JP2008279316A - Impervious structure at revetment of reclaimed area - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further surely prevent leakage of water of a reclaimed area to the outside through a revetment by further enhancing the impervious performance of the revetment surrounding the reclaimed area. <P>SOLUTION: The impervious structure at the revetment of the reclaimed area seals water between an impermeable flexible membrane 9 laid on a slope 8 formed in a part 4a of the revetment 4 surrounding the reclaimed area 3 and downward tilted toward the bottom of the reclaimed area 3, and a revetment structure 14 constituting other parts 4b of the revetment 4 and continuously formed at a part 4a of the revetment 4. An impermeable plate 16 is mounted on an inner wall face 15 of the side facing the reclaimed area 3. An edge part 25 on the revetment structure 14 side at the impermeable flexible membrane 9 is connected to the impermeable plate 16 side by an adhesive 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention provides a water-impervious structure at a revetment in a landfill area, which is designed to shield water between a water-impervious sheet laid on a part of the revetment surrounding the landfill area and a revetment structure constituting the other part of the revetment. It is about.

  Conventionally, the water-blocking structure in the revetment of the landfill area, such as the landfill site of waste, has been conventionally formed in a part of the revetment surrounding the landfill area and laid on an inclined surface inclined downward toward the bottom of the landfill area. There is a structure in which a water sheet and a concrete caisson that constitutes another part of the revetment and is connected to a part of the revetment are insulated.

  More specifically, a part of the revetment is made of a water-permeable material such as crushed stone or rubble, and the water-impervious sheet is laid to give water-imperviousness thereto. On the other hand, of the outer surface of the caisson, the edge portion on the caisson side of the water-impervious sheet is abutted or disposed close to the inner wall surface facing the landfill area. And the said edge part of a water-impervious sheet and the inner wall surface of the said caisson are mutually joined by the adhesive agent, and the water-impervious between the said water-impervious sheet and a caisson is performed.

Here, as shown in Patent Document 1 below, the landfill area is a waste landfill site or the like, and the caisson is an existing structure installed as a revetment at the outer edge of the landfill area.
JP 2006-204965 A

  By the way, the above conventional technique has the following problems. That is, as described above, since the caisson is made of concrete, many cracks that do not affect the structure of the casing tend to occur in the surface layer portion of the caisson.

  And if a crack occurs as described above, the sewage in the landfill area enters the crack and passes through it, thereby bonding the edge portion of the water shielding sheet and the caisson side. There is a risk of detouring the material and reaching the inside of part of the revetment. In this case, the water is disadvantageous in that it passes through the inside of a part of the revetment that is water-permeable as described above and leaks to the outside of the revetment.

  The present invention has been made paying attention to the above situation, and the object of the present invention is to further improve the water barrier of the revetment surrounding the landfill area, and the water in the landfill area permeates the revetment and It is to be able to more reliably prevent leakage to the outside.

  Another object of the present invention is to facilitate the formation of the revetment.

The invention of claim 1 includes a water-impervious sheet 9 formed on a part 4a of the revetment 4 surrounding the landfill area 3 and laid on an inclined surface 8 inclined downward toward the bottom of the landfill area 3, and the revetment 4 In the impermeable structure in the revetment of the landfill area, which constitutes the other part 4b and shields water between the revetment structure 14 connected to the part 4a of the revetment 4 above,
A water shielding plate 16 is attached to the inner wall surface 15 on the side facing the landfill area 3 of the outer surface of the revetment structure 14, and the edge 25 on the revetment structure 14 side of the water shielding sheet 9 is bonded. This is a water shielding structure in a revetment in a landfill area, which is connected to the water shielding plate 16 side by a material 11.

  According to the second aspect of the present invention, a thermoplastic connection sheet 26 made of resin is provided, and one end edge portion 27 of the connection sheet 26 is joined to the water shielding plate 16 by heat welding B, and the other end edge of the connection sheet 26 is provided. The block 28 and the end edge portion 25 of the water shielding sheet 9 are joined together by an adhesive 11 that enables adhesion in water W. Water structure.

  The invention of claim 3 is a strip shape extending along the inclined surface 8 when viewed in the longitudinal direction of the part 4a of the revetment 4 and the line of sight A along the inclined surface 8. The water-impervious structure for revetment in a landfill area according to claim 2, wherein both end edges in the width direction of the connecting sheet 26 are the one end and the other end edges 27, 28.

