JP2004261721A - Water sealing civil engineering work for construction in covered type waste final disposal site and construction therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water sealing method of a construction of a covered type waste final disposal site, which is covered by a covering means extended above a landfill site, for economically and reliably preventing leachate leakage in the peripheral part of the boundary of a water sealing sheet of the construction penetrating the water sealing sheet and the construction and to provide the construction with such a struture. <P>SOLUTION: When the vertical surface of a concrete construction (3) for supporting a covering means extended above a landfill site is water-sealed with a water sealing sheet (4), the water sealing civil engineering work is carried out by previously arranging a plurality of sheets (5) having anchors for fixing the water sealing sheet (4) in the inner circumferential face of an assembled frame for a concrete construction (3) in such a manner that their overlapping margins are overlaid on one another and loading ready mixed concrete into the assembled frame. After the concrete is hardened, the frame is removed and a water sealing sheet (6) laid on the bottom face part of the landfill site and the normal face parts (1b) is thermally bonded to the sheets (5) having anchors and joined side by side and attached to the construction (3). <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water-impervious construction method and a water-impervious structure for a covered-type waste final disposal site that covers an upper part with a roof or the like.
[0002]
[Prior art]
In recent years, with the increase of various types of waste such as industrial waste, the ground is dug down or a concrete wall is provided around it, and the waste is dumped therein. In such a waste disposal site, a covered-type waste disposal site provided with a roof for preventing inflow of rainwater and scattering by wind is known. (Patent Document 1).
[0003]
In order to prevent the sewage generated from the dumped waste from seeping out and diffusing to the outside soil, a water shielding sheet such as a synthetic resin is laid in the disposal site to prevent the sewage from spreading.
[0004]
However, when a roof is provided, a pillar as a concrete structure that supports the roof is inevitably required, and in order to stand the pillar, a laid water-impervious sheet must be penetrated. A water shielding means for a portion penetrating the water sheet is required.
[0005]
In some cases, concrete pits may be installed at the final disposal site for waste. Even in such a case, there is still a problem of water shielding between the water shielding sheet and the concrete pit as the concrete structure.
[0006]
Further, when it is necessary to provide a drain pipe to guide the sewage to the sewage treatment plant, a similar problem occurs in a portion where the drain pipe penetrates the water shielding sheet.
[0007]
A technique is known in which a measurement electrode used for detecting damage to a water-impervious sheet at a waste disposal site is installed with high accuracy so as to prevent displacement after installation (for example, Patent Document 2). reference).
Also known is a technique for ensuring a water shielding effect, preventing peeling between a water shielding sheet and a nonwoven fabric during construction, and preventing product destruction of the nonwoven fabric and the like.
[0008]
[Patent Publication 1]
Utility Model Registration No. 3040303 (summary, Fig. 1)
[Patent Document 2]
JP 2002-102816 (page 3-6, FIG. 1)
[0009]
However, neither of the above-mentioned two known techniques has yet established a technique for preventing leakage from a penetration position of a pillar, a concrete pit, a pipe, or the like, which is a concrete structure penetrating the water shielding sheet.
[0010]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide a boundary between a structure and a sheet penetrating a water shielding sheet in a covered waste final disposal site having a water shielding sheet and covered by a covering means extending above a landfill. It is an object of the present invention to provide a water-blocking construction method and a water-blocking structure for a covered-type waste final disposal site that can reliably prevent leakage in the vicinity at a low price.
[0011]
[Means for Solving the Problems]
According to the present invention, in order to support the covering means (2) in the water shielding method of the covered waste final disposal site (F) covered by the covering means (2) extending above the landfill (1). A plurality of anchored sheets (5) for fixing the water shielding sheet (4) to the vertical surface (3a) of the concrete structure (3) of the concrete structure (3) in advance on the inner peripheral surface of the concrete structure mold (30) The anchor-attached sheet attaching step (FIG. 5) that is arranged and attached so as to form the overlapping margin portion (5c), and the plurality of molds (30) to which the plurality of anchor-attached sheets (5) are attached. An assembling process (FIG. 6), a concrete placing process (FIG. 7) for placing ready-mixed concrete (Ca) on the assembled formwork (30), and a mold after the placed concrete is cured (C) Form removal process for removing the frame (30) ( 8) and a joining step (FIG. 9) in which the adjacent anchored sheets (5) are joined together by the overlap margin (5c) after removing the formwork (30), and the concrete structure (3 The waterproof sheet (6) to be laid is joined to the anchored sheet (5) attached to each other and joined together by thermal welding (Claim 1).
