JP2676482B2 - Management method of managed final disposal site and its managed final disposal site - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is suitable management and management of managed final disposal site, to concretely realize this method
It is related to the type final disposal site .

[0002]

2. Description of the Related Art Heretofore, this type is as follows. The conventional controlled final disposal site is composed of a single waterproof sheet.

[0003]

The above-mentioned prior art has the following problems. 1. The damage of the water blocking sheet, that is, the water blocking effect of the water blocking sheet,
It is very difficult to trace the damaged part of the impermeable sheet because the judgment is made on the basis of the contamination status of groundwater around the disposal site on a regular basis. 2. If the breakage of the water-blocking sheet is found by this, it leads to contaminating the stratum around it, and it will be expensive to repair it. 3. In the landfill work of wastes, damage to the water barrier sheet on the slope due to the compaction machine often occurs, but prevention of it was a problem.

[0004] The present application has been made in view of such problems of the prior art, and an object thereof is to provide the following. 1. The controlled final disposal site uses a water-blocking sheet to prevent groundwater contamination from leachate from landfill waste. Under the condition of seepage control of the leachate by the water shield sheet, it will be managed for a long time from the start of landfill to the end of landfill. Therefore, simplifying this management method leads to great cost savings. 2. Damage to the impermeable sheet on the slope is partially repaired, but it may be weakened by the repair, so it is necessary to avoid damage to the impermeable sheet as much as possible. With the conventional method, the life of the water-blocking sheet is concerned.

[0005]

In order to achieve the above object, the present invention is as follows. That is,
The first invention is that the lower layer water-permeable sheet stretched over the bottom of the depression for the repository, the sand or gravel filled on the upper surface of the lower layer water-permeable sheet, and the sand or gravel stretched over the upper surface. In a managed final disposal site consisting of an upper layer impermeable sheet, if the upper layer impermeable sheet is damaged, the leachate of the waste that has entered the sand or gravel through the damaged part can be removed by electrical conduction. A managed landfill management method configured to detect. In this case, when the upper layer water-blocking sheet is damaged, the leachate of the waste that has entered the sand or gravel through the damaged part is detected after the leachate is detected by electrical conduction, etc., and then it is discharged. be able to.

In the second aspect of the present invention, the recessed portion 2 for the disposal site, which is formed by excavating and shaping the desired location of the controlled final disposal site, has a flat rectangular bottom 2A having a predetermined size.
And the front, rear, left, and right slopes 2B that are continuously provided around the bottom.
And a slope portion 2C formed on a part of the slope, and the water-blocking sheet 3 stretched on the surface of the recessed portion 2 for the disposal site corresponds to the recessed portion corresponding portion 3A and this recessed portion corresponding. A slope-corresponding portion 3B that is continuously provided around the portion and a slope-corresponding portion 3C that is formed in a part of the slope-corresponding portion.
Of the upper surface is filled with sand and gravel 4, the upper surface of the sand or gravel 4 is stretched double water barrier sheet 5, the upper surface of the double water shield sheet 5 sand and gravel 6 is laid This is a managed final disposal site .
In this case, the leachate confirmation suction device 10 arranged on the upper surface of the water-blocking sheet 3 has a connecting pipe 10A which is piped in the left-right direction at the rear part of the bottom part 2A and a pipe which is branched from the connecting pipe. A hole guide pipe 10B and a decompression hose 10D connected to the connecting pipe and drawn to the ground are provided, and a detector 10C such as a sensor may be arranged so as to be exposed at a predetermined interval on the lower inner surface of the hole guide pipe. it can. Also,
The bottom portion 2A is formed in a corrugated shape in which a mountain portion 2A2 and a valley portion 2A1 in the front-rear direction are alternately arranged, and the perforated guide tube 10B can be piped along the bottom of the valley portion.

Further, the leachate discharge device 14 is provided with a basin portion 14A provided at the left rear corner of the double waterproof sheet 5.
A left perforated discharge pipe 14B drawn out in a plane L-shape from the slab, a rear perforated discharge pipe 14C, and a left perforated discharge pipe and a rear perforated discharge pipe. A central perforated discharge pipe 14D that is obliquely drawn in the middle, and a left branch perforated discharge pipe 14B that is drawn from the left perforated discharge pipe 14B.
1, the rear branch perforated discharge pipe 14C1 drawn out from the rear perforated discharge pipe 14C, and the sill portion 14A are connected to a cauldron 14E provided in a state of being embedded in the rear slope 2B, A drainage pump 14F is provided in the shuttle 14E .
In addition, old tires 13 can be piled up on the slopes 2B on the front, rear, left, and right sides of the hollow portion 2 for the landfill so as to lean against the required height from below.

