JP2007247309A - Construction method of seepage control processing layer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction method of a seepage control processing layer which can make the favorable use of seepage control performance at the connection of a seepage-control sheet and which can facilitate the formation of a seepage-control structure when the partitioning bank protection of a waste-treatment facility is constructed. <P>SOLUTION: Seepage control structures 6, 7 are constructed on the surface of the inland sea side of the bank protection 1 partitioning a landfill site by placing the seepage-control sheet so that it covers the surfaces of riprap layers 5, 5a. At the connection of each of the seepage-control sheet comprising the seepage control structures 6, 7, an adhesive is caught in a part where ends of the seepage-control sheet are overlapped. Then the seepage-control sheets are connected to each other by wires, and asphalt is poured so that it has a predetermined width and thickness. Then the processing for constructing an additional seepage-control layer is performed, and seepage-control performance, the durability and reliability of the seepage control structures can be improved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  In the present invention, when constructing a revetment or the like for partitioning the inside of an artificial island constructed as a waste sea surface disposal site or the like with the outside sea, the partition is made so that water does not flow out from the inside to the outside sea. In particular, the present invention relates to a water shielding method at a connecting portion of a water shielding sheet.

  In cities where waste is discharged in large quantities, the sea area in the vicinity is partitioned, and a disposal site for landfill disposal of waste is constructed. Water is blocked so that does not touch. When constructing the waste landfill site in such a way as to partition the sea surface, generally, a partition revetment is constructed so as to divide the landfill. The ground improvement work to strengthen the ground will be implemented. After that, in the place where the ground has been improved, a masonry foundation is constructed at a predetermined height, the upper surface thereof is leveled, and then a means such as a caisson or the like is installed on the foundation. A construction method that constitutes partitioning means for partitioning is generally used.

  For the masonry foundation and the caisson-like structure that is installed and built on it, on the back side (waste landfill side), construct a discarded stone layer to have a predetermined thickness, The slope on the back side is set at an angle where the rubble is stable. By performing a treatment that exhibits water shielding for the surface of the abandoned stone layer, and also by performing a treatment to provide water shielding for the seabed ground, the inside of the section where the waste has been landfilled, Processing is performed so that water does not circulate with the open sea. For example, in the case where the seabed ground is sand or the like, and the ground is considered to be unable to ensure water shielding, the water shielding treatment is also performed by performing ground improvement work to form a water shielding layer.

  Examples of the sheets used for the water shielding include, for example, a plastic sheet having a property that does not easily pass through water, such as a thin rubber sheet or vinyl chloride. Is often used. In addition, asphalt mat made as a thin but strong sheet, such as impregnated asphalt component in a strong non-woven fabric, etc., or used for water shielding treatment in protecting the seabed ground or revetment A mat having a thickness of 5 to 10 cm, such as an asphalt mat, may be used.

In the sea surface landfill site, in order to prevent water permeation from the caisson and other structures installed on the masonry foundation and from the joint between the caissons, generally a rubber partition material having elasticity Are arranged between the caissons with a predetermined interval. Furthermore, a water-impervious treatment is performed so as to prevent the retained water from leaching out between joints such as caisson by performing a treatment such as filling an asphalt mixture between the partition materials. Further, when the sea surface landfill disposal site is constructed as an artificial island by dividing the sea surface within a predetermined range, for example, as described in JP-A-2002-59108 (Patent Document 1), Water-impervious methods may be used, and the surface of the masonry foundation on which the caisson is placed is also constructed with a combination of treatments that demonstrate water-imperviousness. Securing is also done.
JP 2002-59108 A

  However, when the waterproof sheet is constructed in the sea, especially when the waterproof sheet is relatively thin and light, the laid sheet is affected by wind and waves. It is difficult to lay exactly where it is needed. In addition, on the back side of the reclamation revetment, when trying to construct the water shielding sheet for a wide area such as the slope of a discarded stone layer, the end of the sheet is adhered or welded, etc. It is necessary to connect by means and construct so as to cover a predetermined area. When constructing a water shielding layer by laying a large number of the above water shielding sheets, it is necessary to connect the connecting parts of the sheets underwater. I need to do it. Therefore, on the seam portion of the water shielding sheet, the sheets are stacked so as to sandwich an asphalt mixture plate or the like, or the asphalt mixture is formed in a band shape with a predetermined thickness and width on the upper surface of the seam of the sheet. It is conceivable to construct and maintain the water barrier.

  However, it is required to perform a very troublesome construction to construct the asphalt mixture layer in the sea so that the layer of the asphalt mixture has a certain thickness and width at the connection portion such as the water shielding sheet. In addition, laying a water shielding sheet on the slope of a masonry foundation constructed by stacking stones on the seabed or on the slope of a discarded stone layer is a major obstacle to unevenness and slope of the sheet surface. . Therefore, the surface portion of the abandoned stone layer is treated so as not to have as large unevenness as possible, to make the slope of the slope gentle, and to make the stone on the surface side of the masonry foundation small. In addition, the water shielding sheet or the like is prevented from being damaged.