[0012]
Attach the anchored sheet (5) one or more times in the order of the area without the anchored sheet (K) and the anchored sheet (5) above the anchored sheet (5) of the mold (30). And a step of covering the region (E) without the anchored sheet with the water shielding sheet (6) while being superimposed on the anchored sheet (5) by the overlap margin (6c) (claim 2).
[0013]
According to the present invention, the covering means (2) is supported in the water shielding structure of the covered waste final disposal site (F) covered with the covering means (2) extending above the landfill (1). A plurality of anchored sheets (5) for fixing the water shielding sheets (4, 6) in order to shield the vertical surface (3a) of the concrete structure (3) for use with the water shielding sheets (4); The concrete structure (3) attached so that adjacent boundary portions of the anchored sheet (5) are overlapped by the overlap allowance (5c) to cover the vertical surface, the landfill bottom surface portion (1a) and the method A water shielding sheet (4) laid on the surface (1b), and the water shielding sheet (4) laid on the anchored sheet (5) attached to the concrete structure (3) is thermally welded. Are configured to be joined together (claims) ).
In addition, the water-impervious sheet (4) to be laid on the landfill bottom surface (1a) and the slope (1b) is a non-permeable sheet material (4A) made of non-permeable material, for example, in order from the surface of the landfill (1). It is preferable to laminate and use a nonwoven fabric (4B), a conductive nonwoven fabric (4C) (unnecessary when no electric water leakage detector is provided), and a synthetic resin sheet material (4A).
[0014]
One or more anchored sheets (5) are added in the order of the region without the anchored sheet (E) and the anchored sheet (5) above the anchored sheet (5) of the mold (30). The region (K) having no attached sheet is covered with a water shielding sheet (6) superimposed on the anchored sheet (5).
[0015]
According to the present invention of the construction method and structure as described above, the vertical surface (3a) of the concrete structure (3) is covered with the anchored sheet (5), and the landfill (up to the anchored sheet (5)) 1) The impermeable sheet (4) laid on 1) is rolled up, and the end of the impermeable sheet (4) is joined to the anchored sheet (5) by thermal welding, so the concrete structure of the landfill surface (1c) The penetrating position of the object (3) is completely covered with the anchored sheet (5) and the water shielding sheet (4), and the upper part is also covered with the structure. It does not penetrate into the area (1d) filled with the object.
[0016]
According to the present invention, the leachate drainage pipe (90) and the seepage water drainage pipe (95) projecting to the vertical surface (1f) at the end of the landfill Protrusions (90a, 95a
) Covering the vertical surface (1f) of the end of the landfill (1) with a water-impervious sheet (40) having a hole (40a) that passes through the leachate collection drainage pipe (90) and permeated water. A predetermined area of the projecting portion (90a, 95a) of the drainage pipe (95) is covered and wrapped around the hole portion (40a) of the water shielding sheet, so that the hole portion of the vertical surface (1f) is another water shielding property. Covering with a sheet (60).
[0017]
The leachate collection drainage pipe (90) projecting to the vertical surface (1f) at the end of the landfill and the hole (40a) passing through the projections (90a, 95a) of the seepage water collection drainage pipe (95) A water-impervious sheet (40) covering the vertical surface (1f) at the end of the landfill (1), and the protrusions (90a, 95a) of the leachate collection / drainage pipe (90) and the permeate collection / drainage pipe (95) ) And a water shielding sheet (60) covering the hole (40a) of the water shielding sheet (40), and the hole (40a) by the water shielding sheet (60). The hole (40a) of the water shielding sheet on the vertical surface (1f) is covered while being wrapped with the periphery.
