JP3243726B2 - Simple closed type management type waste disposal site and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art In general, a final disposal site for managed waste, which forms a seepage control sheet with a seepage control sheet, excavates the ground on a slope descending inward with its peripheral edge part inward. A water-impervious sheet is placed on the bottom surface, and leachate collection and
A drain pipe is provided, waste is buried on the drain pipe, an intermediate soil cover layer is provided in the middle of the waste landfill, and a low-permeable clay layer (surface soil) is formed on the intermediate cover layer. On the other hand, several wells for monitoring water quality are provided around the disposal site, and the presence or absence of leached sewage from the disposal site to the groundwater is sampled from the wells.

[0003]

However, the above-mentioned waste disposal site has the following problems. That is,
Since the waste is buried on one side without dividing the place where the waste is to be buried, the load of leachate treatment to the wastewater treatment facility due to rainfall increases at a waste disposal site with a large land area. Also, since the water-impervious sheet is similarly disposed on one side, the water-impervious sheet is easily damaged by ozone, ultraviolet rays, etc.
It is difficult to identify the damaged part in the landfilled part.
In addition, since the waste is buried without dividing the buried place, there is a problem that the waste is buried in the entire buried place and the construction site cannot be used unless the construction is completed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and can reduce the load of inundation treatment on a wastewater treatment facility due to rainfall even in a waste disposal site having a large land area, so that a damaged portion of a seepage control sheet can be reduced. It is an object of the present invention to provide a simple closed-type managed waste disposal site that can be quickly identified and that can be used at an early stage of a landfill site, and a method for forming the same.

[0005]

According to a first aspect of the present invention, there is provided a simplified closed-type managed waste disposal site, wherein a ground is excavated.
The wall around which the landfill area formed by shaving is provided
Adjacent horizontally by surface and partition wall provided inside
Divided into several small landfill areas
Waste is buried in the area, and the wall and
And the partition walls are respectively arranged on the filter layer and its surface.
Consists of a water-impervious sheet to be set, and that these filters
It is characterized in that a drainage pipe for water leakage monitoring is installed in the formation .

According to a second aspect of the present invention, the ground is excavated and buried.
And a plurality of small landfills within the landfill area.
Set up a landfill area and dump waste sequentially into each small landfill area.
Simple closed-type managed waste disposal to landfill
This is a method of building a landfill, and a small landfill before dumping waste
Form a filter layer around and at the bottom of the area
A water-impervious sheet is placed on the surface to form the wall and
A drainage pipe for monitoring water leakage is buried in the filter layer on the wall.
When dumping waste into the small landfill area,
The adjacent small landfill area is formed on an inclined surface,
After dumping of the landfill area is completed, fill the slope
Forming a filter layer and installing a water-impervious sheet on its surface.
And separates the small landfill area from another adjacent small landfill area.
And a filter for the partition wall
Install drainage pipes for water leakage monitoring in the formation, and then
Dump the small landfill area and repeat the above process
And landfill the entire landfill area .

[0007]

According to the simple closed type managed waste disposal site of the first aspect, the area around the landfill area and the bottom of the landfill area can be controlled.
The walls and the partition walls that separate small landfill areas
The filter layer is formed by the filter layer and the impermeable sheet on the surface.
A drainage pipe for monitoring water leakage is provided in these filter layers.
Therefore, if the impermeable sheet is damaged, drainage for water leakage monitoring
The leachate is drained by the pipe. In addition, the safety of the impermeable sheet can be managed by controlling the leachate in the leakage monitoring drain pipe.

[0008] According to the method for constructing a simple closed type managed waste disposal site according to the second aspect of the present invention, the periphery of the landfill area is
While the wall is formed on the enclosure and the bottom, the inside is
While forming the partition wall for partitioning into standing areas, and
When forming these walls and partition walls,
To install drainage pipes for water leakage monitoring in the filter layer
Leachate can be managed independently for each small landfill area
Becomes In addition, by constructing each small landfill area sequentially
Finally, the entire landfill area is created.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a simple closed type controlled waste disposal site according to the present invention. FIG. 1 to FIG. 4 show an embodiment of the simple closed type management type waste disposal site of the present invention. In the figure, reference numeral A denotes a simple closed type managed waste disposal site, and 1 denotes a ground excavated for construction. The ground 1 is excavated on an inclined surface
A reclamation area 2 is formed, whose part is excavated almost horizontally.
The interior of the landfill area 2 has a partition wall 1 provided in an inclined state.
3 (to be described later) and a plurality of small landfill areas B, C, and D
(C and D in the figure are
Planned burial area). Excavation surface 2b of landfill area 2 (surrounding slope
Filter layer 3a is formed on the
The first water impermeable sheet 4a is disposed on the surface, and
Landfill area with luter layer 3a and first impermeable sheet 4a
A wall 3 is formed around the area 2 and at the bottom, and the wall 3
Waste (ie, within each small landfill area)
It has become so.

