JPH0910720A - Water leakage detection/repair system for water-proof sheet - Google Patents

Abstract

PURPOSE: To provide a detection/repair system which is capable of economically giving a function to specify and repair a water leaking spot to storage facilities when a waterproof sheet laid at the bottom surface of the storage facilities such as an industrial waste disposal yard or a reservior, is broken. CONSTITUTION: This water leakage detection/repair system for a waterproof sheet comprises a water shielding wall 15 which divides the bottom surface ground 13 of an industrial waste disposal yard 10 into plural sections 14, a protecting mat 16 laid on the bottom surface ground, a monitoring pipe 17 arranged on the protecting mat 16 with the one end of the pipe extended into each section, a water-permeable layer 18, and a waterproof sheet 12 to be laid in such a manner that it covers both water shielding wall and water-permeable layer from above. In addition, the monitoring pipe 17 has the other end extended to a water gathering pit 20, and samples an underground water from each section using a pump 21 and analyzes the water quality. Further, the monitoring pipe 17 detects a water leakage in the waterproof sheet and feeds an injection coagulant to the section where the water leakage occurs, using the pump 21. Thus the damaged part of the waterproof sheet is repaired.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water leakage detection / repair system for water-blocking sheets, and more particularly to a water-blocking sheet laid on the bottom ground of a storage facility such as a waste disposal site or a reservoir to cause sewage And a leak detection repair system for water blocking sheets to prevent stored water from leaking to the outside.

[0002]

2. Description of the Related Art A landfill type waste disposal site, for example, for dumping industrial waste and general waste, stores the waste in a concave ground formed by utilizing natural topography or excavating the ground. Although it will be stored in landfills, it is obligatory to carry out water shield work in advance on the bottom of the disposal site in order to prevent environmental pollution due to underground infiltration of wastewater leached from the landfill waste. As such a water barrier,
From the viewpoint of economic efficiency and water impermeability, for example, a soft synthetic resin or rubber impermeable sheet is laid. Also, on the bottom of facilities that store water in recesses such as water hazards in golf courses, simple reservoirs, ponds or fools, in order to prevent leakage of stored water, etc. Is laid.

However, these water blocking sheets may be damaged due to various factors, and there is a possibility that sewage or stored water may leak to the surrounding ground and pollute the surrounding environment. In order to deal with the problem of, for example, two layers of impermeable sheets are applied, and even if the first layer is broken,
It is considered to prevent the outflow of sewage and improve safety by using the water-impervious sheet of the second layer.

Further, by further developing this idea, the applicant of the present invention has disclosed, for example, in Japanese Unexamined Patent Publication No. 6-63525 and 63.
As shown in Japanese Patent No. 526, etc., a double-structured water-blocking sheet is divided into a plurality of sections in a water-tight manner, and even if the water-blocking sheet in one section is damaged, the water-tightness of other sections is ensured. In addition, a method has been proposed in which each damaged section is vacuum-sucked to detect water leakage to identify a damaged portion, and a solidifying material is pumped and injected into the specified section for repair.

According to this method, it is possible to detect the water leakage location with high accuracy and to repair the water leakage location quickly and easily.

[0006]

However, according to the conventional system for detecting and repairing a leaked point, which uses the above-mentioned double-structured water-blocking sheet divided into a plurality of sections, the expensive water-blocking sheet is doubled. It is costly because it will be used for, and the work of forming this double structure waterproof sheet as being divided into a plurality of appropriately sized compartments requires a lot of labor and cost. There was a problem.

Therefore, the present invention has been made in view of the above problems, and when the water-blocking sheet laid on the bottom surface of the storage facility such as a waste disposal site or a reservoir is damaged, the leakage point is It is an object of the present invention to provide a leak detection repair system for a water-blocking sheet that can economically provide a function of identifying and repairing the storage facility.

