JP5352023B1 - Simple bottom plate structure of final disposal site - Google Patents

Abstract

The present invention provides a simple bottom plate structure of a final disposal site that is stronger and can reliably prevent water leakage.
[Solution]
The bottom plate structure 20 has a structure in which a plurality of waterproof structures 210 composed of a waterproof unit 211 and a crushed stone 212 laid on the waterproof unit 211 are stacked via a sand layer 220. A perforated water collecting pipe 213 is disposed on the crushed stone 212 of the waterproof structure 210 in the lowermost layer. The waterproof unit 211 includes a water shielding sheet 211X and a protective mat 211Y that covers the top and bottom of the water shielding sheet 211X. Below the bottom plate structure 20, a bottom plate support 230 is provided in which impermeable improved soil is disposed so as to cover the lower surface of the bottom plate structure 20 and the entire vertical wall support 10.
[Selection] Figure 2

Description

  The present invention relates to a simple bottom slab structure of a final disposal site where a banking material containing inorganic waste is buried as a compacted body.

  Conventionally, as the bottom plate structure of this type of final disposal site, there is the following Patent Document 1 by the present applicant. The bottom plate structure of such a final disposal site has a structure in which the bottom of the final disposal site is covered with a water shielding sheet and drainage pipes are provided above and below the bottom.

  The drain pipe on the upper side of the water shielding sheet is for collecting rainwater that has fallen in the open type (no roof) final disposal site. It is verified that the water held in the disposal site including rainwater is not leaking from the water sheet.

Japanese Patent No. 4317260

  Here, the applicant of the present application studied in earnest test research to realize a stronger bottom plate structure and a higher level of safety performance to prevent water leakage at the final disposal site.

  In view of this background, an object of the present invention is to provide a simple bottom plate structure of a final disposal site that is stronger and can reliably prevent water leakage.

The simple bottom plate structure of the final disposal site of the first invention is a simple bottom plate structure of the final disposal site that fills the embankment material containing inorganic waste as a compacted molded body,
A vertical wall erected on the outer periphery of the final disposal site;
A vertical wall support in which an impermeable improved soil is disposed over the entire circumference so as to support the vertical wall outside the vertical wall;
A bottom slab structure that integrally closes the bottom of the final disposal site with the vertical wall;
Under the bottom plate structure, a bottom plate support in which an impermeable improved soil is disposed so as to cover the lower surface of the bottom plate structure and the whole vertical wall support,
The bottom slab structure includes a waterproof unit composed of a waterproof sheet and a protective mat covering the top and bottom of the waterproof sheet, and a crushed stone laid on the waterproof unit via a sand layer. The laminated structure is characterized in that a perforated water collecting pipe is provided on the crushed stone of the waterproof structure at the lowest layer.

  According to the simplified bottom plate structure of the final disposal site of the first invention, the bottom plate structure that closes the bottom of the final disposal site integrally with the vertical wall is a waterproof structure composed of a waterproof unit and a crushed stone laid on the waterproof unit. The body has a structure in which a plurality of layers are stacked via sand layers.

  Here, the waterproof unit includes a water-proof sheet and a protective mat that covers the top and bottom of the water-proof sheet, and is disposed in each layer of the waterproof structure, so that water leakage can be reliably prevented.

  Furthermore, the load applied to the bottom plate of the disposal site can be dispersed by the crushed stone on the waterproof unit, the load of the waterproof unit can be reduced, and the waterproof unit is not damaged.

  In addition, by disposing a sand layer with higher dispersibility than crushed stone between waterproof structures, the effect of dispersing the load on the bottom plate can be enhanced, and the bottom plate structure should be a simple structure other than concrete. Is possible.

  Further, under the bottom plate structure, a bottom plate support in which impermeable improved soil is disposed so as to cover the lower surface of the bottom plate structure and the entire vertical wall support is provided. Therefore, it is possible to easily prevent groundwater or the like from entering the bottom plate structure.

  Due to the bottom plate structure and the bottom plate support, the lowermost waterproof structure is not normally infiltrated with groundwater. Therefore, a perforated water collecting pipe is provided on the crushed stone of the lowermost waterproof structure, and the water collecting pipe is By monitoring, the presence or absence of water leakage can be reliably determined.

