JP2000343057A - Protective layer in hole for waste disposal and its formation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the need for replacement for a long period of time before a hole for waste disposal is filled with waste. SOLUTION: The protective layer 24 for an impervious sheet 22 covering a base surface 12 of the hole 10 for waste disposal and an inclined plane 14 continuous with the base surface 12 consists of at least bag bodies 26 consisting of one or plural woven fabrics or knitted fabrics arranged on the impervious sheet 22 on the inclined plane 14 and the solid of a slurry which contains aggregate and solidifying material packed into the bag bodies 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective layer for a water-impervious sheet covering a bottom surface and a slope of a waste dumping hole provided in a waste disposal site and a method of forming the same.

[0002]

2. Description of the Related Art In order to prevent harmful substances in dumped waste from seeping into the ground, a water-impervious sheet is installed on the bottom of the waste dumping hole and on the slope connected thereto, In addition, a protection mat made of a nonwoven fabric covering the water-impervious sheet is provided for the purpose of preventing the water-impervious sheet from being deteriorated by ultraviolet rays or wind and rain, and from being damaged when carrying waste or spreading the deposited waste.

[0003] The period until the hole is filled with waste is usually several years or more, during which the protective mat is exposed to ultraviolet rays and wind and rain. Therefore, a part of the protection mat on the slope which is covered by the dumping material later than the bottom of the hole particularly shrinks, or the joint between the protection mats peels off. Had to be replaced.

[0004]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a protective layer and a method for forming the same, which do not require replacement for a long period of time until the waste dump hole is filled with waste. . Another object of the present invention is to provide a protective layer which can be easily formed and a method for forming the same.

[0005]

SUMMARY OF THE INVENTION The present invention provides a protective layer for a water-impervious sheet covering a bottom surface of a waste dumping hole and a slope connected to the bottom surface. A bag made of one or a plurality of woven or knitted fabrics, and a solidified slurry of an aggregate and a solidifying material (eg, cement, slaked lime, gypsum, thermosetting resin) filled in the bag. .

[0006] The protective layer is formed by arranging one or more bags made of woven or knitted fabric on at least the impermeable sheet on the slope and injecting the slurry into the bags.

[0007] The protective layer on the slope may be made of a solidified product of a mixture containing the aggregate and the solidifying material formed on the water impermeable sheet. This protective layer is formed by spraying the mixture on the water-impervious sheet. Further, prior to spraying, the slurry can be poured onto the water-impervious sheet on the bottom surface.

[0008] The protective layer may be formed of a plurality of blocks made of the solidified mixture of the mixture arranged on the water-impervious sheet, or a solidified product of the slurry filled in a plurality of bags. .

The aggregate includes sand, gravel, earth and sand, construction surplus soil,
It can be at least one of sludge, coal ash, incineration ash, incineration fly ash, molten slag, molten fly ash, concrete shell, concrete waste, glass shards, crushed incombustibles, metal shards or plastic shards.

[0010] The waste dumping hole comprises a hole in service in which waste has been dumped, and the waste in the hole in service can be used as at least a part of the aggregate.

[0011]

According to the present invention, the solidified product of the slurry containing the aggregate and the solidifying material, which fills the bag made of woven or knitted fabric, has the property of being hardly deteriorated by ultraviolet rays or wind and rain. Has the mechanical strength to withstand the traveling of the vehicle carrying the equipment or the equipment introduced for spreading the deposited waste. Further, since the bag is covered and reinforced by a part of the slurry that permeates into the fibers of the bag or oozes out of the bag and solidifies,
The bag itself has substantially the same resistance to deterioration and strength. For this reason, it is possible to protect the water-shielding sheet to be protected from ultraviolet rays, wind and rain, and external force exerted at the time of dumping and spreading of waste without replacing the water-shielding sheet to be protected for a long time.

The protective layer can be easily formed by arranging the bag on the water-impervious sheet and feeding the bag as the slurry.

When the protective layer is formed from a solidified material of a mixture containing the aggregate and the solidified material, the thickness (layer thickness) can be arbitrarily set. In particular,
When using a solidified material such as ash-containing aggregate or cement, the solidified material has a high pH, so put the soil on the protective layer for greening of the waste disposal site. When plants are planted, the roots of the plants repel the protective layer. Therefore, it is possible to prevent the water-impervious sheet from being damaged due to the penetration of the protective layer accompanying the elongation of the plant root.

This protective layer can be easily formed by spraying a slurry-like or non-slurry-like mixture onto the water-blocking sheet. In addition, prior to the spraying, the protective layer can be easily formed on the bottom surface by pouring the slurry onto the water-impervious sheet on the bottom surface.

