JPH07151631A - Double water barrier sheet with water leak detection system - Google Patents

Abstract

PURPOSE:To detect and repair a water leak part of a water barrier sheet quickly by partitioning the gap between upper and lower water blocking sheets into a plurality of sections using a sealing material and disposing a buffer and a water leak sensitive sensor in the gap at each section. CONSTITUTION:A lower water barrier sheet 2 is laid on a leveled ground and the seam of the sheet 2 is welded or bonded to produce one water barrier sheet. Appropriate number of sealing materials 3 are then set on the sheet 2 depending on the area before the entire area of the sheet 2 is partitioned into a plurality of sections. Subsequently, water leak sensors 4 are arranged at respective sections and connected by means of a lead wire 6. The lead wire 6 is wired carefully such that the lead wire 6 pierces the sealing material 3 with no gap. Furthermore, a buffering material 5 is laid at each section and an upper water barrier sheet 1 is laid and boded to the sealing material 3. The seam of the sheet 1 is then welded or bonded to produce one water barrier sheet.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet for use in a facility such as an industrial waste disposal site or a reservoir where water should not leak.

[0002]

[Prior Art] Aiming at perfection of water interception at a waste disposal site,
In order to reinforce the impermeable layer, a method of laying double impermeable sheets on the entire bottom surface of the repository has been adopted.

Further, there has been proposed a system in which linear electrodes are arranged on the upper surface and the lower surface of a single waterproof sheet and the damage of the waterproof sheet is detected by an electric signal from the linear electrodes.

[0004]

When a conventional water-impermeable sheet is double-laid, a thin cushioning material is inserted between the upper water-impermeable sheet and the lower water-impermeable sheet to reinforce the water impermeable layer. The water is blocked in two steps to ensure complete water blocking, and no special equipment is installed in the gap between the upper and lower water blocking sheets. Therefore, even if the upper water-blocking sheet should be damaged, there is no means for detecting it, and if the lower water-blocking sheet is damaged, there is a risk that sewage will leak. Further, in the above-mentioned system for detecting damage to the waterproof sheet, since the linear electrodes, that is, the bare wires are arranged on the upper surface and the lower surface of the waterproof sheet, the linear electrodes are always exposed to water, especially the upper surface. The linear electrode of is exposed to sewage, there is a high possibility of corrosion, and there is a high risk of transmitting an incorrect electric signal after the passage of time.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem. By utilizing the gap between the double water-impervious sheets that are laid at a corner, a water leakage sensor is installed in the gap. The purpose is to detect the damaged part of the upper water-blocking sheet and repair the detected part, or cover the soil to prevent the occurrence and outflow of water.

That is, according to the present invention, the upper water-impervious sheet and the lower water-impervious sheet are adhered to each other by a sealing material arranged vertically and horizontally, and a plurality of gaps are formed between the upper water-impermeable sheet and the lower water-impermeable sheet by the sealing material. The present invention relates to a double impermeable sheet equipped with a water leakage detection system, which is characterized in that a buffer material and a water leakage detection sensor are installed in the spaces between the divided compartments.

The main point of the present invention is that the upper water-impervious sheet and the lower water-impervious sheet are adhered by a sealing material arranged in a grid pattern to seal a plurality of gaps between the upper water-impermeable sheet and the lower water-impervious sheet. The point is to divide the room into separate rooms, and install cushioning materials and water leakage detection sensors in each of these rooms.

As a sealing material for partitioning a room, a usual relatively flexible and highly elastic synthetic resin material is used, and the partition part has sufficient water-blocking performance and is well adhered to the upper and lower water-blocking sheets. There is no risk of damaging the impermeable sheet.

As the cushioning material, a non-woven fabric or felt, which is relatively soft, has a high elasticity, and has good water permeability, is used.

In the present invention, the leak detection sensor is
Since it is installed in the gap between the upper and lower impermeable sheets that are normally dry and does not come into contact with water, there is little risk of corrosion and stable signals can be sent for a long time.