[0018]
According to the water-impervious construction method and the structure of the structure of the coated waste final disposal site according to the present invention, the penetration portion of the structure (3) in the water-impervious sheet (4) covering the surface of the landfill (1) is The water-impervious sheet (4) is rolled up to a predetermined height of the vertical surface (3a) of the structure (3), and the anchor-attached sheet (5) and the water-impervious sheet (4) incorporated in the structure (3) Is sealed in a liquid-tight manner by thermal welding, so that the permeated water in the joints does not enter the landfill (1) by water pressure.
Since no metallic material is used, the measurement / analysis environment can be improved and the accuracy can be ensured at the waste final disposal site using the electric water leakage detector.
Furthermore, by applying to concrete underground piles of buildings, underground piles can be prevented from corroding due to the effects of geology and groundwater quality.
The protrusions (90a, 95a) of the leachate collection drain pipe (90) and the permeate drain pipe (95) are liquid-tightly joined by the water shielding sheet (40) and the sealing water shielding sheet (65). From the landfill (1), the sewage in the landfill (1) does not leak outside from any place except the leachate collection drainage pipe (90) and the seepage water collection drainage pipe (95).
It can be applied not only to pillars and shafts at the final disposal site, but also to any concrete structure that penetrates the water shielding sheet, such as pits, dredging, drainage pipes, and concrete.
Moreover, the present invention can be applied not only to the final waste disposal site but also to facilities that provide water shielding with a water shielding sheet such as a pond and a dam.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0020]
First, a first embodiment will be described with reference to FIGS.
In FIG. 1, a roof member 2 that is a covering means for covering the upper part of the landfill 1 in the covered waste final disposal site F is supported by a plurality of concrete columns 3. In the example shown in the figure, the landfill 1 created by excavation is composed of a landfill area 1d in which waste to be disposed of is disposed in a depression 1c having a mortar-like cross section formed by a bottom surface portion 1a and a slope portion 1b. ing.
[0021]
The slope 1b and bottom 1a of the landfill 1 and the surface 1e of the landfill area 1d are entirely covered with a water-impervious sheet 4 made of, for example, synthetic resin.
[0022]
2 to 4 show the penetration position and the pillar 3 of the concrete column 3 erected so as to penetrate the sloped surface portion 1b and bottom surface portion 1a of the landfill 1 and the water shielding sheet 4 coated on the surface 1e of the landfill region 1d. It is a figure for demonstrating own water-impervious structure, and does not show the position of the concrete pillar 3 of the actual disposal site F. 2 and 3 show the periphery of the column 3 standing on the slope portion 1b, and FIG. 4 shows the periphery of the column 3 standing on the bottom surface portion 1a. In FIG. 2, reference numeral 3 c indicates the foundation of the concrete pillar 3.
[0023]
In FIG. 2, the slope portion 1 b is covered with a water shielding sheet 4 in advance, and a concrete column 3 is erected on the slope 1 b so as to penetrate the water shielding sheet 4.
[0024]
The cross-sectional structure of the vertical surface 3a of the concrete column 3 will be described with reference to FIGS. 5 shows part A in FIG. 2, FIG. 6 shows part B in FIG. 2, FIG. 7 shows part C in FIG. 2, and FIG. 8 shows part D in FIG. That is, the anchored sheet 50 having a water shielding function for fixing the water shielding sheet 4 in a liquid-tight manner is embedded in the anchor portion 50b in the concrete, and the sheet portion 50a is attached so as to cover the column surface 3a. .
[0025]
A special water-impervious sheet 6 is wound around a region K having a predetermined distance L between the two anchored sheets, and the end of the sheet 4 is heated to the two anchored sheets 50. It is fixed by welding T3 and T4.
[0026]
With reference to FIG. 7 (C section of FIG. 2), the water shielding structure of the said part is demonstrated in detail. In the illustrated example, the water-impervious sheet 4 is, in order from the landfill surface (slope 1b) upward, a non-permeable water-permeable sheet material 4A made of synthetic resin, for example, a nonwoven fabric 4B, a conductive nonwoven fabric 4C, and a water-impervious sheet material. 4A is laminated.
Here, the conductive non-woven fabric 4C uses a water leakage detector (not shown), for example, an electric current generated when water leaks due to the entire sheet 4 being torn by an object included in the disposal soil or an object falling on the upper surface of the sheet 4 from above. Layered to convey changes in value or potential difference to the leak detector.
