JP4030210B2 - Bottom structure of dome-type waste disposal site - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bottom structure of a dome-type waste disposal site.
[0002]
[Prior art]
In recent years, a dome-type waste disposal site comprising a bottom portion provided on the ground and an upwardly convex substantially hemispherical concrete wall portion provided on the bottom portion has been provided.
Many of these dome-type waste disposal sites can swell the film body into an approximately hemispherical shape that protrudes upward, spray concrete on this film body, and harden it to build the wall, so assembling and removing the concrete formwork Work is unnecessary, and there are advantages such as shortening the construction period and reducing costs.
In a dome-type waste disposal site, a closed space is formed in the interior by the bottom and hemispherical wall, and waste is poured into this closed space, and the dome is filled when the garbage is full in the closed space. The landfill is dumped in a landfill and used as a site for parks.
[0003]
[Problems to be solved by the invention]
By the way, in such a dome-type waste disposal site, it is necessary to carry out the stabilization processing of the thrown-in waste so that the former site can be used. Here, the stabilization treatment is a treatment that removes harmful components contained in the waste or does not elute even if it touches rainwater or groundwater.
This stabilization process is preferably performed in the closed space because the waste disposal site is dome-shaped and has a closed space.
In that case, as a premise, for example, it is assumed that the bottom portion has a sufficient water shielding function so that moisture in the garbage does not leak from the bottom portion to the outside.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a dome shape that is advantageous in performing a dust stabilization process in an internal closed space having a sufficient water shielding function at the bottom. To provide the bottom of the landfill.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a bottom part provided on the ground and an upwardly convex substantially hemispherical concrete wall part provided on the bottom part, and is surrounded by the bottom part and the wall part. In the dome-type waste disposal site where waste is thrown into the closed space, the bottom portion is formed on the first water-proof sheet having water-blocking properties laid on the ground and the first water-proof sheet. A water permeable layer capable of transmitting water, a concrete bottom slab provided on the water permeable layer, an asphalt concrete layer having water shielding property placed on the concrete bottom slab, and the asphalt concrete layer. A second water-impervious sheet laid on the water-impervious sheet; and a protective layer of the water-impervious sheet laid on the second water-impervious sheet. On the layer And muscle is rebar, consists Da設 been concrete over the leveled concrete layer as this rebar is embedded, said wall portion is characterized in that it rises from the concrete deck slabs.
Moreover, the present invention is characterized in that non-woven fabrics are laid between the ground and the first water shielding sheet and between the asphalt concrete layer and the second water shielding sheet, respectively.
Further, the present invention is characterized in that concrete is cast on the water-permeable layer to provide a leveled concrete layer, and the concrete bottom slab is provided on the leveled concrete layer.
In the present invention, the protective layer has water permeability, and the nonwoven fabric laid between the ground and the first water shielding sheet, the water permeable layer, and the protective layer detect water leakage. The detection line for this is embedded, It is characterized by the above-mentioned.
[0005]
In the present invention, the bottom of the dome-type waste disposal site is configured to include a sheet or layer having three water-impervious properties, namely, a first water-impervious sheet, an asphalt concrete layer, and a second water-impervious sheet. Therefore, a sufficient water shielding function is exhibited, which is extremely advantageous in performing the dust stabilization process in the closed space.
In addition, even if uneven subsidence occurs in the ground and cracks occur in the concrete bottom slab, the asphalt concrete layer follows the deformation of the cracks and deforms while maintaining the water shielding function, so it can handle uneven subsidence etc. This is extremely advantageous for maintenance of the dome-type waste disposal site.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional front view of a dome-type waste disposal site, and FIG. 2 is an enlarged sectional view of a bottom portion.
The dome-type waste disposal site 12 includes a bottom portion 14 and an upwardly convex substantially hemispherical (dome-shaped) concrete wall portion 16 provided on the bottom portion, and a closed space 18 is formed therein. Has been.
The wall portion 16 is provided with a garbage inlet 20, which is configured to be opened and closed by a lid 22, and in FIG. 1, reference numeral 24 denotes a dump truck that is filled up to reach the garbage inlet 20. A reference numeral 26 denotes a waste, and a reference numeral 26 denotes garbage put into the closed space 18.