  By the way, the work of laying a water shielding sheet or the like on the surface of a stone wall with large unevenness as described above, the work of constructing a seal of an asphalt mixture on the joint portion of the water shielding sheet, etc. All of these are performed by submersibles on the sea floor. Therefore, in order to ensure the stability of the result of the work, it is required to simplify the work process and procedure in the sea so that the seal of the asphalt mixture can be completely applied.

  The present invention makes it possible to easily construct a water-impervious layer at the connecting portion of the sheet, improve the reliability of the water-impervious layer constructed in the sea, and ensure the water-impervious performance for a long period of time. The purpose is to obtain a water shielding layer.

[Technical Field] The present invention relates to a water-impervious work constructed by laying a water-impervious sheet vertically and horizontally on an inner surface of a landfill side of the revetment on a partition revetment that divides a waste sea surface landfill disposal site.
Invention of Claim 1 arrange | positions the water-impervious sheet | seat laid as the said water-impervious work, the edge part is piled up by predetermined width,
An additional water shielding layer having a predetermined thickness, width and length is formed as a protective layer on the overlapping portion of the water shielding sheet.

  In the invention according to claim 2, the additional water shielding layer disposed so as to cover the upper end portion of the water shielding sheet is disposed so as to cover the connection portion, and the inside of the mold frame. It is characterized by being filled with an impermeable water-impervious material.

The invention of claim 3 corresponds to the additional water shielding layer provided so as to cover the upper end of the water shielding sheet.
In the part where the end portions of the water shielding sheet are overlapped, a means for connecting between the water shielding sheets where the end portions are stacked is provided,
The water-imperviousness in the water-impervious work is improved.

Invention of Claim 4 arrange | positions so that the said connection part may be covered, and the formwork which makes the inside impregnated with a water-impermeable impermeable material and constitutes the connection part having a predetermined thickness, width, and length,
Constructed by connecting a substantially gate-shaped formwork member whose lower surface is open, and using a combination that can be bent corresponding to the unevenness of the ground laying the water shielding sheet,
It is characterized in that the slope portion and the horizontal portion of the connecting portion can be continuously constructed.

The invention of claim 5 is a mold formed by connecting a substantially gate-shaped formwork member having an open bottom surface, and an elastic body layer is provided on the bottom surface of the leg member of the formwork,
Even if there is unevenness in the ground on which the water-impervious sheet is laid, a layer of a water-impermeable water-impervious material can be constructed so that no gap is generated on the lower surface of the mold by the elastic body.

The invention of claim 6 is configured such that the gate-shaped formwork member has a weight capable of resisting the pressure of the material when the interior space is filled with the water-impermeable impermeable material. Alternatively, a means for preventing the formwork member from being lifted is additionally provided.
According to a seventh aspect of the present invention, the gate-shaped formwork member includes a member having a tension capable of resisting the pressure of the material when the inner space is filled with the water-impermeable water-impervious material, and a cylindrical one. It is characterized by comprising.

  The invention according to claim 8 is a water-impervious structure constituted by laying a large number of the water-impervious sheets, and in a portion where the end portions of the water-impervious sheets are overlapped, the water-impervious water-impervious imprint between the stacked water-impervious sheets. By providing the material component in between, the water shielding property of the water shielding work is improved.

Invention of Claim 9 uses what attached another sheet piece as an overlap sheet on a water-proof sheet main part at the edge part around the water-proof sheet,
When overlapping the end portions of the water-impervious sheet provided with the overlap sheet, the sheet pieces are stacked in the same manner as the lower sheet body on top of each other.
The water-imperviousness in the water-impervious work is improved.

The invention of claim 10 is a water shielding work constituted by laying a large number of the water shielding sheets.
When the end portions of the water-impervious sheet provided with the overlapping sheet are stacked, the sheet bodies are stacked on top of each other, and the sheet pieces are stacked in the same manner as the lower sheet body, and the water-impermeable impermeable water between the sheets. It is characterized by being provided with material components in between.

The invention according to claim 11 is a water-impervious structure constituted by laying a large number of the water-impervious sheets, and in a portion where the end portions of the water-impervious sheets are overlapped, an impermeable water-impervious material between the stacked water-impervious sheets. While sandwiching the ingredients,
On the said connection part, while using the means to connect water shielding sheets together, while controlling the position shift of the said water shielding work, the intensity | strength was improved more, It is characterized by the above-mentioned.

In the invention of claim 12, with respect to the portion where the end portions of the water-impervious sheet are overlapped, the water-impervious water-impervious material is sandwiched between the sheet portions by overlapping the overlap sheet, and Provide additional connection means to connect,
An additional water-impervious layer is constructed so as to cover the connection portion.

