JP3076518B2 - Water-blocking structure, method of detecting water-blocking, water-blocking sheet and method of repairing water-blocking part - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-blocking structure, a method for detecting water-blocking, a water-blocking sheet and a method for repairing a water-blocking portion.
In particular, the present invention relates to a water-blocking structure having a water-leakage prevention function for civil engineering, a water-leakage detection method thereof, a water-blocking sheet, and a method of repairing a water leakage portion.

[0002]

2. Description of the Related Art In recent years, a sheet waterproofing method has been widely used in civil engineering and the like.

[0003] For example, in artificial ponds such as dams, regulating ponds, reservoirs, etc., a water-impervious sheet is laid on the bottom surface and the slope to be used for storing water. In the final disposal site of waste, a waterproof sheet is laid at the final disposal site to prevent wastewater from waste and the like from flowing into the soil.

[0004] However, if the impermeable sheet is damaged for some reason and water leakage occurs, the water storage efficiency of an artificial pond such as a dam, a regulating pond or a reservoir will be reduced. In particular,
At the final disposal site of waste, harmful substances elute and flow out into the soil, and there is a high risk of contaminating groundwater and the like, and such a situation must be prevented.

[0005] Therefore, when water leakage occurs in the impermeable sheet, it is necessary to immediately detect the water leakage and specify the position of the water leakage.

For this reason, conventionally, for example, as shown in FIG.
Is arranged. The upper linear electrode 2 and the lower linear electrode 3 are disposed perpendicularly to the X-axis direction and the Y-axis direction above and below the water-impermeable sheet 1. Then, as shown in FIG. 1A, first, a plurality of lower linear electrodes 3 are switched by a switch 5 to artificially create a direction of high electrical conductivity, which is shown in FIG. Waterproof sheet 1 as shown
The magnitude of the current flowing between the electrodes 2 and 3 is measured, for example, by changing the direction by 90 degrees above and below the electrode, and the position of the damage is determined from the magnitude of the current.

Further, as disclosed in Japanese Patent Application Laid-Open No. 4-359130, current electrodes are installed in a final disposal site and outside the final disposal site, and a voltage is applied to these current electrodes to measure the current. The electric field distribution, and if there is water leakage, the resistance will decrease and the distribution will change. Is known.

Further, as shown in Japanese Patent Application Laid-Open No. Hei 6-31261, a water-impervious sheet is constituted by at least two layers of sheets, and a partition is provided between these sheets to provide a plurality of spaces between the sheets. By dividing the area, it was possible to know approximately which part of the wide impermeable sheet had leaked, and when repairing it, it was possible to check the leaked part by inspecting only the corresponding space part Things are known.

Further, as disclosed in JP-A-6-63525, a large number of bags are divided into a large number of sections, and a lower layer sheet and an upper layer sheet are welded around each of the divided sections to form a bag. A double-layered impermeable sheet is formed, and a conductive wire and a solidification material injection pipe are provided inside each bag body. A break in the water-impermeable sheet is detected and identified from the change in the resistance value of the conductive wire, and the solidification material is injected. There is also known a method in which a solidifying material is injected into a bag body by a pipe to repair a damaged portion.

[0010]

In the above-described detection of water leakage shown in FIG. 11, the linear electrode 2 is arranged on the upper surface of the water-impervious sheet 1. In many cases, sand or the like is spread over the surface 1 to form a protective layer of the water shielding sheet 1. In this case, when the sand or the like is leveled by a bulldozer or the like, the linear electrode 2 may be disconnected. When such a situation occurs, there is a problem that the position of the water leak cannot be confirmed. Further, if the linear electrode is corroded and disconnected, there is also a problem that it is impossible to confirm the water leakage position and maintenance is difficult.

In the detection of water leakage disclosed in Japanese Patent Application Laid-Open No. 4-359130, it is necessary to apply a high voltage to a current electrode. When used in a repository, there is a problem that the distribution of the electrodes changes depending on the type of waste and an error occurs.

Furthermore, there is a problem that a leak cannot be confirmed due to disconnection or the like, maintenance is difficult, and waste must be excavated during repair, which makes repair work difficult.

Further, in the detection of water leakage disclosed in Japanese Patent Application Laid-Open No. Hei 6-31261, it is difficult to accurately detect the location of the occurrence of water leakage. The construction must be performed with the sheet exposed, and there is a problem that the repair work is troublesome.

Further, in the detection of water leakage disclosed in Japanese Patent Application Laid-Open No. 6-63525, since a broken portion is detected and identified from a change in resistance value due to a conductive wire, an abnormality such as disconnection of the conductive wire is likely to occur. However, there is a problem that maintenance work in that case is troublesome.

