JPH06210259A - Laying of water barrier sheet on waste throwing hole - Google Patents

Abstract

PURPOSE:To contribute to cost reduction by easily laying a water barrier sheet on a waste throwing hole. CONSTITUTION:When a stepped part 15 is provided on the way of the inclined surface of a waste throwing hole 11, the stepped part 15 is formed so that the distance M from the front end edge 15a thereof to the rear end edge 15b thereof is formed long and a recessed part 15c having an inverted triangular shape having the stepped part 15 and the upper inclined surface as both oblique sides with respect to a horizontal line L is formed, and the lower end part 16a of the upper water barrier sheet extending over the total width of the stepped part 15 and upper end part 17a of the lower water barrier sheet 17 are superposed one upon another and the superposed part is thermally welded to lay gravels 19, 19....

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of laying a water-blocking sheet in a waste dumping hole, and more particularly, to providing a water-blocking sheet in the waste dumping hole which can contribute to improvement of workability and cost reduction. It concerns the method of laying.

[0002]

2. Description of the Related Art A conventional waste treatment method of this kind will be described with reference to FIGS. In the figure, reference numeral 1 designates a dumping hole excavated for dumping the wastes 2, 2. The surface of the dump hole 1 is treated to have a substantially smooth surface, and water-impervious sheets 3, 3, ... Of PVC, rubber or the like are stretched on the surface. Then, the respective edge portions of the water-impermeable sheets 3, 3 ... Are superposed on each other, and the superposed portions 3a, 3a.

In this way, sand particles 4, 4 ... Are spread over the upper surface of the stretched water-impervious sheets 3, 3 ... to a predetermined thickness to form a landfill 5 for wastes 2, 2. Therefore, when the wastes 2, 2, ... Are sequentially dumped on the sand grains 4, 4, ... And the dumping hole 1 is filled almost completely, the water-blocking sheets 3, 3 ,. Are stretched, the overlapping portions of the edges thereof are heat-welded, and the soil 5a, 5a, ... Are embanked on the water-impermeable sheets 3, 3, ... For waste treatment.

.. are provided horizontally on the slopes of the dumping hole 1 in the horizontal direction, and further on the rear side of the horizontal steps 6, 6 ... The grooves 7, 7 ... Are excavated. Thus, when laying the water-impervious sheets 3, 3 ... On the slope, the upper portion of the water-impermeable sheets 3, 3 ,. Placed on the stepped portions 6, 6 ..., the upper ends thereof are bent and inserted into the recessed grooves 7, 7, respectively, and placed on the bottom surfaces of the recessed grooves 7, 7 ,. . After that, concrete 8, 8 ...
Are installed to prevent the water-blocking sheets 3, 3 ... laid under the stepped portions 6, 6 ... Also, the concrete 8, 8 ...
In some cases, instead of the above-mentioned casting, concrete uphill grooves are buried to prevent the water-impermeable sheets 3, 3 ...

[0005]

In the conventional method of laying a water-blocking sheet in the waste dumping hole, a concave groove is formed in the rear part of a small horizontal step provided on the slope of the dumping hole. The upper portion of the water-blocking sheet laid in the lower portion of the step portion is bent and inserted into the groove, and the upper end portion is placed on the bottom portion of the groove, and the upper surface thereof is placed. The concrete is placed to fix the water-blocking sheet below the step, and the water-blocking sheet is constructed so as not to slide down along the slope of the dump hole. When the weight of an object is applied, the load concentrates on a step portion having a small width, particularly the concrete placing portion, and is likely to be broken. In such a case, it is conceivable that the sewage permeated into the waste from the breakage portion will seep to the surrounding ground and cause well water and other ground pollution. Further, the workability for laying the water-blocking sheet is poor, which is also a factor of cost increase.

Therefore, there arises a technical problem to be solved in order to easily lay a water-blocking sheet in a waste dumping hole and contribute to cost reduction. The purpose is to solve.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above object, and when excavating a waste dump site to form a dump hole, the dump hole is formed in the middle of its slope. In the method of laying a water-blocking sheet in the dump hole after surface-treating the dump hole, the step part is provided between the front edge and the rear end. A long distance is formed, and the upper slope and the step are formed as hypotenuses, and the recesses are formed in a substantially inverted triangle shape having the horizontal line as the base, and are fixed from the front edge to the rear end of the step. Is further formed on the stepped portion, and a water-impermeable sheet is laid on the step portion, and a water-impermeable sheet is laid on the waste dumping hole where a permeable layer that also serves as a weight is formed by laying gravel or the like. Method of laying, and when laying a water blocking sheet on the above-mentioned step, upper water blocking sheet and lower water blocking sheet There is provided a method of laying an aqueous sheet shielding the over preparative waste disposal holes thermally welded superposed on the stepped portion.

