JPH1133514A - Fiber-reinforced water shielding sheet and water shielding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the strength of the warp of a screen and solve the trouble that a fiber reinforced water shielding sheet to be laid in a waste disposal site for shielding water is extended due to stress application by making the sheet by burying the screen in an elastomer. SOLUTION: A fiber reinforced water shielding sheet 1 to be used in a waste disposal site for preventing polluted water from leaking is made by burying a screen 3 in a sheet made of an elastomer 2 of such as vulcanized rubber. As a material to be used for the elastomer 2, a blend of ethylene propylene polymer and butyl rubber can preferably be used. The screen 3 is made of the thick and highly strong warp 4 and the thick weft 5 having strength sufficient to make the warp 4 in order and synthetic fibers such as polyester fibers, polyamide fibers and cotton may be employed. Preferably, the warp 4 has 20 kg/cm or higher strength and the weft has 0.1-1.0 kg/cm or lower strength.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber-reinforced water-impervious sheet and a water-impervious method for use in a water-impervious construction method at a waste disposal site, etc., and to prevent the fiber-reinforced water-impervious sheet from breaking due to stress. Is what I tried.

[0002]

2. Description of the Related Art In recent years, contamination of the surroundings due to leakage of sewage at a waste disposal site has been regarded as a problem, and water is always shielded at the waste disposal site.

[0003] Waste disposal sites usually dig deep holes in the groundwork and dump waste into the holes. Sewage generated from waste seeps into the ground and spreads to the surroundings, polluting surrounding land and leading to environmental pollution. For this reason, water-impervious sheets of various materials such as rubber and resin are laid all over the base of the waste disposal site, and sewage generated from waste and dissolved in rainwater penetrates into the base. It is not going to be stripped.

[0004] When a rubber sheet is used as a water-blocking sheet, especially when it is laid on the slope of a disposal site, the sheet is inevitably stretched below the slope. The sheet stretches,
When the sheet becomes loose, a large tension is applied to the upper portion, and a small amount of the sheet may break. In order to improve such a situation, a rubber sheet in which a base cloth is embedded in a rubber sheet is used.

[0005]

When a rubber sheet whose impact resistance is improved by embedding a base cloth is used as a water-shielding sheet, it can be used even in a portion where a large stress is applied such as a slope. Although stretching of the sheet can be prevented, stretching of such a sheet can hardly be expected, which may cause a problem.

[0006] For example, if there is a depressed portion on the base, if the weight of the waste is applied on the depressed portion, if the sheet does not contain the base cloth, the sheet is stretched to absorb the fall of the sheet due to the depressed portion. However, if the sheet containing the base cloth cannot be expected to stretch, the sheet may be broken at the depressed portion.

[0007] If a break occurs, even if it is only a part, the problem of water leakage occurs. Further, once a part is broken, if the part is subjected to a stress such as a slope, a crack may be further extended from the broken part and a large crack may be formed.

Therefore, in the present invention, a water-impervious sheet and a light-shielding sheet which have sufficient strength so that the sheet does not expand even under stress, and which can absorb the depression of the base, etc. The purpose is to provide a water method.

[0009]

According to a first aspect of the present invention, there is provided a fiber-reinforced waterproof sheet used for waterproofing a waste disposal site or the like in order to achieve such an object, in which a sudare is embedded in an elastomer. It is characterized by having done.

[0010] By adopting such a configuration, the warp side of the slender can maintain the strength, so that the sheet does not expand even when stress is applied, but the sheet is not stretched. Since the sheet is stretched by cutting the weft and can sink along the depressed portion, even if weight is applied from above the sheet in the depressed portion, it can be absorbed by elongation in the weft direction. Originally, when such an effect is aimed, it is not necessary to provide a weft, but in order to improve the processability in manufacturing, it is preferable to combine the warp with the weft.

According to a second aspect of the present invention, the warp of the sludge is 20 k.
gf / cm or more, weft 0.1-1.0k
It has a strength of gf / cm or less. By doing so, even when laid on slopes where large stress is applied, the warp side can withstand the stress sufficiently, and the weft can be cut easily, so that unevenness such as sinking parts Even if there is, the sheet does not break according to the shape.

According to a third aspect of the present invention, there is provided a waterproofing method applied to a waste disposal site or the like, wherein a fiber-reinforced waterproofing sheet used in a place where a stress is applied in one direction is a waterproofing sheet in which Sudare is embedded in an elastomer. And the warp direction or the weft direction of the slender is adjusted to the direction in which the stress is applied.

[0013] By adopting such a configuration, the elongation is prevented by the presence of a warp having a strong strength against a known one-way stress, and unevenness such as a depressed portion partially existing on the base material is obtained. Can be cut along the weft.

[0014]

FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of a fiber-reinforced water-impervious sheet according to the present invention. The fiber-reinforced water-impervious sheet 1 of the present invention is a sheet made of an elastomer 2 such as a vulcanized rubber, in which a sump 3 is embedded.

