JP4943768B2 - Water stop method and water stop panel - Google Patents

Description

  The present invention relates to a water stop method and a water stop panel using a water stop material containing bentonite.

  Conventionally, as a method for forming a water-stopping layer on a slope or the like, a spraying method in which a water-stopping material having adhesion is sprayed on a construction surface is known. The spraying method is roughly classified into a so-called wet spraying method and a dry spraying method.

  The wet spraying method is to knead the main material (for example, bentonite) and water, press the water-stopping material prepared in advance through the hose, and spray it onto the construction surface from the nozzle provided at the tip of the hose. This is a method for forming a water-stopping layer. On the other hand, the dry-type spraying method is a method of mixing with water when air-kneaded powdery main material is pumped through a hose and sprayed from the nozzle provided at the tip of the hose to the construction surface. This is a method of forming a water stop layer by attaching a water stop material to the construction surface.

  In general, the wet spraying method is widely used as a spraying method because it has features such as easy adjustment of the mixing ratio of the main material and water and good adhesion of the water-stopping material. ing.

However, since the wet spraying method is inferior in pumpability, for example, a high water-stopping property is required for the construction surface, and when the viscosity of the water-stopping material has to be high, there is a problem that the workability is inferior. is there. On the other hand, the dry spray method is inferior to the wet spray method in terms of adhesion of the water-stopping material, and it is difficult to adjust the blending ratio. In situations where the viscosity of the water-stopping material is inevitably high, the use of the dry spray method is recommended. As a dry spraying method using bentonite, for example, a method described in Patent Document 1 is known.
Japanese Patent No. 3494397

  However, the dry-type spraying method described in Patent Document 1 is intended to stop water using the adhesiveness of bentonite, and there is room for improvement in order to sufficiently suppress water discharge from the construction surface. It was.

  Moreover, the said dry-type spraying method forms a water stop layer by making an inclined surface (slope) into a construction surface, for example, does not form a water stop layer with respect to the construction surface standing in the perpendicular direction. It was. If an attempt is made to form a water stop layer on a construction surface erected by such a dry spray method, the water stop material may flow down due to its own weight. As described above, the conventional spraying method has a problem that it is difficult to reliably attach the water-stopping material to the construction surface, and the work cannot be performed sufficiently efficiently.

  In addition to the above-described spraying method, there is a sheet method that prevents water leakage by hitting a sheet on a construction surface using a nail or the like. However, this sheet construction method has a problem that water leakage from the nail driving portion and the sheet seam is remarkable, and it is difficult to completely prevent water leakage. In the case of the sheet construction method, the maintenance work of the sheet after construction has been a burden.

  The present invention has been made in view of such a situation, and it is possible to efficiently form a water stop layer that can sufficiently prevent water from entering the construction side and sufficiently prevent water from entering the structure. An object of the present invention is to provide a water stop method and a water stop panel that can sufficiently reduce the burden of maintenance work related to water stop after completion of the structure.

The water stop construction method according to the present invention is to fix a cell-structured panel comprising a plurality of holes penetrating in the thickness direction, partition walls separating adjacent hole parts, and perforations provided in the partition walls. A panel installation process that is installed on a construction surface that requires water treatment, a water stop material containing bentonite is filled in the cell, and a water stop layer formation process that forms a water stop layer with the panel and the water stop material, A structure installation step of bringing the structure into contact with the water blocking layer.

  The water-stop material used in the water-stop method of the present invention contains bentonite and has a property of swelling when water is absorbed. A water-stopping layer that encloses a panel having a cell structure is formed between the construction surface and the structure using a water-stopping material having such properties. Thereby, the water stop material which comprises a water stop layer with the panel of a cell structure will be arrange | positioned between a construction surface and a structure in the state divided into the small area | region by the partition of the panel of a cell structure. .

  By forming the water stop layer having such a configuration, water stop from the construction surface can be suppressed, and water intrusion to the structure side can be prevented. The main reasons for such an effect are as follows. In other words, the water-stopping material swells when it absorbs water from the construction surface, but the water-stopping material placed between the construction surface and the structure is partitioned by the partition walls of the cell structure panel. Swell in the thickness direction of the water-stopping layer. When the water-stopping material swells in this direction, a pressure is generated in the direction of pressing the construction surface, and water discharge from the construction surface is suppressed by this pressure. In addition to this, the swollen water-stopping material penetrates into a water discharge portion (for example, a crack or a highly water permeable layer) on the construction surface, thereby suppressing water discharge from the construction surface.