Further, in any of the above-described methods for detecting water leakage, there has been a problem that the amount of water leakage cannot be detected and the state of damage cannot be confirmed.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a safe and easy-to-maintain water leakage without using a high voltage and to reliably ascertain a water leakage and a water leakage position. It is an object of the present invention to provide a water-blocking structure that can be repaired easily, a method for detecting water leakage thereof, a water-blocking sheet, and a method for repairing a water leakage portion.

[0017]

According to a first aspect of the present invention, there is provided a watertight structure, comprising: an inspection corridor provided in a watertight construction part; On the surface,
A plurality of water-impervious sheet sections laid in a direction away from the audit corridor around the audit corridor position and covering the surface of the water-impervious construction section, wherein each of the water-impervious sheet sections is
Like made form seals the periphery of the sheet member, each waterblocking
The inside of the seat section and the inside of the audit corridor are connected via a water collection / injection pipe.
As well as being connected, in each of the impermeable sheet sections,
An air vent tube is provided, and the air vent tube is connected to the inside of the inspection corridor.

According to the present invention, since the plurality of water-impervious sheet sections to be covered by the water-impervious construction section are formed by hermetically sealing the peripheral edges of the two sheet bodies, reliable shielding of the water-impervious construction section is achieved. Water can be supplied, and even if the upper sheet body is damaged, the lower sheet body ensures water blocking, ensuring the infiltration of leachate into the water-shielded construction area. Can be prevented.

Further, the water-impervious sheet section is sealed at the peripheral portions of the two sheet members, and the water- impervious sheet section is provided via a water collecting / injecting pipe.
Since the by connecting the internal inner and inspection gallery, by any chance water shield sheet compartment breakage or the like occurs, when water from the upper side of the sheet member is leached, the leachate was catchment through the interior of the impermeable sheet sections, collecting It can be guided to the inside of the audit corridor by the water / injection pipe, and the damaged impermeable sheet section can be confirmed without fail. Furthermore, maintenance work can be performed from the inside of the audit corridor. It can be easily performed without any work.

Further, when water leakage from the water-impervious sheet section is confirmed, a water-stopping material or the like is easily injected into the water-impervious sheet section from the inspection corridor through the water collection / injection pipe. Repair can be performed, and it is not necessary to perform work such as excavation for repair, and the repair work can be performed easily and in a short time. In this case,
By installing an air vent pipe in the seat section,
Water-blocking material was injected into the impermeable sheet section using the irrigation pipe and damaged.
When repairing the impermeable sheet section,
Inject water-stopping material while discharging air from the water sheet section
To make the injection of waterproof material easy and secure
The waterproof material can be filled all over the waterproof sheet section
Wear. The invention according to claim 2 is the method according to claim 1, wherein
The air bleeding pipe extends over substantially the entire length between the two sheet bodies.
It is characterized by being arranged. According to the invention
If the air bleed pipe runs almost the entire length of the sheet
To ensure that the air in the impermeable sheet section is
Water can be injected into the entire impermeable sheet section.
You.

The third aspect of the present invention is the first or second aspect.
In the above, the inspection corridor is buried in the water-impervious construction portion, and an upper surface portion is covered with the water-impervious sheet section.

According to the present invention, by embedding the inspection corridor in the water-impervious construction part, the entire water-impervious construction part can be covered with the water-impervious sheet section, and reliable water impermeability and water leakage management can be achieved. It can be done reliably.

The invention according to claim 4 is the invention according to claims 1 to 3.
In any case, the water-impervious construction part is constituted by a bottom surface and a slope , and the inspection corridor is disposed in a central part of the bottom surface of the water-impervious construction part in a longitudinal direction, and each of the water-impervious sheets is provided. The section is disposed over at least a part of the slope from the bottom surface of the water-impervious construction section, and is connected so as to form an independent block in the axial direction of the inspection corridor.

According to the present invention, the water-blocking sheet sections are arranged from the bottom surface of the water-blocked construction section to at least a part of the slope, and are connected so that independent blocks can be formed in the axial direction of the inspection corridor. In the case of water leakage from at least a part of the slope from the bottom of the water-impervious construction part, and if water leakage from the water-impervious sheet section occurs, water leakage in blocks independent in the axial direction It is possible to grasp the impermeable sheet section that has been made, and it is possible to reliably repair the impermeable sheet section in block units from the inspection corridor.

According to a fifth aspect of the present invention, in the fourth aspect , the water-impervious construction portion has a slope in which the bottom surface is inclined downward from the slope surface position to the inspection corridor position.

