JP2000350971A - Final disposal site of waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To collectively and concentratedly perform the control related to the leakage of sewage in a locally limited manner. SOLUTION: A part of an excavated bottom surface 7 is digged down further deeply to form a sewage storage recessed place 4, and an equipment for inspecting the water quality of stored sewage and an equipment discharging the stored sewage to an outside sewage treatment equipment are provided to this recessed place. A water permeable cushioning layer and mat-like air bag are laid between a water barrier layer 11 and excavated bottom surface 7, 8 in a superposed state and the mat-like air bag is divided into appropriate areas and a compressed air supply pipe fitted with a pressure gauge, an exhaust pipe and a filler injection pipe are attached at the every area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a final waste disposal site.

[0002]

2. Description of the Related Art Conventionally, in waste disposal sites, wastewater (wastewater contained in the wastewater and rainwater falling on the wastewater is passed through the wastewater while passing through the wastewater). In order to prevent leaching for some reason, so-called pollution, technical standards for impermeable works etc. are legally established, and various Although technology is being developed, it is actually difficult to effectively and reliably manage the leaching of sewage (prevention, detection and restoration of sewage leaching) at a vast waste disposal site.

[0003]

SUMMARY OF THE INVENTION The problem to be solved by the present invention (object of the present invention) is that, in view of the above-mentioned circumstances, the management related to the leakage of waste liquid is limited and performed intensively and intensively. Accordingly, it is an object of the present invention to provide a final waste disposal site capable of properly performing the three operations of preventing, detecting, and repairing wastewater leakage in a comprehensive manner.

[0004]

In order to solve the above-mentioned problems, a first waste final disposal site according to the present invention (a waste final disposal site according to the first aspect of the present invention) is used for storing waste. At the final waste disposal site, which is covered with a dike, etc., a part of the excavation bottom is dug deeper to form a filth storage recess. The wastewater storage recess is provided with equipment for inspecting the water quality of the stored wastewater and equipment for discharging the stored wastewater to an off-site wastewater treatment facility.

[0005] Further, in the second waste disposal site of the present invention (the waste final disposal plant of the first aspect of the present invention), a water-permeable buffer layer and a mat-like structure are provided between the water shield and the excavation bottom surface. The air bags are laid one on top of the other, and the mat-shaped air bags are appropriately divided into sections, and each section is provided with a compressed air supply pipe equipped with a flow control valve, a pressure control valve, a pressure gauge, and a shutoff valve. An exhaust pipe and a filler injection pipe are attached.

In the first waste final disposal site of the present invention, the waste liquid storage recess where the waste liquid stays for a relatively long time is intensively and intensively managed, and the second waste final disposal site of the present invention is provided. At the final waste disposal site, mat-type air bladders laid at the locations where waste is frequently damaged due to breakage of water barriers will be focused on, effectively preventing damage from wastewater leakage. can do.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a final waste disposal site having the features of the first and second final waste disposal sites of the present invention will be described with reference to the drawings. The disposal site 1 is formed by digging a substantially flat ground so that the plane shape becomes a horizontally long rectangle, and surrounding the digging portion 2 by a bank body 3. In FIG. 1 (plan view), a left portion is formed. Are omitted in the figure, but are symmetrical.

[0008] The central portion in the horizontal direction of the digging portion 2 is dug deeper to an appropriate width to form a filth storage recess 4 (hereinafter, the portion of the digging portion 2 excluding the filth storage recess 4 is generally excavated). In the part of the bank 3 facing one end of the waste storage recess 4, a facility for inspecting the water quality of the waste liquid in the waste storage recess 4 and the inspected waste liquid are discharged out of the site. A structure 6 incorporating equipment is installed.

In the illustrated waste final treatment plant 1, a water-permeable buffer layer 9 is formed on the excavated bottom surface 7 of the general excavation section 5 and the excavated bottom surface 8 of the waste liquid storage recess 4 as will be described later in detail. And a mat-shaped air bag 10 are laid on top of each other, and a specified water-blocking work 11 is applied thereon. The excavation bottom surface 7 of the general excavation part 5 is gently inclined toward the waste liquid storage recess 4. The sewage that has reached the surface of the water shield 11 through the waste stored in the final waste disposal site 1 quickly flows toward the sewage storage recess 4, The liquid storage recess 4 stores the amount of heavy rain water (for example, 3) that falls on the site of the final waste disposal site 1.
(Approximately 00 mm / day) so that it can receive and store almost the entire amount. By focusing on this waste storage recess 4, damage caused by leaching of waste liquid from the final waste disposal site 1 is reduced. It can be reasonably and effectively prevented.