  Since the water-stopping action as described above is caused by the water-stopping material absorbing water and swelling, the burden of maintenance work after the completion of the structure can be sufficiently reduced.

In the present invention, from the viewpoint of workability facilities Engineering, construction surface is a surface extending in inclined or vertical direction is performed by spraying the filling of water stopping material into the cell.

  The panel used in the present invention has a cell structure in which a water-stopping material is accommodated and can be held. For this reason, it can fully prevent that the water stop material hold | maintained at the panel of the cell structure flows down by dead weight, or peels off by adhesiveness shortage. Therefore, even if the construction surface is not a substantially horizontal surface, the water stop layer can be reliably formed with high work efficiency.

  In the water stop construction method of the present invention, it is preferable to use a water stop material further containing at least one of sand and gravel. In addition to bentonite, the mechanical strength and density of the water-stopping material can be increased by incorporating sand and / or gravel into the water-stopping material. Thereby, the water stop performance of the water stop material can be improved.

From the viewpoint of the water stop performance of the water stop material, the composition of the water stop material is 100 parts by weight or less of the total amount of sand and gravel when the bentonite is 100 parts by weight, and the water content ratio of the water stop material is 15 to 30. % Is preferred. In addition, the water content ratio w (%) of the water stop material is defined by the following formula (1). In the formula, W _w represents the mass of water contained in the water-stopping material, and W _s represents the mass of solids such as bentonite, sand, and gravel contained in the water-stopping material.
w = (W _w / W _s ) × 100 (1)

Moreover, the water stop panel which concerns on this invention is arrange | positioned between the construction surface which requires a water stop process, and a structure, and is used in order to prevent that the water from a construction surface permeates into the structure side. A panel of a cell structure comprising a plurality of holes penetrating in the thickness direction, partition walls partitioning between adjacent hole parts, and perforations provided in the partition walls, and containing bentonite And a water stop material filled in the hole of the panel having the cell structure.

  According to the water stop panel of the present invention, a water stop layer having the same water stop performance as the water stop layer formed by the water stop method can be formed very easily. That is, a water stop layer can be formed by arranging the water stop panel on a sufficiently flat construction surface.

The water stop construction method of the present invention when using the above water stop panel is as follows. That is, the water stop construction method of the present invention is a panel having a cell structure comprising a plurality of holes penetrating in the thickness direction, partition walls separating adjacent hole parts, and perforations provided in the partition walls, A water stop panel installation process for installing a water stop panel containing bentonite and a water stop material filled in a hole of the cell structure panel on a construction surface that requires water stop treatment; A structure installation step of bringing the structure into contact with the water panel. If a flat water-stopping panel is used in such a water-stopping construction method, it is possible to very easily form a water-stopping layer on a sufficiently flat construction surface.

  According to the water-stop method and the water-stop panel according to the present invention, it is possible to efficiently form a water-stop layer that suppresses water discharge from the construction surface and sufficiently prevents water from entering the structure side. After the completion of, maintenance work related to water stop can be reduced sufficiently.

  Hereinafter, preferred embodiments of a water stop method and a water stop panel according to the present invention will be described in detail with reference to the drawings. For the convenience of the drawings, the dimensional ratios in the drawings do not necessarily match those described.

(First embodiment)
The first embodiment of the water stop method according to the present invention will be described by taking as an example the case of constructing an underground tunnel.

  FIG. 1 is a cross-sectional view showing an underground road structure constructed by adopting the water stop method according to the present invention, and FIG. 2 is a cross-sectional view showing a partially enlarged view of FIG.

  As shown in FIG. 1, the underground road structure (structure) 20 according to the present embodiment is constructed between two water-stop layers 5. The underground road structure 20 includes a tunnel frame 1 disposed between two water-stopping layers 5 and two mortar walls 3 formed between the tunnel frame 1 and the water-stopping layer 5. A water blocking wall 10 is constructed outside the water blocking layer 5.