Materials used as the elastomer 2 include chloroprene rubber (CR) and butyl rubber (II
R), styrene butadiene rubber (SBR), ethylene propylene terpolymer (EPT) and the like can be used alone or as a blend, but is not particularly limited, and ethylene propylene terpolymer (EPT) or ethylene propylene terpolymer ( Use of a blend of EPT) and butyl rubber (IIR) is preferable for use as a water-blocking sheet that is constantly exposed to the outside air and exposed to sunlight.

As shown in FIG. 2, the sump 3 is composed of a thick and strong warp yarn 4 and a thin weft yarn 5 having a strength enough to align warps. Synthetic fibers such as polyester fiber and polyamide fiber and cotton can be used as the material of the slap 3.

In the present invention, when the sheet is laid on a slope, for example, when the sheet is laid on a slope, a stress is applied in the longitudinal direction of the slope due to the weight of the sheet, and the warp yarns 4 withstand the stress so as to withstand the stress. The sheet 1 is arranged. Since the warp yarn 4 needs to have strength enough to withstand such stress, a strength of 20 kgf / cm or more can be suitably used.

As another example of laying, when laying in a waste disposal site having a bottom surface that may sink, a water-impervious sheet is laid so that the weft direction of the sludge is aligned with the vertical direction of the slope of the slope. In addition, a water-impervious sheet with a droop will also be laid on the bottom. By adopting such a laying configuration, even if the bottom surface sinks, the weft yarn is cut in the weft direction of the sludge and the impermeable sheet can be extended, so that the sinkage can be absorbed. If a water-impervious sheet with a woven cloth that does not stretch at all is used, the water-impervious sheet will float above the sinking bottom surface, causing high tension and breaking. It could be.

Considering the application to which the present invention is applied, the weft yarn 5 should have a strength as small as possible so as not to break the sheet and to be easily cut with a small force. Is preferred. However, when manufacturing the Sudare 3 or when manufacturing the waterproof sheet 1 by embedding in an elastomer, even if it cuts easily without cutting, it is slight, and the warp 4 can be aligned and affects manufacture. Strength that does not affect the
It is preferably in the range of 1 to 1.0 kgf / cm.

If the strength of the warp yarns 4 is less than 20 kgf / cm, the fiber-reinforced water-impervious sheet 1 will not be able to withstand the stress applied when laid on a slope such as a normal waste disposal site, and will be stretched.

If the strength of the weft yarn 5 is less than 0.1 kgf / cm, the warp yarn 4 is easily cut at the time of production of the slap 3 and the production of the fiber-reinforced waterproof sheet 1, and the warp yarns 4 are held in an aligned state. When it exceeds 1.0 kgf / cm, it becomes difficult to lay the fiber-reinforced water-impervious sheet 1 and follow the unevenness such as the depression of the ground after the laying, and in some cases, it may lead to breakage of the water-impervious sheet. It is not preferable.

By adopting the above-described structure, the fiber-reinforced waterproof sheet 1 can be obtained by embedding the sudare 3 in a state where the warp yarns 4 are aligned and aligned, and have sufficient stress in the vertical direction. It can withstand, prevent elongation, and improve physical properties such as impact resistance of the sheet. As shown in FIG. 3, the water impermeable sheet 1 can be extended by easily cutting the weft thread 5 as shown in FIG.
The stress can be absorbed and breakage of the impermeable sheet can be prevented.

Next, a water blocking method according to a third aspect of the present invention will be described. The fiber-reinforced water-impervious sheet 1 used in the water-impervious construction method of the present invention uses the fiber-reinforced water-impervious sheet 1 according to claim 1 or 2 described above. FIG. 4 is a cross-sectional view of a waste disposal site to which the seepage control method of the present invention is applied. The recess for dumping waste has a bottom surface 10 and a slope 11.

On the bottom surface 10, a water-blocking sheet 12 made of only an elastomer such as vulcanized rubber is laid without embedding a base cloth or a sludge as a teaching material, and a slope 11 is shown in FIG. The fiber-reinforced water-impervious sheet 1 in which such a slenderness 3 is embedded is laid in such a manner that the warp yarns 4 are oriented along a slope along which the sheet is heavy.

Then, the impermeable sheet 1 laid on the bottom surface 10
2 and the impermeable sheet 1 laid on the slope 11 complete the impermeable construction method of the present invention. By adopting such a water-blocking method, even if the water-blocking sheet 1 laid on the slope 11 bears the weight of the water-blocking sheet itself, elongation is prevented by the warp yarns 4, and the water-blocking sheet 1 is partially depressed on the slope 11. When the weft 5 is cut even if there is unevenness, the space between the warp yarns 4 is widened, and the portion of the elastomer 2 of the fiber-reinforced water-impervious sheet 1 is stretched, so that it is possible to follow the unevenness. Accordingly, it is possible to prevent the fiber-reinforced waterproof sheet 1 from being broken.