[0008]

An embodiment will be described with reference to the drawings. The management type final disposal site management method as the first invention is configured as follows. Lower layer water-permeable sheet stretched over the bottom of the depression for the repository, sand and gravel filled on the upper surface of this lower layer water-permeable sheet, and upper layer water-permeable sheet stretched on the upper surface of this sand or gravel. In a managed final disposal site consisting of and, when the upper water-blocking sheet is damaged, the leachate of waste that has entered sand or gravel through the damaged part is detected by electrical conduction. ing. In this case, if the upper water-blocking sheet is damaged, the leachate of the waste that has entered the sand or gravel through the damaged part should be discharged after detecting the leachate by electrical conduction. You can

Reference numeral 1 is a managed final disposal site of the second invention.
Reference numeral 2 denotes a hollow portion for the disposal site, which is formed by excavating and shaping a desired location of the controlled final disposal site, and a flat rectangular bottom portion 2A having a predetermined size and a continuous installation around the bottom portion. The front and rear left and right slopes 2B are formed, and the slope portion 2C formed on a part of the slope. 2B1 is slope 2
It is a ridge formed around the upper end of B.

Reference numeral 3 denotes a water-blocking sheet stretched on the surface of the recessed portion 2 for the repository, and the recessed portion corresponding portion 3A and the slope corresponding portion 3B continuously provided around the recessed portion corresponding portion,
Slope part corresponding part 3 formed in part of the slope corresponding part 3
C. In this case, the slope corresponding portion 3B
The upper side portion 3B1 covers the projecting edge 2B1 of the slope 2B, and the upper side portion is a pressing pipe 3D that is pressed from the outside.
It is fixed by an anchor 3D1 which fixes this presser pipe. 3E is an embankment that presses the upper side portion 3B1, the pressing pipe 3D, the anchor 3D1 and the like from the outside.

Reference numeral 4 is sand or gravel filled with a predetermined thickness on the upper surface of the recessed portion corresponding portion 3A of the water-blocking sheet 3. Reference numeral 5 is a double waterproof sheet stretched over the upper surface of the sand or gravel 4, and the outer peripheral edge 5A is a slope-corresponding portion 3 of the waterproof sheet 3.
It is glued to B. Reference numeral 6 is sand or gravel laid on the upper surface of the double waterproof sheet 5. Reference numeral 7 denotes a storage portion for the buried object 8 which is configured by being surrounded by the upper surface of the sand or gravel 6 and the slope-corresponding portion 3B of the water-blocking sheet, and 8A denotes an upper edge of the buried object to be buried,
9 shows the upper edge of the soil cover 9A, respectively.

Reference numeral 11 is a managed final disposal site of another embodiment. Reference numeral 2 denotes a hollow portion for the disposal site, which is formed by excavating and shaping a desired location of the controlled final disposal site, and a flat rectangular bottom portion 2A having a predetermined size and a continuous installation around the bottom portion. The front and rear left and right slopes 2B are formed, and the slope portion 2C formed on a part of the slope. further,
The bottom portion 2A is formed in a corrugated shape in which front and rear peak portions 2A2 and valley portions 2A1 are alternately arranged. 2B1 is a projecting edge formed around the upper end of the slope 2B.

Reference numeral 3 denotes a water-blocking sheet stretched on the surface of the recessed portion 2 for the repository, and the recessed portion corresponding portion 3A and the slope corresponding portion 3B continuously provided around the recessed portion corresponding portion,
Slope part corresponding part 3 formed in part of the slope corresponding part 3
C. In this case, the slope corresponding portion 3B
The upper side portion 3B1 covers the projecting edge 2B1 of the slope 2B, and the upper side portion is a pressing pipe 3D that is pressed from the outside.
It is fixed by an anchor 3D1 which fixes this presser pipe. 3E is an embankment that presses the upper side portion 3B1, the pressing pipe 3D, the anchor 3D1 and the like from the outside.

