JP3686615B2 - Construction method of waste disposal site - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technology for constructing a waste disposal site. More specifically, a wall body that forms a concave surface for dumping waste by the inner surface thereof, and a water shielding layer that covers the concave surface and has a function of preventing leakage of leachate from the concave surface to the outside. And a method for constructing a waste disposal site for constructing a waste disposal site.
[0002]
[Prior art]
The waste disposal site is provided with, for example, concrete made by digging the ground or constructing a lift wall, and includes a wall body that forms a concave surface inside. Waste is sequentially dumped into this concave surface.
[0003]
By the way, in the waste disposal site, it is extremely important to prevent the leachate generated from the waste dumped in the concave surface from leaking into the external soil from the concave surface, and various technologies are used for that purpose. Yes.
The most widely used for the leakage of leachate is to lay a water shielding sheet over the entire concave surface. Leaking water to the outside is prevented by laying a water shielding sheet made of a synthetic resin sheet or rubber sheet having high water shielding performance over the entire concave surface.
[0004]
However, the work of laying the water-impervious sheet is cumbersome and sometimes dangerous.
The water-impervious sheet is generally long and is handled in a state of being rolled into a roll, but its handling is troublesome because of its length and weight. In addition, when the water shielding sheet is laid on the inner side of the concave surface, the water shielding sheet is once placed on the upper edge of the slope that constitutes the concave surface, but this is a high place as seen from the bottom surface of the concave surface. The work will require carefulness.
[0005]
On the other hand, even if the water shielding sheet is laid as described above, the subsequent management tends to be troublesome. For example, a water-impervious sheet may float from the concave part where the concave slopes come into contact with each other, or where the slope and the bottom face touch each other. In such a case, there is a risk of damage to the waterproof sheet. . If there is damage to the water shielding sheet, it needs to be repaired immediately, so various mechanisms for monitoring the water shielding sheet damage have been proposed. Cost.
[0006]
[Problems to be solved by the invention]
The present invention is intended to provide a method for constructing a waste disposal site that can solve these problems.
More specifically, it is a method that can be applied more easily and safely than when using a water shielding sheet, and has the same function of preventing leakage of leachate as the water shielding sheet is laid, and also breaks the water shielding layer. It is an object to provide a method for constructing a waste disposal site that can obtain a waste disposal site that does not have to be managed afterwards.
[0007]
[Means for Solving the Problems]
The construction method of the waste disposal site in the present invention for solving the above-mentioned problems is as follows.
In this method, a wall body that forms a concave surface for dumping waste by its inner surface, and a water shielding layer that covers the concave surface and has a function of preventing leakage of leachate from the concave surface to the outside, The construction method of a waste disposal site for constructing a waste disposal site comprising
And a waste disposal site including a step of spraying a resin material in a layered manner on a predetermined portion of the concave surface and a step of curing the resin material, wherein the cured resin material is used as the water shielding layer. This is the construction method.
In this method, instead of using a water-impervious sheet, a water-impervious layer is formed by a resin material that has been dispersed and cured. Thereby, since it is unrelated to the above troubles by using a water shielding sheet, construction can be performed more easily and safely than when a water shielding sheet is used.
Further, since the water shielding layer has a function of preventing leakage of leachate from the concave surface to the outside, the waste disposal site obtained by this waste disposal site construction method is It is possible to prevent leakage of leachate in the same way as a sheet is laid.
Furthermore, the water shielding layer is not lifted from the concave surface by forming the water shielding layer with the resin material that has been spread and cured. Therefore, if it is a waste disposal site obtained by this waste disposal site construction method, there is little risk of damage to the impermeable layer, so there is no need to perform ex-post management on the damage to the impermeable layer. Become.
[0008]
The above-mentioned resin material may be dispersed on at least a part of the concave surface. A portion of the concave surface where the water shielding layer made of the resin material is not formed can be formed by using a water shielding sheet or the like. Of course, it is also possible to spray a resin material over the entire concave surface to form a water shielding layer made of the resin material over the entire concave surface.
As the resin material used in the method for constructing the waste disposal site of the present invention, any resin material may be used as long as it can obtain the water shielding function as described above.
As the resin material, one that forms a closed cell inside when cured can be used. If such a resin material is used, the function as a cushioning material can be given to the water shielding layer without affecting the water shielding function, so that the possibility of damage to the water shielding layer can be further suppressed. Become. For example, a hard urethane resin can be used as a resin material that forms closed cells inside when it is cured.