The water-permeable buffer layer 9 is made of, for example, straw,
There is a perforated vinyl pipe inside.

The mat-shaped air bladder 10 is appropriately divided into sections, and is held by a spacing member 12 so as to form a mat when compressed air is introduced therein. A compressed air supply pipe 16 provided with a pressure regulating valve 14 and a flow control valve 15, an exhaust pipe 17 with a shutoff valve, and a filler injection pipe 18 are attached (the compressed air supply pipe 16 is discarded). It is connected to the main compressed air pipe 19 installed around the site of the final disposal site 1).

In the mat-shaped air bag 10, when waste is put on the water shield 11 and landfilling is started, compressed air is put into the air bag 10, and the pressure regulating valve 14 and the like are adjusted so that the upper waste and the like are removed. In this condition, if the impermeable structure 11 is damaged for any reason,
The filth leached on the back surface of the water shield 11 is absorbed by the water-permeable buffer layer 9.

When the damage reaches the mat-shaped air bag 10 beyond the water shield 11 and the water-permeable buffer layer 9, air is released from the mat-shaped air bag 10 and the pressure in the mat-shaped air bag 10 is reduced. And the pressure gauge 14 can detect the occurrence of the damage and its location.
Is closed, the exhaust pipe 17 is opened, and while the air in the mat-shaped air bladder 10 is evacuated, a solution of a filler such as cement or bentonite is injected into the mat-shaped air bladder 10 and a damaged portion from the filler injecting pipe 18. To repair damaged areas and prevent further leaching and diffusion of wastewater.

The water-permeable buffer layer 9 and the mat-shaped air bag 1
As shown in FIG. 4, the laying of “0” may be single in the general excavation part 5, but is preferably double in the waste liquid storage recess 4.

In the figure, reference numeral 20 denotes a waterproof film built below the embankment body 3, and reference numeral 21 denotes a waterproof film built below the digging portion 2, which is located around the site of the final waste disposal site. When the groundwater level of the ground is high, the watertightness is improved by increasing the streamline length of the groundwater with such a water blocking film to reduce the lift pressure of the groundwater acting on the lower rear side of the watershed 11 or the like. Damage due to lifting of the work 11 or the like can be prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway plan view of an example of a final waste disposal site having the features of the first and second final waste disposal sites of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view taken along line YY of FIG.

FIG. 4 is an enlarged view of a part (arrow A part) of FIG. 2;

FIG. 5 is an enlarged plan view of a polymer of a water shield, a water-permeable buffer layer, and a mat-shaped air bag.

FIG. 6 is an enlarged side view of the same.

[Explanation of symbols]

1: Final landfill site for waste, 2: Drilling section, 3: Embankment, 4:
Soil storage recess, 5: General excavation part, 6: Structure, 7: Excavation bottom, 8: Excavation bottom, 9: Water-permeable buffer layer, 10: Mat-shaped air bag, 11: Water barrier, 12: Interval Holding material, 13: pressure gauge, 14: pressure regulating valve, 15: flow control valve, 16: compressed air supply pipe, 17: exhaust pipe, 18: filler injection pipe, 1
9: Main compressed air pipe, 20: water blocking film, 21: water blocking film.

Claims (2)

[Claims] Digging down the ground to contain waste;
The excavation bottom is covered with a seepage control, and a part of the excavation bottom is dug deeper to form a waste storage recess at the final waste disposal site surrounded by a dike, etc. A final disposal site for waste, wherein a facility for inspecting the quality of stored wastewater and a facility for discharging the stored wastewater to an off-site wastewater treatment facility are provided in the recess. 2. Drilling down the ground to contain waste.
The excavation bottom is covered with water impervious work, and a water-permeable buffer layer and a mat-shaped air bag are overlapped between the water impervious work and the excavation bottom at the final waste disposal site surrounded by a dike, etc. The compressed air supply pipe equipped with a flow control valve, a pressure control valve and a pressure gauge, an exhaust pipe equipped with a shutoff valve, and a filling are provided for each section. A final waste disposal site, which is equipped with a material injection pipe.