  The invention according to claim 13 is a water-impermeable water-impervious material provided in a portion where the end portions of the water-impervious sheet are overlapped with each other, and a plurality of holes are provided in the overlap portion sheet, and the respective water-impervious sheets are overlapped. Is used as a means for connecting the overlap sheet and each layer of the water shielding sheet to improve water shielding.

The invention according to claim 14 is positioned on the inner surface of the mold frame with respect to the leg members on both sides of the mold frame for the water shielding material poured into the overlap portion with respect to the portion where the end portions of the water shielding sheet overlap. So that the standing member protrudes on the upper surface of the water shielding sheet,
The water-impermeable water-impervious material is poured in a state where the standing member is placed along the inner surface of the leg member of the formwork.

The invention of claim 15 is configured such that the standing member provided to project from the upper surface of the end portion of the water-impervious sheet is a sheet-like member extended greatly,
The sheet-shaped material is disposed so that the end portions of the sheet-like material are overlapped with the inner surface of the mold, and a water shielding material is poured into the mold.

According to a sixteenth aspect of the present invention, the substantially gate-shaped formwork material having an open bottom surface is formed using a fiber or sheet-like material, and the leg members of the formwork are of a sandbag shape having a square cross section. Configure
The upper member arranged on the two leg members on both sides is composed of a sheet-like member,
In order to pour the impermeable water-impervious material into the gate-shaped space of the formwork material, a means for preventing the formwork member from being lifted is additionally provided.

  The invention according to claim 17 is a water-impervious layer constructed of a material that can be constructed as an asphalt layer, a concrete layer, a chemical layer, and a soil layer as the water-impervious water-impervious material. It is characterized by.

  By having constituted as mentioned above, in the impermeable work constituted by connecting the impermeable sheet, the strength at the portion where the end of the impermeable sheet is connected can be improved. And even when a water-impervious work is applied to a slope with many irregularities, it is easy to confine the waste to be disposed of in landfills without leaking from the connection part of the water-impervious sheet. . Moreover, in the connection part of the said water-impervious sheet, in addition to overlapping the end parts of the water-impervious sheet, an additional sheet member is stacked, or a water-impervious material such as an adhesive is interposed between the sheets. Further, it is possible to further improve the water shielding property at the connection portion. Furthermore, as the water-impervious water-impervious material, it can be constructed using any material capable of exhibiting water-imperviousness of asphalt, concrete, soil or chemical compounds. It can be used.

  In addition, when constructing an additional water-impervious layer that covers the upper part of the connection part of the water-impervious sheet, the formwork positioned to partition the additional water-impervious layer corresponds to a horizontal plane and a slope. Thus, it can be configured with a combination of segments whose shapes can be changed, and an additional water-impervious layer can be continuously formed on an arbitrary surface. Then, by pouring a water shielding material such as asphalt into the mold and solidifying it, an additional water shielding layer having an arbitrary thickness and width can be provided, and the construction of the additional water shielding layer is facilitated. This can be done and the reliability at the connecting portion of the sheet can be improved.

  The construction method of the water-impervious treatment layer according to the present invention will be described in accordance with the illustrated example. In the examples described below, as the water-impervious water-impervious material, asphalt layer, concrete layer, chemical layer, soil layer However, in the following description, an example using an asphalt mixture will be described as a representative example, but in addition, any other material may be used. Of course, an additional water shielding layer can be constructed using the above materials.

  The partition revetment of the waste disposal site illustrated in FIG. 1 is shown as one example of constructing a revetment using a caisson. In the partition revetment 1 shown in FIG. 1, a masonry foundation 3 is constructed on the seabed ground 2, and a caisson 4 is placed on the masonry foundation 3, and the caisson is constructed as a wall on the open sea side. . When the submarine ground that constructs the masonry foundation 3 is soft ground, ground improvement work that reinforces the ground is constructed to provide a ground that has the strength to withstand the weight of the structure. Further, when the seabed ground is sandy or the like and there is a problem with the water permeability of the ground, the ground improvement work to make the water-impermeable ground is performed in the same manner as the conventional example.

  An asphalt mat or the like is laid on the masonry foundation 3 of the partition revetment 1, and a caisson 4 is placed on the inland sea side of the caisson. The water shielding layer may be constructed over the predetermined range. In addition, without using a heavy mat such as an asphalt mat, a water-impervious construction laying a sheet that is thin, easy to handle, and can exhibit good water shielding properties, such as a vinyl sheet or rubber sheet There are many cases of using. As the water-impervious work, construction is performed on the inner sea surface side of the masonry foundation 3 and the structure 4 as in the example of the partition revetment 1 shown in FIG.