[0015] The protective layer can be formed of a solidified product of the mixture and a solidified product of the slurry filled in a plurality of lumps or a plurality of bags.

Examples of the aggregate include construction surplus soil, sludge, coal ash, incineration ash, incineration fly ash, molten slag, molten fly ash, concrete shell, concrete waste, glass fragments, incombustible crushed materials, metal fragments, plastic fragments, etc. When utilizing the waste, it is helpful to dispose of the waste.

Further, by using the waste in the hole in service as an aggregate, the amount of waste in the hole is reduced, and the capacity that can be dumped at the waste disposal site can be substantially increased. . Further, material costs and transportation costs required for forming the protective layer can be reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a waste dumping hole at a waste disposal site is indicated generally by the reference numeral 10.

The hole 10 has an overall shape such as a truncated pyramid such as an inverted truncated pyramid, an inverted truncated cone, or the like.
It has a bottom surface 12 and a slope 14 composed of one or more conical surfaces connected to the bottom surface.

In the illustrated example, the bottom surface 12 and the slope 14 of the hole 10 are disposed on the wall surface of a recess 18 obtained by excavating the ground 16 for installing the hole 10, and the impermeable layer covering the wall surface. 20.

The bottom surface 12 and the slope 14 of the hole 10 are covered with a waterproof sheet 22 made of rubber, for example, disposed on these surfaces. The water-blocking sheet 22 prevents water in which harmful substances in waste (not shown) dumped in the holes 10 have dissolved into the ground.

The waterproof sheet 22 is covered with the protective layer 24 of the present invention. The protective layer 24 is used for deterioration of the impermeable sheet 22 due to ultraviolet rays or wind and rain, entry and running of a vehicle when the waste is dumped into the hole 10, or entry of a device used for leveling the waste after the dumping.・ Waterproof sheet 2 during running
2 to prevent damage.

Since the waste discarded in the hole 10 is deposited so as to gradually cover the slope 14 from the bottom surface 12, the waste material is exposed to ultraviolet rays and wind and rain for a longer period than the bottom surface 12.
In addition, the slope 1 to which waste transport vehicles and leveling devices enter.
The protective layer 24 may be provided only on a part of the water-impervious sheet 4 above. Of course, the protective layer 24
As shown in the illustrated example, the waterproof sheet 22 may be disposed over the entire surface of the water-blocking sheet 22 that covers the bottom surface 12 and the slope 14.

The protective layer 24 includes a plurality of bags 26 disposed on the water-impervious sheet 22 and covering the water-impervious sheet 22, and a solidified product of a slurry containing aggregate and solidified material filled in the bag (see FIG. Not shown). Instead of the illustrated example using a plurality of bags 26, one bag that can cover the water-blocking sheet 22 can be used.

The bladder 26 is made of a woven or knitted fabric having a weave or mesh sized to prevent the passage of aggregates in the slurry, preferably a mesh of synthetic fibers such as geotextile.

As an aggregate forming a part of the slurry,
Sand, gravel, earth and sand (eg, locally generated soil), construction surplus soil, sludge, coal ash, incineration ash, incineration fly ash, molten slag, molten fly ash, concrete shell, concrete waste material, glass fragments, incombustibles, metal fragments , Plastic pieces, etc., that is, a mixture of one or more of these. As the solidifying material, for example, cement, slaked lime, gypsum, thermosetting resin, or the like can be used.

The solidified product of the slurry has resistance to deterioration due to ultraviolet light and wind and rain, and is capable of operating a device for running a waste transport vehicle or leveling waste after dumping. It has strong strength. Further, since the bag 26 is soaked in the fibers constituting the bag and is covered with a part of the slurry leaked from the weave or mesh of the bag 26, the solidified material in the bag 26 is formed. It has almost the same resistance and mechanical strength as. For this reason, the bag body 26 and the protective layer 24 made of the solid material filled therein endure long-term use.

The ratio of the aggregate, the solidified material and the water constituting the slurry can be, for example, 1000 kg of the aggregate, 50 kg of the solidified material and 500 liters of water per 1 m ^{3 of} the slurry. When the compounding ratio of the solidifying material is set to be larger, the waterproofness of the protective layer 24 can be given, and the waterproofness of the hole 10 can be further enhanced.

The protective layer 24 is formed on the slope 14 with the impermeable sheet 2.
2 and one or more bags 26 (FIG.
) Are laid one after the other or one after another and supported at the upper end of the slope 14 (open end of the hole 10), and then the slurry is pumped into the bag 26 by, for example, a concrete pump (not shown), and injected into the bag 26. Formed. The protective layer 24 can be easily formed by the pressure feeding of the slurry.