  Thus, according to the simple bottom plate structure of the final disposal site of the first invention, it is stronger and can easily and reliably prevent water leakage.

The simple bottom plate structure of the final disposal site of the second invention is the first invention,
It is supported on the said vertical wall support body, The roof part which covers the whole upper direction of the said final disposal site is provided, It is characterized by the above-mentioned.

  According to the simplified bottom plate structure of the final disposal site of the second invention, the final disposal site is a so-called closed type final disposal site with a roof, so that intrusion of rainwater from directly above the final disposal site is eliminated. Therefore, the treatment of the water retained in the disposal site becomes unnecessary, and the water collecting pipe can be used for monitoring the intrusion of rainwater or the like from outside the final disposal site.

  Thus, according to the simplified bottom plate structure of the final disposal site of the second invention, it is possible to realize safety performance at a higher level at the final disposal site.

Sectional drawing which shows the outline | summary of the simple bottom slab structure and simple vertical wall structure in a final disposal site. Explanatory drawing which shows the detail of the simple bottom slab structure and simple vertical wall structure of FIG.

  As an embodiment of the present invention, a simple bottom plate structure and a simple vertical wall structure in a final disposal site will be described.

  As shown in FIGS. 1 and 2, the final disposal site of this embodiment forms a landfill space by digging down on the ground surface GL, and a vertical wall 10 erected on the outer periphery of the landfill space, and a vertical wall 10 And a bottom slab structure 20 that covers the bottom of the landfill space in the horizontal direction, a roof portion 30 that covers the entire top of the landfill space, and an approach path 40.

  The vertical wall 10 is, for example, a wire grid, and is a structure other than concrete.

  First, the vertical wall 10 is provided with a first urethane layer 110, an inner side waterproof structure 111, and a second urethane layer 112 on the inner side surface thereof.

  The first urethane layer 110 is a coating layer in which urethane is sprayed on the inner surface of the vertical wall, and then the surface is smoothed with a trowel, a roller, or the like. Specifically, the thickness of the first urethane layer is 30 mm.

  The inner side waterproof structure 111 has a structure in which a plurality of protective mats 111Y that cover and protect the waterproof sheet 111X and the surface of the waterproof sheet 111X are stacked. Specifically, the thickness of the water shielding sheet 111X is, for example, 15 mm, and the thickness of the protective mat 111Y is, for example, 20 mm.

  The 2nd urethane layer 112 is comprised with urethane 112X which coat | covers the water-impervious sheet 111X exposed on the surface of the inner surface waterproof structure 111, and the nonflammable spray material 112Y sprayed on the surface. Specifically, regarding the thickness of the second urethane layer 112, the thickness of the urethane 112X is 30 mm, and the thickness of the nonflammable spray material 112Y is 4 mm.

  Next, the outside of the vertical wall 10 will be described.

  On the outside of the vertical wall 10, a vertical wall support 120 is provided in which impermeable improved soil is disposed over the entire circumference so as to support the vertical wall 10.

  Such impermeable improved soil can easily and effectively prevent rainwater and the like from entering the vertical wall from the ground surface and rainwater and the like from the side. In addition, the entire outer surface is supported by the vertical wall support 120, which is an impermeable improved soil, and the support strength of the vertical wall 10 can be increased.

  The vertical wall support 120 is provided with impermeable improved soil so that the outer periphery thereof expands toward the ground surface. More specifically, the outer periphery of the vertical wall support 120 is expanded stepwise by a tapered surface 121 and a horizontal surface 122. The lower part of the outer periphery is a vertical surface 123. A perforated rainwater collecting pipe 125 is disposed on the outer periphery of the horizontal surface 122.

  According to the structure of the vertical wall support 120, rainwater flows along the tapered surface 121 and the vertical surface 123. Therefore, the perforated rainwater collecting pipe 125 is disposed at the lower end position of the tapered surface 121 and the vertical surface 123, that is, the outer peripheral position of the horizontal surface 122, so that intrusion of rainwater or the like into the vertical wall support 120 can be simplified. And it can prevent reliably.