As the water leakage detection sensor, one generally used as a water leakage detection sensor is used. A typical example thereof is an electric resistance measurement type sensor in which a weak current is passed between electrodes to measure the resistance therebetween.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 shows an example of a waste disposal site using the double impermeable sheet of the present invention. (A) is a plan view, (b) is a vertical sectional view, and (c) is a part (b). FIG. This example is an example in which the double waterproof sheet of the present invention is completed at once in a field construction, and the following also describes the construction procedure.

(1) The ground is leveled due to the laying of the double waterproof sheet.

(2) The lower water-impervious sheet 2 is laid on the ground. The seam of the lower waterproof sheet 2 is welded or bonded to 1
Use one water-blocking sheet.

(3) An appropriate number of sealing materials 3 according to the area of the lower water-impervious sheet 2 are applied on the lower water-impervious sheet 2 to divide the total area of the lower water-impermeable sheet 2 into a plurality of sections. Divide into. FIG. 1A is an example in which the horizontal surface is divided into 16 sections A-1 to D-4 and the paste surface is divided into 16 sections E-1 to H-4.

(4) The water leakage sensor 4 is installed in each section,
Wire the lead wire 6. Since the lead wire 6 penetrates the sealing material 3, the lead wire 6 is wired with sufficient consideration so as not to create a gap in the penetrating portion. FIG. 1A shows the horizontal plane as A-1 to D-4.
Although the water leakage sensor 4 is installed in 6 sections and the water leakage sensor 4 is not installed on the slope, it is preferable to install the water leakage sensor 4 also on the slope.

(5) After the cushioning material 5 is laid in each section, the upper water-blocking sheet 1 is laid and the upper water-blocking sheet 1 is bonded to the seal material 3. In addition, the seam of the upper waterproof sheet 1 is welded or bonded to form one waterproof sheet.

In this way, the double waterproof sheet is completed.

When the double waterproof sheet has a large area or when the curing time of the sealing material 3 is insufficient, the double waterproof sheet is partially completed even if it is installed on site, and the double waterproof sheet is joined successively. There is no choice but to adopt construction. Further, a method of partially producing the double waterproof sheet in a factory and joining it on site to complete the sheet is preferable in terms of manufacturing cost. Such a case will be described including a construction procedure with reference to FIG.

FIG. 2 shows another example of a waste disposal site using the double water-blocking sheet of the present invention, (a) is a plan view and (b) is a plan view.
FIG. 7A is an enlarged view taken along the line AA of FIG. 7A, and FIG.

In this example, the entire disposal site is constructed by connecting four blocks A, B, C and D. The structure of the four blocks is the same, and the upper water-blocking sheet 1, the lower water-blocking sheet 2, the sealing material 3 that adheres the two to partition the gap between them into a plurality of sections, the cushioning material 5 laid in the gap between them, and the horizontal plane. It is composed of a water leak sensor 4 and a lead wire 6 installed in the compartment. Then, the upper water-impervious sheet 1 and the lower water-impervious sheet 2 are extended beyond the sealing material 3 toward the connecting portion side.

The construction procedure will be described for the case of sequential construction on site.

(1) The ground is leveled due to the laying of the double waterproof sheet.

(2) The lower water blocking sheet 2 of the A block is laid on the ground. The seam of the lower waterproof sheet 2 is welded or bonded to form one waterproof sheet.

(3) The sealing material 3 is applied on the lower water-blocking sheet 2 to divide the area of the lower water-blocking sheet 2 into one horizontal plane section and two paste plane sections.

(4) The leak sensor 4 is installed in a horizontal section and the lead wire 6 is wired. Since the lead wire 6 penetrates the sealing material 3, the lead wire 6 is wired with sufficient consideration so as not to create a gap in the penetrating portion. Although FIG. 2A shows an example in which the water leakage sensor 4 is not installed on the slope surface section, it is preferable to install the water leakage sensor 4 also on the slope surface.

(5) After laying the cushioning material 5 in each section, the upper water-blocking sheet 1 is laid while the seam of the upper water-blocking sheet 2 is welded or adhered to form one water-blocking sheet, and the sealing material 3 And the double block water-blocking sheet of A block is completed.

(6) The above steps (2) to (5) are sequentially repeated for each of the blocks B, C and D to complete the double water blocking sheet for each of the blocks B, C and D.

