JP6527477B2 - Communication tube unit, water blocking structure, and water blocking method - Google Patents

Description

  The present invention relates to a communicating pipe unit used for a water shielding structure such as a waste disposal site, and to a water shielding structure and a water shielding construction method using the communicating pipe unit.

  For example, in a waste disposal site for landfilling waste, a control pond or reservoir for storing water and rainwater from a river, a water blocking sheet is laid on the entire surface, and a communicating pipe connecting the inside and the outside is used. Water is discharged to the outside or flows from the outside.

  In the conventional waste disposal site, a collection and drainage pipe for discharging the accumulated water to the outside is provided as the above-mentioned communication pipe in a state where a part is buried in the wall of the disposal site. A water blocking sheet is bonded to the outer peripheral surface of the water collecting and draining pipe by an adhesive. However, it is difficult to join the water-impervious sheet to the water collection and drainage pipe partially embedded in the wall of the waste disposal site. Moreover, it is difficult to firmly bond the water collecting and draining pipe made of polyethylene and the water blocking sheet made of soft resin or rubber with an adhesive in terms of the material, and the water tightness of the joint is sufficiently It was difficult to secure.

  So, in patent document 1, it joins in the state which penetrated the water-impervious sheet to the water collecting and draining pipe beforehand, and inserts this in the hole of the water blocking sheet with a port-like hole previously installed in the waste disposal site, The impermeable sheet and the impermeable sheet piece are welded. If it explains more concretely, the portion in which a water collection pipe is inserted is formed cylindrically as a water blocking sheet piece. Moreover, in order to improve the adhesiveness of the adhesive, a primer is applied to the outer peripheral surface of the water collection and drainage pipe and the inner peripheral surface of the cylindrical portion of the water blocking sheet in advance, and heat treatment is performed. An adhesive is interposed to join the water collection and drainage pipe and the water sealing piece.

Patent No. 4395235 gazette

However, in Patent Document 1 described above, it is necessary to form a water shielding sheet piece of a special shape, and additionally, the water collecting and draining pipe and the water shielding sheet piece must be coated with a primer and heated, respectively. It takes time and effort.
Moreover, although the primer is used in patent document 1 in order to improve the adhesiveness of an adhesive agent, the watertightness of a junction may still be inadequate.
The problems as described above occur not only in the water shielding structure of the waste disposal site but also in the water shielding structure of the adjustment pond and the reservoir.

  Then, an object of the present invention is to provide a communicating pipe unit having high watertightness of a joint and which can be easily formed, and a water blocking structure and a water blocking construction method using the communication pipe unit.

Means for Solving the Problems and Effects of the Invention

The communication pipe unit of the first invention is used in a water shielding structure in which a water shielding sheet is laid on the side and bottom of a recess formed on the ground, and the inside and the outside of the recess are communicated by the communication tube. A single water-impervious plate made of a thermoplastic resin which is flat and is higher in rigidity than the water-impervious sheet and disposed to form a part of the side surface of the recess, and the water-impervious plate The connecting pipe made of thermoplastic resin is embedded in the side wall portion of the recess so as to penetrate the through hole and expose one end thereof in the recess, and is formed of a fusion material made of thermoplastic resin, have a, a joining portion for joining the outer peripheral surface of the edge portion and the communicating tube of the through-hole of said water shield plates over the entire circumference, the water shield plates, to form a part of the side surface of the recess And the communication pipe is provided obliquely with respect to the communication pipe, and the communication pipe is There is distance from the bottom, characterized a portion protruding the shield from the water plate inwardly of said recess, so as to be embedded in the side wall portion, the Rukoto such and a portion protruding from impermeable plate outwardly of the recess I assume.

According to this configuration, the communication pipe is penetrated through the through hole of the water shielding plate, and the edge of the through hole of the water shielding plate and the outer peripheral surface of the communication pipe are joined by the fusion material made of thermoplastic resin. The communicating pipe unit of the present invention can be formed. In the water blocking structure, the water blocking plate is arranged to form a part of the side surface of the recess formed on the ground, and the communicating pipe is embedded in the sidewall of the recess such that one end is exposed in the recess Ru.
The water blocking plate and communicating pipe formed of a thermoplastic resin are joined by a fusion material made of a thermoplastic resin. Since a primer etc. are unnecessary for joining, joining operation can be performed easily. Moreover, compared with the case where it joins using an adhesive agent and a primer, the joint strength of a junction part can be raised and, thereby, the water tightness of a junction part can be improved.
In addition, since the water blocking plate is higher in rigidity than the water blocking sheet, the work of joining the water blocking plate and the communicating pipe can be performed more easily than in the case of bonding the water blocking sheet and the communicating pipe. Moreover, since the water blocking plate is flat, it is easy to form the water blocking plate.
As described above, the communication pipe unit of the present invention can be easily formed, and the water tightness of the joint is high.

