JPH08257528A - Waste landfill method - Google Patents

Abstract

PURPOSE: To secure a site easily and to enable hygienic, economical disposal of a large amount of waste by forming covering earth by dumping waste into a unit landfill pit blocked by a roof body, performing landfill, and damping waste similarly by moving the roof body in sequence. CONSTITUTION: A earth holding wall 3 is formed by installing a parallel steel pipe sheet pile 2, and a pre-preparation block is dug which is partitioned by a wall consisting of a steel pipe sheet pile 4 for partition to build a first unit landfill pit 5. A mobile roof body 8 is installed on the pit 5. Waste 6 is dumped into the pit 5 which is shut off from the outside by the roof body 8 and both steel pipe sheet piles 2, 4, and covering earth is formed to finish the landfill. After the roof body 8 being installed on the first unit landfill pit 5, a block of the second unit landfill pit is dug. The roof body 8 is moved onto the second unit landfill pit, waste 6 is dumped. The processes are implemented in sequence to dump waste 6 into unit landfill pits for disposal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to non-combustible materials such as separated garbage, bulky garbage and the like discharged from ordinary households and incinerated ash, dust ash and sludge discharged from public facilities to lakes, rivers, bays and the like. The present invention relates to a method of landfill disposal of waste that is dumped on the shore or land to be landfilled.

[0002]

2. Description of the Related Art Generally, there are waste disposal methods such as incineration, landfill, biochemical treatment, etc. In the case of landfill, when the waste is extensively disposed on a flat land such as a field, maintenance is performed. The land was leveled by leveling, and the site after the leveling was greened to construct a facility such as a park.

However, in such a method, it is necessary to secure a wide land for discarding waste in a flat area, and there is a shortage of suitable land in the suburbs of an urban area where a large amount of waste is discharged. There is a problem in that the waste must be transported and the transportation cost increases. In addition, since the waste that is being landfilled is exposed to the open air, there is a bad smell near the landfill, and the waste is scattered around due to the effects of wind and birds and animals, making it unsanitary and creating a neighborhood scenery. There was a problem of damage.

Therefore, Japanese Patent Laid-Open No. 2-95489 discloses that
The planned landfill site is divided into unit work sections, a roof sheet is installed in the unit work section, and a net for bird protection is suspended on the front and back space surfaces of this roof sheet. A final disposal method for waste disposal work to be relocated to is proposed.

[0005]

In the above-mentioned final disposal method, the bird-preventing ami can prevent birds from coming in, but the odor of waste cannot be prevented from leaking. Rain invades into the central construction area, and the rain that invades this garbage becomes sewage, increasing the amount of sewage treated,
If the impermeable treatment becomes insufficient, the sewage may flow into the nearby watershed.

Furthermore, after reclaiming one work section, the roof sheet and the like must be removed and erected in the next work section, which is inferior in workability associated with roof relocation.

Further, the above-mentioned final disposal method has a problem that it is necessary to secure a planned landfill site in which a relatively large depression is formed, and a large amount of waste is sanitarily landfilled in the suburbs of urban areas. It is expected that it will be difficult to secure a site that can be used.

[0008] Therefore, the present invention, rain invasion, leakage of stench,
Waste that can be landfilled in a sanitary manner by preventing scattering of waste, is relatively easy to secure a site, can process a large amount of waste in a sanitary manner, and has excellent economical efficiency The landfill disposal method is provided.

[0009]

The gist of the present invention will be described with reference to the accompanying drawings.

The planned landfill site before the landfilling by discarding the waste is divided into a plurality of unit landfill pits arranged from the starting point side to the ending point side, and the starting point side section is formed. To form a unit landfill pit, cover the upper part of the unit landfill pit and close the unit landfill pit to form a roof body that moves to the end point side of the unit landfill pit. While discarding waste in the unit landfill pit,
A unit landfill pit on the end point side adjacent to this unit landfill pit is created to form a unit landfill pit, and soil is deposited on the waste dumped in the unit landfill pit covered with the roof body. After providing and landfilling, the roof body is moved to be positioned on the unit landfill pit on the adjacent end point side, and the landfill pits are continuously discarded while repeating the landfill with the waste and the soil. The present invention relates to a waste landfill treatment method, which is characterized in that it is formed on a landfill site.