[0009]
The above-mentioned wall body is generally made of concrete. In the construction method of the waste disposal site according to the present invention, the resin material is sprayed and attached to at least a part of the concave surface that is the surface. However, when the concave surface is smooth, the resin material adheres to the concave surface. May not be sufficient.
In order to ensure sufficient adhesion of the resin material to the concave surface, for example, the surface of the concave surface where the resin material is sprayed is roughened to the extent that the resin material bites better before the resin material is sprayed. The method of, can be considered.
As another method, a sheet provided with predetermined unevenness on the exposed surface to facilitate the adhesion of the resin material is laid on the exposed portion of the concave resin material in a layered manner. It is conceivable that the resin material is sprayed in layers on the surface. By providing unevenness in the sheet in advance, uneven adhesion of the resin material due to the portion can be reduced. As this sheet, a sheet having a function of preventing leakage of leachate from the concave surface to the outside can be used. In this way, a double structure of a sheet having a water shielding function and a water shielding layer made of a resin material can be formed. Therefore, the waste disposal site obtained by this waste disposal site construction method is It has high reliability with respect to the water shielding function. In addition, when combined with a resin material that forms a closed cell inside when cured, the risk of damage to the sheet is small, so the reliability of the water shielding function becomes higher and higher. .
[0010]
Laying on the concave surface of the water-impervious sheet may be performed in any way. For example, it can be performed as follows. A predetermined space is provided between the concave surface and a mold frame having the sheet attached thereto is disposed on the concave surface side. Next, a gap between the sheet mounted on the mold frame and the concave surface is formed. The process of placing concrete is performed, and then the mold is removed after the concrete is hardened. By doing so, the adhesiveness between the sheet and the concave surface can be improved, so that the possibility of damage to the sheet can be further reduced. In addition, the sheet | seat in this case can be provided with two or more protrusions formed on the back surface thereof so as not to fall out from the hardened concrete.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.
[0012]
The construction method of the waste disposal site according to this embodiment is performed as shown in FIG.
In FIG. 1, 10 is a concave surface. The concave surface 10 in this embodiment is formed by digging the ground. However, the concave surface 10 may be formed by constructing a raised wall having a predetermined height around a flat bottom surface. In this embodiment, the concave surface 10 is an inner surface of a wall body made of concrete.
In the waste disposal site according to this embodiment, a water shielding layer is formed on the entire surface of the concave surface 10.
[0013]
In carrying out the method of this embodiment, first, as shown in FIG. 1 (a), a predetermined space is formed between the concave surface 10 so as to face the entire surface of the concave surface 10, and the formwork is formed. 30.
The sheet 20 is fixed to the surface of the mold frame 30 that faces the concave surface 10. Therefore, the sheet 20 is arranged to face the concave surface 10 by arranging the mold 30. Any method may be used for fixing the sheet 20 to the mold 30. However, considering that the mold 30 of this embodiment is made of wood, the sheet 20 is fixed to the mold 30 with nails. ing. Although the mold 30 can theoretically be integrated, the mold 30 in this embodiment is divided into a plurality of pieces with an appropriate size, and when all are arranged, the entire surface of the concave surface 10 is covered. Yes.
[0014]
The above-described sheet 20 is made of, for example, resin and has a water shielding function. The thickness of the sheet 20 is preferably 1 to 5 mm, but is 3 mm in this embodiment. The material may be appropriately selected on the condition that the water shielding function can be exhibited and some flexibility is ensured. In this example, a plastic resin is used.
The cross-sectional shape of the sheet 20 is shown in FIG. The sheet 20 in this embodiment includes a sheet main body 20A, and a large number of first protrusions 21 are provided on the back surface (the surface on the side not in contact with the mold 30: the left surface in FIG. 2). A large number of second protrusions 22 are integrally provided on the surface in contact with 30 (the surface on the right side in FIG. 2).
The sheet body 20A is formed in a film shape.
Although the first protrusion 21 and the second protrusion 22 in this embodiment have different sizes, they have substantially the same shape, and are substantially disk-shaped disk portions 21A and 22A, and substantially connect these to the seat body 20A. Cylindrical cylindrical portions 21B and 22B are provided.
But the 1st protrusion 21 does not need to be such a shape, and does not need to be integrated with the sheet | seat main body 20A. The first protrusions 21 need only be shaped so as not to fall off the hardened concrete, and can be made into a suitable shape such as a key shape or a coil shape other than the saddle shape as shown in FIG. . The second protrusions 22 are only required to be attached to a resin material described later, and may have other shapes as long as such irregularities are formed. Furthermore, if such unevenness is formed, the second protrusion 22 is not necessary. For example, by processing the surface of the sheet main body 20A into a corrugated shape, the second protrusion 22 can be used.