[0007]
As shown in FIG. 2, the bottom portion 14 is formed on the nonwoven fabric 32 laid on the ground 28, the first water shielding sheet 34 laid on the nonwoven fabric 32, and the first water shielding sheet 34. The provided water permeable layer 36, the leveled concrete layer 38 placed on the water permeable layer 36, the concrete bottom plate 40 provided on the leveled concrete layer 38, and the concrete bottom plate 40 The asphalt concrete layer 42, the nonwoven fabric 44 laid on the asphalt concrete layer 42, the second water shielding sheet 46 laid on the nonwoven fabric 44, and the second water shielding sheet 46. And a protective layer 48 of the water shielding sheet 46.
[0008]
The nonwoven fabric 32 laid on the ground 28 is provided to protect the first water shielding sheet 34, and has a thickness of about 10 mm, for example. The nonwoven fabric 32 can be changed to another member, or can be omitted depending on the properties of the ground.
The first water shielding sheet 34 is formed so as to block water permeation. For example, a sheet made of a synthetic resin having a water shielding thickness of about 1.5 mm is used.
[0009]
In the present embodiment, a detection line 50 constituting a water leakage detection system is laid in the nonwoven fabric 32.
The water leak detection system detects the occurrence of water leak and the location of the water leak when water leaks to the nonwoven fabric 32 through the first impermeable sheet 34. The detection system includes a detection line 50.
The detection wire 50 is formed by twisting a resistance wire made of a material having a relatively high electrical resistance and a conductive wire having a low electrical resistance with an insulating material that loses insulation when wetted with water such as a nonwoven fabric. It is configured together. A plurality of detection lines 50 are arranged at predetermined intervals so as to be distributed over almost the entire area of the nonwoven fabric 32.
One end of the resistance line of each detection line 50 is grounded, and a predetermined voltage is applied to the other end. If water leakage occurs at any one location, the portion of the detection line 50 closest to the water leakage location. In this case, since the insulating material loses the insulating property, the resistance wire and the conductive wire which are rubbed against each other are short-circuited. And the voltage of the resistance wire in the short circuit location is detected via a conducting wire. Therefore, it is possible to detect the occurrence of water leakage due to the occurrence of a voltage on the conductor of a certain detection line 50, and the water leakage occurs at any position in the length direction of the detection line 50 from the magnitude of the voltage. Can be detected. If it is detected that water leakage has occurred in this way, repair of the water leakage point is performed.
[0010]
The water permeable layer 36 is constructed by laying sand or the like to a predetermined thickness (for example, about 150 mm) and has water permeability. The water permeable layer 36 protects the first water-impervious sheet 34 and embeds a detection line 52. The water permeable layer 36 has a detection line 52 that constitutes a water leakage detection system in the same manner as described above. Buried.
The leveled concrete layer 38 reinforces the concrete bottom plate 40 and is provided with a thickness of, for example, about 100 mm, and can be omitted depending on the properties of the ground or by making the concrete bottom plate 40 thick and strong. .
[0011]
The concrete bottom slab 40 is provided on the leveled concrete layer 38. The reinforcing bar arranged on the leveled concrete layer 38 and the leveled concrete layer 38 are placed so that the reinforcing bar is buried. The wall portion 16 is erected from the concrete bottom plate 40, for example, with a thickness of about 300 mm.
The asphalt concrete layer 42 has a water shielding property and can be deformed while maintaining a water shielding function. For example, the asphalt concrete layer 42 is provided with a thickness of about 125 mm.
[0012]
The non-woven fabric 44 is provided to protect the second water-impervious sheet 46, and has a thickness of, for example, about 10 mm. The non-woven fabric 44 may be changed to another member or omitted. Is possible.
The second water-impervious sheet 46 is formed so as to block water permeation in the same manner as the first water-impervious sheet 34. For example, the second water-impervious sheet 46 has a water-impervious thickness of about 1.5 mm. A resin sheet is used.
The protective layer 36 is configured by laying sand or the like to a predetermined thickness (for example, about 300 mm), and has water permeability in the present embodiment. The protective layer 48 protects the second water-impervious sheet 46 and embeds a detection line 54. The protective layer 48 includes a detection line 54 that constitutes a water leakage detection system in the same manner as described above. Buried.
[0013]
In the present embodiment, as described above, the bottom portion 14 of the dome-type waste disposal site 12 has three water-impervious properties of the first water-impervious sheet 34, the asphalt concrete layer 42, and the second water-impervious sheet 46. Since it is configured to include the sheet or layer, it has a sufficient water shielding function and is extremely advantageous in performing the dust stabilization process in the closed space.