The upper surface of the waste 5 dumped in the landfill area 2
Is provided with a soil covering layer 6 having a second water-impervious sheet 4b. In the soil covering layer 6, a low water-permeable clay layer 7 is provided on the waste 5, a second water-impervious sheet 4b is provided on the surface of the clay layer 7, and the second water-impervious sheet 4b is provided. A drainage layer 8 having a drainage pipe 8a is provided on the
, A vegetation soil 10 is provided on the filtration layer 9, and a cover soil 11 is provided on the vegetation soil 10. In this configuration, the earth covering layer 6
Is provided so as to block the infiltrated rainwater in front of the second water-blocking sheet 4b and drain it. Meanwhile, each small
Boundary of landfill area (in the figure, boundary 12 of small landfill areas B and C)
The partition wall 13 provided in the small landfill area B
Filter layer 13a provided on the inclined surface of waste 5
And the surface of the filter layer 13a (adjacent small landfill
The third impermeable sheet 4c disposed on the area C side surface).
Is formed. That is, in the above configuration,
Waste is dumped into landfills zone in B 5 is the wall 3, covering soil
Small buried area surrounded by layer 6 and partition wall 13
It is buried in the picture B, the wall surface 3, the earth covering layer 6, the partition wall surface
, Second, and third water-impervious sheets disposed at
4a, 4b, and 4c ensure the water stoppage
It has become.

The filter forming the wall 3
Filter layer forming the inside of the layer 3a and the partition wall surface 13
In the 13a, perforated water leakage monitoring drainage pipes 14 are arranged in a substantially lattice shape in plan view. This leakage monitoring drainage
The first water-impervious sheet 4a and the third water-impervious sheet are formed by the pipes 14.
If the water sheet 4c is damaged and the leachate is removed from the filter layer 3
a, 13a, it can be detected when leaching
It has become.

Next, a method of constructing the simple closed type management type waste disposal site A of this embodiment will be described. Ordinary waste does not need to be disposed of in large quantities at one time, but is collected in an amount that requires periodic disposal for a certain period of time. This simple closed type managed waste disposal site A is a disposal site adapted to meet the necessity of the above-mentioned disposal quantitatively for a certain period, and divides the disposal site into a plurality of small landfill areas. Dispose of waste sequentially in the small landfill area.

First, the ground 1 at the site of the landfill site is excavated to form a landfill area 2 and a groundwater drain 1 for groundwater is formed.
5 (one place in the figure) is laid in the ground 1. Next, a small landfill area B is set in the landfill area 2 from the edge 2a of the landfill area 2 and consists of a fixed area in the horizontal direction. Then, a drainage pipe 14 for monitoring leakage is provided on the surface of the excavation surface 2b of the landfill area 2 .
Are arranged in a substantially lattice shape. In this case, the drainage pipe 1
It is preferable to use holes 4 having a diameter of about 100 mm and a diameter of about 50 to 100 mm (determined from the geology of the ground 1, the rainfall of the constructed ground, and the like).

Next, the drainage pipes 14 for monitoring leakage are buried in sand to form a filter layer 3a, and a first layer is formed on the surface thereof.
The wall surface 3 is formed by disposing the water impermeable sheet 4a. Further
The bottom of the inside of the wall 3, that is, the small landfill area B
In, disposing the leachate drainage pipe 16 for discharging leachate leached into the waste 5 ... (one place in the drawing). Further, gas vent pipes 17 (one place in the figure) for discharging gas generated in the waste 5 are arranged along the wall surface 3.

Next, the waste 5 is dumped to a predetermined height at the bottom of the small landfill area B. Here, when burying the waste 5, the small landfill area C side has a gentle slope in consideration of the setting of the small landfill area C which is the next landfill area .

When the dumping in the small landfill area B is completed,
Alternatively, work in parallel with it to form a small landfill area C side
Drainage for monitoring water leakage is provided on the formed slope and the bottom of small landfill area C.
The water pipes 14 are arranged in a substantially lattice shape in plan view. And
These leak monitoring drainage pipes 14 are buried in sand and filled.
And a filter layer 13a and a filter layer 13a.
The first water-impervious sheet 4a and the third water-impervious sheet 4
c respectively, and the bottom and the top in the small landfill area C
The wall surface 3 and the partition wall surface 13 are formed on the inclined surface. small
After burying the waste 5 in the landfill area B to a predetermined height, the covering soil layer 6 is formed on the upper surface of the five layers of the waste, and the burying of the waste 5 in the small landfill area B is completed. In this process stage, the waste 5 dumped in the small landfill area B is
Partitioned from the adjacent small landfill area C by the partition wall 13
It is buried there.

Hereinafter, the same applies to other small landfill areas C and D.
Similarly, dumping of waste 5 and installation of drainage pipe 14 for monitoring water leakage,
Filter layer 3a for the bottom and the inclined surface of the waste,
Wall formed by forming 13a and arranging the impermeable sheets 4a and 4c
3 and the partition wall 13 to form
Complete the configuration.

