JP2982532B2 - How to landfill waste - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of landfilling waste, and more particularly, to a method of landfilling a waste while dumping the waste above a seepage control sheet laid in the landfill. About.

[0002]

2. Description of the Related Art For example, in a landfill type waste disposal site where industrial waste and general waste are dumped, a seepage control method is used to prevent sewage leaking from the disposal site from penetrating underground and causing environmental pollution. It is mandatory to carry out the work.
As such a waterproofing method, a method of laying a soft synthetic resin-based or rubber-based waterproofing sheet on the bottom surface of a disposal site has conventionally been adopted from the viewpoints of reliability, safety, workability, economy, and the like. I have.

That is, in such a conventional method of landfilling waste, a water-impervious sheet is laid along with a protective mat or the like on the bottom of a waste disposal site, and then the waste is dumped above the water-impervious sheet to form a waste disposal site. Is to be reclaimed one after another.

[0004]

However, in the method of merely burying the waste above the laid water-impervious sheet, the water-impervious sheet may be cut off for some reason, for example, when a sharp substance in the waste is pierced. If the sheet is damaged,
There is a problem that sewage leached through the accumulated waste leaks from the damaged portion to the outside of the disposal site, and contaminates the surrounding environment.

[0005] As a countermeasure for such a problem,
For example, a method has been considered in which two layers of water-impervious sheets are provided, and even if the first-layer water-impervious sheet is torn, leakage of sewage is prevented by the water-impervious sheets of the other layers, and the safety is improved. Such a method merely raises the safety factor to 200%, and thus has a problem that leakage of wastewater generated from accumulated waste cannot be reliably prevented.

Accordingly, the present invention has been made in view of the above-mentioned problems, and prevents leaching of sewage through accumulated waste, so that even if the waterproof sheet is damaged, the sewage is discharged outside the disposal site. It is an object of the present invention to provide a method for landfilling waste, which can easily prevent leakage of waste.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and a gist of the invention is a method of landfilling waste to be dumped at a waste disposal site. A step of dumping a predetermined amount of waste on the upper surface of the water-impervious sheet, and covering the dumped waste with a covering water-impervious sheet, and closely contacting the periphery of the coated water-impervious sheet with the existing water-impervious sheet. Enclosing the predetermined unit amount of waste in a bag formed by the coated impermeable sheet and the existing impermeable sheet; repeating the step of dumping the waste and the step of enclosing the waste And a method of landfilling a waste, wherein the landfill is performed while enclosing the waste in each of the bags formed in a cell shape.

[0008] Further, a method for landfilling waste according to the present invention is as follows.
It is preferable that a suction port is provided in each of the bags, and the landfill is performed while suctioning each bag.

[0009] The predetermined unit amount of the waste enclosed in each of the bags is the amount of the waste to be thrown in daily, the size of the water-impervious sheet covering the dumped waste, the waste disposal site. Is appropriately designed in view of the scale of the system.

[0010]

In the waste landfill method of the present invention having the above-mentioned structure, the waste put in every day is enclosed in the bag body in a predetermined unit amount, for example, for each input amount of waste for one day. The sewage in the waste does not leak out of the bag, and external water such as rainwater is also blocked by the bag and does not pass through the waste, and thus is sealed in the bag. The leaching of wastewater from waste can be easily prevented.

Further, if a suction port is provided in each bag, the sewage can be more reliably prevented from leaking out by burying the bag while checking the sealed state or the broken state of each bag, for example, under vacuum.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic sectional view showing a waste disposal site 10 employing a waste landfill method according to one embodiment of the present invention. That is, the waste disposal site 10 is formed by excavating a vast site in, for example, a mountainous area in a concave shape, and includes a first bottom waterproof sheet 11 on the bottom surface of the concave portion into which the waste H is charged. At the same time that the bottom water shield 12 is constructed, a second bottom water shield 13 is further laid on the upper surface of the bottom water shield 12, and the second bottom water shield 13 is attached to the first existing water shield 16. The waste H is sequentially buried in the cell-shaped bags 14 formed above the waste while enclosing a predetermined unit amount of waste H ′ for one day, for example, which is thrown in every day. .

As shown in FIG. 2, the bottom water shield 12 is made up of a first bottom water shield sheet 11 made of, for example, a soft synthetic resin or rubber-based sheet member. It includes a protection mat 18 made of, for example, a sand mat, which is laid up and down with the water sheet 11 interposed therebetween to protect the water sheet 11, and further provided with a drain pipe or the like as necessary.

