JPH0929197A - Deaerating structure of impervious sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a laborious deaerating stage of impervious sheets by expelling the air stagnating between the impervious sheets laid on the inside wall of a hole dug for reclamation of industrial waste, etc., and a ground surface to the outside by using a previously formed member for deaeration. SOLUTION: This deaerating structure A for the impervious sheets removes the air stagnating between the impervious sheets 1 and the ground surface C in the following manner: A water-impermeable impervious sheets 1 laid on the inside wall of the reclamation hole are bored with a through-hole. The member 2 for deaeration constituted by forming a collar body 21a on the outer peripheral part of a projecting body 20 consisting of a cylindrical projecting member 21b having a hermetically sealable inside hollow part and an inverted U-shape deaerating pipe 22 freely attachably and detachably and liquid-tightly mounted at this projecting member 21b is mounted at the impervious sheets 1 in such a manner that this through-hole and the inside of the projecting member 21b are communicated with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents air from accumulating between the water impermeable sheet laid on the inner wall of a hole dug for landfilling industrial waste and the ground, and damaging the impermeable sheet. The present invention relates to a deaeration structure of a water-proof sheet that prevents

[0002]

2. Description of the Related Art Conventionally, when burying industrial waste, etc., a small stage (so-called dog running portion) D provided with a water reservoir side groove d in a landfill as shown in FIG. 4 has been used. The landfill hole B is dug so as to be formed in a staircase following the surface E, and wastes and the like are dumped in the landfill hole B. Here, sewage and harmful substances contained in the wastes and the like are collected. A synthetic resin waterproof sheet 1 is laid on the inner wall of the landfill hole B so as not to penetrate into the soil.

By laying the water-blocking sheet 1, there occurs a phenomenon in which air stays between the ground C and the water-blocking sheet 1, and wastes are dumped from the bottom side of the landfill hole B. As the water-blocking sheet 1 is pressed against the ground as a result, the air staying under the water-blocking sheet 1 is pushed upwards, so that the water is shielded especially at the small step D near the buried surface of the discarded waste. Air stays between the water sheet 1 and the ground, so that the ground, especially the ground of the shoulder (upper shoulder) e of the step D, collapses, and the part of the water shield sheet 1 laid on the step D collapses. There was a risk of damage. In particular, when the non-woven fabric 3 is laid between the lower side and the ground D to protect the water-blocking sheet 1, the air contained in the non-woven fabric 3 also stays, and the above-mentioned situation occurs. It was likely to occur.

For this reason, conventionally, when the air is accumulated in the small step D portion following the slope E at the lowest position due to the progress of the landfill operation, the impermeable sheet 1 corresponding to that portion is partially cut and accumulated in the portion. After performing the complicated work of removing the removed air and then repairing the cut portion by an appropriate method, the landfill work is further advanced, and the land is buried up to a small step D following the upper slope E. However, when air retention occurs again in that portion, a process of repeating the above-mentioned complicated work again is generally performed.

Therefore, there has been a demand for a technique for removing the air accumulated between the water-blocking sheet 1 and the ground C without repeating such complicated work.

The present invention has been made in order to meet the above-mentioned demand, and the air accumulated between the water-blocking sheet and the ground is removed to the outside by using a pre-made deaeration member. It is an object of the present invention to provide a deaeration structure for a water-blocking sheet that can simplify such a complicated process.

[0007]

In order to achieve the above-mentioned object, the present invention provides a water-impermeable impermeable sheet laid on the inner wall of a hole dug for landfilling industrial waste, and the impermeable sheet. Is a deaerating structure of a water-impervious sheet for removing air accumulated between the water-impermeable sheet and the ground, and a cylindrical protrusion capable of forming a through-hole in the water-impermeable sheet and sealing the inner hollow portion. A deaeration member having a body and a collar body liquid-tightly joined to the water-blocking sheet is attached to the water-blocking sheet by connecting the through hole of the water-blocking sheet and the protruding body. Provide a deaeration structure for the water blocking sheet.

That is, the deaerating structure of the water-blocking sheet of the present invention is
The water blocking sheet laid on the inner wall of the landfill hole dug up for landfilling industrial waste, the flange body of the degassing member to the water blocking sheet, the through hole of the water blocking sheet (usually the landfill hole (Opened in a small step) and the inner hollow portion of the protrusion of the degassing member are fluid-tightly joined to each other to attach the degassing member to the impermeable sheet for use.

The deaerating member attached in this manner removes the air accumulated between the water blocking sheet and the ground to the outside from the cylindrical projection communicating with the through hole of the water blocking sheet. is there.