  Further, the vertical wall support 120 is provided with a support member 130 extending in the horizontal direction. The support member 130 is formed by forming a wire grid like the vertical wall 10, and one end edge of the support member 130 is connected to the vertical wall 10. In addition, diagonal members 131 as connecting reinforcements are provided at appropriate intervals in the connecting portions.

  Thereby, the support strength of the vertical wall 10 by the vertical wall support body 120 can be increased, and even when the vertical wall 10 is a simple structure other than concrete, the standing strength can be maintained.

  Next, the bottom plate structure 20 will be described.

  The bottom plate structure 20 has a structure in which a plurality of waterproof structures 210 including a waterproof unit 211 and a crushed stone 212 laid on the waterproof unit 211 are stacked via a sand layer 220 (two layers stacked in the embodiment). In addition, a perforated water collecting pipe 213 is disposed on the crushed stone 212 of the waterproof structure 210 at the lowermost layer.

  The waterproof unit 211 includes a water shielding sheet 211X and a protective mat 211Y that covers the top and bottom of the water shielding sheet 211X. Since the waterproof unit 211 having such a configuration is disposed in each layer of the waterproof structure 210, water leakage can be reliably prevented.

  Furthermore, the load applied to the bottom plate of the disposal site can be dispersed by the crushed stone 212 on the waterproof unit 211, the load on the waterproof unit 211 can be reduced, and the waterproof unit 211 is not damaged.

  Further, by disposing the sand layer 220 having higher dispersibility than the crushed stone 212 between the waterproof structures 210, the effect of dispersing the load applied to the bottom slab can be enhanced, and the bottom slab structure 20 can be a simple structure other than concrete. It becomes possible to make it.

  In addition, when arrange | positioning the sand layer 220 between the waterproof structures 210, it is preferable to arrange | position the waterproof unit 221 (same as the waterproof unit 211) in the adjacent surface with the crushed stone 212, in order to improve waterproofness.

  The water collecting pipes 213 arranged on the crushed stone 212 of the waterproof structure 210 in the lowermost layer are arranged in a mesh pattern at the bottom of the landfill space of the disposal site, and these water collecting pipes 213 face the water collecting trough (not shown). It is arranged in a mesh pattern with a downward slope.

  Next, under the bottom plate structure 20, a bottom plate support 230 is provided in which impermeable impermeable soil is disposed so as to cover the bottom surface of the bottom plate structure 20 and the entire vertical wall support 120. That is, the bottom plate structure 20 is supported by the bottom plate support 230.

  At this time, the load of the entire disposal site is distributed by the sand layer 220, and a part of the load is applied from the vertical wall 10 to the bottom plate support 230 through the vertical wall support 120 and from the bottom plate structure 20 to the bottom plate support 230. . These distributed loads can be supported by the entire bottom plate support 230, and this can be supported even when the bottom plate structure 20 is a simple structure other than concrete.

  Further, since the bottom slab support 230 in which the impermeable improved soil is disposed so as to cover the lower surface of the bottom slab structure 20 and the entire vertical wall support 120 is provided, groundwater or the like can enter the bottom slab structure 20 from below. Intrusion can be easily prevented.

  Further, the bottom plate structure 20 and the bottom plate support 230 monitor the water collecting pipe 213 of the crushed stone 212 of the bottom layer waterproof structure 210 because the bottom layer waterproof structure 210 normally does not enter groundwater or the like. By doing so, the presence or absence of water leakage can be reliably determined. Monitoring of the water collecting pipes 213 may be performed by using a water collecting basin where each water collecting pipe 213 joins, or may be individually monitored by providing an inspection well extending vertically in each water collecting pipe 213.

  Next, the roof portion 30 is formed by an inverted T-shaped foundation retaining wall 31 provided on the vertical wall support 120 and a plurality of support pillars 32 erected on the foundation retaining wall 31 so as to be directly over the final disposal site. The roof covering is supported.

  In this way, by making the final disposal site a so-called closed type final disposal site, the infiltration of rainwater from directly above the final disposal site is eliminated, the treatment of the retained water in the final disposal site becomes unnecessary, and the water collecting pipe 213 Can be used for monitoring the intrusion of rainwater from the final disposal site.