According to the present invention, when breakage occurs in the impermeable sheet section due to the slope of the impermeable section and leachate enters the impermeable sheet section, the slope follows the slope of the impermeable section. Since the impermeable sheet section is inclined, the leachate flows down to the audit corridor along the slope and can be guided to the audit corridor through the collection / injection pipe without fail. The occurrence of water leakage can be confirmed, and the leakage can be confirmed by a simple method without requiring a complicated structure for water leakage management.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, each of the water-blocking sheet sections has an uneven shape.
On both sides of a sheet-shaped core material with water holes formed at predetermined intervals
Drain that is a pressure-resistant drainage material with a water-permeable filter
And down member, characterized in that that will be formed by disposing between a pair of cushion material said two sheet bodies sandwiching the drain member from both sides.

According to the present invention, a drainage space can be reliably formed between the two sheet bodies even when a load is applied to the waterproof sheet section by the pressure-resistant drain material. If the leachate damaged sheet compartment occurs has entered into the water shield sheet, a securely leachate can be collected in the water collecting injection tube side by the drain member, be reliably confirm the leakage state it can.

Further, by sandwiching the drain material between the pair of cushion materials from both sides, the two sheet members can be protected by the cushion material, and even if an overload is applied, the sheet members are not damaged. Thus, the durability of the seepage control sheet section can be improved.

According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a water pressure gauge is provided in the water collection / injection pipe in the inspection corridor.

According to the present invention, the occurrence of water leakage in the impermeable sheet section can be automatically confirmed by the water pressure gauge disposed on the water collection / injection pipe in the inspection corridor, and the water leakage management can be made easier and more convenient. Can be assured.

[0032]

[0033]

The impermeable sheet according to the invention of claim 8 is
A pair of water-shielding sheet bodies which are arranged facing each other and the periphery of which is sealed, a pair of cushion materials which are arranged facing each other between the pair of sheet bodies, and water passage holes are formed at predetermined intervals in an uneven shape.
Permeable filters are attached to both sides of the formed sheet core
A drain material disposed between the pair of cushion members, and a drainage member connected to the drain member, one end of which is exposed from one end side of the sheet body. It is characterized by comprising a plurality of impermeable sheet sections each having an injection pipe and an air vent pipe whose one end is exposed from one end side of the sheet body and is disposed substantially over the entire length between the pair of sheet bodies. .

According to the present invention, since a pair of water-impermeable sheet members is used in the water-impermeable sheet section, even if one of the sheet members is damaged and leaching water occurs, the other sheet member does not. Water can be reliably blocked, and a water-blocking sheet having high water blocking can be obtained.

In addition, by arranging a pair of cushion members facing each other between the sheet members, the sheet members can be received by the cushion members, and the sheet members are less likely to be damaged when an overload is applied to the sheet members, and the durability is improved. Will be improved.

Further, by disposing a pressure-resistant drain material between the cushion members, a drainage space can be secured between the sheet members, and when the sheet member is damaged and leachate enters, the drain member is provided. it is possible to reliably collecting the leachate by, also, it is possible also to fill the water stop material over the entire water shield sheet compartment when injecting the water stop material.

Further, by arranging the water collection / injection pipe and the air vent pipe, it is possible to easily take out the leachate and to inject the water-stopping material. By discharging the air in the section, the water-stopping material can be reliably filled in the water-blocking sheet section when the water-stopping material is injected.

According to a ninth aspect of the present invention, there is provided a method for detecting water leakage in a water-impervious structure , comprising:
On the surface of the engineering section, the audit
Laying away from the corridor,
And a plurality of water shield sheet compartment covering surface, each Saegimizushi
The sheet compartment is formed by sealing the periphery of the two sheets.
And the inside of each waterproof sheet section and the inside of the audit corridor are gathered.
Together they are connected via a water-inlet tube, each water shield Sea
An air vent pipe is provided in the
Is a method of detecting water leakage of a water-blocking structure connected to the inside of the inspection corridor , wherein the breakage occurs when the sheet body of any of the water-blocking sheet sections among the plurality of water-blocking sheet sections is damaged. Leaching water is guided from the section into the space between the sheet bodies, and the leachate guided between the sheet bodies is moved between the sheet bodies by the inclination of the water-impregnated construction section, and the water collection / injection pipe side The leachate guided to the water collection / injection pipe side is guided to the audit corridor through the water collection / injection pipe, and the leachate guided into the audit corridor causes damage to the leachate. It is characterized in that the generated water leakage of the water-blocking sheet section is detected.

According to the present invention, the broken state can be reliably detected in the inspection corridor for each waterproof sheet section.

According to a tenth aspect of the present invention, in accordance with the ninth aspect, a water pressure gauge is installed at a water collection / injection pipe in the inspection corridor, and the water shield guided to the inspection corridor by the water collection / injection pipe. It is characterized in that leakage is detected by the water pressure of the leachate in the seat section acting on the water pressure gauge.

According to the present invention, it is possible to automatically check for water leakage in the impermeable sheet section by the water pressure gauge in the inspection corridor, and it is possible to easily and reliably perform water leakage management.