  On the inland sea side of the revetment, abandoned stone layers 5 and 5a are constructed with a predetermined thickness as necessary, so that the abandoned stone layer 5. 5a and the substantially horizontal surface of the seabed 2 are covered. The water shielding works 6 and 7 are applied over a predetermined range. Since the desert stone layers 5 and 5a are laid with a sheet of a water-impervious layer on the slope, the surface is a stone or debris layer with as small a grain as possible, and a water-impervious sheet laid on the upper surface thereof. Is processed so that the large convex portion does not protrude from below.

  As shown in FIG. 1, when the water shielding sheet is laid out as a water shielding work laid so as to cover the surface of the discarded stone layers 5, 5 a, as shown in FIG. 2, Arrange so that the ends overlap. And in the connection parts 15 and 16 of each sheet, the asphalt mixture is applied in a strip shape so as to have a predetermined width and thickness so as to cover the upper surface of the connection part, and water shielding at each connection part is performed. It is configured so that it can be exhibited well. Therefore, in the water-impervious work 6, when laying a large number of the water-impervious sheets 10. It will be carried out as work in

  When constructing the water-impervious constructions 6, 7, the asphalt mixture is cast in water at the entire portion where the end portions of the respective water-impervious sheets 10. It is necessary to construct an additional water shielding layer 17 having Therefore, in order to efficiently perform the additional water shielding layer 17 on the portion where the sheets are overlapped, means for reducing the burden of diving workers on the sea floor by using a formwork member for constructing the asphalt mixture. Is used. As the formwork member, members having various configurations as described in FIGS. 3 to 7 can be used.

  In addition, since the place where the form member illustrated below is used is the seabed, even when placing asphalt in water, a material having a large specific gravity such as iron is used so that the installation state can be stabilized. A description will be given by taking what has been configured as an example. In this way, even when the formwork is configured to be heavy, a large device adapted to the work so that it can be easily handled even when the formwork is suspended and moved using a crane or the like. May be used. In addition, when the asphalt can not be secured with only the formwork member, a heavy object is placed as an anchor on the formwork member to improve the stability when constructing asphalt. It is advisable to use additional means.

  The formwork member 20 shown in FIG. 3 can be used when the target location for constructing the additional water shielding layer is horizontal. In this formwork member 20, leg members 21 and 21a positioned on both sides are connected to each other by an upper connecting plate 22, and the width of the asphalt layer to be placed in the formwork member is set to the both sides. The leg members 21 and 21a can be set. And, in the case of an upwardly opening formwork member as shown in this example, asphalt can be driven from above, so that it is possible to improve work efficiency at a horizontal construction site.

  The formwork member 20a shown in FIG. 4 is configured as a formwork member having a substantially portal-shaped cross section in which the leg members on both sides are connected by a top plate in a closed state so as not to provide a gap in the upper part. In the example of the mold member 20a, in order to configure it as having an arbitrary length, a number of portal-shaped short members are connected. In the connecting portion 25 for connecting the unit body 23 of the formwork, for example, the connection plate 26 is used to screw the front and back formwork unit bodies so that the connection can be easily performed. May be. In addition, the members such as screws for connecting to the shape of the formwork unit body 23 can be of any configuration, and workability is improved when hanging and moving with a crane. Anything can be used as long as it can be demonstrated.

  The example shown in FIG. 5 has shown the case where construction is possible at once using one formwork member, when the target position which constructs the water-impervious construction 6 covers a horizontal surface and a slope. In this example, the formwork member 20b has a relay frame 28 attached to the formwork unit 23 corresponding to the horizontal part according to the angle of the inclined surface with respect to the horizontal part. Further, the relay frame 28 can be constituted by connecting a plurality of narrow ones, but the state of bending in the vertical direction can also be set as a curved one.

  In addition to arranging one relay frame 28 at a predetermined position as shown in FIG. 5 to deal with one bent portion, as shown in FIG. A long frame member 20 can be configured by connecting a frame corresponding to the horizontal portion. Of course, in the example shown in FIG. 6, asphalt is poured from above, so that the upper horizontal portion uses an upper opening frame member as shown in FIG. 3, and the inclined portion and the lower horizontal portion are used. Corresponding means such as using a formwork unit configured as shown in FIG. 4 is applied.

  Further, as described above, when the formwork member is configured to be long, it is an indispensable requirement that an allowance sufficient for the asphalt to flow down is provided in the internal space, and additional shielding is required. It is a necessary requirement that the formwork member be easily removed after construction of the water layer so that it can be reused elsewhere. In the example of the mold member 20 shown in FIG. 6, the inflection part between the horizontal part and the slope part is combined with the linear mold unit arranged at the horizontal part and the slope part, and the angle Relay frames 28 and 28a having a shape corresponding to the change are arranged. As described above, when the relay frame corresponding to the bent portion is provided and configured, a long mold member can be easily formed, and the construction of the additional water shielding layer can be easily performed.