[0015]
Next, as shown in FIG. 1B, concrete 40 is provided between the concave surface 10 and the mold 30, more specifically, between the concave 10 and the sheet 20 fixed to the mold 30. To cast.
[0016]
Next, as shown in FIG. 1C, the mold 30 is removed after curing for a certain period and curing the concrete 40. As a result, the sheet 20 is arranged so as to cover the entire surface of the concave surface 10 in a state of being integrated with the layer of concrete 40 provided on the concave surface 10. The sheet 20 is in a state of being in close contact with the layer of concrete 40 due to the presence of the first protrusions 21 described above.
In addition, in order to ensure the water shielding function of the sheet 20, adjacent portions of the sheet 20 are joined by, for example, heat welding. When performing heat welding, for example, a resin made of the same material as the sheet 20 may be used. In addition, a large number of nails protrude from the sheet 20. This nail needs to be removed by pulling or cutting. The hole of the sheet 20 generated by the presence of the nail is also closed by, for example, the same heat welding as described above.
[0017]
Next, as shown in FIG. 1D, the resin material 50 is spread over the entire exposed surface of the sheet 20 in a layered manner. That is, the resin material 50 is dispersed over the entire concave surface 10. The resin material 50 is sprayed while keeping the thickness as constant as possible without causing unevenness.
The material and thickness of the resin material 50 are appropriately selected in such a range that the water shielding layer formed when the resin material 50 is cured can prevent leakage of leachate from the concave surface 10 to the outside. Moreover, the resin material 50 in this embodiment uses what forms a closed-cell body in the inside, when it hardens | cures. For example, in this embodiment, a hard urethane resin is used as the material of the resin material 50, and the thickness is set to 10 mm to 15 mm.
[0018]
When the layer of the resin material 50 is left as it is for a predetermined time and cured, the layer of the resin material 50 becomes a water shielding layer having a water shielding function.
[0019]
In this way, the waste disposal site is completed.
The waste disposal site in this embodiment may be a so-called closed type provided in the house 60 as shown in FIG. The house 60 is for preventing rainwater from entering the concave surface 10, thereby preventing leachate from accumulating in the concave surface 10.
Moreover, the waste disposal site can be provided with facilities for discharging leachate accumulated in the concave surface 10 to the outside. For example, a pipe having a large number of holes is appropriately arranged along the surface of the water shielding layer, and the inside of the pipe is sucked by a pump so that the leachate accumulated in the concave surface 10 can be discharged to the outside. May be.
[0020]
【The invention's effect】
Since the construction method of the waste disposal site according to the present invention is as described above, it can be constructed more easily and safely than when a water shielding sheet is used. In addition, the waste disposal site obtained by this has the function of preventing leakage of leachate, which is the same as laying a water-impervious sheet, and it is not necessary to perform ex-post management of damage to the water-impervious layer. It becomes.
[Brief description of the drawings]
FIG. 1 is a diagram showing an execution flow of a method for constructing a waste disposal site in a preferred embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an example of a sheet used in the method for constructing the waste disposal site shown in FIG.
3 is a diagram schematically showing an example of a waste disposal site obtained by using the method for constructing a waste disposal site shown in FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Concave surface 20 Sheet | seat 21 1st protrusion 22 2nd protrusion 30 Formwork 40 Concrete 50 Resin material 60 House

Claims (4)

The inner surface includes a wall body that forms a concave surface for waste disposal, and a water shielding layer that covers the concave surface and has a function of preventing leakage of leachate from the concave surface to the outside. A waste disposal site construction method for constructing a waste disposal site comprising:
The process of providing a predetermined interval between the concave surface and arranging a form attached to the concave surface side of the sheet having a function of preventing leakage of leachate from the concave surface to the outside,
Placing concrete in the gap between the sheet attached to the mold and the concave surface;
A process of removing the formwork after the concrete is hardened;
A process of spreading a resin material in layers on the surface of the sheet remaining after removing the formwork,
Curing the resin material,
The sheet is provided with a plurality of protrusions shaped so as not to fall out of the hardened concrete on the concave surface, and the resin material easily adheres to the surface on which the resin material is dispersed. Using a wave-shaped unevenness like
A construction method of a waste disposal site, wherein the cured resin material is the water shielding layer. As the resin material, one that forms closed cells inside when cured is used.
The construction method of the waste disposal site of Claim 1. A hard urethane resin is used as the resin material.
The construction method of the waste disposal site of Claim 1. The resin material is spread over the entire concave surface,
The construction method of the waste disposal site of Claim 1.

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