  As shown in FIG. 2, the water blocking layer 5 is provided between the water blocking wall 10 and the mortar wall 3, and the water blocking layer 5 contacts the construction surface 10 a of the water blocking wall 10. This construction surface 10 a is a construction surface that requires a water stop treatment, and the inner surface side of the water stop layer 5 is in contact with the contact surface 3 a of the mortar wall 3. In addition to the construction surface where water such as groundwater is actually discharged, the “construction surface requiring water stop treatment” is not allowed to be discharged at present, but depending on the time, water may be discharged or will be discharged in the future. It means that there is something that might be feared.

  Next, the water blocking layer 5 described above will be described in detail. The water blocking layer 5 is composed of a panel 7 having a cell structure and a water blocking material 9. As shown in FIG. 3, the cell-structured panel 7 is composed of a plurality of cells 8 arranged vertically and horizontally, and has a lattice-like structure. Each cell 8 includes a hole portion 8a penetrating in the thickness direction of the panel 7 and a partition wall 8b that partitions the adjacent hole portions 8a.

  The partition wall 8b of the panel 7 is provided with perforations 8c. The perforation 8c is a flow path used for releasing compressed air when the water-stopping material 9 is sprayed. By providing the perforations 8c, the water-stopping material 9 can be sprayed more efficiently.

  The panel 7 may be of a suitable thickness and cell size depending on the conditions of the place where it is installed and the water-stopping material used. Typical examples of the dimensions of the panel 7 are 1200 mm in length, 700 mm in width, 100 mm in thickness, and the cell lattice size is 100 mm in length and 100 mm in width.

  As a material of the panel 7, what has the mechanical strength which can hold | maintain the water stop material 9 in the cell 8, and the workability for installing along the shape of the construction surface 10a is preferable. Moreover, since the panel 7 is used in a state of being included in the water-stopping material 9, it is more preferable that the panel 7 is made of a material that does not chemically act on bentonite and other materials included in the water-stopping material 9. Suitable materials include, for example, corrosion resistant metals such as stainless steel, organic polymer materials such as high density polyethylene, and the like. When the panel 7 is configured using these materials, the thickness of the partition wall 8b may be in the range of 1 to 5 mm.

  Next, the water stop material 9 will be described. The water stop material 9 contains bentonite. Although the kind of bentonite to be used is not particularly limited, coarse bentonite is preferable from the viewpoint of water stoppage, and the particle diameter is more preferably 10 mm or less.

  As the water stop material 9, bentonite may be used alone, but a material further containing at least one of sand and gravel may be used. In addition to bentonite, the water-stopping material containing sand and / or gravel has improved mechanical strength and a higher density than the water-stopping material 9 not containing sand or gravel. Thereby, the water stop property of the water stop layer 5 can be further improved. From the viewpoint of work efficiency, it is preferable to use sand and gravel collected in the vicinity of the site, so-called soil generated from the site.

  When the total amount of sand and gravel to be blended in the waterstop material 9 is 100 parts by mass of bentonite, the total amount of sand and gravel is preferably 100 parts by mass or less, more preferably 20 to 50 parts by mass. preferable. When the total amount of sand and gravel exceeds 100 parts by mass, the content of bentonite is insufficient, and the water stop action due to swelling tends to be insufficient.

  Furthermore, for the purpose of improving the mechanical strength and chemical durability of the water-stopping layer 5, a fiber material (diameter 1 to 100 μm, length 1 to 100 mm) may be blended with the water-stopping material 9.

  The water content ratio of the water stop material 9 is preferably 15 to 30%, and more preferably 20 to 25%, from the viewpoint of adhesion of the water stop material 9 to the construction surface 10a. When the water-stopping layer 5 is formed by a wet spraying method, the water-stopping material 9 may be prepared in advance so that the water content ratio falls within the above range. On the other hand, in the case of forming by a dry spraying method, the air-kneaded material and the water injection amount may be adjusted so that the water content of the water-stopping material 9 constituting the water-stopping layer 5 is within the above range.

  As water to be contained in the water stop material 9, tap water, ground water, or the like can be used. Further, from the viewpoint of improving the adhesion of the water stop material 9, it is preferable to use an aqueous solution containing a cation and carbonate ion or bicarbonate ion. A suitable aqueous solution is an aqueous carbonate solution or an aqueous bicarbonate solution containing the same cation as the interlayer cation of bentonite.