  In the example shown in FIG. 6, an asphalt mat 19 is laid in advance on the surface of the discarded stone layer 5 at a position corresponding to the water shielding work, and the overlapping portion of the water shielding sheet to be laid thereafter is easily positioned. In this way, the reliability of the water shielding treatment at the connecting portion can be maintained satisfactorily. In the water-impervious work, the connecting portion 15 can be formed as illustrated in FIG. In this example, an asphalt mat 19 is laid in advance at the lower part of the portion where the end portions of the water shielding sheet overlap, and the ends of the water shielding sheets 10 and 10a on both sides are stacked on the mat. In the part where each sheet member is overlapped, the adhesive 31... Is disposed between the sheets so as to be adhered without a gap. Further, the asphalt is placed on the connecting portion 15 after the formwork member 20 is disposed, and the connecting portion can be pressed and held by the asphalt.

  Although one example is shown in FIG. 7, in the water-impervious work constructed by laying the water-impervious sheets side by side, improving the water-imperviousness of the water-impervious work and improving the reliability of the water-impervious work In order to demonstrate, the state which piles up the edge part of a water-impervious sheet, and the method of the water-shielding process in the overlap part are considered variously. First, using the example shown in FIG. 8, the end portions of the water shielding sheets 10 and 10a are arranged in a state of abutting, and the formwork member 20 is positioned so as to cover the abutting portion of the water shielding sheet. The inside of the space is filled with asphalt to construct an additional impermeable layer. In this way, when the asphalt layer is formed on the end of the water-impervious sheet simply by abutting, only by holding the end of the water-impervious sheet by the additional water-impervious layer, When the tensile force acts on the impermeable sheet, the reliability of the impermeable construction becomes small.

  In the example shown in FIG. 9, the end portions of the water shielding sheets 10 and 10 a are arranged so as to overlap each other, and the formwork member 20 is arranged so as to cover the connection portion, thereby constructing an additional water shielding layer of asphalt. . In that example, in the part where the end portion of the water shielding sheet is overlapped, for the end portion of the water shielding sheet held by the additional water shielding layer, even if the holding action is to be exhibited well, When a local pulling action is applied to the water shielding sheet, a slight weakness is exposed. Therefore, in order to strengthen the overlapping portion of the water shielding sheet, as shown in FIG. 10, it is conceivable to provide the adhesive 31 so as to be sandwiched between the overlapping portions of the water shielding sheet, thereby strengthening the overlapping portion. And it becomes possible to improve the reliability of a water-impervious work more by exhibiting the adhesive effect in the overlap part of the said water-impervious sheet favorably.

  In forming the additional water-impervious layer, the mold member is disposed in correspondence with the overlapping portion of the water-impervious sheet, and the mold is filled with asphalt in the inner space of the mold member. If there is a gap in the portion where the leg member of the frame member is in contact with the water-impervious sheet, the asphalt placed at the seam of the water-impervious sheet will flow out of the form member and be consumed wastefully. Therefore, in order to prevent the poured asphalt from leaking out from the portion where the leg member of the mold member is in contact with the water shielding sheet, as shown in FIG. 11, standing members 32, 32a are provided on the upper surface of the water shielding sheet. Is provided to protrude. Then, by positioning the standing members 32 and 32a so as to be along the inner surfaces of the leg members of the formwork member, the asphalt that flows into the formwork member and fills is formed under the leg member and the sheet. So that it can be prevented from flowing out through the gap. Furthermore, in this explanatory drawing, it is possible to further improve the reliability of the impermeable construction by sandwiching the adhesive 31 between the overlapping portions of the impermeable sheet and pressing and holding it with the additional impermeable layer. It becomes.

  In addition to FIG. 11, the example described in FIG. 12 describes another embodiment for preventing the asphalt flowing into the mold from flowing out. In that example, when providing the formwork member 20 to the connecting portion of the sheet of the water shielding layer, elastic bodies 38 and 38a such as rubber are attached to the lower side of the leg members of the formwork member 20, and the stones are discarded. Even if there are large irregularities on the surface of the layer, a gap generated between the sheet and the leg member is closed by the elastic body. It is also possible to further improve the reliability of the water shielding work by preventing the asphalt that has flowed into the connecting portion from flowing unnecessarily. It should be noted that the elastic body attached to the leg member of the formwork member 20 should not have a gap with respect to the expected unevenness even if the unevenness occurring in the overlapping portion of the water shielding sheet is large. Any kind of elastic body can be used.

  In the example shown in FIG. 13 and subsequent figures, means for further improving the reliability of the sheet overlap portion of the water shielding sheet is described. In the example shown in FIG. Upper sheet members 33 and 33a are respectively provided. As the upper sheet member, a thin sheet of rubber or vinyl is used, and one side portion thereof is adhered and attached to a water shielding sheet to constitute an overlapped sheet. As shown in the figure, the water shielding sheet provided with the upper sheet member is arranged so that the upper sheet member is stacked on the water shielding sheet body, and an asphalt layer is constructed so as to cover the upper sheet member. An additional water shielding layer is provided. In addition, when an arbitrary adhesive is placed and pressed on the part where the respective sheet members are overlapped, a sufficient effect is exerted on water shielding at the connecting portion and tensile force acting on the water shielding sheet. It becomes possible to make it.

