JPH06193029A - Connecting construction of waterproof sheet in waste disposal place - Google Patents

Abstract

PURPOSE:To prevent generation of defects such as crack or breakage due to large tension, insure cut-off performance of a waterproof sheet for a long term, and prevent environment contamination due to leakage of waste water. CONSTITUTION:In a waste disposal place where waste is charged in the recessed place 10 formed on the ground, the upper edge part 17 of a lower side waterproof sheet 14a stretchedly provided on the face of slope 11 of the recessed place 10 and the lower edge part 18 of an upper side waterproof sheet 14b are joined together by pressure sensitive adhesive 29. The joint part is arranged in a recess 12 in the condition of being pressed by means of a pressure tool 15.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet laying structure in which the tension applied to a waterproof sheet laid at a waste disposal site is reduced to prevent breakage of the waterproof sheet.

[0002]

2. Description of the Related Art In a waste disposal site having a large recess on the ground where waste is dumped, when rainwater permeates the dumped waste, the wastewater produced by pollution of the waste is underground. It is necessary to waterproof the wall surface of the recess in order to prevent it from invading into the room and adversely affecting the surrounding environment.
As the waterproofing work, for example, a construction method in which a waterproof sheet made of rubber or the like is stretched over the entire wall surface of the recess is adopted.

For example, as shown in FIG. 3, a rubber waterproof sheet 14 is stretched over the entire inner surface of a recess 10 formed in the ground. The slopes 11 of the recesses 10 are formed with recesses 12 oriented in a substantially horizontal direction at predetermined intervals in the vertical direction, and the recesses 12 rise upward toward the center of the recesses 10. A shoulder 13 is formed, and a waterproof sheet is provided in the recess 12.
Concrete U-shaped groove that acts as a retainer through 14
The waterproof sheet 14 is stretched without sagging, and the waste 16 is dumped in the recess 10 in this state. Waste water flowing out from the waste disposal site is a drain pipe (not shown) connected to the U-shaped groove 15 of the depression 12.
The sewage is guided to the conditioned land of the water treatment facility and purified by activated sludge.

[0004]

However, as the amount of waste 16 dumped in the recess 10 increases, the downward frictional force acting between the waterproof sheet 14 and the waste 16 increases and the waterproof sheet increases. Tension was generated in 14 and the waterproof sheet 13 may be damaged by this tension.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an improvement of a waterproof sheet connecting structure for a waste disposal site which overcomes the above problems, and in a waste disposal site for discarding waste in a recess formed on the ground. , The lower edge of the upper waterproof sheet is laid on the upper edge of the lower waterproof sheet stretched on the slope of the recess, the joining surface of the overlapping section is joined with an adhesive, and the joining section is pressed down. It is characterized by being fixed with a tool. In the present invention, the large tension applied to the waterproof sheet stretched on the slope of the concave portion causes the lower waterproof sheet to move downward relative to the upper waterproof sheet at the waterproof sheet connecting portion bonded with the adhesive. By doing so, the tension applied to the waterproof sheet is reduced and the occurrence of defects such as cracks and breaks is suppressed.

As described above, according to the present invention, a waterproof sheet in which the upper waterproof sheet and the lower waterproof sheet are bonded to each other with an adhesive is stretched on the inner side surface of the waste dumping recess, so that the dumped waste is discarded. Since the tension of the waterproof sheet that sinks in the ground due to the weight is absorbed by the misalignment of the overlapping margin of the joint portion, defects such as cracks and fractures do not occur in the waterproof sheet, and the waterproof performance of the waterproof sheet is ensured for a long period of time. As a result, the environment will not be deteriorated by the sewage leaked from the waste disposal site.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIG. 1 will be described. The upper edge 17 of the lower rubber waterproof sheet 14a is located above the upper surface of the horizontal shoulder 13 over the recess 12 over the entire slope 11 of the recess 10 dug in the ground and the surface of the recess 12. As described above, the lower waterproof sheet 14a is stretched from the bottom of the slope 11 without a gap, and an adhesive is applied over the entire upper surface of the lower waterproof sheet 14a located above the recess 12 to form an adhesive layer 19
Forming an adhesive layer near the upper edge 17 of the lower waterproof sheet 14a.
The lower edge portion 18 of the upper rubber waterproof sheet 14b is applied to and joined to 19, and the concrete U-shaped groove 15 is placed and fixed on the joint portion on the recess 12.

A waste disposal site can be constructed by sequentially reversing such work from the bottom of the slope 11 of the recess 10 upward.

In the embodiment shown in FIG. 1, since the edges 17 and 18 of the upper and lower waterproof sheets 14 are superposed in the depression 12 and the concrete U-shaped groove 15 is placed on the joint, the waterproof sheet 14 is wrinkled. It is possible to tightly stretch the waterproof sheet 14 on the slope 11 of the recess 10 without doing so, and to firmly bond the overlapping joint portions of the upper and lower waterproof sheets 14 without being peeled by the weight of the U-shaped groove 15. it can.

Further, the amount of the waste 16 dumped in the recess 11 increases, and the downward friction force acting between the waste 16 and the waterproof sheet 14 causes the lower waterproof sheet 14a to move downward relative to the upper waterproof sheet 14b. Even if tension is applied in the direction of dragging to the lower side, the upper edge 17 of the lower waterproof sheet 14a shifts downward while being in close contact with the lower edge 18 of the upper waterproof sheet 14b by the adhesive layer 19, so that the waterproofness of the waterproof sheet 14 is reduced. The tension acting on the waterproof sheet 14 is greatly reduced, the cracks and breakage of the waterproof sheet 14 are prevented in advance, and the sewage exuding from the waste material 16 permeates into the water. To be prevented.

Further, as shown in FIG. 2, a waterproof sheet
A non-woven fabric 20 or a polyethylene sheet made of a material having a small friction coefficient may be attached to the lower surface of the upper edge 17 of the lower waterproof sheet 14a and the upper surface of the lower edge 18 of the upper waterproof sheet 14b at the joint of 14. , In this embodiment, the waterproof sheet 14
By reducing the frictional force between the dent 12 and the dent 12, the tension of the waterproof sheet 14 can be reduced more reliably.

[Brief description of drawings]

FIG. 1 is a lateral cross-sectional view of an essential part illustrating an embodiment of a waterproof sheet connection structure according to the present invention.

FIG. 2 is a cross-sectional view of a main part of another embodiment in which a joint part is sandwiched between nonwoven fabrics or a protective sheet.

FIG. 3 is a cross-sectional view showing a conventional waterproof sheet laying structure.

[Explanation of symbols]

10 ... Recess, 11 ... Slope, 12 ... Recess, 13 ... Horizontal shoulder, 14 ... Waterproof sheet, 15 ... U-shaped groove, 16 ... Waste, 17 ... Upper edge, 18 ...
Lower edge, 19 ... Adhesive layer, 20 ... Non-woven fabric.

Claims (1)

[Claims] 1. A lower edge of an upper waterproof sheet on an upper edge of a lower waterproof sheet stretched on a slope of the recess in a waste disposal site for dumping waste in a recess formed on the ground. A waterproof sheet connection structure for a waste disposal site, characterized in that the parts are overlapped, the bonding surface of the overlapped part is bonded with an adhesive, and the bonding part is fixed with a retainer.