  The invention of claim 4 is characterized in that an anchor 36 protruding from the water shielding plate 16 and embedded in the adhesive 11 is provided, as particularly illustrated in FIG. It is the impermeable structure in the revetment of the landfill area as described in any one of these.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention of claim 1 comprises a water shielding sheet formed on a part of a revetment surrounding a landfill area and laid on an inclined surface inclined downward toward the bottom part of the landfill area, and the other part of the revetment. In the impermeable structure in the revetment of the landfill area, which is designed to impede water between the revetment structure connected to a part of the revetment,
Of the outer surface of the revetment structure, a water shielding plate is attached to the inner wall surface facing the landfill area, and the edge portion on the revetment structure side of the water shielding sheet is attached to the water shielding plate side with an adhesive. Is bound to.

  For this reason, even if a crack occurs in the surface layer portion of the inner wall surface of the revetment structure, the sewage in the landfill area enters the crack and passes through the crack. Is prevented. Therefore, when the water in the landfill area penetrates into and passes through the crack, it bypasses the adhesive that joins the edge of the water shielding sheet and the side of the revetment structure, so The inconvenience of reaching the inside of the section and leaking out of the revetment from here is prevented.

  According to a second aspect of the present invention, a thermoplastic connection sheet made of resin is provided, and one end edge portion of the connection sheet is bonded to the water shielding plate by thermal welding, and the other end edge portion of the connection sheet and the water shielding sheet are bonded. The above-mentioned end edge part is connected with an adhesive that enables adhesion in water.

  For this reason, firstly, the connection between the water shielding plate attached to the revetment structure and the connection sheet can be performed on the atmosphere side outside the landfill area, and therefore, the connection work between the water shielding plate and the connection sheet. Is easier than doing this underwater. And after these two members are joined, the revetment structure is installed at a predetermined position on the outer edge of the landfill area together with the two members, and the edge of the water shielding sheet and the other edge of the connecting sheet are connected. What is necessary is just to adhere each other.

  Second, since both the water shielding sheet and the connecting sheet have flexibility, the edge portion of the water shielding sheet and the other edge portion of the connecting sheet are each part in the longitudinal direction. In this case, it is possible to easily adhere each other at a predetermined equidistant distance by the adhesive material. Therefore, the bonding operation of the two members can be easily performed even if this operation is performed in the landfill area.

  As a result, the revetment formation work can be easily performed.

  The invention according to claim 3 is a belt-like shape extending along the inclined surface as viewed in the longitudinal direction of a part of the revetment and the line of sight along the inclined surface, and the width direction of the connecting sheet The both end edges are the one end and the other end.

  For this reason, since the said connection sheet was made into the simple strip | belt shape, while being able to perform the formation operation | work easily, the adhesion | attachment operation | work with the edge part of the said water shielding sheet can also be performed easily. Therefore, the work for forming the revetment can be made easier.

  According to a fourth aspect of the present invention, there is provided an anchor that protrudes from the water shielding plate and is embedded in the adhesive material.

  Here, the edge portion of the water-impervious sheet and the revetment structure may be separated from each other when the water-impervious sheet or the revetment structure receives some external force. In this case, there is a possibility that a crack may occur between the water shielding plate attached to the inner wall surface of the revetment structure and the adhesive in conjunction with the separation. And this reduces the sealing performance among the said water-impervious sheet | seat, an edge part, and a seawall structure, and is unpreferable.

  However, as described above, since the anchor protruding from the water shielding plate is embedded in the adhesive, the adhesive and the anchor are firmly bonded to each other. Therefore, as described above, even if the edge portion of the water-impervious sheet and the revetment structure try to separate somewhat from each other, cracks are prevented from occurring between the edge portion of the water-impervious sheet and the adhesive, The sealing performance remains good.

  Regarding the water-impervious structure at the revetment of the landfill area of the present invention, it is more reliable that the water-imperviousness of the revetment surrounding the landfill area is improved, and the water in the landfill area permeates the revetment and leaks to the outside. The best mode for carrying out the present invention in order to realize the object of enabling prevention is as follows.

  That is, the water-impervious structure at the revetment in the landfill area includes a water-impervious sheet formed on a part of the revetment surrounding the landfill area and laid on an inclined surface that is inclined downward toward the bottom of the landfill area. The water is shielded from the revetment structure that constitutes the part and is connected to a part of the revetment. Of the outer surface of the revetment structure, a water shielding plate is attached to the inner wall surface facing the landfill area. The edge part by the side of the said revetment structure in the said water shielding sheet is couple | bonded with the said water shielding board side with an adhesive agent.