[0008]

When the waste dump hole is excavated, a step is provided on the slope of the dump hole. Further, since the step portion is formed with a long distance from the front end portion to the rear portion, a working machine such as a hydraulic excavator can be installed in the step portion to perform excavation of the dump hole and other work. The excavation work of the dump hole is smoothly performed. Further, the step portion is formed with a certain angle so that a substantially inverted triangular recess is formed by the upper slope with respect to the horizontal line, and the slope below the step portion. The upper end portion of the water-blocking sheet laid on the upper surface of the stepped portion is bent and placed over substantially the entire width of the upper surface of the stepped portion. In that case, the upper end portion of the water-impervious sheet is widely placed on the step portion, and the placed portion and the lower end portion of the upper water-impervious sheet are overlapped, and the overlapped portion is heat-welded. . Further, gravel or the like is sprinkled on the recessed portion having an inverted triangular shape formed by the heat-welded portion and the upper slope to form a water-permeable layer which also serves as a weight of the heat-welded portion.

In that case, even if the weight of the waste is loaded on the lower water-blocking sheet, the load is only one point because the upper edge of the water-blocking sheet is wide and pressed by gravel or the like. Without concentrating, it will be absorbed by the frictional resistance due to the weight of the gravel etc. spread over a wide area, therefore,
It is possible to prevent breakage of the water impervious sheet as much as possible. Of course, a tough water-proof sheet is selected. Moreover, the gravel and the like laid on the stepped portion also forms a water permeable layer, and the sewage above the stepped portion is discharged to the outside through the water permeable layer of the stepped portion, so that it does not leak to the surrounding ground. Block.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, the conventional technique will be described at the same time. FIG. 1 is a vertical cross-sectional view of a dump hole 11 excavated for dumping wastes 10, 10. In the figure, the trap 12 is placed at an appropriate position on the bottom of the dump hole 11.
Is provided. Further, a drain pipe 13 is connected to the trap 12, and the drain pipe 13 is connected to a predetermined sewage treatment plant (not shown) or the like. Further, a sensor 14 is inserted in the trap 12, and the sensor 14 is configured to detect the amount of wastewater flowing into the trap 12 or the quality of PH and the like.

The dump hole 11 is provided with a step 15 in the middle of the slope 11a. In addition, the step portion 15 has a long distance M between the front edge 15a and the rear end portion 15b, and a hydraulic excavator (not shown) or the like is installed on the step portion 15 to perform various operations. It can be so. Therefore, the excavation work of the dump hole 11 can be performed easily and quickly. Further, the step portion 15 has the step portion 15 and the upper slope 11a as hypotenuses,
It is formed in a substantially inverted triangular recess 15c having the horizontal line L as its base. Therefore, the lower end portion 16a of the upper water-impervious sheet 16 which is laid on the upper slope 11a is bent and laid on the upper surface of the stepped portion 15 forming one piece of the recess 15c, and the lower slope 11a is laid. The upper end 17a of the lower water-impervious sheet 17 to be laid is bent and overlapped on the lower end 16a of the upper water-impervious sheet 16. Therefore, the upper end portion 17a of the lower water-impervious sheet 17 and the lower end portion 16a of the upper water-impervious sheet 16 are placed over the entire width of the stepped portion 15 and overlap each other. However, it should not be particularly limited which one is the upper surface or the lower surface.

Then, the overlapping portion is heat-welded 18 to bond the upper and lower water-blocking sheets 16 and 17. Further, the gravel 1 is placed in the inverted triangular concave portion 15c including the heat welding portion 18.
9 and 19 are sprinkled, and the portion of the heat-welding 18 is attached to the gravel 1
By pressing with 9, 19, ..., In particular, the lower water-blocking sheet 1
Prevents slipping of 7. Moreover, the water-blocking sheet 16,
17 can be formed of a very tough polyethylene sheet. That is, it is natural that the water-blocking sheets 16 and 17 should be selected from materials having excellent tensile strength, tear strength, burst strength, elongation, etc., good durability and weather resistance, and strong heat-welded portions. Is.

