet that define a filling space for a slurry that is self-hardening and that is impermeable or low-permeable in a solidified state. , Impermeable layer forming equipment. 4. The apparatus of claim 3, wherein said plurality of meshes are joined together. 5. A water-impermeable sheet comprising a pair of water-impermeable sheets defining a filling space for a slurry which is self-hardening and exhibits a water-impermeable or low-water-permeability property in a solidified state, and both of the water-impermeable sheets are provided at their edges. A device for forming a water-blocking layer, which is joined to each other and connected to each other by a thread at a plurality of other points. 6. A waterproof sheet comprising a waterproof sheet and a plurality of yarns for joining the waterproof sheet to the ground, wherein the waterproof sheet cooperates with the ground to have self-hardening properties and impermeability in a solidified state. For forming a water-impervious layer, which defines a filling space for a slurry exhibiting water permeability or low water permeability.