  In the communicating pipe unit according to the first aspect of the present invention, it is preferable that the communicating pipe, the water blocking plate, and the joint portion be formed of the same thermoplastic resin. According to this configuration, the joint strength of the joint can be further enhanced, and the water tightness of the joint can be further improved.

  In the communicating pipe unit according to the first aspect of the present invention, it is preferable that the communicating pipe, the water blocking plate, and the joint portion be formed of polyethylene. According to this configuration, the durability of the communicating pipe, the water blocking plate, and the joint portion can be improved.

The water blocking structure of the second invention is a water blocking structure in which a water blocking sheet is laid on the side surface and the bottom surface of a recess formed on the ground, and the inside and the outside of the recess are communicated with each other by a communicating pipe. It has a flat plate shape, is higher in rigidity than the water blocking sheet, and penetrates the one water blocking plate made of thermoplastic resin forming a part of the side surface of the recess, and the through hole of the water blocking plate The communication pipe made of a thermoplastic resin embedded in the side wall of the recess so that one end is exposed in the recess, and a fusion material made of a thermoplastic resin; A joint that joins the edge of the through hole and the outer peripheral surface of the communicating pipe over the entire circumference, and an inward facing surface of the recess of the water blocking plate, and is bonded over the entire circumference around the through hole that said possess a water shield sheet, and the water shield plates, the side surface of the recess A portion which is provided obliquely with respect to the communication pipe so as to form a portion, the communication pipe being spaced from the bottom of the recess and protruding in the inward direction of the recess from the water blocking plate, and the side wall to be embedded in the section, shielding, characterized in Rukoto such from the water plate and outward to protrude the portion of the recess.

According to this configuration, the edge of the through hole of the water blocking plate and the outer peripheral surface of the communicating tube are joined by the fusion material made of thermoplastic resin in a state where the communicating tube penetrates the through hole of the water blocking plate . The water blocking plate is arranged to form a part of the side surface of the recess formed in the ground, and the communicating pipe is embedded in the side wall portion of the recess so that one end thereof is exposed in the recess. The water-impervious sheet is joined along the entire circumference of the through-hole of the water-impervious plate, and laid on the side and bottom of the recess.
The water blocking plate and communicating pipe formed of a thermoplastic resin are joined by a fusion material made of a thermoplastic resin. Since a primer etc. are unnecessary for joining, joining operation can be performed easily. Moreover, compared with the case where it joins using an adhesive agent and a primer, the joint strength of a junction part can be raised and, thereby, the water tightness of a junction part can be improved.
In addition, since the water blocking plate is higher in rigidity than the water blocking sheet, the work of joining the water blocking plate and the communicating pipe can be performed more easily than in the case of bonding the water blocking sheet and the communicating pipe. Moreover, since the water blocking plate is flat, it is easy to form the water blocking plate.
As described above, in the water-impervious structure of the present invention, the communication pipe and the water-impervious plate can be easily joined, and the water tightness of the joint is high.

The water blocking method of the third invention is a water blocking method in which a water blocking sheet is laid on the side surface and the bottom surface of a recess formed on the ground to form a water blocking structure in which the inside and the outside of the recess are communicated by a communicating pipe. The communication pipe made of thermoplastic resin is made to penetrate through a through hole formed in one water impermeable plate made of thermoplastic resin, which is flat and has higher rigidity than the water shielding sheet. A bonding step of bonding an edge portion of the through hole of the water blocking plate and an outer peripheral surface of the communicating pipe over the entire periphery using a fusion material made of a melted thermoplastic resin, and a part of the side surface of the recess A side wall portion forming step of forming a side wall portion of the recess and a side wall portion forming step in a state where the water blocking plate joined to the communicating pipe in the joining step is disposed at the position; An inward facing surface of the recess of the plate, around the through hole, With joining the water shield sheet I, have a, a water shield sheet laying step for laying the water-impervious sheet on the side surface and the bottom surface of the recess, in the bonding step, the water shield plate, said recess A portion which is provided obliquely with respect to the communication pipe so as to form a part of a side surface, the communication pipe being spaced from the bottom of the recess and projecting inward of the recess from the water blocking plate , so as to be embedded in the side wall portion is provided from the water shield plate to consist of an outer direction protruding portion of said recess and said Rukoto.