Further, the planned landfill site is divided, and the area is excavated to form a landfill pit. An earth retaining wall is provided around the landfill pit to conceal the upper part and the periphery of the landfill pit. Provide a roof body of a size that allows it to be moved without disassembling it, and provide an entry / exit section for transporting vehicles such as dump trucks to this roof body, dump waste into the landfill pit, and cover soil. After the installation, the roof body is moved to the landfill pit formed next to excavate the landfill pit, and waste is dumped into the landfill pit to continuously provide cover soil. It relates to the waste landfill treatment method.

[0012]

[Operation and effect of the invention] In a unit landfill pit closed by a roof, waste is dumped and soil is provided on top of the waste for landfilling, and adjacent unit landfill pits are constructed. Then, the roof body is moved in sequence and the waste is dumped and the unit landfill pits are constructed in the same way.

Since the present invention is configured as described above, it is relatively easy to secure a land, sanitary treatment of a large amount of waste is possible, and waste disposal method is excellent in economic efficiency. Can be provided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 to 10 show an embodiment of the present invention. On both sides of a planned landfill site 1 before construction by excavation, self-supporting soil, which is a wall by steel pipe sheet piles 2 which are cast in parallel in advance. The retaining wall 3 is formed and the landfill site 1
Is, for example, one section is a flat surface of 50 m × 5 due to a plurality of section steel tube sheet piles 4 which are walls cast between the steel tube sheet piles 2 and 2.
0m unit landfill pits 5C, 5C, 5, 5A,
It is divided into 5B divisions side by side from the start point side to the end point side. That is, the left side in FIG. 1 is the start point side, and the right side is the end point side.

Although not shown, it is also possible to excavate the planned landfill site by open excavation without using the earth retaining wall 3 to form a section by a section plate which becomes an appropriate wall.

In FIG. 1, 5C is a unit landfill pit after landfill, and 5 is the earth retaining wall 2 and a steel pipe sheet pile for partitioning, which are walls having the same height on all four sides formed by excavating the partitioning. Unit landfill pit in landfill surrounded by 4 and 5
A is the second unit landfill pit being constructed by excavation, 5B
Shows the third unit landfill pit before construction by excavation. In addition, R is a lake. E is the bottom of the landfill pit 5, and the soil is improved by the consolidation method.

The unit landfill pit 5 in which the waste 6 is being landfilled is constructed by excavating, for example, to a depth of 10 m, and as shown in FIG. 3, the bottom portion and the surfaces of the steel pipe sheet piles 2 and 4 are shielded. A water sheet 7 is provided to block the inside of the landfill pit 5 to prevent leakage of the leachate W from the waste 6 to the outside and intrusion of groundwater (not shown) from the outside.

Reference numeral 8 denotes a movable roof body which covers and closes the upper part of the unit landfill pit 5, and a waterproof film body 10 is provided on an arched frame structure 9 made of steel or the like.
Also, a waterproof membrane 10 is provided between the steel pipe sheet pile 4 on the starting side and the ending side of the unit landfill pit 5.

Further, at the lower part of the roof body 8, there are provided leg portions 11 installed on the both steel pipe sheet piles 2 and 4.

The film body 10 is semitransparent so that natural light can be collected in the landfill pit 5. As shown in FIG. 4, a traveling rail 12 is laid on the earth retaining wall 3 made of the steel pipe sheet piles 2 provided in parallel, and a plurality of wheels 13 are provided on the leg portion 11 corresponding to the traveling rail 12. The wheel 13 is pivotally attached to the lower part of the elevating member 14 so as to be rotatable.
It is provided so that it can be moved up and down by a hydraulic jack 15 as an elevating device provided on the upper part of the lower part of the leg portion 11 to advance.