Reference numeral 10 is a leachate confirmation suction device arranged on the upper surface of the water-blocking sheet 3, which is a connecting pipe 10A piped in the left and right direction at the rear portion of the bottom portion 2A, and a valley portion 2A1 in a branched state from this connecting pipe. Perforated guide tube 10 piped along the bottom of the
B and decompression hose 1 connected to the connecting pipe and pulled out to the ground
It is composed of 0D. In this case, a detector 10C such as a sensor is arranged so as to be exposed at a predetermined interval on the inner surface below the perforated guide tube. 10C1 is an electric wire connected to the detector and is drawn to the ground. Reference numeral 10C2 is a control box that houses a device (not shown) for checking the leachate and setting it so that it can be detected by, for example, an indicator light or an alarm.

Reference numeral 4 is sand or gravel filled with a predetermined thickness on the upper surface of the recessed portion corresponding portion 3A of the water-blocking sheet 3. Reference numeral 5 is a double waterproof sheet stretched over the upper surface of the sand or gravel 4, and the outer peripheral edge 5A is a slope-corresponding portion 3 of the waterproof sheet 3.
It is glued to B. Reference numeral 6 is sand or gravel laid on the upper surface of the double waterproof sheet 5. Reference numeral 7 denotes a storage portion for the buried object 8 which is configured by being surrounded by the upper surface of the sand or gravel 6 and the slope-corresponding portion 3B of the water-blocking sheet, and 8A denotes an upper edge of the buried object to be buried,
9 shows the upper edge of the soil cover 9A, respectively.

Reference numeral 12 is a managed final disposal site of another embodiment. Reference numeral 2 denotes a hollow portion for the disposal site, which is formed by excavating and shaping a desired location of the controlled final disposal site, and a flat rectangular bottom portion 2A having a predetermined size and a continuous installation around the bottom portion. The front and rear left and right slopes 2B are formed, and the slope portion 2C formed on a part of the slope. further,
The bottom portion 2A is formed in a corrugated shape in which front and rear peak portions 2A2 and valley portions 2A1 are alternately arranged. 2B1 is a projecting edge formed around the upper end of the slope 2B.

Reference numeral 3 is a water-blocking sheet stretched on the surface of the recessed portion 2 for the repository, and the recessed portion corresponding portion 3A and the slope corresponding portion 3B continuously provided around the recessed portion corresponding portion,
Slope part corresponding part 3 formed in part of the slope corresponding part 3
C. In this case, the slope corresponding portion 3B
The upper side portion 3B1 covers the projecting edge 2B1 of the slope 2B, and the upper side portion is a pressing pipe 3D that is pressed from the outside.
It is fixed by an anchor 3D1 which fixes this presser pipe. 3E is an embankment that presses the upper side portion 3B1, the pressing pipe 3D, the anchor 3D1 and the like from the outside.

Reference numeral 10 denotes a leachate confirmation suction device provided on the upper surface of the water-blocking sheet 3, which is a connecting pipe 10A piped in the left-right direction at the rear portion of the bottom portion 2A, and a valley portion 2A1 in a branched state from this connecting pipe. Perforated guide tube 10 piped along the bottom of the
B and decompression hose 1 connected to the connecting pipe and pulled out to the ground
It is composed of 0D. In this case, a detector 10C such as a sensor may be arranged so as to be exposed on the inner surface below the perforated guide tube at a predetermined interval. 10C1 is an electric wire connected to the detector and is drawn to the ground.

Numeral 4 is sand or gravel filled with a predetermined thickness on the upper surface of the recessed portion corresponding portion 3A of the water-blocking sheet 3. Reference numeral 5 is a double waterproof sheet stretched over the upper surface of the sand or gravel 4, and the outer peripheral edge 5A is a slope-corresponding portion 3 of the waterproof sheet 3.
It is glued to B. Reference numeral 6 is sand or gravel laid on the upper surface of the double waterproof sheet 5. Reference numeral 7 denotes a storage portion for the buried object 8 which is configured by being surrounded by the upper surface of the sand or gravel 6 and the slope-corresponding portion 3B of the water-blocking sheet, and 8A denotes an upper edge of the buried object to be buried,
9 shows the upper edge of the soil cover 9A, respectively.

Reference numeral 14 denotes a leachate discharge device, which is a basin portion 14A provided at the left rear corner of the double water-blocking sheet 5 and a left-side perforated drain pipe 14B drawn out in a plane L shape from the basin portion.
And a rear perforated discharge pipe 14C, a central perforated discharge pipe 14D that is obliquely drawn out between the left perforated discharge pipe and the rear perforated discharge pipe, and a left perforated discharge pipe. A left branch holed discharge pipe 14B1 drawn from the discharge pipe 14B,
The rear branch perforated discharge pipe 14C1 pulled out from the rear perforated discharge pipe 14C and the sill portion 14A are connected to a shuttle place 14E provided in a state of being embedded in the rear slope 2B. 1
And it is configured to provide a drainage pump 14F is in 4E.