  In order to describe the present invention in more detail, Example 1 will be described with reference to FIGS.

  1-3, the code | symbol 1 is a waste landfill in the coast.

  The land 2 of the landfill 1 is a landfill area 3 by dumping waste, and a revetment 4 extending along the outer edge of the landfill area 3 is provided so as to surround the landfill area 3. On the upper surface of the ground 2, a protective sheet 5, which is a water-impervious sheet made of resin (including rubber), is laid as a whole, and the upper surface side of the protective sheet 5 is the bottom 6 of the landfill area 3.

  A part 4a in the longitudinal direction of the revetment 4 is made of a water-permeable material such as crushed stone or rubble. A surface of the part 4 a of the revetment 4 facing the landfill area 3 is an inclined surface 8 that is inclined downward toward the bottom 6 of the landfill area 3. A water shielding sheet 9 is laid on the inclined surface 8 so as to entirely cover the inclined surface 8. This water shielding sheet 9 is made of a thermoplastic low density polyethylene resin and has flexibility. The water shielding sheet 9 has a softening point of approximately 110 ° C. and a melting start point of approximately 200 ° C. The water shielding sheet 9 may be made of a resin such as high density polyethylene or vinyl chloride.

  A lower edge 10 of the water shielding sheet 9 on the bottom 6 side of the landfill area 3 is bonded to the upper surface of the protective sheet 5 by an adhesive 11. The adhesive material 11 is a thermoplastic water shielding material and is called asphalt mastic. The adhesive 11 is in a heat-melted state having a large viscosity at 160 ± 20 ° C. The bonding work by the adhesive material 11 is achieved by a cover body 12 made of sheet metal that covers or surrounds the adhesion site, and the adhesive material 11 that flows into the cover body 12 in the hot-melt state. Bonding work is also possible in water W.

  For convenience of explanation, in the illustrated example, the adhesive 11 is interposed only between the upper surface of the protective sheet 5 and the lower edge 10 of the water shielding sheet 9. However, in practice, the adhesive 11 is filled in a range covered or surrounded by the cover body 12, and adhesion and sealing by the adhesive 11 are more reliably achieved. Yes. Also, the adhesive 11 described below has the same structure as described above.

  The other part 4b of the revetment 4 is connected to the end of part 4a of the revetment 4 so as to be substantially orthogonal, and a plurality of revetment structures are arranged along the outer edge of the landfill area 3. 14 and a water shielding plate 16 attached to the inner wall surface 15 so as to entirely cover the inner wall surface 15 on the side facing the landfill area 3 among the outer surfaces of the revetment structures 14.

  Each of the revetment structures 14 is a concrete caisson, and is a pre-made hollow structure. The revetment structures 14 have a rectangular parallelepiped shape and are the same shape and size. On the other hand, the water shielding plate 16 covers the inner wall surface 15 of each revetment structure 14 as a whole and is provided so as to be in surface contact with the inner wall surface 15, and the water shielding plate body 17. A plurality of fixing protrusions 18 that protrude integrally from the back surface and are embedded and fixed inside the inner wall surface 15 are provided. The water shielding plate 16 is made of a thermoplastic resin.

  The revetment structures 14 and the water shielding plates 16 are filled in the gaps 21 between the revetment structures 14 adjacent to each other and between the water shielding plate bodies 17 of the water shielding plates 16 in the arrangement direction. They are connected to each other by an adhesive 11. Moreover, the lower end edge part of each said water shielding board 16 and the said protective sheet 5 which opposes these are mutually connected by the adhesive material 11 with which the clearance gap 22 between these was filled.

  The edge 25 on the revetment structure 14 side of the water shielding sheet 9 is almost entirely covered with the surface of the water shielding plate body 17 of the water shielding plate 16 by the adhesive 11 that can be bonded in the water W described above. Is connected to the side.

  More specifically, a band-shaped connecting sheet 26 extending along the inclined surface 8 is provided as viewed in the longitudinal direction of the part 4a of the revetment 4 and the line of sight A along the inclined surface 8. The connecting sheet 26 is made of the same material as the water shielding sheet 9. The one end edge 27 in the width direction of the connecting sheet 26 is joined to the surface of the water shielding plate body 17 of the water shielding plate 16 by thermal welding B. The bonding by the thermal welding B is performed on the atmosphere side before the revetment structure 14 is installed at a predetermined position on the outer edge of the landfill area 3. The water shielding sheet 9 and the connecting sheet 26 may be made of different materials.