The nonwoven fabric 4B is laminated in order to receive the impact even if an external force is applied from the upper surface of the water-impervious sheet 4 and to prevent the lowermost sheet material 4A from being damaged.
[0027]
In the laminated water-impervious sheet 4, the lowermost water-impervious sheet 4 </ b> A is raised to a predetermined height h along the vertical surface 3 a of the concrete pillar 3 (the vertical surface of the anchored sheet 5).
The subsequent water-impervious construction process will be described after the description of the process for attaching the anchored sheet 5 to the concrete pillar 3.
[0028]
The process of attaching the anchored sheet 5 to the concrete pillar 3 will be described with reference to FIGS.
In FIG. 10, a plurality of anchored sheets 5 for fixing the water-impervious sheet 4 are not clearly shown in advance on the inner peripheral surface of the concrete structure mold 30 in advance, but overlapping portions are formed. Place and install so that. In addition, when attaching to the formwork 30, the anchor part 5b is arrange | positioned so that it may face the center of the concrete pillar formed.
[0029]
In the next FIG. 11, a plurality (four in the illustrated example) of molds 30 to which the plurality of anchored sheets 5 are attached are assembled. Then, the ready-mixed concrete Ca is placed in the assembled formwork 30 (FIG. 12). After the cast concrete has hardened (C), the mold 30 is removed (FIG. 13), and after the mold (30) is removed, the adjacent anchored sheets (5) are separated by the overlap margin (5c). For example, it is bonded by heat welding (FIG. 14).
[0030]
Referring to FIG. 7 again, the lowermost water shielding sheet 4A of the water shielding sheet 4 is raised to a predetermined height h along the vertical surface 3a (the anchored sheet 5) of the concrete pillar 3, The end portion of the lowermost water-impervious sheet 4A is bonded to the anchored sheet 5 covered with the concrete pillar 3 by thermal welding T1.
[0031]
Further, the end of the uppermost water-impervious sheet 4A is rolled up above the above-mentioned heat welding while sandwiching the nonwoven fabric 4B and the conductive nonwoven fabric 4C, and the sheet of the uppermost water-impervious sheet 4A is anchored at that position. The sheet 5 is bonded by thermal welding T2.
[0032]
As such, in order to liquid-tightly join the sheet of the uppermost water-impervious sheet 4A to the anchored sheet 5 so as to wrap the sheets 4C and 4B of the layers below, Water can be prevented from entering into the landfill 1 immediately below through the gap formed by the penetration of the concrete pillar 3 of the water-impervious sheet 4.
[0033]
FIG. 7 shows the water shielding structure on the upper side of the slope, whereas FIG. 8 shows the water shielding structure on the lower side of the same concrete column, and the basic structure is the same.
Here, reference numeral 4A denotes a synthetic resin sheet, 4B denotes a nonwoven fabric, 4C denotes a conductive nonwoven fabric, and the water shielding sheet 4 includes four layers.
[0034]
FIG. 6 is a view showing in detail the portion B of FIG. 2 and shows the vicinity of the upper end of the anchored sheet 5 covering the concrete pillar 3. Here, an example is shown in which the concrete column 3 exposed above the anchored sheet 5 is covered with another water shielding sheet 6. Similarly to the example of C section (FIG. 7), the water shielding sheet 6 is joined to the anchored sheet 5 by thermal welding T3.
[0035]
FIG. 5 is a detailed view of part A of FIG. 2, in which a concrete column 3 above another water-impervious sheet 6 is covered with an anchored sheet 50, and the upper end of the water-impervious sheet 6 is anchored. It is shown that the sheet 50 is joined by thermal welding T4.
[0036]
The example of FIG. 3 is constructed by adding a water-impervious sheet 60 and an anchored sheet 55 above the concrete pillar 3 to the example of FIG. 2, and the basic structure is the same as the example of FIG. is there.
[0037]
FIG. 4 shows the case where the concrete pillar 3 standing on the slope is shown in FIGS. 2 and 3, whereas the concrete pillar standing on the bottom surface 1 a of the landfill is shown. This shows the case of water shielding treatment.