[0008]

The present invention has been made in order to achieve the above-mentioned object, and its gist is a waterproof sheet laid on the bottom ground of a storage facility such as a waste disposal site or a reservoir. It is a leak detection repair system for water-blocking sheets to prevent sewage and stored water from leaking to the outside, and the bottom ground of the storage facility is divided into multiple sections vertically and horizontally. An impermeable wall extending to be built in the bottom ground, a protective mat laid on the bottom ground in each of the divided compartments, and one end extending in each compartment to the protection mat A monitoring pipe having the other end communicating with the water absorption injection means, a water-permeable layer covering the monitoring pipe in each of the compartments and laid on the protective mat, and the water-impervious wall and the water-permeable layer. Cover from above In water shield sheet leak detection repair system characterized by comprising a water shield sheet which is laid on the bottom ground of the storage facilities in the.

Here, the impermeable wall has a water impermeability to such an extent that, when the impermeable sheet is damaged and water leaks in one compartment, the water is blocked from flowing into another compartment. It suffices if it is provided, and for example, it can be made of concrete, or can be made of cohesive soil having a high water impermeability. It should be noted that the height and width of the impermeable wall in the ground should also be such that, if a leak occurs in one section, this leak can be prevented from flowing into another section. It is designed as appropriate in consideration of soil quality, workability, economy, etc. of the ground.

The protective mat has water permeability, but has a function of preventing the injection and solidifying material such as cement bentonite from passing through. For example, a long fiber type or short fiber type non-woven fabric or other material is used. A water-permeable mat or the like can be used.

The monitoring pipe is a pipe made of stainless steel or synthetic resin which is not easily corroded even if it comes into contact with groundwater or leaked water. For example, the monitoring pipe has a hole at one end located in each compartment. The other end is extended to a management facility provided adjacent to the storage facility, for example.

The water-permeable layer is for holding a water-permeable space between the protective mat and the water-blocking sheet laid above the mat, and for example, various geotextiles or geogrids can be used. it can.

[0013]

According to the leak detection repair system for the water blocking sheet of the present invention, when a part of the water blocking sheet is damaged and the stored water or dirty water in the storage facility leaks into one section of the bottom ground. The water blocking wall blocks outflow of the leaked water to other compartments, and this leaked water is sucked through the monitoring pipe and sent to, for example, a water collecting pit adjacent to the storage facility. Therefore, by collecting and analyzing the water sent through each monitoring pipe, it is possible to detect the presence or absence of water leakage from the impermeable sheet, and to easily identify the section where the leakage point is located from the monitoring pipe where an abnormality in water quality is detected. Can be specified.

Further, when the section where the leak has occurred is specified,
If the injection solidification material is fed into the compartment through the monitoring pipe by the injection means, the injected injection solidification material is
The water-permeable space defined by the protective mat, the water-blocking sheet, and the water-blocking wall is filled with the water-permeable space of the water-permeable layer in the section, and solidifies to exert water-blocking properties, and in some cases damage the water-blocking sheet. It spouts from the section to form a solidified body with the protective sand and waste above the water-blocking sheet, and the leaked part of the water-blocking sheet is repaired by these.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. As shown in FIG. 1, as an example, the water leakage detection repair system for water-blocking sheets of this embodiment is a storage facility for a waste disposal site 10 constructed by digging a vast site in a mountainous area in a concave shape and leveling it. As waste 11 that has been dumped into the landfill 10 as landfill
It is provided to prevent sewage leaching from the ground through rainwater and the like to spread to the surrounding ground. For example, from a soft synthetic resin-based sheet member laid over the bottom ground 13 of the disposal site 10. Even if the impermeable sheet 12 is damaged due to some factor such as contact with waste having a projecting property, the damaged part can be easily detected and identified and repaired. Is.

That is, the water leakage detection / repair system for water-impervious sheets of this embodiment is mainly for dividing the bottom ground 13 of the waste disposal site 10 into a large number of compartments 14 as shown in FIG. A water-blocking wall 15 extending vertically and horizontally in the bottom ground 13 and a protection mat 16 laid on the bottom ground 13 in each of the divided compartments 14.
And one end extends into each compartment 14 and the protective mat 16
Monitoring pipe 17 arranged above and each section 14
A water-permeable layer 18 which is laid inside the protective mat 16 while covering the monitoring pipe 17, and a water-permeable sheet 12 which is laid on the bottom ground 13 so as to cover the water-permeable wall 15 and the water-permeable layer 18 from above. It is composed by.