According to an eleventh aspect of the present invention, there is provided a method for repairing a water leaking portion, wherein after the water leak is confirmed by the water leak detecting method of the water shielding structure according to any one of the ninth and tenth aspects, the water stoppage material injection device is inserted into the inspection hall. and carrying a, connected to the water collecting-injection pipe of the water shield sheet compartment that occurs for leakage, or the vent line
The water blocking material is injected into the water blocking sheet section through the water collection / injection pipe by the water blocking material injection device while bleeding the air in the water blocking sheet section from the water blocking sheet section. A method for repairing a water leakage portion, wherein water is stopped by filling and solidifying a sheet section.

According to the present invention, after confirming the water leakage in the water-blocking sheet section, the water-blocking material is injected into the water-blocking sheet section from the water collection / injection pipe to fill the entire water-blocking sheet section. Thus, it is possible to easily and reliably repair the leaked portion in a short time.

[0045]

In this case, when the water-blocking material is injected into the water-blocking sheet section, the water-blocking material is injected while bleeding the air in the water-blocking sheet section from the air vent pipe. In addition to being easy, the waterproof material can be reliably filled in the entirety of the waterproof sheet section.

According to a twelfth aspect of the present invention, in the eleventh aspect , the waterproof material has a gel time sufficient to fill the inside of the waterproof sheet section.

According to the present invention, the water-stopping material can be injected until the water-stopping material is completely filled in the water-blocking sheet section, and the water-stopping material solidifies in the middle and becomes unfillable. Can be reliably prevented.

The invention according to claim 13 is the invention according to claim 11 or
12 is characterized in that the injection amount of the water-stopping material is such that a sufficient water-stopping solid can be formed around the outside of the damaged portion of the water-blocking sheet section.

According to the present invention, when the water-blocking material is injected, the water-blocking sheet section can be spread to the outside of the damaged portion, and the damaged portion can be repaired reliably to maintain the water-shielding property.

[0051]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 to FIG. 11 are views showing a state in which the impermeable structure of the present invention is used in a final waste disposal site according to one embodiment.

The final waste disposal site 10 in this embodiment has a bottom surface 14 and slopes 16a, 16b shown in FIG.
The water-impregnated construction part 18 is formed.

As shown in FIGS. 8 and 9, the bottom surface 14 is in a state in which a slope is formed in the direction of arrow A, which slopes downward from the position of the slope 16a toward the center. The slopes 16a, 16b are the slopes 16a, 16b, 16
It is a multi-stage shape in which the small step portion 20 is formed continuously between the b and 16b.

Then, the inspection corridor 22, the first water-impervious sheet 24, and the second water-impervious sheet 26 are provided in the water-impervious construction section 18 formed as described above, and the water-impervious structure is provided. I try to build.

As shown in FIG. 1, FIG. 2, FIG. 7, FIG. 8 and FIG.
The central portion, which is the lowest position of the downward inclination, is buried over substantially the entire length in the longitudinal direction, and the upper surface thereof is substantially the same height as the bottom surface 14.

Further, one end of the inspection corridor 22 is formed in a T shape as shown in FIG. 1, and the other end is exposed to the ground as shown in FIG.

Further, two drain grooves 28 are formed on the bottom surface of the inspection corridor 22 along the side wall so that water in the inspection corridor 22 can be discharged to the outside, and a ventilation pipe 30 is provided. Thus, ventilation in the inspection corridor 22 can be performed.

As shown in FIGS. 1, 2, 8, and 9, the first water-impervious sheet 24 covers the bottom surface 14 and the lowermost slope 16a of the water-impervious construction section 18, and Impermeable sheet 26
Is designed to cover from the lowermost step 20 to the uppermost step 16b.

The first impermeable sheet 24 has a plurality of impermeable sheet sections 24a. The impermeable sheet sections 24a are, as shown in FIG. And upper and lower cushion members 36, 34 disposed between the sheet members 32, 34 and facing each other.
3 and a drain material 40 disposed between the cushion materials 36, 38 and the like are laminated, and as shown in FIG. 3, a water collecting / injecting pipe 42 and an air vent pipe 44 are integrally formed. ing.

The upper and lower sheet members 32 and 34 are made of long sheets, and are made of a material having water shielding and flexibility, for example, polyethylene (PE), ethylene vinyl acetate copolymer (EVA), polypropylene ( PP) and other synthetic resin systems, ethylene propylene diene monomer (E
Synthetic rubbers such as PDM) and butyl rubber, and asphalt rubbers can be used. Preferably, a material that can be thermally fused is used.