[0038]
As shown in detail in FIG. 9, the water shielding sheet 4 made of a nonwoven fabric and a synthetic resin sheet having the same configuration as in FIGS. 7 and 8 is used for the E part and the F part in FIG. 4. And the anchored sheet 5 are also joined in the same manner.
[0039]
According to the first embodiment of the method and structure as described above, the penetration portion of the concrete pillar 3 in the water shielding sheet 4 covering the surface of the landfill 1 is a predetermined part of the vertical surface 3 a of the concrete pillar 3. The anchored sheet 5 and the water shielding sheet 4 which are rolled up to the height of the concrete column 3 and are sealed in a liquid-tight manner by heat welding, so that the water above the landfill 1 enters the landfill 1 by water pressure. Intrusion is prevented.
Since the metallic material is not used for the water-impervious treatment, it is possible to improve the measurement / analysis environment and ensure the accuracy at the final disposal site using the electric water leakage detector.
Furthermore, by applying to concrete underground piles of buildings, underground piles can be prevented from corroding due to the effects of geology and groundwater quality.
[0040]
Next, a second embodiment will be described with reference to FIGS. 15 and 16.
In the first embodiment of FIGS. 1 to 14, the concrete pillar 3 penetrates the water shielding sheet 4 covering the landfill surface 1e when the concrete pillar 3 is erected on the slope 1b and the bottom face 1a of the landfill 1. 15 and FIG. 16, in the second embodiment of FIG. 15 and FIG. 16, the concrete pit 8 installed above the slope part 1b covers the landfill 1 The water shielding method with respect to penetrating the water shielding sheet 4 and its structure are shown.
[0041]
Although the shape and size of the anchored sheet 57 attached so as to cover the surface of the vertical surface of the raw water pit 8 are different from the anchored sheet 5 of the first embodiment, to the water shielding sheet 4 and the anchored sheet 57. The method and structure for joining the water shielding sheet 4 are the same as the example shown in FIG.
[0042]
In the third embodiment of FIGS. 17 to 19, the leachate collecting pipe 90 protruding from the end surface 30e of the protective concrete structure C at the end of the landfill 1 and the protrusions 90a and 95a in the vicinity of the protruding portions 90a of the seepage water drain pipe 95 are used. The water method and its structure are shown. Below, the leachate collection / drainage pipe 90 projecting to the end face 30e of the protective concrete structure C at the end of the landfill and the water shielding method near the projections 90a, 95a of the permeate collection / drainage pipe 95 and the structure thereof will be described. .
[0043]
17 and 18, the protective concrete structure C at the end of the landfill 1 is provided with a water collecting groove M and a drainage groove N adjacent to each other. The leachate collection / drainage pipe 90 and the seepage collection / drainage pipe 95 embedded in the landfill 1 so as to flow into the catchment groove M and the drainage groove N are from the end face 30a of the protective concrete structure C at the end of the landfill 1. It protrudes.
[0044]
Referring to FIG. 19 which is an XX cross-sectional view of FIG. 18 as well, the end surface 30a of the protective concrete structure C at the end of the landfill 1 has a leachate collection / drainage pipe 90 and an infiltration water collection / drainage pipe 95. The protrusions 90a and 95a are covered with a water shielding sheet 40 formed with holes 40a (corresponding to 90a, holes corresponding to 95a are not shown). In FIG. 19, only the leachate collection / drainage pipe 90 is illustrated. Therefore, only the periphery of the leachate collection / drainage pipe 90 will be described below, but the same applies to the seepage water collection / drainage pipe 95.
[0045]
The water-impervious sheet 40 is configured by laminating an impermeable water-impervious sheet material 40A, a nonwoven fabric 40B, a conductive nonwoven fabric 40C, and a water-impervious sheet material 40A in order from the end face 30a to the outside (left side in the drawing). Has been. Although not clearly shown in the figure, the end face 30a of the protective concrete structure is provided in advance with a sheet similar to the anchored sheet used in the first and second embodiments. Then, the inner and outer water-impervious sheets 40A are joined to the anchored sheets by heat welding T5 and T6.