  Further, the end edge 25 of the water-impervious sheet 9 and the other end edge 28 of the connecting sheet 26 are coupled to each other by the bonding work by the adhesive 11 in the water W of the landfill area 3. Yes.

  Further, a landfill material 31 which is the same material as or a different material from the part 4 a of the revetment 4 is laminated on the upper surfaces of the water shielding sheet 9 and the connecting sheet 26. The landfill 31 is also provided with another inclined surface that is substantially the same as the inclined surface 8. On this other inclined surface, another water-impervious sheet 32 having the same structure as the water-impervious sheet 9 is laid, and the other water-impervious sheet 32 is also formed by another connecting sheet 33 having the same structure as the connecting sheet 26. The water shielding plate 16 is coupled to the surface side of the water shielding plate main body 17.

  According to the said structure, the water-blocking board 16 is attached to the inner wall surface 15 by the side facing the said landfill area 3 among the outer surfaces of the revetment structure 14, and the edge by the side of the said revetment structure 14 in the said water-impervious sheet 9 The portion 25 is coupled to the water shielding plate 16 side by the adhesive 11.

  For this reason, even if a crack occurs in the surface layer portion of the inner wall surface 15 of the revetment structure 14, the fact that the sewage W in the landfill area 3 enters and passes through such a crack is described above. This is prevented by the water shielding plate 16. Therefore, the water W in the landfill area 3 enters the crack and passes therethrough, thereby bypassing the adhesive 11 that joins the edge 25 of the water shielding sheet 9 and the revetment structure 14 side. Thus, it is possible to prevent the inconvenience of reaching the inside of the part 4a of the revetment 4 and leaking out of the revetment 4 from here.

  Further, as described above, the thermoplastic connection sheet 26 made of resin is provided, and one end edge 27 of the connection sheet 26 is joined to the water shielding plate 16 by thermal welding B, and the other end edge of the connection sheet 26 is obtained. The portion 28 and the end edge portion 25 of the water-impervious sheet 9 are joined together by an adhesive 11 that enables adhesion in water W.

  For this reason, first, the connection between the water shielding plate 16 attached to the revetment structure 14 and the connection sheet 26 can be performed on the atmosphere side outside the landfill area 3, and thus the connection with the water shielding plate 16 is possible. The connecting operation with the sheet 26 can be easily performed as compared with the operation in the water W. And after joining these both members 16 and 26, the said revetment structure 14 is installed in the predetermined position of the outer edge part of the said landfill area 3 with the said both members 16 and 26, and the edge part 25 of the said water shielding sheet 9 is provided. And the other end edge portion 28 of the connecting sheet 26 may be bonded to each other. In this case, each of the revetment structures 14 is filled with water W, stones or the like.

  Second, since both the water shielding sheet 9 and the connection sheet 26 have flexibility, the edge 25 of the water shielding sheet 9 and the other edge 28 of the connection sheet 26 are different from each other. Further, it is possible to easily bond the respective parts in the longitudinal direction with the adhesive 11 at a predetermined equal distance from each other. Therefore, even if this operation | work of the said members 9 and 26 is performed in the water of the landfill area 3, it can be done easily.

  As a result, the revetment 4 can be easily formed.

  Further, as described above, the connecting sheet 26 is formed in a band shape extending along the inclined surface 8 when viewed in the longitudinal direction of the part 4a of the revetment 4 and the line of sight A along the inclined surface 8. Both end edges in the width direction of the connecting sheet 26 are the one end and the other end edges 27 and 28.

  For this reason, since the connecting sheet 26 has a simple band shape, the forming operation can be easily performed, and the bonding operation with the edge 25 of the water shielding sheet 9 can be easily performed. Therefore, the work for forming the revetment 4 can be made easier.

  In addition, although the above is based on the example of illustration, the said protection sheet 5 and the water-impervious sheet 9 may be an integral sheet. The protective sheet 5 may not be provided. In this case, the ground 2 may be the original ground, or cement or the like may be mixed and solidified on the surface layer portion to form an impermeable ground. Moreover, as above-mentioned, when not providing the protective sheet 5, the lower end edge part 10 and the seawall structure 14 of the water-impervious sheet 9 are installed so that it may contact | adhere directly to the upper surface of the ground 2.

  Further, the revetment structure 14 may be made of solid concrete, or may be made of metal in which an iron plate or a steel frame is combined. Further, the water shielding plate body 17 of the water shielding plate 16 may be attached only to a part of the inner wall surface 15 of the revetment structure 14 corresponding to the edge 25 of the water shielding sheet 9. Further, the landfill material 31, the other water-impervious sheet 32, and the other connecting sheet 33 may be omitted.