According to this configuration, in the bonding step, the communication pipe is made to penetrate the through hole of the water shielding plate, and the edge portion of the through hole of the water shielding plate and the outer peripheral surface of the communication pipe are bonded by the fusion material made of thermoplastic resin. Do. Then, the side wall part of a recessed part is formed in the state which arrange | positioned the water blocking board joined to the communicating pipe by the joining process in the position which becomes a part of side surface of a recessed part. Then, in the impermeable sheet laying step, the impermeable sheet is joined around the through hole on the surface of the impermeable plate, and the impermeable sheet is laid on the side surface and the bottom of the recess.
The water blocking plate and communicating pipe formed of a thermoplastic resin are joined by a fusion material made of a thermoplastic resin. Since a primer etc. are unnecessary for joining, joining operation can be performed easily. Moreover, compared with the case where it joins using an adhesive agent and a primer, the joint strength of a junction part can be raised and, thereby, the water tightness of a junction part can be improved.
In addition, since the water blocking plate is higher in rigidity than the water blocking sheet, the work of joining the water blocking plate and the communicating pipe can be performed more easily than in the case of bonding the water blocking sheet and the communicating pipe. Moreover, since the water blocking plate is flat, it is easy to form the water blocking plate.
As described above, in the water blocking method of the present invention, the communication pipe and the water blocking plate can be easily joined, and the water tightness of the joint is high.

  In the water blocking method according to the third aspect of the present invention, an outer mold is installed at a position where the side wall of the recess is formed before the side wall forming step, and a predetermined distance is provided from the outer mold. Performing the mold setting step of setting the inner mold and the water blocking plate joined to the communicating pipe in the bonding step, and in the side wall portion forming step, the outer mold and the inner mold It is preferable to remove the outer form and the inner form after pouring concrete into the space between the plate and the water blocking plate and solidifying the concrete.

According to this configuration, the water blocking plate and the inner mold are joined to the communicating pipe at a predetermined distance from the outer mold, and a part of the communicating pipe is divided into the outer mold and the inner mold. In the state of being disposed between, concrete is cast to form a side wall portion of the recess. Thus, in order to form the side wall portion of the recess in the state where the communication pipe is installed, the work process is simplified compared to the case where the communication pipe is installed on the side wall after forming the side wall portion of the recess with concrete. it can.
In addition, since the communicating pipe and the water blocking plate can be firmly fixed to the recess by forming the side wall portion of the recess in the state where the communicating tube and the water blocking plate are installed, the durability and the water blocking of the water blocking structure are improved. it can.

It is a sectional view of a waste disposal site concerning an embodiment of the present invention. FIG. 2 is an enlarged view of the periphery of the water collection and drainage pipe unit of FIG. It is the figure seen from the right side of FIG. 2, Comprising: It is the figure which abbreviate | omitted illustration of the upper-layer protection mat. It is a sectional view of a drainage pipe unit. It is sectional drawing which shows the state in the middle of construction of the waste disposal site of FIG. It is sectional drawing of the periphery of the water collection and drainage pipe unit in the waste disposal site which concerns on other embodiment of this invention. It is the figure seen from the right side of FIG.

Hereinafter, embodiments of the present invention will be described.
The present embodiment is an example in which the present invention is applied to the water blocking structure of a waste disposal site.
As shown in FIG. 1, the water blocking structure 1 of the waste disposal site has a water blocking portion 4 laid on the side surface 2 a and the bottom surface 2 b of the recess 2 formed on the ground, and a water collection and drainage pipe unit 3. Most of the recess 2 is made of concrete.

  As shown in FIG. 2 and FIG. 4, the water collection and drainage pipe unit 3 is configured of a water collection and drainage pipe 10, a water shielding plate 11, and a joint portion 12 for bonding the water collection and drainage pipe 10 and the water shielding plate 11.