In addition, the configuration is as follows. 1. Sand, gravel, etc. cast in the so-called intermediate layer between the upper and lower layers of the water-blocking sheet should be small sand or gravel with no corners near the sheet surface of the upper and lower layers, and stones between these small sands or gravel. Or large pebbles will do. 2. For the perforated guide tube, the area of the perforated guide tube is lowered and both of them are inclined high in order to ensure that the leachate collects. 3. Laying the perforated guide pipe is done in a groove or depression with the size of the perforated guide pipe so that the leachate can flow in efficiently.
It is configured to enhance the detection effect of leachate. this
In this case, the interval and the number of guide pipes are the maximum depending on the size of the disposal site.
Decide on a suitable condition.

4. The suction hole of the perforated guide tube must be blocked with sand or gravel, or sand or gravel must be prevented from entering the tube. In some cases, it can be protected with a non-woven fabric or the like. 5. The number of perforated guide tubes and the number of detectors depend on the size of the final disposal site, and the ease of repair work for damage to the waterproof sheet,
It may be decided according to the cost. 6. It is also possible to make contact between the tip of the perforated guide tube and the side of the connecting tube, or between the detector and the detector to make the contact of the leachate with the detector efficient.

7. The detection part of the detector by the electric conduction method is attached to the bottom part of the perforated induction tube, and the width between the electrodes such as platinum is made as small as possible to improve the detection efficiency, but the influence of dust and contaminants is minimized. Reduce the interval . Although the electric conduction method has been taken as an example of the leachate detector here, the method is not limited to this, and other methods such as infrared rays or high frequencies, and various other methods for detecting leachate are also included. . This
In the case of, the intervals between detectors and the number of detectors depend on the size of the disposal site.
Decide jar'll become an optimal state. 8. With reference to FIG. 2, the old tires 13 are piled up diagonally along the water-blocking sheet on the slope with a required height and interval, and it is not necessary to provide a fixed portion. That is, when the waste is landfilled, it is protected by old tires so that the water impermeable sheet on the slope does not come into contact with the rolling compactor when it is moved by the compaction heavy machine. In this case, this old tire can be used by being sequentially transferred so as to be installed in the moving range of the compaction heavy machine.

The operation and the effect will be described.

[0025]

Since the present invention is configured as described above, it has the following effects. 1. When the upper layer of the double-layer waterproof sheet is damaged and the leachate of the waste material leaks, the purpose is to detect the damage of this waterproof sheet immediately. It is possible to guide the leachate to a perforated guide tube that sucks the decompressed water under reduced pressure, detect the leachate with a detector installed in the perforated guide tube, and efficiently find the damaged part of the impermeable sheet around this detector. it can. 2. Further, even if leachate leaks due to breakage of the upper water-blocking sheet, the lower water-blocking sheet can prevent penetration into the underground. 3. When displacing waste with land compaction equipment, it is possible to protect it with old tires so that it will not come into contact with the water barrier sheet on the slope and be damaged when it is moved by a compaction heavy machine. 4. The water shield sheet has a predetermined double structure to prevent groundwater from being contaminated due to leakage of leachate, and the inside of the guide pipe is constantly depressurized and sucked by a vacuum pump or the like. If the upper layer of the water-blocking sheet is damaged, the location of the water-blocking sheet in the repository can be immediately identified by the intrusion of waste leachate, the indicator light of the detector, or the alarm. However,
Although the size of the area to be dug by the number of perforated guide tubes and the number of detectors can be known, the damaged part of the water shield sheet was found and repaired, including the removal of water from the perforated guide tube. Return to and continue to manage the damage to the water barrier sheet.

[Brief description of the drawings]

FIG. 1 is a perspective view of a second invention.

FIG. 2 is a sectional view taken along line AA.

FIG. 3 is an enlarged perspective view of a main part with a part cut away in a state of an upper portion of the water-blocking sheet.

FIG. 4 is a perspective view of another embodiment.

FIG. 5 is a sectional view taken along line BB.

FIG. 6 is an enlarged perspective view of a main part with a part of a perforated guide tube portion cut away.

FIG. 7 is an enlarged vertical sectional view of an essential part of a bottom portion.