Then, after the work of dumping the waste into the landfill hole progresses and the waste reaches the vicinity of the projecting body, the hollow inside of the projecting body is sealed so that the soil under the water blocking sheet is closed. Prevent permeation of sewage and harmful substances contained in waste, etc.

Here, the structure of the degassing member is constituted by a cylindrical projection member whose inner hollow portion can be sealed, and a cylindrical degassing pipe which is detachably and liquid-tightly attached to the projection member. If the flange body is provided on the outer peripheral portion of the protruding body, the protruding body is configured by attaching the deaeration pipe to the protruding member, and it is easy to deaerate the impermeable sheet as in the above. In addition to the above, after the waste dumping work in the landfill hole progresses, the degassing pipe is removed from the projecting member, and then the inner hollow part of the projecting member is sealed by an appropriate means to remove soil. It is possible to easily prevent the permeation of sewage and harmful substances into the inside.

In particular, the degassing member has a structure in which the projecting body has an inverted U shape.
With the configuration formed in a letter shape, when attaching the deaeration member to the water blocking sheet located in the small step portion, since the tip opening of the projecting body is completely downward so as to face the ground, the water blocking sheet When used as the degassing structure, the rainwater does not enter through the tip opening of the protrusion.

Further, if the inner hollow portion of the projecting member of the degassing member can be hermetically sealed by fusion bonding, sewage and harmful substances contained in wastes and the like permeate into the soil under the waterproof sheet. This is more preferable because the work of sealing the inner hollow portion of the protrusion so as not to do so becomes simpler.

Further, the projection member and the deaeration pipe are fitted together, or the projection member is formed into a cylindrical shape and a screw portion is formed, and the deaeration pipe is correspondingly formed into a cylindrical shape. By adopting a structure in which a threaded portion that is screwed into is formed, the work of attaching and detaching the deaeration pipe becomes easy.

In the case of the structure in which the screw portion is formed, if a headed cylindrical lid member having a screw portion that is screwed into the screw portion of the protruding member is prepared, after the deaerating step of the water-impervious sheet is completed. ,
The tip of the protruding member can be sealed with a simple operation.

Further, conventionally, a non-woven fabric is laid under the waterproof sheet to protect it.
The deaerating structure of the water-impervious sheet of the present invention is capable of reliably and effectively deaerating the air accumulated between the water-impervious sheet and the ground by a simple operation as described above, and the non-woven fabric thereof is included. Since air can be completely degassed, the utility of the present invention can be more exerted when a nonwoven fabric is laid under the water-blocking sheet.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments and examples of the present invention will be described below with reference to the drawings, but the present invention is not limited to the following examples.

FIG. 1 shows a deaeration structure A of a water-impervious sheet. This deaeration structure A comprises a water-impervious sheet 1 and a deaeration member 2 laid on the ground C in a landfill hole B. The degassing member 2 is composed of the projecting body 20 and the collar body 21a projecting from the outer peripheral edge of the lower end of the projecting body 20.
In the case of the present embodiment, the projecting body 20 comprises a projecting member 21b and an inverted U-shaped degassing pipe 22 which is detachably fitted to the projecting member 21b. Although it is configured with a brim body protruding integrally,
The projecting member of the present invention can be formed into a cylindrical shape in which the projecting member and the deaeration pipe are integrally formed and the inner hollow portion can be sealed.

As the water-blocking sheet 1, a sheet made of synthetic resin or the like which has conventionally been laid for water-blocking a landfill can be used. Examples of such a sheet include polyethylene, chlorinated polyethylene, and the like. Ethylene-vinyl acetate copolymer, ethylene-based resins such as ethylene-acrylic acid copolymer, polypropylene resin, polyvinyl chloride resin,
Ethylene polypropylene diomonomer non-vulcanized resin, and a thermoplastic resin sheet such as a mixed resin of ethylene-vinyl acetate copolymer and ethylene polypropylene diomonomer resin, a mixture of ethylene-vinyl acetate copolymer and bituminous material, and the like. Examples include vulcanized rubber sheets,
The thickness is preferably in the range of about 0.1 to 5 mm. The waterproof sheet 1 may have a single-layer structure or a multi-layer structure.

The deaeration structure A of the present invention is the water-blocking sheet 1.
As shown in FIG. 2, through holes 1a are formed in the landing holes B at the positions corresponding to the small steps D, respectively. 1 unit D
The number, size, and shape of the through holes 1a per hit are not particularly limited, but for example, on a small step following the slope E at the lowest position, for example, about 15 m at appropriate intervals along the circumferential direction. , 30 in case of small step D following slope E above that
5 to 50 mm in diameter, especially 20 at intervals of about m
It is preferable to open a circular through hole 1a of about mm.