The upper and lower cushion members 36 and 38 protect the upper and lower sheet members 32 and 34, respectively.
Even when a certain amount of force is applied to the surfaces of the sheet members 32 and 34 by the waste 74 or the like, the sheet members 32 and 34 have a thickness and elasticity enough to absorb the force and prevent breakage of the sheet members 32 and 34. It is necessary. In the present embodiment, a nonwoven fabric is used as the cushion members 36 and 38. It is also possible to use a material such as a flexible foam material instead of the nonwoven fabric.

In this embodiment, the thickness of the lower cushion member 38 is made larger than that of the upper cushion member 36.

As shown in FIG. 6, the drain material 40 is for forming a communicating portion 46 between the sheet members 32 and 34. As shown in FIG. This is a high pressure-resistant drainage material in which a water-permeable filter 52 is attached to both sides of a sheet-like core material 50 having a water passage hole 48 formed therein.

The sheet-shaped core material 50 is in a state in which a plastic sheet (high-density polyethylene sheet) formed in a regular irregular shape is covered with a polypropylene nonwoven fabric.

As the drain material 40, besides the one shown in FIG. 6, for example, it is also possible to use a state in which plastic nets are stacked to ensure water permeability.

Then, as shown in FIG.
2, 34, cushion materials 36, 38 and drain material 40
Are laminated, the peripheral portions of the upper and lower sheet members 32 and 34 are sealed, and the inside is formed as an independent communication state.

When the peripheral portions of the sheet members 32 and 34 are sealed, for example, a material of the same quality as the sheet members 32 and 34 is disposed on the peripheral portions, and the upper and lower sheet members 32 and 34 are thermally fused.
It is closed by fixing to.

The water collection / injection pipe 42 is provided in the waterproof sheet section 24.
In order to take out the infiltrated water that has entered the inside of the water-blocking sheet section 24a and to inject the water-blocking material into the water-blocking sheet section 24a, two pieces are provided at one end of the water-blocking sheet section 24a, as shown in FIG. It is in a state of being left.

Each water collecting / injecting pipe 42 is connected to the drain material 40 with one end exposed from the lower sheet 34.

The air vent pipe 44 is for discharging air from the water-impermeable sheet section 24a when the water-blocking material is injected from the water collecting / injecting pipe 42 into the water-impermeable sheet section 24a.
As shown in (2), two of the water-impervious sheet sections 24a are disposed in the longitudinally opposite side portions over substantially the entire length of the side sides.

Further, one end of the air vent pipe 44 is exposed from one end of the lower sheet member 34.

Further, the water collecting / injecting pipe 44 and the air vent pipe 44 are formed of a pressure-resistant flexible hose. The water collection / injection pipe 42 and the air vent pipe 44
The sheet body 34 on the lower side of the mounting portion is formed to be thicker than other portions in order to improve the strength of the mounting portion.

When the thus formed waterproof sheet section 24 a is to be disposed in the waterproofed portion 18, the slopes 16 a and 16 including the bottom surface 14 and the small step portion 20 are provided.
As shown in FIG. 5, a cushion material 53 having the same thickness as the lower cushion material 38 is spread over the surface of the inspection corridor 22 as shown in FIG. One end of the impermeable sheet section 24a is located, one end of the water collection / injection pipe 42 and one end of the air vent pipe 44 are connected to the inspection gallery 22 at the upper and lower parts, and the other end is separated from the bottom face 14 in a direction away from the inspection gallery 22. In addition to being laid on the slope 16a, the plurality of impermeable sheet sections 24a are connected in the axial direction of the inspection corridor 22 so that each impermeable sheet section 24a forms an independent individual block.

Similarly, at the T-shaped portion formed at one end of the inspection corridor 22, the impermeable sheet sections 24a are formed and the impermeable sheet sections 24a are interconnected. The connection between these water impermeable sheet sections 24a is to be performed by heat fusion.

The second water-impervious sheet 26 includes a sheet 32,
It is composed of a long sheet made of the same material as 34,
The first water-impervious sheet 24 and the second water-impervious sheets 26 are connected to each other by thermal fusion.

Then, the water-impregnated construction section 18
As shown in FIGS. 8 and 9, protective sand 54 is applied to a predetermined thickness on the first water-impervious sheet 24 and the second water-impervious sheet 26 covering the surface of the first water-impervious sheet 24. In addition, the protection of the second impermeable sheet 26 is provided.

As shown in FIG. 10, a drain pipe 56 is provided in the protective sand 54 to discharge leachate in the final waste disposal site 10 to a leachate reservoir 58 formed in the surroundings. After the water is treated from the leachate reservoir 58 by the water treatment facility 60, the water is discharged to the river 62 or the like.