Here, the impermeable wall 15 is, for example, the bottom ground 1
It was created by filling and solidifying, for example, cohesive soil in the groove formed by excavation in 3, and has a height of about 60 cm and a width of about 3 cm, for example.
It has a cross-sectional shape of about 0 cm and is about 2 each.
The bottom ground 13 is divided into a grid-like section 14 having a size of about 20 m in length and width by being formed by intersecting and extending a plurality of columns in the length and width at intervals of about 0 m. In addition, the impermeable wall 15 has its top end portion at the bottom ground 1
It is preferable that the protective mat 16 and the water permeable layer 18 are slightly protruded upward from the surface of No. 3 to form the structure.

The protective mat 16 is made of a long fiber type or a short fiber type non-woven fabric, has water permeability, and when an injection solidifying material such as cement bentonite is injected from the monitoring pipe 17 into the compartment 14, It is equipped with a wash-out prevention function that prevents it from passing through to the ground below. The protective mat 16 has a thickness of about 1 to 3 cm and is laid on the bottom ground 13 of each of the compartments 14 in a size matching the shape of the divided compartments 14.

Further, the monitoring pipe 17 is a hollow pipe having a diameter of about 16 mm and made of a synthetic resin such as high-density polyethylene or vinyl chloride that is resistant to corrosion, and is provided at one end thereof in each compartment 14. , A large number of holes 19
Is pierced and the groundwater and water leakage in each compartment 14
The injection and solidification material that is taken into the inside 7 and fed through the pipe 17 can be supplied and filled into the water passage space in each compartment 14. Further, as shown in FIG. 3, the monitoring pipe 17 penetrates the impermeable wall 15 and is arranged in each section 14, and the other end is disposed at the waste disposal site 1
It extends to the water collecting pit 20 provided adjacent to 0 (see FIG. 1), and inside the water collecting pit 20, the inside of the monitoring pipe 17 is sucked or the injection solidification material is pumped and injected into the monitoring pipe 17. Is in communication with the pump 21 for. In addition, as for the pump 21 as such a water absorption injection means, one pump 21 does not necessarily have to have both the water absorption function and the injection function. For example, two pumps for water absorption and injection are used, and if necessary, Therefore, the other end of the monitoring pipe 17 can be selectively communicated with each other.

Further, the water permeable layer 18 is a material excellent in strength, durability, water permeability in soil, and workability.
For example, a geotextile having a thickness of about 3 to 10 mm is sized to match the shape of the divided compartments 14 so as to cover the protective mat 16 in each compartment 14 and form a hole in the monitoring pipe 17 therebetween. It is laid so as to sandwich one end having 19 and thereby each partition 14
A water passage space is held between the protective mat 16 and the water-blocking sheet 12 inside.

Further, by covering the impermeable wall 15 which partitions the installed permeable layer 18 and the bottom ground 13 and laying the impermeable sheet 12 above these, the water leakage detection of the impermeable sheet of this embodiment is performed. Installation of the repair system is completed. The work of laying the water-impervious sheet 12 can be easily carried out by laying a plurality of water-impermeable sheets 12 divided into sizes suitable for construction at the laying site and joining and integrating them by welding or the like. .

Then, the waste 11 is dumped into the waste disposal site 10 provided with the water leakage detection and repair system in this manner, but during the disposal work or the completion of the landfill work. Later, the water-blocking sheet 12
The situation of leakage of sewage due to the damage of will be detected as follows, and the leakage location will be repaired.

That is, groundwater is sucked and collected from each section 14 into the water collecting pit 20 continuously or intermittently through the monitoring pipe 17, and the quality of the water is analyzed,
Impermeable sheet 1 by tracking rapid changes in water quality
Leakage water from 2 to the compartment 14 can be easily detected, and from the position where the monitoring pipe 17 where the groundwater with a changed water quality is collected is arranged,
It is possible to easily identify the section 14 where the water leakage has occurred, that is, the water leakage location.