In addition, since the asphalt concrete layer 42 is provided on the concrete bottom plate 40, even if uneven settlement occurs in the ground and cracks or the like enter the concrete bottom plate 40, the asphalt concrete layer 42 follows the deformation of the cracks and blocks it. Since it is deformed while maintaining the water function, it is possible to cope with uneven settlement and the like, which is extremely advantageous for maintenance of the dome-type waste disposal site 12.
Further, as in the embodiment, the nonwoven fabric 32 and the water permeable layer 36 are provided as members for protecting the first water-impervious sheet 34, and the protective layer 36 is provided as a member for protecting the second water-impervious sheet 46. 32, the water permeable layer 36, and the protective layer 36 are configured to have water permeability. The nonwoven fabric 32, the water permeable layer 36, and the protective layer 36 not only have a function of protecting the water shielding sheet but also conduct the resistance wire and the conductive wire due to water leakage. Therefore, it is possible to embed a detection line constituting the water leakage detection system, which is advantageous in constructing the water leakage detection system.
[0014]
【The invention's effect】
As is clear from the above description, the present invention comprises a bottom portion provided on the ground and an upwardly convex substantially hemispherical concrete wall portion provided on the bottom portion, and the bottom portion and the wall portion. In the dome-type waste disposal site where waste is thrown into the enclosed space surrounded by the first water-impervious sheet having water-impervious property laid on the ground, and the first water-impervious sheet. A water permeable layer provided on the water permeable layer, a concrete bottom slab provided on the water permeable layer, a water-impervious asphalt concrete layer placed on the concrete bottom slab, and the asphalt concrete A second water-impervious sheet having a water-impervious property laid on the layer, and a protective layer for the water-impervious sheet laid on the second water-impervious sheet. Of concrete layer And reinforcing bars are Haisuji, this reinforcing bar consists Da設 by concrete so leveled on the concrete layer as embedded, said wall portion has a structure that is erected from the concrete deck slabs.
Therefore, according to the present invention, the bottom of the dome-type waste disposal site exhibits a sufficient water-blocking function, which is extremely advantageous for stabilizing waste in the enclosed space, and also for uneven settlement. This is extremely advantageous for maintenance of the dome-type waste disposal site.
[Brief description of the drawings]
FIG. 1 is a cross-sectional front view of a dome-type waste disposal site.
FIG. 2 is an enlarged cross-sectional view of the bottom of the dome-type waste disposal site.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 12 Dome-type waste disposal site 14 Bottom part 16 Wall part 18 Closed space 32, 44 Non-woven fabric 34 First water-impervious sheet 36 Water-permeable layer 38 Leveled concrete layer 40 Concrete bottom plate 42 Asphalt concrete layer 46 Second water-impervious sheet 48 Protective layer

Claims (4)

It consists of a bottom part provided on the ground and an upwardly convex substantially hemispherical concrete wall part provided on the bottom part, and waste is thrown into the enclosed space surrounded by the bottom part and the wall part. At the dome-type waste disposal site,
The bottom is
A first water shielding sheet having a water shielding property laid on the ground;
A water permeable layer capable of transmitting water provided on the first water shielding sheet;
A concrete bottom slab provided on the water permeable layer;
An asphalt concrete layer having a water shielding property placed on the concrete bottom slab,
A second water shielding sheet having a water shielding property laid on the asphalt concrete layer;
A protective layer of a water-impervious sheet laid on the second water-impervious sheet, and the concrete bottom slab has a reinforcing bar arranged on the leveled concrete layer and the reinforcing bar embedded therein. Made of concrete placed on the leveled concrete layer,
The wall portion stands up from the concrete bottom slab,
The bottom structure of a dome-type waste disposal site characterized by that. The dome-shaped waste according to claim 1, wherein non-woven fabrics are laid between the ground and the first water shielding sheet, and between the asphalt concrete layer and the second water shielding sheet, respectively. The bottom structure of the disposal site. 3. The dome type according to claim 1, wherein concrete is cast on the water permeable layer to provide a leveled concrete layer, and the concrete bottom slab is provided on the leveled concrete layer. The bottom structure of the garbage disposal site. The protective layer has water permeability, and a non-woven fabric laid between the ground and the first water shielding sheet, the water permeable layer, and a detection line for detecting water leakage are embedded in the protective layer. The bottom structure of a dome-type waste disposal site according to claim 1, 2, or 3, wherein

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