One bag has a planar shape corresponding to the planar shape of the slope 14. In addition, the plurality of bags 26 cooperate with each other to form a shape corresponding to the planar shape of the slope 14. In the illustrated example, two types of plural bag bodies 26 having rectangular and triangular plane shapes are used and laid out so as to cover each of the trapezoidal conical surfaces forming a part of the slope 14. .
The bag 26 functions as a mold for the slurry.

When the slurry is poured into the bag 26, the front portion of the bag 26 and the rear surface facing the bag 26 are formed such that the bag 26 has a flat overall shape without being partially expanded. A plurality of yarns 27 for regulating the interval between (in FIG. 1, however, in order to avoid complexity of the drawing,
(Only one of them is representatively represented).

With respect to the formation of the protective layer 24 on the bottom surface 12, after filling the slurry on the slope 14,
Alternatively, prior to this, one or a plurality of bags 26 that cover the water-impervious sheet 22 on the bottom surface 12 are laid out, and the bag 26 is filled with the slurry in the same manner as described above. it can.

The present invention can be applied to a newly formed hole in which waste has not yet been dumped, as well as a slope of a hole in service where waste has been dumped. In this case, the waste in the hole can be used as at least a part of the aggregate.

Further, as shown in FIG.
May be a layer 30 composed of only a solidified product of a mixture containing the aggregate and the solidified material.

In the example shown in FIG. 3, the bottom surface 12 of the hole 10 and the slope 14 connected thereto are defined by the wall surface of the recess 18, and the wall surface is covered with the water-blocking sheet 22. The hole 10 is a hole in service in which the waste 32 has been dumped, and the water-blocking sheet 22 on the bottom surface 12 and a part of the slope 14 of the hole 10 is covered with the dumped material 32.

The protection layer 30 made of only the solidified material is disposed on the water-impervious sheet 22 covering the remaining part of the slope 14. Thereby, the remaining part of the impermeable sheet 22 on the slope 14 which is not yet covered with the waste 32 and is therefore exposed to the ultraviolet rays and the wind and rain for a long period of time is blocked therefrom, It can be protected from deterioration.

The thickness of the protective layer 30 made of only the solidified material can be easily set as compared with the case where the bag is used.

The protective layer 30 is formed by spraying a non-slurry mixture, that is, a mixture having a low water content and therefore having no fluidity, onto the water-blocking sheet 22 on the slope 14.

The spraying operation can be performed on the waste 32 by using a spraying device 34. Spray device 34
Includes a spray gun 36 for injecting the mixture toward the impermeable sheet 22 on the slope 14 using air as a carrier medium, and an air compressor and a mixture tank disposed in a casing 37. The air compressor is connected with a hose 38. Instead of the spray device 34, a belt conveyor can be used.
In this case, the protective layer 30 is formed by operating the belt conveyor to discharge the mixture on the belt conveyor toward the slope 14 at a high speed and hitting the water-shielding sheet 22 on the shielding surface. can do.

Since the sprayed mixture is non-slurry, it stays on the slope 14 without flowing down on the slope 14 and solidifies as time passes. Protective layer 3
0 can be a desired thickness by adjusting the number of sprays of the mixture.

When the hole 10 is a new one in which no waste has yet been dumped, the non-slurry mixture is placed on the water-blocking sheet 22 on the bottom surface 12 in the same manner as on the slope. A protective layer can be formed on the substrate. Alternatively, the protective layer can be formed on the water-impermeable sheet by pouring the slurry onto the water-impermeable sheet 22 on the bottom surface 12. It is desirable that the slurry be poured before the formation of the protective layer on the slope 14 by spraying the mixture.

Instead of the non-slurry mixture, a slurry mixture can be used. At this time, a relatively viscous material is used so that the sprayed slurry-like mixture does not flow down the slope, or a quick-setting admixture is added to the slurry-like mixture immediately before spraying. Spraying of the slurry-like mixture can be performed using a mortar pump instead of the air compressor.

Further, as shown in FIG.
May be a protective layer 40 composed of a plurality of lumps 39 which are solidified products of a mixture containing the aggregate and the solidified material.

These lumps 39 are arranged on the impermeable sheet 22 on the slope 14 so as to cover the same. Lump 3
9 may be arranged in two tiers as in the example shown. When arranging in two layers, the gap formed between the lower blocks 39 can be filled or covered with the upper blocks 39.