In the case where the waste 5 is buried in the small landfill area B for a long time, the waste 5 is buried below the small landfill areas C and D which are the next landfill scheduled areas (only the small landfill area C in the figure). ) Small dams 18 and 19 are provided in small landfill areas C and D to drain rainwater so as to reduce the burden of leachate on the water leakage monitoring drain pipes 14.

FIGS. 4A and 4B show the wall surface 3 and the partition.
2 shows details of a wall surface 13 and a management state of leachate in the water leakage monitoring drainage pipe 14. In the embodiment of this figure, a mobile water sampling device 20 is inserted along the water leak monitoring drain pipe 14 so that water can be sampled. The water sampling device 20 collects the leachate in the drainage monitoring drainage pipes 14 arranged in a lattice pattern and regularly inspects the leachate. Even if damage occurs at the position E, it is possible to determine the position based on a change in water quality.

As described above, according to the simple closed type management type disposal site A of this embodiment, the landfill area 2
Layer 3a of wall 3 formed around and at the bottom of the filter
The partition wall formed inside and at the boundary between each landfill area
A drainage pipe 14 for monitoring water leakage is provided in the 13 filter layers 13a.
The leachate can be checked, and the leachate can be checked to control whether there is damage to the seepage control. Therefore, even if the landfill area is large, the leachate drainage pipe 1
By making 6 independent, the burden can be reduced. In addition, leachate can be managed independently for each small landfill area.
Furthermore, since the waste is sequentially dumped for each small landfill section, a filter layer is formed and the land is formed, the landfill site can be used without waiting for the waste to be buried in the entire landfill area of the disposal site.

[0021]

According to the simple closed-type managed waste disposal site and the construction method according to the present invention, the following effects can be obtained. According to the simple closed type managed waste disposal site according to claim 1, the ground is formed by excavating the ground.
Wall with a landfill area around and at the bottom
And the partition wall provided inside
Divided into a plurality of small landfill areas
Waste is buried in the area, and the wall and
The partition walls are respectively provided on the filter layer and its surface
Made of impermeable sheets and their filter layers
A drainage pipe for water leakage monitoring is installed inside, so that the safety of the impermeable sheet can be confirmed, and even at a waste disposal site with a large area, the leachate in the water pipe for water leakage monitoring is managed by managing the leachate. Damaged parts can be quickly identified and corrected for. According to the construction method of the simple closed type management type waste disposal site according to claim 2, the waste disposal site is installed in the landfill area.
Landfills by sequentially dumping waste into designated multiple landfill areas
Before landfilling, small landfill areas
The filter layer and the impermeable sheet around and at the bottom
Drainage pipe for water leakage monitoring in the filter layer with the wall formed
And dumping waste into the small landfill area
When performing, make the adjacent small landfill area side on an inclined surface
After the dumping of the small landfill area is completed,
Forming a partition wall consisting of filter layer and impermeable sheet on the surface
And a drainage pipe for water leakage monitoring in the filter layer
Will be installed in each landfill area.
Each time a discard, wall or partition wall is formed,
The leachate can be managed independently for the standing area , and the site can be used without waiting for the waste to be buried in the entire landfill area of the disposal site.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a simple closed type managed waste disposal site of the present invention.

FIG. 2 is a plan view of a main part of the embodiment.

FIG. 3 is a vertical sectional view of a main part showing details of a soil covering layer of the embodiment.

FIG. 4 is a cross-sectional view of a main part of the disposal site, showing details of a wall surface and a partition wall surface of the embodiment and a state of sampling of leachate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ground 2 Landfill area 2a Edge 3 Wall 3a Filter layer 4a, 4b, 4c Waterproof sheet 5 Waste 6 Covering layer 13 Partition wall 13a Filter layer 14 ... Drainage pipe for water leakage monitoring A Simple closed type management type waste disposal site B, C, D Small landfill area

Claims (2)

(57) [Claims] 1. A landfill area formed by excavating the ground,
Around the wall and the bottom
Small landfills that are horizontally adjacent to each other
And landfill in each small landfill area.
The wall surface and the partition wall surface are
Each filter layer and impermeable sheet provided on its surface
And in their filter layers for water leakage monitoring
A simple closed-type managed waste disposal site that is equipped with a drain pipe . 2. Excavation of the ground to form a landfill area.
First, a plurality of small landfill areas are set in the landfill area,
A simple landfill that sequentially dumps and reclaims waste in landfill areas.
This is a method for creating a rose type managed waste disposal site.
Prior to dumping waste around and at the bottom of a small landfill area.
Form a filter layer on the
To form a wall and a filter layer on the wall
A drainage pipe for water leakage monitoring is buried inside the small landfill area.
When dumping waste into a small landfill area
Side is formed on an inclined surface, and
After the disposal is completed, a filter layer is formed on the inclined surface.
By installing a seepage control sheet on the surface, the small landfill area
Form a partition wall that separates adjacent small landfill areas
And drainage for water leakage monitoring in the filter layer on the partition wall.
Install water pipes and then access adjacent small landfill areas
And then repeat the above process to cover the entire landfill area.
A method for constructing a simple closed-type managed waste disposal site characterized by landfilling waste.