  A concrete driving portion 33 is provided on the outer peripheral side of the foundation retaining wall 31. Thereby, the surface of the vertical wall support 120 can be covered, and intrusion of rainwater or the like into the vertical wall support 120 can be prevented. Further, a water collecting groove 34 formed of a U-shaped groove is provided on the outer periphery of the driving portion 33, and rainwater or the like that flows on the surface of the driving portion 33 can be drained through the water collecting groove 34.

  Next, the approach path 40 is an approach path for carrying inorganic waste into the field from the outside of the final disposal site by a trailer, a dump truck or the like, and along the vertical wall 10 at a predetermined inclination angle (for example, 10%). It is provided (illustration is omitted for the outside carry-in route).

  The approach path 40 is formed of the same quality improved soil integrally with the vertical wall support 120, and the road surface has a structure in which a plurality of waterproof units 211 are stacked (in the embodiment, two layers), and is necessary on the road surface. Correspondingly, concrete pavement is done across the roadbed. Further, a fence 41 is provided at the edge of the road surface.

  The above is the details of the simple bottom plate structure and the simple vertical wall structure in the final disposal site of this embodiment. According to the simple bottom plate structure and the simple vertical wall structure of the final disposal site, it is possible to easily and reliably prevent the intrusion of rainwater and the like and the leakage of water from the final disposal site.

  In the present embodiment, in particular, since the roof portion 30 is provided, there is no intrusion of rainwater from directly above the final disposal site, treatment of retained water in the final disposal site is unnecessary, and the water collecting pipe 213 is connected from outside the final disposal site. It can be used for monitoring intrusion of rainwater and the like, and a higher level of safety performance can be realized.

  Here, when the roof portion 30 is not provided, that is, when a so-called open type final disposal site is provided, the final disposal is performed by providing a rainwater collecting pipe (not shown) on the crushed stone 212 of the uppermost layer of the bottom slab structure 20. The stored water in the site can be treated through the rainwater collecting pipe.

  In this case, the retained water in the final disposal site is not leaked by the inner side waterproof structure 111 of the vertical wall 10 and the waterproof structure 210 of the bottom slab structure 20, so that the rainwater from the outside of the final disposal site is mainly used as the water collecting pipe 213. It can be used as an intrusion monitor, etc., and can be used as a secondary detection of water leakage.

DESCRIPTION OF SYMBOLS 10 ... Vertical wall, 20 ... Bottom plate structure, 30 ... Roof part, 40 ... Access path, 110 ... 1st urethane layer, 111 ... Inside surface waterproof structure, 111X ... Water shielding sheet, 111Y ... Protective mat, 112 ... 1st 2 urethane layers, 112X ... urethane, 112Y ... spraying material, 120 ... vertical wall support, 121 ... taper surface, 122 ... horizontal surface, 123 ... vertical surface, 125 ... rainwater collecting pipe, 130 ... support member, 131 ... diagonal material , 210 ... waterproof structure, 211 ... waterproof unit, 211X ... water shielding sheet, 211Y ... protective mat, 213 ... water collecting pipe, 220 ... sand layer, 221 ... waterproof unit.

Claims (2)

It is a simple bottom plate structure of the final disposal site that fills up the embankment material containing inorganic waste as a compacted body,
A vertical wall erected on the outer periphery of the final disposal site;
A vertical wall support in which an impermeable improved soil is disposed over the entire circumference so as to support the vertical wall outside the vertical wall;
A bottom slab structure that integrally closes the bottom of the final disposal site with the vertical wall;
Under the bottom plate structure, a bottom plate support in which an impermeable improved soil is disposed so as to cover the lower surface of the bottom plate structure and the whole vertical wall support,
The bottom slab structure includes a waterproof unit composed of a waterproof sheet and a protective mat covering the top and bottom of the waterproof sheet, and a crushed stone laid on the waterproof unit via a sand layer. A simple bottom slab structure of a final disposal site, which is a laminated structure, wherein a perforated water collecting pipe is provided on a crushed stone of a waterproof structure at the lowest layer. In the simple bottom plate structure of the final disposal site according to claim 1,
A simplified bottom plate structure of a final disposal site, comprising a roof portion supported on the vertical wall support and covering the entire upper portion of the final disposal site.