  Suitable examples of the carbonate aqueous solution include a sodium carbonate aqueous solution, a potassium carbonate aqueous solution, and an iron carbonate aqueous solution. Suitable aqueous bicarbonate solutions include sodium bicarbonate aqueous solution, potassium bicarbonate aqueous solution, iron bicarbonate aqueous solution and bicarbonate aqueous solution. Further, an aqueous solution containing alcohols such as ethanol may be used. These aqueous solutions may be used individually by 1 type, and may mix and use 2 or more types.

  Next, referring to FIGS. 4 to 7, the water stop method using the panel 7 having the cell structure described above will be described. This water stop construction method includes a panel installation step, a water stop layer formation step, and a structure installation step. Here, a case where the water blocking layer 5 is formed by a wet spraying method will be described as an example.

  FIG. 4 is a perspective view showing a state of the construction surface 10a of the water blocking wall 10 before the panel 7 is installed. As shown in the figure, the water blocking walls 10 are constructed on both sides of the tunnel frame 1 installed underground and outside the tunnel frame 1. The water blocking wall 10 can be constructed as follows by, for example, an SMW (Soil Mixing Wall) method.

  First, a vertical hole is excavated using a heavy excavator at a position away from a planned installation position of the mortar wall 3 of the underground road structure 20. Then, the mud mortar liquid obtained by mixing the soil generated in the field and the mortar liquid is injected into the vertical hole, and the H steel 10b having an H-shaped cross section is inserted from above as a core material. Here, the flat plate surface of each H steel 10b is arranged in a line so as to face the underground road structure 20. Two parallel water blocking walls 10 are constructed by a structure composed of H steel 10b and a cured product 10c of mud mortar liquid.

  After the mud mortar liquid is sufficiently cured, the soil between the two water blocking walls 10 is removed, and the inner surface side of the water blocking wall 10 is exposed. Further, the cured product 10c of the mud mortar liquid is partially scraped to expose the flat plate surface of the H steel 10b. As a result, a continuous and flat construction surface 10a is formed.

  FIG. 5 is a perspective view showing a state in which the panel 7 having the cell structure is installed on the construction surface 10 a of the water blocking wall 10. A hook or the like (not shown) for fixing the cell-structured panel 7 is provided on the flat plate surface of the H steel 10b exposed on the construction surface 10a by welding. The panel 7 is installed on the construction surface 10a by fixing the panel 7 to a hook or the like (panel installation process).

  When installing the panel 7, it is preferable to provide a slight gap between the panel 7 and the construction surface 10a. Such a gap serves as a flow path for releasing the compressed air used for spraying the water-stopping material 9, whereby the operation of spraying the water-stopping material 9 can be performed more efficiently.

  FIG. 6 is a perspective view showing a state in which an operation of filling the water-stopping material 9 into the cell 8 by wet spraying is performed. As shown in the figure, the water-stopping material 9 sprayed from the nozzle 15 is sprayed toward the construction surface 10a, and the water-stopping material 9 is placed in the gaps between the panel 7 and the construction surface 10a and in each cell 8 of the panel 7. (Water-stop layer forming step). The water-stopping material 9 is sprayed until the thickness of the water-stopping material 9 is equal to or more than that of the panel 7. Thereby, the water stop layer 5 which encloses the panel 7 is formed.

  FIG. 7 is a perspective view illustrating a state where the spraying operation of the water blocking material 9 is completed and the water blocking layer 5 is formed on the construction surface 10a.

  After forming such a water-stopping layer 5 on the construction surface 10 a of the two water-stopping layers 10, a tunnel frame 1 (so-called box culvert) made of precast concrete is disposed between the two water-stopping layers 5.

  Then, a mortar wall 3 is constructed by placing mortar between the tunnel frame 1 and the water blocking layer 5 and the tunnel frame 1 is fixed (structure installation step). After the construction of the mortar wall 3, soil is put into the space 11 above the tunnel frame 1, and the construction work of the underground road structure 20 is completed.