  As shown in FIG. 2, the water collection and drainage pipe 10 is embedded in the side wall portion of the recess 2 so that one end thereof is exposed in the recess 2. Water accumulated in the recess 2 is discharged from the water collection and drain pipe 10 to the outside. As shown in FIG. 3, the water collection and drainage pipe 10 is a circular pipe. The water collection pipe 10 is disposed in the vicinity of the bottom surface 2 b of the recess 2. As shown in FIG. 1, the end of the water collection and drainage pipe 10 exposed to the inside of the recess 2 is connected to a perforated water collection and drainage pipe 5 having a plurality of holes formed on its side surface. Although illustration is omitted, the periphery of the perforated drainage pipe 5 is covered with crushed stone or stone. As shown in FIG. 1, a drainage pipe 6 is connected to the other end of the water collection and drainage pipe 10, and the drainage pipe 6 extends to a sewage treatment facility provided outside the waste disposal site.

  The water collection and drainage pipe 10 is formed of a thermoplastic resin. Although it is preferable to use polyethylene pipe excellent in pressure resistance, the water collection pipe 10 is not limited to this. The water collection pipe 10 may be made of, for example, polyvinyl chloride resin. The diameter and length of the water collection pipe 10 are appropriately set according to the waste disposal site.

  The water blocking plate 11 is a flat plate member having a circular through hole 11 a. A water collection and drainage pipe 10 penetrates through the through hole 11 a of the water blocking plate 11. The water blocking plate 11 is arranged to form a part of the side surface 2 a of the recess 2. In the present embodiment, the lower end of the water blocking plate 11 reaches the bottom surface 2 b of the recess 2, but the lower end of the water blocking plate 11 may be located above the bottom surface 2 b of the recess 2. Moreover, in this embodiment, although the water blocking board 11 is formed in square (refer FIG. 3), the shape of the water blocking board 11 is not limited to this. The size of the water blocking plate 11 is appropriately set in accordance with the diameter of the water collection pipe 10. As an example, when the diameter of the water collection pipe 10 is 300 mm, the length of one side of the square water blocking plate 11 may be 400 to 900 mm.

  The water blocking plate 11 is formed of a thermoplastic resin. The water blocking plate 11 is preferably formed of the same thermoplastic resin as the water collection and drainage pipe 10, but is not limited thereto. The water blocking plate 11 is preferably made of polyethylene. The water blocking plate 11 is higher in rigidity than the water blocking sheets 20 and 21 described later. The plate thickness of the water blocking plate 11 is, for example, about 20 to 50 mm.

  The joint portion 12 joins the edge portion of the through hole 11 a of the water blocking plate 11 and the outer peripheral surface of the water collection pipe 10 along the entire circumference. The joint portions 12 are formed on both sides of the water impermeable plate 11. The bonding portion 12 is formed of a fusion material of a thermoplastic resin. In order to increase the bonding strength of the bonding portion 12, the thermoplastic resin forming the bonding portion 12 is preferably the same as the thermoplastic resin forming at least one of the water collecting and draining pipe 10 and the water blocking plate 11. More preferably, the water collecting and draining pipe 10, the water blocking plate 11, and the joint 12 are formed of the same thermoplastic resin.

  Next, the water blocking unit 4 will be described. As shown in FIG. 2, the water blocking unit 4 is configured of an upper layer water blocking sheet 20, a lower layer water blocking sheet 21, an upper layer protective mat 22, an intermediate layer protective mat 23, and a lower layer protective mat 24. The water blocking sheets 20 and 21 and the protection mats 22, 23 and 24 have flexibility. The protective mats 22 to 24 are provided to protect the water blocking sheets 20 and 21. In FIG. 3, the upper layer protection mat 22 and the band 27 described later are not shown.

  The lower layer protection mat 24, the lower layer water impermeable sheet 21, the middle layer protective mat 23, the upper layer water impermeable sheet 20, and the upper layer protection on portions other than the peripheral portion of the through hole 11 a of the side surface 2 a of the depressed portion 2. The mats 22 are stacked in this order. The lower layer water impermeable sheet 21 and the upper layer water impermeable sheet 20 respectively correspond to the water impermeable sheet of the present invention. The lower layer water impermeable sheet 21, the upper layer water impermeable sheet 20, and the upper layer protective mat 22 are laminated on the surface of the water impermeable plate 11 below the through holes 11 a, but the lower layer protective mat 24 and the middle layer protective mat 23 Is not placed.