  The example shown in FIG. 14 describes the case where the connection process described in FIG. 11 is subjected to a connection process that can improve the reliability. In this example, in addition to providing the standing members 32 and 32a so as to protrude from the upper surface of the water-impervious sheet 10, 10a, a sheet-like material is further extended at the upper end of the standing member. . When the mold 20 is provided so as to cover the joint, the outer periphery of the inner space of the mold is covered with a sheet-like member, and when the additional water-blocking layer is constructed, It is possible to prevent a gap from being generated at the lower surface portion of the leg member, and it is possible to prevent the water shielding material from leaking also at the overlapping portion 32A of the sheet.

  The example shown in FIG. 15 describes one example in which processing is performed so that the strength is higher than that of the connection portion described in FIG. 13 and the reliability can be further improved. In this example, the end portion of the water-impervious sheet and the upper sheet members 33 and 33a are overlapped with each other by sandwiching and adhering the water-impervious material 31 having adhesive performance, and further, the attachment portion of the upper sheet member The base of the connection members 37 and 37a is attached to the water-impervious sheet at a position deviated from the position, and the ends of the two connection members are connected by the overlapping portion 37A so that they are overlapped at the connection portion of the sheet. The strength at the sheet portion is increased.

  The connecting member may be a belt / band-shaped member having an arbitrary width, and can be fastened with a wire at the overlapping portion, a connecting member called a Velcro fastener, or an hook / Locking means or the like can be used. In addition to the above configuration, in this embodiment, by arranging the standing members 32 and 32a in correspondence with the inner surfaces of the leg members of the mold member, the mold member is the same as in the case of FIG. The asphalt that has flowed into the interior of the interior is prevented from flowing out to the side, and a void is formed in the additional water shielding layer, and wasteful consumption of the filler can be eliminated.

  As described in each of the above embodiments, the water shielding sheet is laid not only by simply overlapping the water shielding sheet but also by providing an additional connection means for the portion where the sheet end portions are overlapped. In the impermeable construction constructed in this way, even when a tensile force or the like acts on the impermeable sheet, it is possible to prevent water leakage from occurring in the impermeable construction. In addition, when constructing the additional water-impervious zone in the connection part, as the material, it is possible to use any water-impervious material in addition to asphalt, but at present, cost and workability, In the state where a water shielding material exceeding that of asphalt is not found, asphalt can be mainly considered.

  In addition, the water-impervious work constructed as described above can be adequately dealt with by simply constructing the additional water-impervious zone of asphalt on the connection part, but there are others on the lower surface of the connection part of the water-impervious sheet. It is possible to provide additional means for laying the water shielding sheet as required. In addition, when providing the asphalt at the connecting portion of the sheet, a nonwoven fabric or the like is laid on the connecting portion of the water shielding sheet, and when the asphalt is poured, the non-woven fabric becomes the core of the asphalt layer, thereby providing more reliability. It is also possible to construct a water barrier with improved properties.

  In addition to the above-described embodiments, in the present invention, as illustrated in FIGS. 16 and 17, there are many portions for connecting the water shielding sheets 10 and 10 a to the upper sheets 33 and 33 a as shown in FIG. 13. Are provided at predetermined intervals. The holes 33e, 33f,... Provided in the upper sheet can be configured to have an arbitrary size. However, the upper sheets 33, 33a provided with the large number of large holes are stacked in the overlapping portion of the sheets 10, 10a. When the water shielding material or adhesives 31, 31a, 31b are sandwiched between the sheets, the water shielding materials that pass through the holes in each sheet connect the upper and lower water shielding layers, It becomes a state to become. Therefore, when the sheets 33 and 33a provided with a large number of holes 33e and 33f as shown in FIG. 17 are overlapped and a water shielding material is allowed to flow from the top to enter the holes, the end of the stacked sheets is It is in a connected state with one adhesive.

  As illustrated in FIGS. 16 and 17, at the portion where the water shielding sheets 10 and 10 a are connected, an end portion of a plurality of sheets is integrated by using an adhesive or the like, so that the connection portion or the overlapping portion of the sheets is obtained. The strength at can be further strengthened. In addition, as shown in FIG. 16, in the overlapping portion 15 of the sheet, even if the water shielding material layer to be constructed from above is formed as a relatively thin layer as indicated by reference numeral 31 c, The adhesive layers 31a and 31b can integrally exhibit a water shielding effect. For the connection part of FIG. 16, as in the other embodiments, a gate-shaped frame member is installed, and the interior space of the frame body is filled with a water shielding material and solidified, and added. A means for constructing a water shielding layer may be applied.