  In this embodiment, the water discharge from the construction surface 10a is sufficiently suppressed by forming the water blocking layer 5. Therefore, it is possible to prevent water from the construction surface 10a from entering the underground road structure 20 side, and thus to prevent water from entering the tunnel frame 1. This is due to the following water-stopping action of the water-stopping layer 5.

  For example, as shown in FIG. 8, when a crack (crack) C occurs in the water blocking wall 10 in the future, and the ground water enters the water blocking layer 5 from the crack C, the water blocking material 9 absorbs the ground water. Swells. If it does so, the water stop material 9 will penetrate | invade into the crack C, and the gap which is flowing out will be filled up. In this way, long-term water stoppage can be ensured in a maintenance-free state.

  Further, the water blocking layer 5 is composed of a panel 7 having a cell structure and a water blocking material 9. And this water stop material 9 is accommodated between the water stop wall 10 and the mortar wall 3 in the state divided by the partition 8b of the panel 7. FIG. For this reason, the swelling of the water stop material 9 that has absorbed groundwater is prevented by the partition wall 8b of the panel 7 in the direction of arrow B shown in FIG. 8 (the direction perpendicular to the thickness direction of the water stop layer). Therefore, the water stop material 9 swells mainly in the direction of arrow A shown in FIG. 8 (the thickness direction of the water stop layer). When the water-stopping material 9 swells in the direction of arrow A, a pressure in the direction of pressing the construction surface 10a (pressure in the direction of arrow A) is generated, and water discharge from the construction surface 10a is suppressed by this pressure.

  As a comparative example, the water stop layer 55 shown in FIG. 9 does not include the cell-structured panel 7 and is composed of only the water stop material 9. In this case, since there is no panel 7 for preventing the water-stopping material 9 from swelling in the direction of the arrow B shown in FIG. 9 of the water-stopping layer 55, the pressure in the direction of pressing the construction surface 10a even if the water-stopping material 9 swells. (Pressure in the direction of arrow A) may be insufficient.

  Moreover, in this embodiment, the panel 7 is installed on the surface of the construction surface 10a, and the water stop material 9 is sprayed toward the construction surface 10a on which the panel 7 is installed. By providing the panel 7 having the cell structure, it is possible to sufficiently prevent the sprayed water-stopping material 9 from dropping or peeling off. Therefore, even if it is the construction surface 10a erected in the vertical direction, the water blocking material 9 can be reliably attached, and the water blocking layer 5 can be formed efficiently.

(Second Embodiment)
Another preferred embodiment of the water stop method according to the present invention will be described by taking as an example the case of constructing a waste housing structure.

  FIG. 10 is a cross-sectional view showing a waste containing structure (structure) constructed by adopting the water stop method according to the present invention. This embodiment is different from the first embodiment in the following points. That is, (I) the water surface is formed directly on the soil surface formed by excavation without constructing the water barrier, and (II) the soil surface that forms the water surface is a substantially horizontal and inclined surface. There is a point (III) in which a water stop panel is used in forming a water stop layer on a substantially horizontal plane.

  As shown in FIG. 10, in the water stop construction method according to the present embodiment, the waste containing structure 40 is constructed in the opening 50 formed by excavation. The opening 50 includes a bottom surface 50a that is sufficiently flat and four inclined surfaces (so-called slopes) 50b that are provided so as to surround the bottom surface 50a. A water blocking layer 45a is formed on the surface of the bottom surface 50a of the opening 50, and a water blocking layer 45b is also formed on the surface of the inclined surface 50b.

  The waste storage structure 40 includes a waste storage frame 41 made of concrete, and a concrete filling portion 43 formed so as to fill a space between the side surface of the waste storage frame 41 and the water blocking layer 45b. It consists of.

  One surface of the water blocking layer 45a is in contact with the bottom surface 41a of the waste container frame 41, and the other surface is in contact with the bottom surface (construction surface) 50a of the opening 50. On the other hand, one surface of the water blocking layer 45b is in contact with the contact surface 43a of the concrete filling portion 43, and the other surface is in contact with the inclined surface (construction surface) 50b of the opening 50.

  In this embodiment, when forming the water stop layer 45a on the bottom face 50a, the water stop panel according to the present invention is used. FIG. 11 is a cross-sectional view showing a preferred embodiment of a water stop panel according to the present invention. The water stop panel 60 shown in FIG. 11 is obtained by filling each cell 8 of the cell structure panel 7 with the water stop material 9.