  The upper layer water blocking sheet 20 and the lower layer water blocking sheet 21 are formed with rectangular holes through which the water collection and drainage pipe 10 is inserted, and the edge portions of the holes are respectively joined to the surface of the water blocking plate 11 25 and 26 are joined. The bonding portions 25 and 26 are formed all around the through hole 11 a on the surface of the water blocking plate 11. The joint portions 25 and 26 are formed in a rectangular shape (see FIG. 3). The bonding portion 25 for bonding the upper water blocking sheet 20 and the water blocking plate 11 is formed inside the bonding portion 26 for bonding the lower water blocking sheet 21 and the water blocking plate 11. The bonding portions 25 and 26 are formed of, for example, a fusion material made of a thermoplastic resin such as polyethylene. In order to increase the bonding strength between the bonding portions 25 and 26 and the water blocking plate 11, the thermoplastic resin forming the bonding portions 25 and 26 is preferably the same as the thermoplastic resin forming the water blocking plate 11.

  The upper layer protection mat 22 is disposed on the entire surface of the recess 2 and fixed to the water collection and drainage pipe 10 by a band 27 attached to the outer peripheral surface of the water collection and drainage pipe 10. The lower layer protection mat 24 is fixed to the recess 2 by a fixing tool (not shown) embedded in the recess 2. Adjacent protective mats and water impermeable sheets (for example, upper layer protective mat 22 and upper layer water impermeable sheet 20) are joined by a fusion material or the like. The lower layer water impermeable sheet 21 and the upper layer water impermeable sheet 20 may be joined together by a fusion material or the like by providing the through holes 11 a in the middle layer protective mat 23.

  The water-impervious sheets 20 and 21 are formed of rubber or thermoplastic resin that can be fused with the thermoplastic resin that constitutes the bonding portions 25 and 26. Specifically, for example, EPDM (ethylene propylene rubber), HDPE (high density polyethylene), LDPE (low density polyethylene), VLDPE (ultra low density polyethylene), LLDPE (linear low density polyethylene), PP (polypropylene) , TPE (thermoplastic elastomer), etc. are used. The thickness of the water blocking sheets 20 and 21 is, for example, about 0.5 to 3.0 mm.

  The protective mats 22 to 24 are made of, for example, a synthetic resin such as polyester, acrylic, polypropylene or polyethylene. The form of the protective mats 22 to 24 is a non-woven fabric, a woven fabric, a foam, a bonding material of non-woven fabric and a resin sheet, a bonding material of non-woven fabric and a foam, or a bonding material of a foam and a resin sheet. The thickness of the protective mats 22 to 24 is, for example, about 3 to 20 mm. It is thicker than the thickness of the water blocking sheet 20, 21.

  Hereinafter, the water blocking method for forming the water blocking structure 1 of the waste disposal site will be described.

  First, the drainage pipe unit 3 is created at a place other than the construction site of the waste disposal site such as a factory or a work place. Specifically, first, the water collection and drainage pipe 10 is inserted into the through hole 11 a formed in the water blocking plate 11 and temporarily fixed at a predetermined position. Then, a fusion material obtained by extruding the melted thermoplastic resin in a rod shape by a heating extruder (not shown) is disposed along the edge of the through hole 11a. The bonding material 12 is cooled and solidified to form the bonding portion 12, and the water blocking plate 11 and the water collection and drainage pipe 10 are bonded. The process of producing the water collection and drainage pipe unit 3 corresponds to the bonding process of the present invention.

  Subsequently, the water tightness (water impermeability) of the joint 12 is inspected for the water collection and drainage pipe unit 3. Then, the drainage and drainage pipe unit 3 that has passed the watertightness inspection is brought to the site of the waste disposal site. In addition, an example of a water tightness test is given below. Before joining the water collection pipe 10 and the water blocking plate 11, an electrode (such as a wire) is disposed on the surface of the water collection pipe 10 in advance. Then, after the water collecting and draining pipe 10 and the water blocking plate 11 are joined, a high voltage is applied to the surface of the joint 12 (for example, the surface of the joint 12 is stroked with a brush applied with a high voltage). The electrode in the bonding portion 12 is energized to detect a portion where a spark is generated as a defect (pinhole) of the bonding portion 12. If there is a defect, it is determined that there is a problem in water tightness.