  FIG. 4 below shows a second embodiment. The second embodiment is common in many respects to the configuration and operational effects of the first embodiment. Therefore, regarding these common items, common reference numerals are attached to the drawings, and redundant description thereof is omitted, and different points are mainly described. In addition, the configuration of each part in these embodiments may be variously combined in light of the object and operational effects of the present invention.

  In order to describe the present invention in more detail, Example 2 will be described with reference to FIG.

  In FIG. 4, the edge portion 25 of the water shielding sheet 9 is directly bonded to the surface of the water shielding plate body 17 of the water shielding plate 16 by the adhesive 11 without using the connecting sheet 26. In this case, one end is joined to the surface of the water shielding plate main body 17 of the water shielding plate 16 by thermal welding or adhesion, and the other end protrudes outward from the surface of the water shielding plate main body 17. Is provided. The anchor 36 includes a base plate 37 that is coupled in surface contact with the surface of the water shielding plate main body 17 and a hook portion 38 that integrally projects from the base plate 37. At least the hook portion 38 of the anchor 36 is embedded in the adhesive material 11.

  According to the above configuration, the anchor 36 that protrudes from the water shielding plate 16 and is embedded in the adhesive 11 is provided.

  Here, the edge portion 25 of the water-impervious sheet 9 and the revetment structure 14 may be separated from each other when the water-impervious sheet 9 and the revetment structure 14 receive some external force. In this case, there is a possibility that a crack may occur between the water shielding plate 16 attached to the inner wall surface 15 of the revetment structure 14 and the adhesive 11 in conjunction with the separation. And this reduces the sealing performance between the said water-impervious sheet 9, the edge part 25, and the seawall structure 14, and is unpreferable.

  However, as described above, since the anchor 36 protruding from the water shielding plate 16 is embedded in the adhesive material 11, the adhesive material 11 and the anchor 36 are firmly bonded to each other. Therefore, as described above, even if the end edge portion 25 of the water-impervious sheet 9 and the revetment structure 14 try to separate somewhat from each other, a crack occurs between the end edge portion 25 of the water-impervious sheet 9 and the adhesive 11. This is prevented and the sealing performance remains good.

1 is a partial perspective view of a landfill showing Example 1. FIG. 1 is a partial side sectional view of a landfill showing Example 1. FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 9 is a cross-sectional view of a joint portion between the edge portion of the water-impervious sheet and the revetment structure according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Landfill 2 Ground 3 Reclamation area 4 Revetment 4a Part 4b Other part 5 Protection sheet 6 Bottom part 8 Inclined surface 9 Water shielding sheet 10 Lower edge 11 Adhesive material 14 Seawall structure 15 Inner wall 16 Water shielding board 17 Water shielding board Main body 18 Fixing protrusion 25 End edge portion 26 Connecting sheet 27 One end edge portion 28 Other end edge portion 36 Anchor 37 Base plate 38 Hook portion A Line of sight B Thermal welding W Water

Claims (4)

A water shielding sheet that is formed on a part of the revetment that surrounds the landfill area and is laid on an inclined surface that tilts downward toward the bottom of the landfill area, and is connected to a part of the revetment that forms the other part of the revetment In the impermeable structure at the revetment in the landfill area, which is designed to impede water between the revetment structure
Of the outer surface of the revetment structure, a water shielding plate is attached to the inner wall surface facing the landfill area, and the edge portion on the revetment structure side of the water shielding sheet is attached to the water shielding plate side with an adhesive. Impervious structure at revetment in landfill area characterized by being combined with   A thermoplastic connection sheet made of resin is provided, and one end edge of the connection sheet is bonded to the water shielding plate by thermal welding, and the other end edge of the connection sheet and the end edge of the water shielding sheet are connected. The water-impervious structure at a revetment in a landfill area according to claim 1, which is bonded by an adhesive that enables bonding in water.   The connecting sheet is formed in a strip shape extending along the inclined surface when viewed in a longitudinal direction of a part of the revetment and along the inclined surface, and both end edges in the width direction of the connecting sheet are the one end. The water-impervious structure at a revetment in a landfill area according to claim 2, wherein the other end edge is used.   The water-impervious structure at a revetment in a landfill area according to any one of claims 1 to 3, wherein an anchor that protrudes from the water-impervious plate and is embedded in the adhesive is provided.

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