The degassing member 2 constituting the degassing structure A of the present invention in combination with the through holes 1a of the water-blocking sheet 1 is the same as the degassing member 2 shown in FIGS. As shown in FIG. 5, the protrusion member 21b and the degassing pipe 22 are included in the protrusion member 20, and the protrusion member 21b is integrally formed with a collar member 21a. Projection member 21b
The material of the collar body 21a is preferably a material such as a thermoplastic resin similar to that of the water-blocking sheet, which can be bonded to the water-blocking sheet through thermal bonding or an adhesive and has a certain degree of hardness. Examples of such resins include polyvinyl chloride resin, ethylene-vinyl acetate copolymer, ethylene polypropylene diiomonomer non-vulcanized resin, and the like.

The method for manufacturing the protruding member 21b and the collar body 21a is not particularly limited, but for example, a resin sheet made of the above resin is heated and squeezed to swell the central portion thereof, and then the upper portion thereof is swelled. A method of cutting and forming the collar body 21a and the cylindrical protruding member 21b integrally, a method of various molding methods using a mold, and the like are preferable. Here, the size and shape of the collar body 21a are not particularly limited, and
The size and shape of the protruding member 21b are not particularly limited as long as they correspond to the through holes 1a of the water-blocking sheet 1, but for example, the collar body 21a has a side of 100 to 500.
mm, particularly about 200 mm, and a square sheet having a thickness of 0.5 to 5 mm, the central portion of which is formed into a circular shape corresponding to the protruding member 21b, and the protruding member 21b has a diameter of 5 to 50 m.
It is preferable to manufacture it into a cylindrical shape having m, particularly about 20 mm and a height of 5 to 100 mm.

The shape of the degassing pipe 22 requires that it can be detachably and liquid-tightly attached to the projecting member 21b, and at the time of attachment, rainwater or the like can pass through the tip opening of the pipe 22 so that the water blocking sheet 1 can be protected. Since it is desirable that the upper part is bent in an inverted U shape so as not to enter between the ground and the ground C, the pipe center part is bent as shown in FIG. It is preferable to use an inverted U-shaped pipe so that the portion 22a faces completely downward. The material of the degassing pipe 22 is not particularly limited, but a metal pipe such as iron or a hard synthetic resin pipe such as vinyl chloride is suitable. Here, when the deaeration pipe 22 is fitted to the protrusion member 21b, it is desirable to insert the deaeration pipe 22 into the protrusion member 21b in consideration of these materials. It is preferable that the inner diameter of the member 21b be matched.
The protrusion 20 is formed by fitting the degassing pipe 22 to the protrusion member 21b.

Hereinafter, a method of constructing the degassing structure A of the above-mentioned waterproof sheet will be described with reference to FIG. First, the water blocking sheet 1 is laid on the ground C in the landfill hole B. Here, the ground C
It is preferable that the non-woven fabric 3 is previously laid on the non-woven fabric 3 and the water-blocking sheet 1 is laid on the non-woven fabric 3 because the non-woven fabric 3 serves as a cushion.

Next, the through hole 1a of the waterproof sheet 1 of the small step D and the protruding member 21b are aligned with each other, and the brim on the waterproof sheet 1 so that the through hole 1a and the inner hollow portion of the protruding member 21b communicate with each other. After the body 21a is placed (see FIG. 2), and the collar body 21a is liquid-tightly bonded by an appropriate means such as heat-sealing the heat-shielding sheet 1 by heat-bonding or by bonding with an appropriate adhesive. , The deaeration pipe 22 is inserted into the protruding member 21b. Then, the inner wall of the protruding member 21b and the outer wall of the degassing pipe 22 are tightly bonded to each other with a stainless steel band 23, a wire, or the like, and the degassing pipe 22 is attached to the protruding member 21b. Let structure A.

By using this deaeration structure A to deaerate the air accumulated between the water-blocking sheet 1 and the ground C, industrial waste and the like are dumped into the landfill hole B, and then the bottom When the amount of waste increases near the small stage D at the position, the degassing pipe 22 is removed from the protruding member 21b just before the protruding member 21b attached to the small stage D is buried, and the protruding member 21b is heat-sealed, for example. Then, the protrusion member 21b and the collar body 21a are buried to prevent sewage and harmful substances in the waste from penetrating into the ground C. Then, by sequentially repeating the above operation in accordance with the amount of discarded waste, the pressure of the waste can be used to gradually deaerate the air that accumulates between the impermeable sheet 1 and the ground C. it can.