  At the construction site of the waste disposal site, as shown in FIG. 5, the bottom 31 of concrete is formed on the bottom of the depression 30 formed on the ground. The upper surface of the bottom 31 is the bottom 2 b of the recess 2. An outer form 32 is placed on the bottom 31 along the side of the recess 30. The reinforcing bars 33 are installed on the side opposite to the side surface of the depression 30 of the outer formwork 32. Subsequently, the inner formwork 34 is installed so as to sandwich the reinforcing bar 33 with the outer formwork 32. Further, the water collection and drainage pipe unit 3 is installed on the side opposite to the side surface of the depression 30 of the outer form 32. The water blocking plate 11 and the inner formwork 34 of the water collection and drainage pipe unit 3 are disposed at a position spaced apart from the outer formwork 32 by a predetermined distance. More specifically, the surface of the water blocking plate 11 opposite to the outer mold 32 is disposed on the same plane as the surface of the inner mold 34 facing the outer mold 32.

  Next, concrete is poured between the outer form 32 and the inner form 34 and the water blocking plate 11. After the concrete is solidified to form the concrete wall (the side wall portion of the recess 2), the outer form 32 and the inner form 34 are removed, and the soil is backfilled on the back of the concrete wall.

  Thereafter, the water blocking portion 4 is laid on the side surface 2 a and the bottom surface 2 b of the recess 2. At this time, the water collection and drainage pipe 10 is inserted into the rectangular hole formed in the lower layer water shielding sheet 21, and the edge of the hole of the lower layer water shielding sheet 21 is joined to the surface of the water shielding plate 11. Specifically, as in the case of bonding the water blocking plate 11 and the water collection pipe 10, the water blocking plate is obtained by extruding a melted thermoplastic resin into a rod shape by a heating extruder (not shown). It arrange | positions along the edge of the hole of the lower layer water-permeable sheet 21 temporarily fixed to the surface of 11. As shown in FIG. The bonding portion 26 is formed by cooling and solidifying the fusion material. Thereafter, the upper impermeable sheet 20 is joined to the surface of the impermeable plate 11 in the same procedure. Thus, the construction of the water blocking structure 1 is completed.

In the water collection and drainage pipe unit 3 of the present embodiment, the water blocking plate 11 and the water collection and drainage pipe 10 formed of a thermoplastic resin are fusion-bonded by a fusion material made of a thermoplastic resin. Since a primer etc. are unnecessary for joining, joining operation can be performed easily. Moreover, compared with the case where it joins using an adhesive agent and a primer, the joint strength of the junction part 12 can be raised, and, thereby, the water tightness of the junction part 12 can be improved.
Further, since the water blocking plate 11 is higher in rigidity than the water blocking sheets 20 and 21, the water blocking plate 11 and the water collecting and draining pipe 10 are compared with the case where the water blocking sheets 20 and 21 and the water collecting and draining pipe 10 are joined. It is easy to do the work of joining the Moreover, since the water blocking plate 11 is flat, it is easy to form the water blocking plate 11.
As described above, the water collection and drainage pipe unit 3 of the present embodiment can be easily formed, and the water tightness of the joint 12 is high.

  When the water collecting and draining pipe 10, the water blocking plate 11, and the joint 12 are formed of the same thermoplastic resin, the joint strength of the joint 12 is further enhanced, and the water tightness of the joint 12 is further improved. be able to. Moreover, when the water collecting pipe 10, the water shielding plate 11, and the junction part 12 are formed with polyethylene, durability of the water collecting pipe 10, the water shielding plate 11, and the junction part 12 can be improved.

In the water blocking method according to the present embodiment, the water blocking plate 11 and the inner frame 34 joined to the water collecting and draining pipe 10 are installed at predetermined intervals from the outer form 32, and Concrete is cast to form a side wall portion of the recess 2 in a state where the portion is disposed between the outer form 32 and the inner form 34. Thus, in order to form the side wall part of the recessed part 2 in the state which installed the water drain pipe 10, after forming the side wall part of the recessed part 2 with concrete, compared with the case where the drain pipe 10 is installed in a side wall part The work process can be simplified.
Further, by forming the side wall portion of the recess 2 in a state where the water collecting and draining pipe 10 and the water blocking plate 11 are installed, the water collecting and draining pipe 10 and the water blocking plate 11 can be firmly fixed to the recess 2. 1 can improve the durability and impermeability of water.

  As mentioned above, although the preferred embodiment of the present invention was described, the present invention is not limited to the above-mentioned embodiment, and various modifications can be made within the scope of the claims.