Also, in the inspection corridor 22, FIGS.
As shown in FIG. 7, a water pressure gauge 64 is attached to the water collecting / injection pipe 42, and when the water impermeable sheet section 24a is damaged, the leachate that has entered the water impermeable sheet section 24a is collected by the water collecting / injecting pipe 42.
The water pressure acts on the water pressure gauge 64 through
Leakage can be detected. Further, a measuring cable 66 is connected to the water pressure gauge 64, and the presence or absence of water leakage can be monitored at an external management station (not shown) via the measuring cable 66.

[0080] Further, in this embodiment, so that utilizes audit査廊22 as water tank leachate from waste final disposal site 10 in an emergency.

[0081] That is, as shown in Figure 10, superintendent査廊2
2 and connected to the leachate reservoirs 58 and discharge pipe 56, as well as to be drained from the drain pipe 56 to the superintendent査廊22, to allow drainage from statutory査廊22 to leachate reservoir 58.

[0082] For example, water barrier when the upper and lower portions of the sheets 32, 34 of the seat section 24a is damaged both, superintendent through the first water shield sheet 24 much water leakage from the relationship between the pressure <br/>査廊22 In particular, during heavy rain, the amount of water leakage is large, and the amount of leachate from the final waste disposal site 10 is also large, which may exceed the capacity of the leachate reservoir 58. In this case, the first impermeable sheet and to allow one o'clock reservoir in audit査廊22 water leakage from 24.

Even if the first impermeable sheet 24 is not damaged, when there is a possibility that rainwater overflows from the final disposal site 10 due to heavy rain exceeding the design rainfall.
The audit corridor 22 is used as a water reservoir to prevent rainwater from overflowing.

Next, a method of detecting water leakage and a method of repairing a water leakage portion using the above-described water-blocking structure will be described.

First, the sheet bodies 32, 34 of any of the plurality of impermeable sheet sections 24a among the plurality of impermeable sheet sections 24a.
8, for example, as shown in FIG. 8, when there is a damaged portion 70 in the upper sheet body 32, as shown in FIG.
Leaching water enters between the sheet bodies 32 and 34 from the sheet.

The leachate that has entered between the sheet members 32 and 34 flows down to the inspection corridor 22 side as indicated by the arrow in the figure due to the gradient formed on the bottom surface 14 of the water-shielded construction portion 18.

In this case, since the upper and lower sheet bodies 32 and 34 are closed at the outer periphery and the communicating portion 46 is formed inside by the drain material 40, First impermeable sheet 24 with 70
Through the communication part 46 in the inside, it surely flows down to the inspection corridor 22 side.

In this case, since the drain material 40 is pressure-resistant, the communication portion 46 can be reliably secured without being crushed by the overload.

The inspection corridor 22 is located in the waterproof sheet section 24a.
The leachate that has moved to the side is connected to the drain material 40 and is connected to the water collection / injection pipe 42 connected to the upper surface of the inspection corridor 22.
Will be led inside.

The leachate guided into the collection / injection pipe 42 is:
It is led into the audit corridor 22 through the water collection / injection pipe 42,
Water pressure gauge 64 attached to the water collection / injection pipe 42 of the audit corridor 22
The water pressure gauge 64 detects the leakage of water from the damaged impermeable sheet section 24a.

The detection value detected by the water pressure gauge 64 is sent to an external management station (not shown) via a measurement cable 66 in the inspection corridor 22, and the management station monitors the presence or absence of water leakage.

In this case, if the value of the water pressure gauge 64 increases, there is a possibility that water leakage may occur in the waterproof sheet section 24a.
It is preferable to open the valve of the water collection / injection pipe 42 in (a) and visually check the presence or absence of water leakage.

As described above, the plurality of waterproof sheet sections 24a
By detecting the occurrence of water leakage in each block of the water shielding sheet section 24a, it is possible to detect the water leakage with a simple structure without providing a special pipe or the like.

Then, after confirming the presence or absence of water leakage, as shown in FIG. 9, a water-blocking material injection device 72 is carried into the inspection corridor 22, and one of the water-blocking sheet sections 24a where water leakage has occurred is collected. -Remove the water pressure gauge 64 from the injection pipe 42 and collect its water.
The water blocking material injection device 72 is connected to the injection pipe 42.

Then, the waterproof material is injected into the waterproof sheet section 24a through the water injection / injection pipe 42 by the waterproof material injection device 72.

At the time of the injection of the waterproof material, the inspection corridor 22
The air vent pipe 44 in the inside is opened, and a water blocking material is injected at a predetermined pressure while bleeding the air in the water blocking sheet section 24a, so that the entire water blocking sheet section 24a is filled with the water blocking material.

In this case, since the air vent pipe 44 has a length extending over the entire length of the impermeable sheet section 24a, the waterproof material is injected only from one direction of the inspection corridor end of the impermeable sheet section 24a. However, since the water-stopping material can be reliably injected into the end portion away from the inspection corridor 22, and two air vent pipes 44 are provided, it is assumed that one of the air vent pipes 44 is clogged. Also, the air in the waterproof sheet section 24a can be reliably discharged by the other air vent pipe. Further, by injecting the water-stopping material while discharging the air in the water-blocking sheet section 24a by the air vent pipe 44, the water-stopping material can be easily and reliably injected.