As shown in FIG. 3, the degassing structure A of the present invention is also suitable as a shape in which, for example, the outer wall of the protruding member 21b is cut with a male screw to form a screw portion 21c. In this case, the protruding member 21b and the collar body 21a are preferably made of the same material as that of the degassing pipe 22, and a hard synthetic resin such as vinyl chloride resin is suitable as the material. In the case of this degassing structure A, the degassing pipe 22
Has an inner diameter corresponding to the outer diameter of the projecting member 21b, and an internal thread is formed on the inner wall so as to be screwed with the threaded portion 21c of the projecting member 21b to form a threaded portion (not shown). Here, it is preferable to prepare a capped cylindrical lid member 24 having a screw portion 24a on the inner wall so as to be screwed with the screw portion 21c of the protruding member 21b.

The degassing member 2 is a flat ring-shaped packing 4 in advance before the impermeable sheet 1 is laid on the ground C.
Mounted on the upper surface of the brim body 21a, and then the protruding member 21b.
Is inserted into the through hole 1a from the lower side of the water impervious sheet 1, and the flat plate ring-shaped packing 4 is fitted into the protruding member 21b. The outer periphery of the lower end of the member 21b and the lower surface of the water blocking sheet 1 around the through hole 1a and the upper surface of the collar body 21a are liquid-tightly attached to the water blocking sheet 1. Then, after laying the water-blocking sheet 1, the deaeration pipe 22 is screwed onto and attached to the protruding member 21b for use.

In the case of this degassing structure A, the above degassing structure A
Similarly to the above, it is possible to deaerate the impermeable sheet by a simple operation, and after removing the deaerating pipe 22 from the projecting member 21b, the projecting member 21b is removed by the lid member 24 described above.
Can be easily sealed.

[0030]

According to the present invention, there is provided a degassing member in which air accumulated between the water-blocking sheet and the ground on the surface of the landfill hole is previously created by the pressure of industrial waste dumped in the landfill hole. The air can be gradually degassed by utilizing it, and the air accumulated between the water blocking sheet and the ground can be reliably discharged to the outside by a simplified process.

[Brief description of drawings]

FIG. 1 is a front view illustrating an example of a deaeration structure for a water-impervious sheet according to the present invention, showing a state in which a deaeration member is attached to the water-impermeable sheet.

FIG. 2 is a vertical cross-sectional view showing an example of a protruding member and a collar body forming the degassing member.

FIG. 3 is a vertical cross-sectional view showing another example of the protrusion member and the collar body.

FIG. 4 is an abbreviated cross-sectional view of a landfill hole for explaining a conventional degassing method for a water-impervious sheet.

[Explanation of symbols]

 A Deaeration structure of water-impervious sheet C Ground 1 Water-impervious sheet 1a Through hole 2 Deaeration member 20 Projection body 21a Collar body 21b Projection members 21c, 24c Screw part 22 Degassing pipe 24 Lid body

Claims (8)

[Claims] 1. A method for removing air accumulated between an impermeable water impermeable sheet laid on an inner wall of a hole dug for landfilling industrial waste and the ground on which the water impermeable sheet is laid. A water-impermeable sheet degassing structure for forming a through hole in the water-impermeable sheet, and a cylindrical protrusion capable of sealing the inner hollow portion and a collar body liquid-tightly joined to the water-impermeable sheet. A deaeration structure for a water-blocking sheet, comprising: 2. A projection for the degassing member, which comprises a cylindrical projection member whose inner hollow portion can be sealed, and a cylindrical degassing pipe which is detachably and liquid-tightly attached to the projection member. The degassing structure for a water-blocking sheet according to claim 1, wherein a brim body is provided on an outer peripheral portion of the body. 3. The deaeration structure for a water-blocking sheet according to claim 1, wherein the protrusion is formed in an inverted U shape. 4. The deaeration structure for a water-blocking sheet according to claim 1, 2 or 3, wherein the inner hollow portion of the protrusion can be sealed by fusion. 5. The deaeration structure for a water-blocking sheet according to claim 2, 3 or 4, wherein the protrusion member and the deaeration pipe are fitted together. 6. The water impervious sheet according to claim 2, wherein the projection member has a cylindrical shape having a threaded portion, and the deaeration pipe has a cylindrical shape having a threaded portion screwed into the threaded portion. Degassing structure. 7. The deaeration structure for a water-impervious sheet according to claim 6, further comprising a capped cylindrical lid member having a threaded portion screwed into the threaded portion of the protruding member. 8. The deaeration structure for a water-blocking sheet according to claim 1, wherein a nonwoven fabric is laid under the water-blocking sheet.