The protective layer 40 composed of a plurality of lumps 39 can be formed by stacking the lumps 39 one by one on the impermeable sheet 22 on the slope 14 along the slope of the impermeable sheet.

The protective layer 40 is formed by solidifying a slurry containing aggregate and solidified material filled in a plurality of bags in place of the plurality of lumps 39 and in the same manner as when using the lumps 39. It can be formed using. Alternatively, the bag may be filled with the slurry on the sloped sheet 22 and left on the sheet as it is to wait for the slurry to solidify. The bag may be made of the same material as shown in FIGS. The plurality of lumps 39 and the solidified material put in the bag can be arbitrarily determined, such as a set of the same shape, a set of different shapes, and a set of different sizes.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a protective layer formed on a water impermeable sheet.

FIG. 2 is a schematic plan view of a plurality of bags arranged and arranged on a conical surface forming a part of a slope of a waste dumping hole.

FIG. 3 is a partial cross-sectional view of a part of a protective layer formed on a water impermeable sheet.

FIG. 4 is a partial cross-sectional view of a part of a protective layer formed on a water-impermeable sheet.

[Explanation of symbols]

10, 12, 14 Waste dumping holes, bottom surface and slopes 22 Waterproof sheet 24, 30, 40 Protective layer 26 Bag 32 Waste 34 Spraying device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Taku Ohori 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Headquarters of Kumagaya Gumi Tokyo Co., Ltd. (72) Inventor Takahiro Shimizu 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office (72) Inventor Masaru Hatae 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office (72) Inventor Takeharu Yoshimura 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office (72) Inventor Ei Nonaka 2-1, Tsukudo-cho, Shinjuku-ku, Tokyo Kumagaya Gumi Tokyo Head Office F-term (reference) 2D018 AA06 DA03 4D004 AA46

Claims (10)

[Claims] 1. A protective layer for a water-impervious sheet covering a bottom surface of a waste dumping hole and a slope connected to the bottom surface, wherein at least one or more fabrics are disposed on the water-impervious sheet on the slope. Alternatively, a protective layer comprising a bag made of a knitted fabric and a solidified slurry containing an aggregate and a solidifying material filled in the bag. 2. A method for forming a protective layer for a water impermeable sheet covering a bottom surface of a waste dumping hole and a slope connected to the bottom surface, comprising a woven or knitted fabric on at least the water impermeable sheet on the slope. A method for forming a protective layer, comprising: disposing one or a plurality of bags, and injecting a slurry containing an aggregate and a solidifying material into the bags. 3. A protective layer for a water-permeable sheet covering a bottom surface of a waste dumping hole and a slope connected to the bottom surface, wherein the aggregate and the solidification are formed on at least the water-permeable sheet on the slope. A protective layer made of a solidified mixture of materials. 4. A method for forming a protective layer for a water impermeable sheet covering a bottom surface of a waste dumping hole and a slope connected to the bottom surface, wherein at least on the water impermeable sheet on the slope, aggregate and solidification are provided. A method for forming a protective layer, comprising spraying a mixture containing a material. 5. The method for forming a protective layer according to claim 4, further comprising, before spraying the mixture, pouring a slurry containing an aggregate and a solidifying material onto the impermeable sheet on the bottom surface. 6. A protective layer for a water-permeable sheet covering a bottom surface of a waste dumping hole and a slope connected to the bottom surface, wherein the aggregate and the solidification are arranged at least on the water-permeable sheet on the slope. A protective layer comprising a plurality of lumps which are solidified mixtures of materials. 7. A protective layer for a water-impervious sheet covering a bottom surface of a waste dumping hole and a slope connected to the bottom surface, the bone being filled in a plurality of bags arranged at least on the slope. A protective layer made of a solidified slurry of a material and a solidified material. 8. The aggregate includes sand, gravel, earth and sand, construction surplus soil, sludge, coal ash, incineration ash, incineration fly ash, molten slag, molten fly ash, concrete shell, concrete waste material, glass fragments, and incombustible crushing. The protective layer according to any one of claims 1, 3, 6, and 7, comprising at least one of an object, a metal piece, and a plastic piece. 9. The aggregate includes sand, gravel, earth and sand, construction surplus soil, sludge, coal ash, incineration ash, incineration fly ash, molten slag, molten fly ash, concrete shell, concrete waste, glass fragments, and incombustible crushing. The method for forming a protective layer according to claim 2, wherein the method comprises at least one of an object, a metal piece, and a plastic piece. 10. The waste dumping hole comprises a hole in service in which waste is dumped, and the waste in the hole in service is used as at least a part of the aggregate. 6. The method for forming a protective layer according to any one of items 4 and 5.