Here, as the water-stopping material, a material having a gel time sufficient to fill the water-stopping material in the water-blocking sheet section 24a, that is, a low-viscosity water-stopping material is used. The entirety of the water impermeable sheet section 24a can be reliably filled.

Specifically, as a water-stopping material, a material mainly composed of a hydrophilic urethane prepolymer is mixed and dispersed in water at an arbitrary ratio and melted, and directly reacts with water to form a gel, thereby forming a rubber elastic material. Uses a gel that forms a hydrous gel and exhibits a water-stopping effect.

The amount of the water-stopping material to be injected is set so that a sufficient water-stopping solid 74 can be formed around the outside of the damaged portion of the water-blocking sheet section 24a. I have.

For example, a water-stopping material having a gel time of 45 to 90 minutes is desirable, and specifically, a temperature of 20 ° C. as shown in FIG.
A gel time of about 60 minutes can be adopted under the conditions described above.
Set the number of.

After the water-stopping material is sufficiently injected into the water-blocking sheet section 24a, the water-stopping material injection device 72 is removed from the water-collecting / injection pipe 42, and the water-collecting / injection pipe 42 and the air vent pipe 44 are removed. If it is closed and solidified, the water-blocking sheet section 24a in which water leakage has occurred can be easily and quickly repaired in block units.

After repairing the seepage control sheet section 24a in which water leakage has occurred in this way, the other seepage control sheet section 24a is repaired.
When water leaks in a, repair can be easily performed by repeating the same steps as described above. Also,
Even if water leaks again after the repair, it is a rubber-like water-containing gel-like water-stop material, so by re-injecting it, a gap is formed between the water-stop material and the sheet body to remove the water-stop material. It is possible to fill.

The present invention is not limited to the above embodiment, but can be modified into various embodiments within the scope of the present invention.

For example, the arrangement state of the inspection corridor is not limited to the above-described embodiment, and various combinations are possible according to the application.

Further, the impermeable structure of the present invention can be applied to regulating ponds, dams and the like in addition to the final waste disposal site.

Further, not only when excavating the ground surface,
It can also be used as a water-blocking structure when raised on the ground surface.

[0108]

[Brief description of the drawings]

FIG. 1 is a perspective sectional view showing a waste disposal site according to an embodiment using a water impermeable structure of the present invention.

FIG. 2 is a partially enlarged perspective view showing a relationship between an inspection corridor and a waterproof sheet section in FIG.

FIG. 3 is a plan view showing a water collection / injection pipe and an air vent pipe of a water impermeable sheet section in the state of FIG. 2;

FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG.

FIG. 5 is a cross-sectional view showing a structure of a seepage control sheet section in FIG. 4;

FIG. 6 is a partial perspective view showing a state of a drain material in FIG. 5;

FIG. 7 is an enlarged vertical sectional view showing a state of an inspection hall according to the present embodiment.

FIG. 8 is a cross-sectional view showing a state of the water impermeable sheet section in the present embodiment at the time of water leakage.

FIG. 9 is a cross-sectional view showing a state at the time of repairing the seepage control sheet section from the state of FIG. 8;

FIG. 10 is a schematic diagram showing a state in which an audit corridor is used for storing water in an emergency in the present embodiment.

FIG. 11 is a characteristic diagram illustrating an example of a gel time of a water stopping material according to the present embodiment.

FIGS. 12 (1) and (2) are explanatory views showing a conventional leak detection method for detecting a water leak detection state by switching electrodes.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Final waste disposal site 14 Bottom surface 16a, 16b Slope 18 Waterproof construction part 22 Audit gallery 24 First waterproof sheet 24a Waterproof sheet section 26 Second waterproof sheet 32, 34 Sheet body 36, 38 Cushion Material 40 Drain material 42 Water collecting / injection pipe 44 Air vent pipe 46 Communication part 64 Water pressure gauge 70 Damaged part 72 Waterproof material

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-7-308648 (JP, A) JP-A-7-214026 (JP, A) JP-A-7-185496 (JP, A) JP-A-7-185496 75765 (JP, A) JP-A-6-142631 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01M 3/04 B09B 1/00 ZAB E02B 7/02

Claims (13)