  As shown in FIG. 6 and FIG. 7, the water blocking structure 1 may include a support member 7 that supports the water collection and drainage pipe 10. The support member 7 supports a portion of the water collection and drainage pipe 10 exposed in the recess 2. The support member 7 is disposed on the bottom surface 2 b of the recess 2. Strictly, the support member 7 is disposed on the water blocking portion 4 disposed on the bottom surface 2 b. That is, the support member 7 is installed after laying the water blocking portion 4 on the side surface 2 a and the bottom surface 2 b of the recess 2. It is preferable that the support member 7 support the tip end side of the central portion in the tube axial direction among the portions exposed in the recess 2 of the water collection and drainage pipe 10. The support member 7 is formed of a metal material such as steel or a synthetic resin. The shape of the support member 7 is not limited to the shapes shown in FIGS. 6 and 7.

  By providing the support member 7, it is possible to suppress that a portion of the water collection and drainage pipe 10 exposed in the recess 2 causes deformation such as bending due to its own weight and aging deterioration of the water collection and drainage pipe 10. When the water collection and drainage pipe 10 is bent and deformed when forming the water shielding structure, it becomes difficult to perform the work of connecting the perforated water collection and drainage pipe 5 to the water collection and drainage pipe 10. In addition, when the water collection and drainage pipe 10 is bent and deformed, damage such as peeling may occur in the joint portion 12 that joins the water blocking plate 11 and the water collection and drainage pipe 10. By providing the support member 7 to suppress the bending deformation of the water collection and drainage pipe 10, the connection work between the water collection and drainage pipe 10 and the perforated water collection and drainage pipe 5 can be easily performed, and the breakage of the joint 12 can be suppressed.

  In the above embodiment, the lower layer protection mat 24 and the middle layer protection mat 23 are not disposed in the lower part of the surface of the water shielding plate 11 than the through holes 11a, but at least at least the lower layer protection mat 24 and the middle layer protection mat 23 One may be arranged.

  In the above embodiment, the inner mold 34 is disposed so that a part of the inner mold 34 and a part of the water blocking plate 11 overlap, but the inner mold 34 is disposed outside the water blocking board 11 It is also good. That is, the inner formwork 34 may be installed to form a rectangular opening, and the water blocking plate 11 may be fitted to the opening.

  In the said embodiment, although the surface of the water blocking board 11 is arrange | positioned flush | level with the surface of the concrete wall of the recessed part 2, it may not be flush | level.

  Although the said embodiment is an example which applied this invention to the impermeable structure of a waste disposal site, the application object of this invention is not limited to the impermeable structure of a waste disposal site. The present invention lays a water-impervious sheet on the side and bottom of a recess formed on the ground, and if it is a water-impervious structure in which the inside and the outside of the recess are communicated by a communicating pipe, the water-impervious structure other than waste disposal site Is also applicable. For example, the present invention may be applied to a water control structure such as a control reservoir for adjusting the amount of water at the time of river increase, and a reservoir for storing river water and rain water. The communication pipe of the present invention may be one for discharging water from the recess to the outside, or may be one for letting water flow into the recess.

  In the above embodiment, the molds (32, 34) are installed using the side surface of the depression 30 formed on the ground, and the concave portion 2 is formed by concrete. The structure and formation method of the concave portion of are not limited to this. For example, a formwork may be provided on a flat surface, and the side wall portion of the recess may be formed of concrete. Alternatively, the formwork may be installed utilizing the topography only in part, and the side wall portion of the recess may be formed of concrete. Moreover, the side wall part of a recessed part may be formed by arranging a concrete block. In addition, a part of the recess may be formed of soil. For example, of the side wall portions of the recess, the periphery of the communicating pipe unit may be formed of concrete, and the other portion may be formed of soil.