FIG. 8 is an enlarged perspective view of an essential part of a bottom portion.

FIG. 9 is an enlarged perspective view of a main part with a part cut away in a state of an upper portion of the water-blocking sheet.

FIG. 10 is a perspective view of another embodiment.

FIG. 11 is a sectional view taken along line CC.

FIG. 12 is a sectional view taken along line DD.

FIG. 13 is an enlarged perspective view of an essential part of a bottom portion.

FIG. 14 is an enlarged perspective view of a main part with a part of a perforated guide tube portion cut away.

FIG. 15 is an enlarged vertical sectional view of an essential part of a bottom portion.

FIG. 16 is an enlarged perspective view of an essential part with a part cut away in the state of the upper part of the water-permeable sheet.

FIG. 17 is a schematic perspective view of a depression part for a repository.

[Explanation of symbols]

1,11,12 Controlled final disposal site 2 Recessed site depression 3 Water barrier sheet 4,6 Sand and gravel 5 Double water barrier sheet 10 Leachate confirmation suction device 14 Leachate discharge device 13 Old tire

Claims (7)

(57) [Claims] 1. A lower layer waterproof sheet stretched over the bottom of a depression for a repository, sand or gravel filled on the upper surface of the lower waterproof sheet, and stretched over the sand or gravel. In a managed final disposal site consisting of an upper layer impermeable sheet, if the upper layer impermeable sheet is damaged, the leachate of the waste that has entered the sand or gravel through the damaged part can be removed by electrical conduction. A method for managing a managed final disposal site, which is characterized by detecting. 2. When the upper water-blocking sheet is damaged, the leachate of the waste that has entered the sand or gravel through the damaged part is detected after the leachate is detected by electrical conduction, and then the drain is discharged. The method for managing a managed final disposal site according to claim 1. 3. A recessed part (2) for a disposal site, which is formed by excavating and shaping a desired location of a managed final disposal site.
Is a flat rectangular bottom (2A) configured to have a predetermined size,
Front, rear, left and right slopes (2B) that are connected around this bottom
And a slope part (2C) formed on a part of the slope, and the water-impervious sheet (3) stretched on the surface of the recessed part (2) for the repository is the part corresponding to the recessed part ( 3A),
The water barrier sheet (3) includes a slope-corresponding portion (3B) continuously provided around the recess-corresponding portion and a slope-corresponding portion (3C) formed in a part of the slope-corresponding portion.
Sand and gravel (4) are filled on the upper surface of the recessed portion corresponding part (3A) in the above , and double water-impervious sheet (5) is stretched on the upper surface of the sand and gravel (4), and double water-impermeable sheet Management characterized by sand and gravel (6) being laid on the upper surface of (5)
Type final disposal site . 4. The leachate confirmation suction device (10) arranged on the upper surface of the water-impervious sheet (3) comprises a connecting pipe (10A) piped in the left-right direction at the rear part of the bottom part (2A), Perforated induction pipe (10B) piped in a branched state from the connection pipe
And a decompression hose (1
0D), and a detector (10) such as a sensor so that it is exposed at a predetermined interval on the lower inner surface of the perforated guide tube.
The controlled final disposal according to claim 3, wherein C) is provided.
Place . 5. The bottom portion (2A) is a mountain portion (2A) in the front-rear direction.
The management-type final disposal site according to claim 4, wherein the management type final disposal site has a corrugated shape in which 2) and a valley portion (2A1) are alternately arranged, and a perforated guide pipe (10B) is provided along the bottom of the valley portion. 6. The leachate discharge device (14) comprises a basin (14) provided at a left rear corner of the double water-blocking sheet (5).
A), a left-side perforated discharge pipe (14B) drawn out in a plane L-shape from the basin, a rear-side perforated discharge pipe (14C), and these left-side perforated discharge pipes and the rear. The central perforated discharge pipe (14
D), the left branch perforated discharge pipe (14B1) drawn from the left perforated discharge pipe (14B), and the rear branch perforated discharge drawn from the rear perforated discharge pipe (14C) Tube (14C
1) and the sill part (14A) are connected to a cauldron (14E) provided in a state of being buried in a rear slope (2B), and a drainage pump (14F) is provided in the cauldron (14E ). Is provided
Managed final disposal of claim 4 or claim 5, wherein there
Place . 7. The method according to claim 4, wherein old tires (13) are piled up so as to lean against a required height from below on front, rear, left and right slopes (2B) of the depression (2) for the repository. Management type final disposal site described in any of.