(7) Sealing material 3 on the connecting side of each block
The end portions of the lower water-impervious sheet 2 extending over the above are overlapped and welded or adhered to each other to form a contact surface 9 to join the lower water-impervious sheet 2.

(8) The connecting portion sealing material 8 is applied on the lower waterproof sheet 2 to divide the connecting portion into four sections 7. A water leak sensor 4 is provided in each of the four connecting section sections 7 in the same manner as (4).
Is installed, and the lead wire 6 is wired.

(9) After laying the cushioning material 5 in the connecting portion section 7 in the same manner as in (5), the end portion of the upper water-impervious sheet 1 extending beyond the sealing material 3 is superposed on the connecting portion side. The adhesion surface 10 is formed by welding or adhesion to join the upper water-impervious sheet 1 and the upper water-impervious sheet 1 is also adhered to the additionally attached connecting portion seal material 8. In this way, the double waterproof sheet in which the four blocks A, B, C and D are connected is completed. (Refer to FIG. 2 (b)) In the above, the construction method for connecting the four blocks after completing the double water-impervious sheet for each block of A, B, C, D has been described. After completing the double water-impervious sheet, the A block and the B block may be connected, and then the C block may be completed and then connected, such that they are sequentially connected.

Further, as shown in FIG. 2C, the connecting portion sealing material 11 is additionally applied to the entire area of each block connecting portion to omit the formation of the connecting portion partition 7, and the connecting portion sealing material 11 shields the upper side. The water sheet 1 and the lower water-blocking sheet 2 may be joined together. Further, instead of using the connecting portion sealing material 11, the ends of the upper water-impervious sheet 1 and the lower water-impervious sheet 2 may be sealed by welding or bonding.

In FIG. 2A, the horizontal plane of each block is shown as one section, but it goes without saying that each block horizontal plane may be divided into a plurality of sections.

Partly producing double waterproof sheet at the factory,
If the method of joining and completing on site is adopted,
It is sufficient to produce each block of (a) or a double waterproof sheet in which each block is divided into several parts at a factory and assemble it on site by the above-mentioned construction method.

In the double waterproof sheet of the present invention, the leak sensor is installed in each of the sections divided into a plurality of sections, so that the section in which the upper waterproof sheet is damaged should be immediately identified by the signal from each leak sensor. You can

In FIG. 1 and FIG. 2, an example is shown in which the sealing material 3 is vertically and horizontally arranged in a grid pattern and divided into a plurality of sections, but it may be arranged in an oblique grid pattern depending on the shape of the ground. Sometimes it may be partially curved.

[0038]

EFFECTS OF THE INVENTION Since the damaged portion of the upper water-impervious sheet can be detected promptly, the damaged portion can be immediately repaired and repaired.

[Brief description of drawings]

FIG. 1 shows an example of a waste disposal site using the double water-blocking sheet of the present invention, (a) is a plan view, (b) is a longitudinal sectional view,
(C) is a partially enlarged view of (b).

FIG. 2 shows another example of a waste disposal site using the double impermeable sheet of the present invention, (a) is a plan view, (b) is an enlarged view taken along the line AA of (a), c) is a vertical cross-sectional view of another example of the joint portion.

[Explanation of symbols]

1 ・ ・ Upper waterproof sheet, 2 ・ ・ Lower waterproof sheet, 3 ・ ・
Sealing material, 4 ・ ・ Water leak sensor, 5 ・ ・ Cushioning material, 6 ・ ・
Lead wire, 7 ... connecting section partition, 8 ... connecting section sealing material,
9 ... Lower water-blocking sheet contact surface, 10-Upper water-blocking sheet contact surface, 11 ... Connection part sealing material.

Claims (1)

[Claims] 1. An upper water-blocking sheet and a lower water-blocking sheet are bonded by a sealing material arranged vertically and horizontally, and the sealing material divides a gap between the upper water-blocking sheet and the lower water-blocking sheet into a plurality of sections. Then, a double waterproof sheet equipped with a leak detection system, characterized in that a cushioning material and a leak detection sensor are installed in the spaces between the divided sections.