Then, the waste H is sequentially buried above the bottom seepage control work 12 composed of the first bottom seepage control sheet 11 by the waste landfill method of this embodiment.
That is, a second bottom water-impervious sheet 13 made of, for example, a soft synthetic resin or rubber-based sheet member is laid on the upper surface of the bottom water-impervious work 12, and this bottom water-impervious sheet 13 is attached to the first existing water-impervious sheet. A predetermined unit amount of the waste H ′ is put and discarded above the sheet 16. Next, the waste H ′ is covered with the covering water-impervious sheet 15, and the periphery of the waste H ′ is adhered to the second bottom water-impervious sheet 13 by welding or an adhesive, so that the existing water-impervious sheet 16 is formed.
2nd bottom impermeable sheet 13 and covering impermeable sheet 1
The waste H ′ is sealed in the bag 14 formed by the steps 5 and 5. Thereafter, the step of dumping the waste and the step of enclosing the waste are repeated using the second bottom water-impervious sheet 13 or the already laid covered water-impervious sheet 15 as the existing water-impervious sheet 16 to form a cell. The wastes H are successively buried while a predetermined unit amount of the wastes H ′ is sealed in each bag body 14.

[0015] From the waste H 'buried in the above-mentioned process, no leaching of wastewater leaking to the outside of each bag 14 occurs. That is, each predetermined amount of waste H
′ Are sealed in the bag 14, and external water such as rainwater is shut off and does not pass through the waste H ′ in the bag 14, so that leaching of wastewater from the waste is easy. Will be prevented.

FIG. 3 shows another embodiment of the waste landfill method of the present invention. That is, in this embodiment, a predetermined unit amount of the waste H ′ is contained in the bag body 14 formed by the existing waterproof sheet 16 and the coated waterproof sheet 15.
When enclosing the bag H, the inside of each bag 14 is sucked through the suction port 17 provided in each bag 14, thereby vacuum-checking the sealing failure or the broken state of each bag 14 to remove the waste H. Landfill is performed. According to such a method,
It is possible to more reliably prevent the infiltration of the wastewater, and to compress each bag body 14 by vacuum suction to reduce the volume of the waste H. Furthermore, if necessary, if each bag body 14 and the ground are connected by a pipe or the like,
The damage of each bag 14 during the landfilling of the waste H can be easily checked, and the damaged bag 14
By injecting, for example, a solidified material or the like through the pipe or the like, the damaged portion can be repaired.

[0017]

As described in detail above, the method for landfilling waste according to the present invention includes a step of dumping a predetermined unit amount of waste on the upper surface of an existing impermeable sheet, and a step of dumping the dumped waste. The step of enclosing in a bag formed by the covered water-impervious sheet and the existing water-impervious sheet is repeated, and landfilling is performed while enclosing waste in each bag formed in a cell shape. Sewage in the waste enclosed in the body does not leak out of each bag, and external water such as rainwater is also blocked by the bag and does not pass through the waste.
Therefore, leaching of sewage from waste in each bag can be easily prevented, and even if the impermeable sheet laid on the bottom of the waste disposal site is damaged, sewage leaks out of the disposal site. Can be easily prevented.

Further, if a suction port is provided in each bag body and landfilling is performed while sucking the inside of each bag body, the sealed state or the broken state of each bag body is checked, for example, by a vacuum check, so that the seepage of sewage is more reliably performed. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a waste disposal site employing a waste landfill method according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing a portion A in FIG. 1;

FIG. 3 is an explanatory view showing another embodiment of the waste landfill method according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 Waste disposal site 11 First bottom impermeable sheet 12 Bottom impermeable sheet 13 Second bottom impermeable sheet 14 Bag 15 Covered impermeable sheet 16 Existing impermeable sheet 17 Suction port 18 Protection mat

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B09B 1/00 E02B 3/12 E02B 3/18 E02D 3/00

Claims (2)

(57) [Claims] 1. A method for landfilling waste dumped at a waste disposal site, comprising the steps of dumping a predetermined unit amount of waste on the upper surface of an existing impermeable sheet; Is covered with a covering water-impervious sheet, the periphery of the covering water-impervious sheet is closely attached to the existing water-impervious sheet, and the predetermined unit amount of waste is disposed in a bag formed by the covering water-impervious sheet and the existing water-impervious sheet. A step of filling the object, and repeating the step of dumping the waste and the step of enclosing the waste, and performing landfilling while enclosing the waste in each bag formed in a cell shape. And how to landfill waste. 2. The bag according to claim 1, wherein a suction port is provided in each of the bags, and the bag is filled while sucking the inside of each bag.
The landfill method for waste as described in.