[0046]
On the other hand, the projecting portion 90a of the leachate collecting / draining pipe 90 is covered (65b) by a predetermined length of the projecting portion 90a and has a circular flange 65a that is superimposed on the water shielding sheet 40. The sheet 65 is penetrated. And after this circular collar part 65a is piled up on the said water shielding sheet 40, it joins with the water shielding sheet 40 by heat welding T7.
[0047]
According to the third embodiment having such a construction method and structure, the projecting portions 90a, 95a of the leachate collection drain pipes 90, 95 are joined in a liquid-tight manner by the water shielding sheet 40 and the sealing water shielding sheet 65. From the landfill 1, the sewage in the landfill 1 does not leak outside from any place except the leachate collection pipes 90 and 95.
It can be applied not only to pillars and other vertical shafts at the final disposal site, but also to any concrete structure that penetrates the water shielding sheet such as pits, dredging, drainage pipe protection concrete, and inspection gallery.
Moreover, the present invention can be applied not only to the final waste disposal site but also to facilities that provide water shielding with a water shielding sheet such as a pond and a dam.
[0048]
The illustrated embodiment is merely an example, and is not a description to limit the technical scope of the present invention. For example, the horizontal cross section of the concrete column 3 and its mold 30 of the first embodiment is rectangular in the illustrated example. There may be a circular cross section.
Moreover, although the collar part of the sealing water shielding sheet 65 of 3rd Embodiment and the hole part 40a which avoids the protrusion part of the water shielding sheet 40 are circular, it is good also as a rectangle.
Furthermore, the material of the water shielding sheet is not limited to vinyl chloride, and all materials generally used as a water shielding material for waste final disposal sites such as synthetic rubber, polyethylene, and urethane are applicable.
Further, the anchored sheet can be divided and cut into the shape and size of the formwork used according to the structure and shape of the structure, as in the conventional concrete structure construction method.
[0049]
【The invention's effect】
The effects of the present invention are listed below.
(1) The penetration part of the structure in the water-impervious sheet covering the landfill surface is rolled up to a predetermined height of the vertical surface of the structure and the anchored sheet incorporated in the structure Since the water sheet is sealed in a liquid-tight manner by heat welding, the water above the landfill is prevented from entering the landfill by water pressure.
(2) Since no metallic material is used, it is possible to improve the measurement / analysis environment and ensure accuracy at the final disposal site using an electric water leakage detector.
(3) By applying to concrete underground piles of buildings, underground piles can be prevented from corroding due to the influence of geology and groundwater quality.
(4) The projecting part of the leachate collection drainage pipe is liquid-tightly joined by the water shielding sheet and the sealing water shielding sheet, so that the landfill from any place except the leachate collection drainage pipe can be Sewage does not leak to the outside.
(5) It is applicable not only to pillars and other vertical shafts at the final disposal site, but also to any concrete structure that penetrates the water shielding sheet, such as pits, dredging, drainage pipe protection concrete, and inspection gallery.
(6) Not limited to final waste disposal sites, it can also be applied to facilities that provide water shielding with water shielding sheets such as reservoirs and dams.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a covered-type waste final disposal site according to first to third embodiments of the present invention.
FIG. 2 is a schematic view showing an example of a water shielding structure around a concrete column erected on the slope portion of the first embodiment of the present invention.
FIG. 3 is a schematic view showing another example of a water shielding structure around a concrete column erected on the slope portion of the first embodiment of the present invention.
FIG. 4 is a schematic view showing a water-blocking structure around a concrete column that is erected on the bottom surface of the first embodiment of the present invention.
FIG. 5 is a detailed cross-sectional view of a part A in FIGS.
6 is a detailed cross-sectional view of a portion B in FIGS. 2 to 4; FIG.
7 is a detailed cross-sectional view of a portion C in FIGS. 2 and 3. FIG.
8 is a detailed cross-sectional view of a D part in FIGS. 2 and 3. FIG.
9 is a detailed cross-sectional view of a portion F in FIG.
FIG. 10 is a first process diagram for sequentially explaining a construction procedure in the first embodiment of the present invention.
FIG. 11 is a second process diagram for sequentially explaining the construction procedure in the first embodiment of the present invention.