  The water stop panel 60 is formed by pressing the water stop material 9 filled in each cell 8 with a rolling roller or the like, and is produced in a factory. By using the water stop panel 60, it is not necessary to perform operations such as spraying at the site where the water stop layer is formed. That is, the water stop layer can be formed simply by disposing the water stop panel 60 at a desired position. However, since the water stop panel 60 is flat, it is preferable that the surface on the side where the water stop panel 60 is disposed is sufficiently flat.

  In constructing the waste container structure 40, first, an opening 50 for installing the waste container structure 40 is excavated by a heavy excavator.

  Since the water blocking panel 60 is used, the ground is leveled so that the bottom surface 50a of the opening 50 is sufficiently flat. And the some water stop panel 60 is laid so that the bottom face 50a may be covered, and the water stop layer 45a is formed (water stop panel installation process).

  The water stop layer 45 b is formed using the panel 7 and the water stop material 9. First, the panel 7 is disposed on the inclined surface 50b, and the panel 7 is installed by pressing the panel 7 against the inclined surface 50b (panel installation step). The water blocking layer 45b is formed by a spraying operation as in the first embodiment (water blocking layer forming step).

  Then, the waste storage frame 41 is installed on the water blocking layer 45a. Furthermore, the concrete filling part 43 is constructed by placing concrete in the space between the waste storage frame 41 and the water blocking layer 45b, and the waste storage frame 41 is fixed (structure installation step).

  The concrete in the concrete filling portion 43 is cured, and the construction work of the waste containing structure 40 is finished.

  In this embodiment, the water discharge from the bottom surface 50a and the inclined surface 50b of the opening 50 is sufficiently suppressed by forming the water blocking layers 45a and 45b. Accordingly, it is possible to prevent water from the bottom surface 50a or the inclined surface 50b from entering the waste housing structure 40, and thus to prevent water from entering the waste housing frame 41. Further, due to the swelling property of the water-stopping material, long-term water-stopping can be ensured in a maintenance-free state. Moreover, even when water leaks from the waste housing structure 40 side, it is possible to sufficiently prevent water from entering the soil.

  Moreover, in this embodiment, the water stop panel 60 is used for formation of the water stop layer 45a. For this reason, the water stop layer 45a can be formed very easily only by disposing the water stop panel 60 on the bottom surface 50a. On the other hand, the water-stopping layer 45b is provided with the cell-structured panel 7 on the surface of the inclined surface 50b and sprayed with the water-stopping material 9 on the inclined surface 50b on which the panel 7 is installed. Since the panel 7 is installed, the sprayed water-stopping material 9 can be sufficiently prevented from dropping or peeling off. Therefore, even if the construction surface is an inclined surface, the water-stopping material 9 can be reliably attached and the water-stopping layer 45b can be formed efficiently.

  In addition, you may form the water stop layer 45b using the water stop panel 60 similarly to the water stop layer 45a. In this case, it is possible to form the water stop layer 45b very easily only by disposing the water stop panel 60 on the inclined surface 50b.

  Further, in forming the water stop layer 45a, the water stop panel 60 may not be used but the panel 7 and the water stop material 9 may be used. In this case, the water-stopping layer 45a can be formed by spraying the water-stopping material 9 after installing the panel 7 on the bottom surface 50a. Alternatively, after the panel 7 is installed, a powdery water-stopping material is spread on the bottom surface 50a so as to have a layer thickness equal to or greater than the thickness of the panel 7, and then pressed and hardened with a roller or the like. The layer 45a may be formed.

  As mentioned above, although preferred embodiment of the water stop construction method concerning this invention was described, this invention is not limited to the said 1st and 2nd embodiment. For example, according to the present invention, even when a waterproof layer is formed between the wall surface and the wall surface of a structure such as a building or a retaining wall constructed on the ground as well as an underground structure as in the above embodiment. A water stop method can be used.