  In each of the above-described embodiments, the case where the additional water shielding layer is constructed using iron or another metal having a large specific gravity as the mold member has been described as an example. Apart from the above embodiments, in the example described in FIG. 18, the formwork member is configured to have flexibility formed from a sheet-like member. This formwork member 40 has a substantially gate-shaped cross section, and is provided with a space 43 for forming an additional water shielding layer therein. The leg members 41 and 41a of the formwork member 40 having flexibility are formed as a bag-like material made of a sheet-like material, and filled with a water shielding material or a debris that becomes a weight inside. The shape is maintained. Further, the upper member 42 disposed so as to connect the leg members 41 and 41a is also composed of a sheet or the like. As a sheet material which comprises each said member, there exists water permeability, or it can comprise using the arbitrary sheet-like thing of water-impermeable.

  In the example of the mold member having flexibility, the member positioned at the lower end only needs to be provided with an end closing portion 43a for closing the end as shown in FIG. And in the formwork member 40 comprised as mentioned above, in order to maintain a gate-shaped shape, the shape maintenance means between the leg parts of both sides and an upper member is additionally provided using arbitrary materials. However, with respect to the length direction of the frame, even if there are large irregularities in the laying part or the inclination angle changes in the middle, additional water shielding Layers can be easily constructed. In addition, when using the formwork member having the flexibility, when a sheet material having water permeability is used, water in the internal space is easily removed by a water shielding material poured from above the slope. Since it is pushed out, the water shielding material can be easily filled in the interior space of the mold.

It is explanatory drawing which shows the structure of the revetment of a waste disposal site. It is a top view of a water-impervious construction. It is explanatory drawing which shows the structure of a formwork member. It is explanatory drawing of a gate-shaped formwork member. It is explanatory drawing of a structure of the formwork member matched with the inflection part. It is explanatory drawing of the formwork member of a shape different from FIG. It is sectional drawing of a connection part. It is explanatory drawing of the fundamental structure of a connection part. It is explanatory drawing of the connection part which piled up only the edge part of the water-impervious sheet. It is explanatory drawing of the example which connects the overlap part of the edge part of a water-impervious sheet with an adhesive agent. It is explanatory drawing of the example which seals the lower part of a formwork with the standing member provided on a water-impervious sheet. It is explanatory drawing of the example which provided the sealing means in the leg edge part of the formwork member. It is explanatory drawing of the reinforcement | strengthening measure of the connection part of a water-impervious sheet FIG. 13 is an explanatory diagram of an example in which the sealing means of FIG. 12 is further extended. It is explanatory drawing of the example which integrates the reinforcement | strengthening measure of the connection part of a water shielding sheet. It is explanatory drawing of the reinforcement | strengthening measure of the connection part of a water shielding sheet. It is explanatory drawing of the example which provided the hole in the connection part of the water shielding sheet. It is explanatory drawing of the example using the formwork which has a softness | flexibility. It is explanatory drawing of a structure of the edge part member of the formwork of FIG.

Explanation of symbols

1 Revetment, 3 Masonry foundations, 4 Structures, 6-7 Impervious work,
10 water shielding sheet, 14 sheet stacking part, 15.16 connecting part,
17 Additional water shielding layer, 19 Asphalt mat,
20 formwork members, 21 leg members, 23 formwork unit bodies,
25 connection part, 28 relay frame, 30 connection part, 31 adhesive,
32 standing members, 33 upper sheet members, 35 connecting members,
38 sealing member, 40 flexible formwork member, 41 leg member,
42 Upper member, 45 sheet bag, 46 filling.

Claims (17)