(57) [Claims] An inspection corridor provided in a water-impervious construction part, and laid on a surface of the water-impervious construction part in a direction away from the inspection corridor, with the inspection corridor positioned as a center, and a plurality of water shield sheet sections covering the surface of the water shield construction unit, wherein the water barrier sheet section is made of two forms to seal the periphery of the sheet body, inside each water shield sheet sections And the inside of the audit corridor
Along with being connected via an injection pipe , an air release pipe is provided in each of the waterproof sheet sections,
A water impermeable structure, wherein the air vent pipe is connected to the inside of the inspection corridor. 2. The air vent tube according to claim 1 , wherein the air vent tube extends over substantially the entire length between the two sheet bodies.
A water-blocking structure characterized by being arranged across. 3. An apparatus according to claim 1 or 2, wherein the inspection gallery, the are embedded in the water shielding construction unit, water-impervious structure, wherein a top portion is covered with the water-impervious sheet compartment. 4. The water-impervious construction part according to any one of claims 1 to 3 , wherein the water-impervious construction part comprises a bottom surface and a slope, and the inspection corridor is formed at a central part of the bottom surface of the water-impervious construction part. And each of the seepage control sheet sections is provided over at least a part of the slope from the bottom surface of the to-be-impregnated construction part, and is connected so as to form an independent block in the axial direction of the inspection corridor. A water-blocking structure characterized by the fact that: 5. The impermeable structure according to claim 4 , wherein the impermeable construction section has a slope in which the bottom surface is inclined downward from the slope surface position to the inspection corridor position. 6. The claim 1-5, wherein the water barrier sheet compartment, passing water at predetermined intervals without an uneven
Permeate filters are installed on both sides of the sheet-shaped core material with holes.
A drain member that is pressure-resistant type of drainage material which Attach, water barrier, characterized in that that will be formed by disposing between a pair of the cushion material and the two sheets bodies sandwiching the drain member from both sides Construction. 7. A claim 1-6, the water collecting-injection pipe of the audit the corridor is water-impervious structure, wherein a pressure gauge is arranged. 8. A pair of water-shielding sheet bodies arranged face-to-face and hermetically sealed, a pair of cushion materials arranged face-to-face between the pair of sheet bodies, and water flowing at predetermined intervals with irregularities. Sheet-shaped core with holes
Pressure-resistant drainage material with a water-permeable filter attached to both sides of the material
Is, the pair of cushion material between the pinched arranged <br/> drain material, one end thereof is exposed from one end of the sheet, and the water collecting-injection pipe connected to the drain member An air release pipe having one end exposed from one end side of the sheet member and disposed substantially over the entire length between the pair of sheet members; . 9. An inspection corridor provided in a water-impervious construction part and a surface of the water-impervious construction part centered on the audit corridor position.
Laying away from the audit corridor,
A plurality of water-blocking sheet sections that cover the surface of the water application section, wherein each of the water-blocking sheet sections densely surrounds the periphery of the two sheet bodies.
The inside of each waterproof sheet section and the inside of the inspection corridor are formed by closing and forming water.
Along with being connected via an injection pipe , an air release pipe is provided in each of the waterproof sheet sections,
A method for detecting water leakage of a water-blocking structure in which the air vent pipe is connected to the inside of the inspection corridor , wherein when the sheet body of any of the water-blocking sheet sections among the plurality of water-blocking sheet sections is damaged, Guiding the leachate from the damaged portion into the space between the sheets, moving the leachate guided between the sheets into the space between the sheets due to the inclination of the water-shielded construction section,
The leachate guided to the injection pipe side, the leachate guided to the water collection / injection pipe side is guided to the audit corridor via the water collection / injection pipe, and the leachate guided to the audit corridor A method for detecting water leakage in the water-impervious structure, wherein the method detects a water-leak in the damaged water-impervious sheet section. 10. A water pressure gauge is installed on a water collection / injection pipe in the inspection corridor, and the leachate of the impermeable sheet section guided into the inspection corridor by the water collection / injection pipe is provided. By the water pressure acting on the water pressure gauge,
A method for detecting water leakage in a water-blocking structure, comprising detecting water leakage. 11. After the water leakage is confirmed by the water leakage detection method for a water shielding structure according to claim 9 or 10, a water-stopping material injection device is carried into the inspection corridor, and the water-blocking material is leaked. Connect to the water collection / injection pipe in the water sheet section, and bleed the air in the water impervious sheet section from the air vent pipe
Meanwhile, by injecting the water-stopping material into the water-impervious sheet section through the water collecting / injecting pipe by the water-stopper injecting device, filling the water-stopping material into the water-impervious sheet section and solidifying the same. A method for repairing a water leaking portion, wherein the water is stopped. 12. Oite to claim 11, wherein the water stopping material is water leakage portion repairing method characterized by having sufficient gel time to be filled with the water shield sheet compartment. 13. The method of claim 11 or 12, the injection amount of the water stopping material is characterized by a quantity which can form sufficient water stopping solidified breakage portion outside the periphery of the water shield sheet compartment leak Part repair method.