FIG. 12 is a third process diagram for sequentially explaining the construction procedure in the first embodiment of the present invention.
FIG. 13 is a fourth process diagram for sequentially explaining the construction procedure in the first embodiment of the present invention;
FIG. 14 is a fifth process diagram for sequentially explaining the construction procedure in the first embodiment of the present invention;
FIG. 15 is a structural explanatory diagram showing the configuration and structure of a second embodiment of the present invention.
16 is a detailed cross-sectional view of the main part of FIG. 15;
FIG. 17 is a side view showing a schematic configuration of a third embodiment of the present invention.
18 is a front view corresponding to FIG.
19 is a detailed cross-sectional view taken along the line XX of FIG.
[Explanation of symbols]
1 ... Landfill 2 ... Roof 3 ... Concrete structure (concrete pillar or structure)
4, 40 ... Water-proof sheet 5, 50, 55 ... Anchored sheets 6, 65 ... Water-proof sheet 8 ... Raw water pit 30 ... Formwork 65 ... Sealing sheet 90 ... leachate collection drain pipe 95 ... seepage water collection drain pipe

Claims (6)

In a water-blocking method for a covered-type waste final disposal site covered by covering means extending above a landfill, a plurality of water-blocking sheets are fixed to a vertical surface of a concrete structure for supporting the covering means. Sheet mounting process with anchors in which the anchored sheets are arranged and mounted in advance so that overlapping margins are formed on the inner peripheral surface of the concrete structure formwork, and a plurality of molds to which the plurality of anchored sheets are attached An assembly process for assembling the frames, a concrete placing process for placing ready-mixed concrete in the assembled formwork, a formwork demolding process for removing the formwork after the placed concrete has hardened, and a formwork And a joining step of joining adjacent anchored sheets together by the overlap margin after being removed, and the adjacent sheets attached to the concrete structure are joined together. Sheet in with the anchor, seepage control method of coating type waste final disposal site structure, characterized by joining a water shield sheet which is laid by the thermal welding. An area where there is no anchored sheet above the anchored sheet of the formwork, a step of adding and attaching the anchored sheet one or more times in the order of the anchored sheet, and an anchor while being superimposed on the anchored sheet by the overlap margin And a step of covering the region without the attached sheet with a water-impervious sheet. In order to shield the vertical surface of the concrete structure for supporting the covering means with the water shielding sheet in the water shielding structure of the covered waste final disposal site covered by the covering means extending above the landfill, A plurality of anchored sheets for fixing the water-impervious sheet, a concrete structure attached so that adjacent boundary portions of the anchored sheets are overlapped with each other and cover a vertical surface, and a bottom surface of the landfill And a water shielding sheet laid on the slope part, and the water shielding sheet laid on the anchored sheet attached to the concrete structure is joined by heat welding. Water shielding structure of the structure of the covered waste disposal site. One or more anchored sheets are added in the order of the area without the anchored sheet and the anchored sheet above the anchored sheet of the formwork, and the area without the anchored sheet is overlapped with the anchored sheet by the overlapping margin part. 4. The water shielding structure for a structure of a coated waste final disposal site according to claim 3, wherein the structure is covered with a combined water shielding sheet. A step of covering the vertical surface of the end of the landfill with a water shielding sheet having a hole penetrating the protruding portion of the leachate collecting and draining pipe projecting to the vertical surface of the end of the landfill, and the leachate collecting and draining pipe Covering the predetermined area of the protruding portion of the water-proofing sheet, and wrapping the periphery of the hole portion of the water-proof sheet, and covering the hole portion of the vertical surface with another water-proof sheet. Impermeable construction method for structures at final disposal sites. A water-impervious sheet covering the vertical surface of the end of the landfill with a hole penetrating the protruding portion of the leachate collection / drainage pipe projecting to the vertical surface of the end of the landfill; and A water shielding sheet that covers a predetermined region of the projecting portion and covers a hole portion of the water shielding sheet, and is wrapped with the periphery of the hole by the water shielding sheet, A water-blocking structure for a structure of a covered-type waste final disposal site, characterized by being configured to cover a hole.

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