The water shielding method according to the present invention can be used for applications in which a stress is applied only in one direction as described above.
However, the present invention is not limited to this example, but may be applied to portions other than the slope surface as long as stress is applied in only one direction. Next, the result of a comparative experiment performed by citing an example of the present invention and a comparative example will be described.

[0027]

EXAMPLE As an example, a twisted yarn made of polyester in ethylene propylene terpolymer (EPT) and having a strength of 30 kgf / cm was used. The impervious sheet embedding the sudare woven by using a material having a depth of 45 cm was laid on a slope having a slope of 45 ° at a waste disposal site having a depth of 10 m.

On the slope, a circular recess having a diameter of 50 cm and a depth of 10 cm is provided. A spherical weight having a diameter of 10 cm is placed on the fiber-reinforced water-impervious sheet.
The state of the impermeable sheet after a lapse of time was observed. as a result,
There was no broken portion in the fiber-reinforced waterproof sheet, and elongation occurred due to the cutting of the weft of the drip, and the fiber-reinforced waterproof sheet sank almost along the shape of the weight.

Comparative Example 1 is a water-impervious sheet having the same specifications as those of the example except that a plain woven fabric using a warp and a weft made of polyester and having a strength of 30 kgf / cm is embedded in rubber made of EPT. Was laid on the same slope, and the portion of the water impermeable sheet on which the weight was placed was observed. As a result, the water impermeable sheet was hardly stretched, and the weight was floating above the bottom of the depression. Some of the impermeable sheets were about to break.

In Comparative Example 2, a water-impervious sheet having the same specification as that of the example except that nothing was buried therein was used, and was laid on the same slope, except that nothing was buried. The water sheet was observed. As a result, in the part where the weight was placed, the impermeable sheet extended along the shape of the weight and sank in the depression, but the entire impermeable sheet also extended in an inclined direction, Had loosened.

Therefore, in the present invention, the sump is buried and the warp is laid so as to be arranged along the slope of the slope where stress is imposed due to the weight of the impermeable sheet.
The water-impervious sheet does not slack, and the weft cuts the non-land, such as the depression that exists on the slope, so that it can sufficiently follow the slope.

[0032]

As described above, according to the first aspect of the present invention, in order to achieve such an object, in a fiber-reinforced water-blocking sheet used for water-blocking applied to a waste disposal site or the like, it is possible to reduce the drip in the elastomer. It is characterized by being buried.

By adopting such a configuration, the warp side of the slap can maintain strength, so that the sheet does not expand even when stress is applied, but the sheet is not stretched. Since the sheet is stretched by cutting the weft and can sink along the depressed portion, even if weight is applied from above the sheet in the depressed portion, it can be absorbed by elongation in the weft direction.

According to a second aspect of the present invention, the warp of the sump is 20 k.
gf / cm or more, weft 0.1-1.0k
It has a strength of gf / cm. By doing so, even if it is laid on slopes where large stress is applied,
The warp side can withstand the stress sufficiently, and the weft can be easily cut, so even if there is unevenness such as a depressed portion, it follows the shape and does not cause sheet breakage .

According to a third aspect of the present invention, in the waterproofing method applied to a waste disposal site or the like, a waterproofing sheet in which Sudare is embedded in an elastomer is used as a waterproofing sheet used at a location where a stress is applied in one direction. In addition, the warp direction of the slender is adjusted to the direction in which the stress is applied.

By adopting such a configuration, the presence of a strong warp prevents elongation against a known one-way stress, and prevents unevenness such as a depressed portion partially existing on the base. Can be cut along the weft.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a fiber-reinforced waterproof sheet of the present invention.

FIG. 2 is a perspective view of a main part of a sludge.

FIG. 3 is a cross-sectional view showing a state in which a lateral stress is applied to the fiber-reinforced waterproof sheet.

FIG. 4 is a sectional view of a waste disposal site.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fiber-reinforced waterproof sheet 2 Elastomer 3 Sud 4 Warp 5 Weft 10 Bottom 11 Slope

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI B29K 105: 08

Claims (3)

[Claims] 1. A fiber-reinforced water-impervious sheet used in a water-impervious construction method, wherein the fiber-reinforced water-impervious sheet is formed by embedding sludge in an elastomer. 2. A fiber-reinforced waterproof sheet according to claim 1, wherein the warp yarn has a strength of 20 kgf / cm or more, and the weft has a strength of 0.1 to 1.0 kgf / cm or less. 3. In the water-blocking method, a water-blocking sheet in which a sump is buried in an elastomer is used as a water-blocking sheet used in a place where a stress is applied in one direction, and a warp direction of the sump in a direction in which the stress is applied. Or a water-blocking method characterized by matching the weft direction.