Further, the water blocking sheet 1 is provided in the dump hole 11.
A non-woven fabric (not shown) and other materials are stretched outside 6, 7 and the waste 10, 1 discarded in the dump hole 11
It should be noted that the direct impact force of 0 ... Is mitigated and the prevention of breakage and tearing is improved. Thus, the wastes 10, 10 ... That have been dumped into the dump hole 11 are contaminated, and the dump hole 11
The sewage accumulated inside the water-blocking sheet 16, 17
Etc., so that it does not seep out to the surrounding ground outside the dump hole 11.

Further, since the gravel 19, 19 ... Is laid in the concave portion 15c formed by the step portion 15, the gravel 19, 19 ...
Not only to prevent the sludge from slipping off, but also to serve as the permeable layer of the sewage retained in the upper part of the dump hole 11, and to the sewage treatment plant (not shown) through the permeable layer. Can be discharged. Further, at the bottom of the dump hole 11, even if the impermeable layer is partially damaged and the dirty water flows out from the damaged part, it flows into the trap 12 and drains from the trap 12. As a matter of course, it is formed so as to be discharged to the wastewater treatment site or the like through the pipe 13.

Thus, the sewage does not infiltrate into the surrounding ground, and the sensor 14 installed in the trap 12 detects the leaching amount or mass of the sewage and is suitable. It is natural that the following measures will be taken. or,
When the dump holes 11 are almost filled with the waste materials 10, 10, ..., As shown in FIG. 1, the water blocking sheets 20, 20, ... Are again heat-welded and stretched on the waste materials 10, 10. Then, soil 21 or the like is sprinkled thereon to form a landfill 22 for the wastes 10, 10 ..., The landfill 22 can be used in a park, a green area, or the like.

The present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modifications.

[0017]

As described in detail in the above one embodiment, the present invention is provided with a wide step portion on the slope of the waste dumping hole. Therefore, a working machine such as a hydraulic excavator is installed on the step portion. By doing so, the work can be promoted, so that the excavation work of the dump hole can be promptly performed, and it is not necessary to place concrete or to install concrete uphill grooves. Therefore, the workability is improved and the cost is reduced.

Further, the stepped portion is formed with a recess having a substantially inverted triangular shape with the upper oblique side being another oblique side with respect to the horizontal line, and the lower waterproof sheet and the upper waterproof sheet are formed in the concave section. The respective end portions of and are overlapped over the entire width of the step portion and are heat-welded, or one sheet of water-blocking sheet is laid on the step portion extending over the upper and lower slopes. Since the gravel is laid on the upper surface, even if the weight of the waste dumped in the dump hole is applied to the water-blocking sheet, the water-blocking sheet is rubbed by the frictional resistance in the recess due to the extensive weight of the gravel. Prevent the seat from slipping off. Thus, the load of the weight of the waste is not concentrated on a part of the water shield sheet,
The water is dispersed and absorbed in a wide range in the recesses, so that the breakage of the water-impermeable sheet can be prevented.

Further, since the gravel laid in the recess also serves as a water permeable layer, sewage remaining in the upper part of the dump hole can be discharged to a predetermined sewage treatment plant through the water permeable layer. It is an invention that exhibits various kinds of effects such as being possible.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a circle in FIG.

FIG. 3 is a vertical sectional side view showing a conventional method.

FIG. 4 is an enlarged view of a circle in FIG.

[Explanation of symbols]

 10 Waste 11 Disposal Hole 11a Slope 15 Step 15a Front Edge 15b Rear End 15c Recess 16 Upper Water Impermeable Sheet 17 Lower Water Impermeable Sheet 18 Thermal Welding 19 Gravel L Horizontal Line M Distance

Claims (2)

[Claims] 1. When excavating a waste dumping site to form a dumping hole, the dumping hole is provided with a step in the middle of the slope, and further, after the dumping hole is surface-treated, the dumping is performed. In the method of laying the water-blocking sheet in the hole, the step portion has a long distance between the front edge and the rear end portion thereof, and the upper slope and the step portion are hypotenuses, and the horizontal line is Formed with a constant angle from the front end edge of the step toward the rear end so as to form a substantially inverted triangular recess as the bottom, further laying a water-blocking sheet on the step, A method of laying a water-impervious sheet in a waste dumping hole, in which a permeable layer that also serves as a weight is formed by laying gravel or the like. 2. The water-impermeable sheet is laid on the step, and the water-impermeable sheet on the upper side and the water-impermeable sheet on the lower side are overlapped and heat-welded on the step. Method of laying water-blocking sheet in the waste dumping hole of.