1 Water-impervious structure of waste disposal site 2 Recess 2a Side 2b Bottom 3 Collector and drainage pipe unit (communication pipe unit)
4 water blocking part 5 perforated water collection and drainage pipe 6 drainage pipe 10 water collection and drainage pipe (communication pipe)
11 water impermeable plate 12 joint portion 20 upper layer water impermeable sheet (water impermeable sheet)
21 Lower layer impermeable sheet (impermeable sheet)
22 upper layer protection mat 23 middle layer protection mat 24 lower layer protection mat 25 bonding portion 26 bonding portion 32 outer molding frame 34 inner molding frame

Claims (6)

It is used for a water blocking structure in which a water blocking sheet is laid on the side surface and bottom surface of a recess formed on the ground, and the inside and the outside of the recess are communicated by a communicating pipe,
One water-impervious plate made of thermoplastic resin, which is a flat plate having a through hole, which is higher in rigidity than the water-impervious sheet, and is disposed to form a part of the side surface of the recess;
The communication pipe made of a thermoplastic resin embedded in the side wall portion of the recess so as to pass through the through hole of the water impermeable plate and expose one end thereof in the recess;
Formed by fusing material made of thermoplastic resin, have a, a joining portion for joining over the entire circumference of the outer peripheral surface of the through-hole edge and the communicating pipe of the water shielding plate,
The water blocking plate is provided obliquely to the communicating pipe so as to form a part of the side surface of the recess,
The communication pipe is spaced from the bottom of the recess, and protrudes in the outward direction of the recess from the water blocking plate so as to be embedded in a portion protruding inward of the recess from the water blocking plate and the side wall portion communicating pipe unit, wherein Rukoto such from the portion.   The communication pipe unit according to claim 1, wherein the communication pipe, the water blocking plate, and the joint portion are formed of the same thermoplastic resin.   The communication pipe unit according to claim 2, wherein the communication pipe, the water blocking plate, and the joint portion are formed of polyethylene. A water blocking structure is provided by laying a water blocking sheet on the side surface and the bottom surface of a recess formed on the ground, and communicating the inside and the outside of the recess by a communicating pipe,
One water-impervious plate made of thermoplastic resin, which is a flat plate having a through hole, which is higher in rigidity than the water-impervious sheet and which forms a part of the side surface of the recess,
The communication pipe made of a thermoplastic resin embedded in the side wall portion of the recess so as to pass through the through hole of the water impermeable plate and expose one end thereof in the recess;
A bonding portion formed of a fusion material made of a thermoplastic resin and bonding an edge portion of the through hole of the water shielding plate and an outer peripheral surface of the communicating pipe over the entire circumference;
An inner direction of the surface of the concave portion of the water shielding plate, have a, and the water shield sheets to be joined over the entire periphery around the through hole,
The water blocking plate is provided obliquely to the communicating pipe so as to form a part of the side surface of the recess,
The communication pipe is spaced from the bottom of the recess, and protrudes in the outward direction of the recess from the water blocking plate so as to be embedded in a portion protruding inward of the recess from the water blocking plate and the side wall portion water-impervious structure, wherein Rukoto such from the portion. A water blocking construction method of laying a water blocking sheet on the side surface and the bottom surface of a recess formed on the ground to form a water blocking structure in which the inside and the outside of the recess are communicated by a communicating pipe,
The communication pipe made of thermoplastic resin is made to penetrate through a through hole formed in a single water shielding plate made of thermoplastic resin, which is flat and has higher rigidity than the water shielding sheet. Bonding the edges of the through holes of the plate and the outer peripheral surface of the communicating pipe over the entire periphery using a fusion material made of a melted thermoplastic resin;
A side wall portion forming step of forming a side wall portion of the recess in a state in which the water blocking plate joined to the communicating pipe in the joining step is disposed at a position which is a part of the side surface of the recess;
After the side wall portion forming step, the water-impervious sheet is bonded to the inner surface of the concave portion of the water-impervious plate around the entire periphery of the through hole, and the water shield is formed on the side and bottom of the concave portion. a water shield sheet laying step for laying a water sheet, was closed,
In the bonding step, the water blocking plate is provided obliquely to the communication pipe so as to form a part of the side surface of the recess, and the communication pipe is spaced from the bottom of the recess, an inner direction protruding portion of the shielding said recess from the water plate, so as to be embedded in the side wall portions, shielding and wherein Rukoto provided to comprise a portion projecting outwardly of said recess from water shield plate Water method. Before the side wall forming step, an outer mold is installed at a position where the side wall of the recess is to be formed, and a predetermined distance is provided from the outer mold to form an inner mold and the bonding step. Performing a form setting process of installing the water blocking plate joined to the communication pipe;
In the side wall portion forming step, concrete is poured between the outer mold, the inner mold and the water blocking plate and solidified, and then the outer mold and the inner mold are removed. The water blocking method according to claim 5, characterized in that:

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