When the section 14 in which the water leakage has occurred is identified, the monitoring pipe 17 in which a change in water quality has been detected.
When the injection solidifying material is pumped and injected into the compartment 14 by the pump 21 through the water, the injected solidifying material is permeable to water defined by the protective mat 16, the water blocking sheet 12, and the water blocking wall 15. The water-permeable space formed by the layer 18 is filled while removing groundwater, and when it solidifies, the water-impermeable sheet is exerted, and at the same time, a part of the injected and solidified material is ejected from the damaged portion of the water-impermeable sheet and the water-impermeable sheet 12 A solidified body is formed with the protective sand and the waste above the surface of the water, and the leaked portion of the water blocking sheet can be easily repaired by these.

Here, as the injection-solidifying material, for example, cement-based injection-solidifying material such as cement, mortar and cement bentonite, water glass-based injection-solidifying material, or urethane resin, super absorbent resin, epoxy resin, polyester A resin-based injection-solidifying material such as a resin can be used.

In the above embodiment, the waste disposal site 10
Water-blocking sheet 1 laid on the bottom ground of the storage facility
Although the case where the water leakage detection repair system of the present invention is adopted has been described for the second item, the present invention is not limited to this, and other examples such as a water hazard of a golf course, a simple reservoir, a reservoir or a pool. The same can be applied to the impermeable sheet laid in the storage facility of. Further, the waterproof sheet 12 may be double-laid if necessary.

[0027]

As described in detail above, according to the leak detection repair system for a water blocking sheet according to the present invention, a water blocking sheet for dividing the bottom ground of a storage facility in which the water blocking sheet is laid into a large number of sections. A wall, a protective mat that is laid on the bottom ground in each of the divided compartments, one end extends into each compartment and is disposed on the protective mat, and the other end communicates with the water-absorption means. Since it consists of a monitoring pipe, a water-permeable layer that covers the monitoring pipe in each compartment and is laid on the protective mat, and a water-permeable sheet that is laid so as to cover the water-impervious wall and the water-permeable layer from above, Without making the expensive waterproof sheet especially double structure,
The function of easily identifying and repairing this leaking site when the water-blocking sheet is damaged can be economically imparted to the storage facility.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing a waste disposal site that employs a water leakage detection / repair system according to an embodiment of the present invention.

FIG. 2A is a partial cross-sectional view showing an enlarged configuration of a water leakage detection repair system according to an embodiment of the present invention, and FIG.
[Fig. 3] is a partial perspective view of the same.

FIG. 3 is an explanatory view showing the arrangement of monitoring pipes.

[Explanation of symbols]

 10 Waste Disposal Site 11 Waste 12 Water Impermeable Sheet 13 Bottom Ground 14 Section 15 Water Impermeable Wall 16 Protective Mat 17 Monitoring Pipe 18 Water-permeable Layer 20 Water Collection Pit 21 Pump (Water Absorption Injection Means)

Claims (1)

[Claims] 1. A water blocking sheet for preventing leakage of sewage or stored water to the outside by damaging the water blocking sheet laid on the bottom ground of a storage facility such as a waste disposal site or a reservoir. A water leakage detection and repair system, wherein a bottom wall in each of the divided compartments is formed with a water-blocking wall formed in the bottom ground by extending the bottom ground of the storage facility into a number of compartments by extending in vertical and horizontal rows. Protective mats each laid on the ground, one end extending into each compartment and arranged on the protective mat, and the other end communicating with the water-absorption means, and a monitoring pipe in each compartment It consists of a water-permeable layer that covers the monitoring pipe and is laid on the protective mat, and a water-permeable sheet that is laid on the bottom ground of the storage facility so as to cover the water-permeable wall and the water-permeable layer from above. Characterized by Leakage detection repair system for water impermeable sheets.