  Further, in the first embodiment, the water blocking layer 5 is formed by the spraying operation, but the water blocking layer 5 may be formed using the water blocking panel 60. Furthermore, filling of the water-stopping material 9 into the cells 8 of the panel 7 may be performed by a combination of spraying and rolling. For example, the water stop material may be sprayed after being sprayed, or the water stop material may be sprayed after being rolled. In the above embodiment, wet spraying is taken as an example, but the water-stopping material may be filled by dry spraying. Note that both wet and dry spraying are methods of attaching a water-stopping material on a construction surface using jetting of compressed air or the like.

  Moreover, the object of the water stop construction method according to the present invention is not limited to a structure made of concrete or mortar, and can also be applied to earth structures such as embankments and cuts.

  As the panel having the cell structure, the partition 8b provided with the perforations 8c is illustrated, but in the present invention, a panel without perforations may be used. Further, the cell structure of the cell structure panel is not limited to the lattice shape, and as shown in FIG. 12, an oblique mesh structure (see FIG. 12 (a)), a honeycomb structure (see FIG. 12 (b)), and a circle-contact structure ( (See FIG. 12C).

It is sectional drawing which shows the underground road structure built by employ | adopting the water stop construction method concerning this invention. It is a fragmentary sectional view which expands and shows a part of water stop layer of FIG. 1, and its vicinity. It is a perspective view which shows one suitable form of the panel of a cell structure. It is a perspective view which shows the state of the construction surface before the panel of a cell structure is installed. It is a perspective view which shows the state in which the panel of the cell structure was installed on the construction surface. It is a perspective view which shows a mode that the water stop material is filled by spraying. It is a perspective view which shows the state in which the water stop layer was formed on the construction surface. It is a partial schematic cross section for demonstrating the case where water penetrate | invades in the still water layer which encloses the panel of a cell structure. It is a partial schematic cross section for demonstrating the case where water penetrate | invades in the water stop layer which does not include the panel of a cell structure. It is a schematic cross section which shows the waste accommodating structure constructed | assembled using the water stop construction method based on this invention. It is sectional drawing which shows suitable embodiment of the water stop panel which concerns on this invention. (A)-(c) is a schematic cross section which shows the other suitable form of the panel of a cell structure, respectively.

Explanation of symbols

5, 45a, 45b ... water stop layer, 7 ... cell structure panel, 8 ... cell, 8a ... hole, 8b ... partition wall, 9 ... water stop material, 10 ... water stop wall, 10a ... construction surface, 50a ... bottom surface (Construction surface), 50b ... inclined surface (construction surface), 3a, 43a ... abutment surface, 20 ... underground road structure (structure), 40 ... waste storage structure (structure), 60 ... water stop panel .

Claims (5)

On a construction surface that requires a water stop treatment, a panel having a cell structure composed of a plurality of holes penetrating in the thickness direction, partition walls separating the adjacent hole parts, and perforations provided in the partition walls. Panel installation process to be installed in,
Filling the cell with a water-stopping material containing bentonite, and forming a water-stopping layer with the panel and the water-stopping material,
A structure installation step of bringing the structure into contact with the water blocking layer;
Equipped with a,
The construction surface is an inclined surface or a surface extending in the vertical direction, and filling the cell with the water-stopping material is performed by spraying . The water stop construction method according to claim 1 , wherein the water stop material further contains at least one of sand and gravel. When the composition of the water-stopping material is 100 parts by weight of the bentonite, the total amount of the sand and gravel is 100 parts by weight or less, and the water content ratio of the water-stopping material is within a range of 15 to 30%. The water stop method according to claim 2 , wherein the water stop method is provided. A water stop panel that is disposed between a construction surface requiring a water stop treatment and a structure, and used to prevent water from the construction surface from entering the structure side,
A panel having a cell structure comprising a plurality of holes penetrating in the thickness direction, partition walls separating the adjacent hole parts, and perforations provided in the partition walls;
A water-stopping material containing bentonite and filled in the hole of the panel;
A water-stop panel comprising: A panel having a cell structure composed of a plurality of holes penetrating in the thickness direction, partition walls separating the adjacent hole parts, and perforations provided in the partition walls, and containing bentonite, the panel A water-stop material filled in the hole, and a water-stop panel installation step of installing a water-stop panel provided on a construction surface that requires a water-stop treatment,
A structure installation step of bringing the structure into contact with the water stop panel;
A water stop construction method characterized by comprising:

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