An airtight member 16 made of hard rubber or the like is provided below the leg portion 11.

At the side of the roof body 8, there is provided a waste dumping port 17 as an entrance / exit part, and a vehicle entry part 18 is provided integrally with the roof block 8 so as to cover the dumping port 17. A waste transport vehicle 19 such as a dump truck enters the vehicle entry section 18 and throws the waste 6 into the unit landfill pit 5 through the dumping port 17.

An opening / closing door 20 is provided at the dumping port 17, and the opening / closing door 20 is pivotally attached to the roof 8 side and is opened / closed by a hydraulic jack 21 connected to the rear surface.

The vehicle entry portion 18 is composed of a bottom portion 22 and a substantially arch-shaped roof portion 23. When the wheels 13 of the movable roof body 8 are lowered, the vehicle entry portion 18 can move up integrally with the roof body 8. it can.

As shown in FIG. 5, an air blowout port 24 is provided above the dumping port 17, and the air blowout port 24 is provided by a compressor or a blower not shown.
Air is blown out from.

Since the unit landfill pit 5 treats the leachate W discharged from the waste 6, the unit landfill pit 5 has a collection / drainage pipe 25 at the bottom thereof as shown in FIGS. 6 and 7. The discharge and drain pipe 25 is connected to the discharge pit 27 and the other end is closed to form a unit landfill pit by a small hole (not shown) formed in the drain and discharge pipe 25. The leachate W in 5 is collected.

The leachate W accumulated in the water collecting pit 27 is pumped by an underwater pump 28 and is sent to a water treatment facility 30 through a water conduit 29 for treatment.

In the unit landfill pit 5, a plurality of gas vent pipes 31 are disposed in the waste 6 as shown in FIG. 8 in order to process gas (not shown) generated from the waste 6 in the landfill. Stand upright, the upper end of this gas vent pipe 31 is a detachable joint
The connecting pipe 33 is connected via 32, and the connecting pipe 33 is piped along the girder material 34 of the frame structure 9, and the gas collected through the connecting pipe 33 is purified by the gas purifying device 35. And then exhausted from the discharge pipe 35A.

When the amount of landfilled waste 6 reaches a specified amount, the exhaust pipe 36 is connected to the upper end of the gas vent pipe 31 left after the joint 32 is removed, as shown in FIG. After the soil 6 is covered with the soil 6, the gas generated from the waste 6 is discharged to the outside.

As shown in FIG. 10, a plurality of sprinklers 38 made up of sprinklers are provided under the girder 34 of the roof body 8 as shown in FIG.
Are provided, and these are connected to a water supply pipe (not shown), and water can be sprayed in the unit landfill pit 5 by a pump device (not shown) or the like.

Further, the roof body 8 is provided with a plurality of fire extinguishing devices 39 for irradiating CO ₂ .

Reference numeral 40 denotes a working vehicle such as a bulldozer and a landfill compactor for laying the landfilled waste 6 and rolling it. The control is provided on the roof 8 by an unmanned remote control. Operated by remote control from room 41.

Next, the method of landfilling waste according to the present invention will be described.

First, the unit landfill pits before being constructed are formed by excavating the parallel steel pipe sheet piles 2 to form the earth retaining wall 3 and the wall made up of the partition steel pipe sheet piles 4. Build a unit landfill pit 5.

Then, the movable roof body 8 is installed on the first unit landfill pit 5.

The roof 8 and the steel pipe sheet piles 2,
Waste 6 is placed in the first unit landfill pit 5 which is shielded from the outside by 4, and landfilling is carried out. Landfilling to almost the same height The landfilling of the first unit landfill pit 5 is completed.

The cover soil 37 uses part of the soil excavated from the third unit landfill pit 5B before excavation, which is the end point side.