A water barrier constructed by laying water barrier sheets vertically and horizontally on the inner wall of the landfill side of the revetment on the partition revetment that divides the waste sea surface landfill disposal site,
The impermeable sheet to be laid as the impermeable work is arranged with its end portions overlapped with a predetermined width,
A construction method for a water-impervious treatment layer, wherein an additional water-impervious layer having a predetermined thickness, width, and length is formed as a protective layer on the overlapping portion of the water-impervious sheet. The additional water-impervious layer arranged to cover the top of the end portion of the water-impervious sheet,
The construction method of a water-impervious treatment layer according to claim 1, wherein a mold is disposed so as to cover the connecting portion, and the impermeable impermeable material is filled in the mold. . Corresponding to the additional water shielding layer provided to cover the top of the end of the water shielding sheet,
In the part where the end portions of the water shielding sheet are overlapped, a means for connecting between the water shielding sheets where the end portions are stacked is provided,
The construction method for a water-impervious treatment layer according to claim 2, wherein the water-imperviousness is improved in the water-impervious work. The mold that is arranged so as to cover the connection part, and that constitutes the connection part having a predetermined thickness and width and length by filling the inside with a water-impermeable impermeable material,
Constructed by connecting a substantially gate-shaped formwork member whose lower surface is open, and using a combination that can be bent corresponding to the unevenness of the ground laying the water shielding sheet,
The construction method for a water-impervious treatment layer according to any one of claims 1 to 3, wherein the slope portion and the horizontal portion of the connection portion can be continuously constructed. In the mold formed by connecting the substantially gate-shaped mold member with the lower surface opened, an elastic layer is provided on the lower surface of the leg member of the mold,
The impermeable water-impervious material layer can be constructed in such a manner that a gap is not generated on the lower surface of the formwork by the elastic body even when there is unevenness in the ground on which the water-impervious sheet is laid. Item 5. A construction method for a water shielding layer according to any one of Items 2 to 4.   The gate-shaped formwork member has a weight capable of resisting the pressure of the material when the interior space is filled with the water-impermeable impermeable material, or prevents the formwork member from being lifted The construction method for a water-impervious treatment layer according to any one of claims 2 to 5, wherein means are additionally installed.   The portal-type formwork member is configured by using a member having a tension capable of resisting the pressure of the material and a cylindrical member when the inner space is filled with the water-impermeable impermeable material. The construction method of the water-impervious treatment layer according to claim 6. In a water shielding work constituted by laying a large number of the water shielding sheets, in a portion where the end portions of the water shielding sheets are overlapped, an impermeable water shielding material component is sandwiched between the stacked water shielding sheets. By
The construction method of the water-impervious treatment layer according to claim 3, wherein the water-imperviousness of the water-impervious work is improved. At the edge of the periphery of the water shielding sheet, using another sheet piece attached as an overlapping sheet on the water shielding sheet body,
When overlapping the end portions of the water-impervious sheet provided with the overlap sheet, the sheet pieces are stacked in the same manner as the lower sheet body on top of each other.
The construction method for a water-impervious treatment layer according to claim 3 or 8, wherein the water-imperviousness is improved in the water-impervious work. In the impermeable construction that consists of laying a large number of the impermeable sheets,
When the end portions of the water-impervious sheet provided with the overlapping sheet are stacked, the sheet bodies are stacked on top of each other, and the sheet pieces are stacked in the same manner as the lower sheet body, and the water-impermeable impermeable water between the sheets. The construction method for a water-impervious treatment layer according to any one of claims 6 and 7, characterized in that the material component is interposed therebetween. In the impermeable construction constituted by laying a large number of the impermeable sheets, in the portion where the end portions of the impermeable sheets are overlapped, an impermeable impermeable material component is sandwiched between the superimposed impermeable sheets, and On the connection part, using means for connecting the water shielding sheets together,
The construction method for a water-impervious treatment layer according to claim 6, wherein the displacement of the water-impervious work is controlled and the strength is further improved. A connecting means for connecting the water-impervious sheet to the portion where the end portions of the water-impervious sheet are overlapped with each other, while overlapping the sheet and sandwiching the water-impermeable impermeable material between the sheet portions. In addition,
The construction method of the water-impervious treatment layer according to claim 9, wherein an additional water-impervious layer is constructed so as to cover the connection part.   With respect to the portion where the end portions of the water-impervious sheet are overlapped, a plurality of holes are provided in the overlap portion sheet, and the water-impermeable water-impervious material provided for the portion where the respective water-impervious sheets are overlapped, The construction method for a water-impervious treatment layer according to claim 10, wherein the layers of the water-impervious sheet are connected as a means for improving the water-impervious property. The portion of the water shielding sheet that overlaps the end portion of the water shielding sheet is positioned on the inner surface of the mold frame with respect to the leg members on both sides of the mold for the water shielding material that flows into the overlapping portion. Protruding the standing member on the upper surface,
The method for constructing a water-impervious treatment layer according to any one of claims 1 to 10, wherein the water-impermeable water-impervious material is poured in a state where the standing member is placed along the inner surface of the leg member of the formwork. The standing member provided to protrude from the upper surface of the end portion of the water-impervious sheet is configured as a sheet-like member extended greatly,
The method for constructing a water-impervious treatment layer according to claim 13, wherein an end portion of the sheet-like material is arranged so as to overlap with an inner surface of the mold, and a water-impervious material is poured into the mold. . A substantially gate-shaped formwork material having an opening on the lower surface is formed using a fiber or sheet-like material, and the leg members of the formwork are made of a sandbag-like shape having a square cross section,
The upper member arranged on the two leg members on both sides is composed of a sheet-like member,
16. The apparatus according to claim 1, further comprising a means for preventing the formwork member from being lifted in order to allow the impermeable water-impervious material to flow into the gate-shaped space of the formwork material. The construction method of the water-impervious treatment layer according to any one of the above.   2. The water-impervious water-impervious material is a water-impervious layer constructed of a material that can be constructed in the form of an asphalt layer, a concrete layer, a chemical layer, and a soil layer, and can exhibit water-impervious properties. The construction method of the water-impervious treatment layer in any one of thru | or 16.

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