Further, after the roof body 8 is installed in the first unit landfill pit 5, the section of the second unit landfill pit 5A adjacent to the end point side is excavated for construction. After the landfill of the first unit landfill pit 5 is completed, the roof body 8 is moved to the second unit landfill pit 5A and the waste material 6 is landfilled. The process is performed in order, and waste 6 is stored in each unit landfill pit 5, 5A, 5B.
The landfill is processed. Furthermore, during the landfilling of the second unit landfill pit 5A, the soil on the soil 37 of the first unit landfill pit 5 that has been completely landfilled is greened, and as shown in the unit landfill pit 5C shown in FIG. Construction of P or parking lot Q etc.

As described above, in the present embodiment, a plurality of unit landfill pits 5C arranged from the start point side to the end point side by partitioning the planned landfill site 1 before landfilling by discarding the waste material 6,
5C, 5, 5A, and 5B sections are formed, and the section on the starting point side is formed and surrounded by a self-supporting earth retaining wall 3 and a plurality of section steel pipe sheet piles 4 that are walls of approximately the same height on all four sides. The unit landfill pit 5 is formed, and the unit landfill pit 5 is closed by covering the upper part of the unit landfill pit 5.
The roof body 8 that moves toward the end point side of the roof body 8 is formed, and the waste 6 is dumped in the unit landfill pit 5 under the roof body 8 and
A unit landfill pit 5A section adjacent to the unit landfill pit 5 is formed in the same manner as described above to form a unit landfill pit 5A, which is dumped in the unit landfill pit 5 covered with the roof body 8. After covering the waste 6 with soil 37 on the same level as the self-supporting earth retaining wall 3 and the plurality of partition steel pipe sheet piles 4, the roof body 8 is moved to adjoin the unit landfill on the end point side. This is a method in which a unit landfill pit is formed on a continuous landfill of waste by repeating the landfill with waste 6 and soil 37 in succession as the landfill progresses. Since the roof body 8 is sequentially moved, and the waste 6 is buried in the unit landfill pit 5 which is surrounded by walls of approximately the same height on all sides and is constantly shielded from the outside by the roof body 8, Leakage of odor to the outside and scattering of waste 6 are prevented, The waste can be landfilled biologically, and since the roof body 8 prevents rainwater from entering the unit landfill pit 5, the amount of the leachate W to be treated is small, which results in the wastewater. It is possible to prevent it from flowing into nearby watersheds.

Further, by constructing the unit landfill pit 5 surrounded by walls of approximately the same height on all sides, a large amount of waste 6 can be sanitarily landfilled in a land smaller than the conventional one. Therefore, the land can be secured in the suburbs of the city, etc., and the transportation cost of the waste 6 can be reduced.

Since the waste 6 does not come into direct contact with the outside world, the landfill can be sanitarily carried out and the waste 6 in the unit landfill pit 5 cannot be seen from the outside, so that the surrounding landscape can be improved. There is no loss.

Further, since it is possible to prevent birds and animals from entering the unit landfill pit 5 during landfill, the waste 6 is not scattered by the birds and animals and is sanitary.

Further, as an effect of the embodiment, the cover soil 37 provided on the upper portion of the waste 6 uses a part of the soil formed by excavating the section on the end point side, so that the excavated soil is discarded. Transportation costs can be reduced.

Furthermore, after the landfill is completed, it is possible to successively use greening or the like to use the site.

Further, in this embodiment, the unit landfill pits 5C, 5C, 5, 5A, 5B are formed on both sides of the unit landfill pits 5C, 5C, 5, 5A, 5B along the adjoining direction. Since it is provided with the laid traveling rail 12 and the wheels 13 provided on the lower portion of the roof body 8 and traveling along the traveling rail 12, after the landfilling of the unit landfill pit 5 is completed, The roof body 8 can be easily moved onto the adjacent unit landfill pit 5A through the wheels 13, and after the movement, the roof body 8 invades rainwater, leaks odors, and wastes 6.
It is possible to dispose of the waste 6 in the unit landfill pit 5A while preventing the scattering of the waste and to sanitarily perform landfill.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the present invention. For example, as shown in FIG. 11, a steel pipe sheet pile 2 that is a third wall in parallel with the steel pipe sheet piles 2 and 2 provided in parallel.
Unit A is placed and a steel pipe sheet pile 4A for partitioning is placed between the steel pipe sheet piles 2 and 2A to form a unit landfill pit 5B.
May be provided in a two-row grid pattern. In this case, the central steel pipe sheet pile 2 can be commonly used as the earth retaining wall 3 of the upper and lower unit landfill pits, resulting in excellent equipment efficiency.

Further, the unit landfill pit is not limited to two rows, but three
It can also be provided in a grid pattern such as rows, 4 rows.

Further, in the present embodiment, the case where the planned landfill 1 is set on the shore of the lake R is shown.
It is also possible to select an appropriate place not only on the shore such as lakes, rivers and coasts but also on land.

Further, the bottom of the excavated landfill site 1 does not have to be improved in soil by a consolidation method or the like.

[Brief description of drawings]

FIG. 1 (A) is a cross-sectional view of a landfill of this embodiment, (B).
Is a plan view of the same.

FIG. 2 is a cross-sectional view showing a landfill pit during landfill according to the present embodiment.

FIG. 3 is an explanatory diagram of a main part of this embodiment.

FIG. 4 is a cross-sectional view of a main portion showing a leg portion of the roof body according to the present embodiment.

FIG. 5 is a cross-sectional view showing the area around the waste dumping port of the present embodiment.

FIG. 6 is an explanatory diagram of a main part showing the area around the water collection and drainage pipe of the present embodiment.

FIG. 7 is an explanatory diagram of the present embodiment.

FIG. 8 is an explanatory diagram showing a landfill pit during landfill according to the present embodiment.

FIG. 9 is an explanatory diagram showing a landfill pit after landfill according to the present embodiment.

FIG. 10 is an explanatory diagram showing a landfill pit during landfill according to the present embodiment.

FIG. 11 is a plan view showing another embodiment.

[Explanation of symbols]

 1 Land reclamation site 2, 2A Steel pipe sheet pile 3 Earth retaining wall (wall) 4, 4A Section steel pipe sheet pile (wall) 5, 5A, 5B, 5C Unit landfill pit 6 Waste 8 Roof 12 Running rail 13 Wheel 37 Soil cover

Claims (2)

[Claims] 1. A landfill site before landfilling by discarding waste is partitioned to form a plurality of unit landfill pits arranged from the start point side to the end point side, and the section on the start point side is formed. A unit landfill pit is formed to form a roof body that covers the upper part of the unit landfill pit, closes the unit landfill pit, and moves to the end side of the unit landfill pit. While discarding the waste in the lower unit landfill pit, a unit landfill pit is formed by forming a unit landfill pit section on the end point side adjacent to this unit landfill pit,
After covering the waste dumped in the unit landfill pit covered by the roof body with landfill, the roof body is moved and positioned on the unit landfill pit on the adjacent end point side, A method for landfilling waste, wherein unit landfill pits are formed in a continuous landfill of waste while repeating the landfill with the waste and soil. 2. A land reclamation site is divided, an excavation is carried out in the section to form a reclamation pit, and an earth retaining wall is provided around the reclamation pit to conceal the upper part and the periphery of the reclamation pit. Provide a roof body of a size that can be moved without disassembling the roof body, and provide an entrance / exit for the transportation of vehicles such as dump trucks to this roof body, dump waste into the landfill pit, and cover the soil. After the installation, the roof body is moved to the landfill pit formed next to excavate the landfill pit and the waste is dumped into the landfill pit to continuously provide soil. Landfill disposal method for waste.