JPH08226115A - Water-barrier structure, water leak detection method therefor and method for repairing water leak section - Google Patents

Abstract

PURPOSE: To ensure the proper function of a water barrier, and easily detect a water leak position by forming a water impermeable layer on the bottom of an artificial pond, a waste separating yard or the like, providing a monitor lane, a collecting pipe or the like on the layer, and further providing a water-barrier sheet for the coverage thereof. CONSTITUTION: A water impermeable layer 26 made of nonwoven fabric 34 and a water-barrier sheet 36 is formed on whole surface ranging from a bottom and a slope, and a monitor lane 28 is provided on the layer 26 over entire length. Also, a plurality of collecting pipes 30 are laid, so as to be communicated to a water catchment hole 42 provided in each of divisions 4a, 4b and so forth. In addition, the pipes 30 are covered with a nonwoven cloth 50 and a water-barrier sheet 32, thereby ensuring a proper water-barrier function. Also, a water impermeable layer 48 is formed on the reverse side of a surface sheet 32 ranging over the prescribed area. Water leak, if any, due to the breakage of the sheet 32 is thereby made to flow from a leak position to the pipes 30, and subsequently detected at the lane 38. Alternatively, a sensor is provided to detect a leak position or a leak volume. According to this construction, water leak and the outflow of a harmful matter can be properly prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-impervious structure, a method for detecting water leakage and a method for repairing water leakage, and more particularly to a water-impervious structure having a water leakage prevention function for civil engineering, a method for detecting water leakage and method for repairing water leakage.

[0002]

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

For example, in artificial ponds such as dams, regulating ponds, and reservoirs, water-blocking sheets are laid on the bottom and slopes to be used for water storage. In addition, at the final disposal site of waste, a water-blocking sheet is laid at the final disposal site so that sewage discharged from the waste, etc. can be prevented from flowing out into the soil.

However, if the impermeable sheet is damaged due to some cause and water leaks, the water storage efficiency will be lowered in the artificial ponds such as dams, regulating ponds, and ponds. In particular,
At the final disposal site of waste, there is a high possibility that harmful substances will elute and flow out into the soil, contaminating groundwater, and such a situation must be prevented.

Therefore, when a water leak occurs in the impermeable sheet, it is necessary to immediately discover the water leak and specify the leak position.

Therefore, conventionally, for example, as shown in FIG. 15, a large number of linear electrodes 2 and 3 are provided above and below the water-blocking sheet 1.
Is arranged. The upper linear electrode 2 and the lower linear electrode 3 are disposed above and below the water-blocking sheet 1 so as to be orthogonal to each other in the X-axis direction and the Y-axis direction. 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. Impermeable sheet 1 as shown
The magnitude of the current flowing between the electrodes 2 and 3 is measured by changing the direction by 90 degrees above and below, and the damage position is determined from the magnitude of the current.

Further, as disclosed in Japanese Patent Laid-Open No. 4-359130, current electrodes are installed inside the final disposal site and outside the final disposal site, and a voltage is applied to these current electrodes and the current is measured. The distribution status of the electric field is judged from the above, and if water leakage occurs, the resistance will decrease and the distribution status will change.Therefore, check the water leakage and use the measurement electrodes placed in the final disposal site to determine the water leakage position. It is known to detect.

Further, as disclosed in Japanese Patent Application Laid-Open No. 6-31261, a water barrier sheet is composed of at least two layers of sheet bodies, and partition walls are provided between these sheet bodies to form a plurality of spaces between the sheet bodies. By partitioning, it was possible to know approximately which part of the wide water-blocking sheet leaked, and at the time of repair, it was possible to check the leaked point by inspecting only the relevant space part. Things are known.

Further, as disclosed in Japanese Patent Laid-Open No. 6-63525, a large number of bags are divided into a plurality of compartments, and a lower layer sheet and an upper layer sheet are welded around each of the divided compartments. The formed double-layered water-blocking sheet, with a conductive wire and a solidifying agent injection pipe inside each bag, and detecting the damage point of the water-blocking sheet from the change in the resistance value of the conductive wire and injecting the solidifying agent. It is also known that a bag is used to inject a solidifying material into a bag to repair a damaged portion.

[0010]

In the water leak detection shown in FIG. 15 described above, the linear electrode 2 is arranged on the upper surface of the water shield sheet 1, and the water shield sheet is also used. In many cases, sand or the like is laid on top of 1 to form a protective layer of the water-impervious sheet 1. In that case, when the sand or the like is leveled with a bulldozer or the like, the linear electrode 2 may be broken. If such a situation occurs, there is a problem that it is impossible to confirm the leak position. Further, if the linear electrode corrodes and breaks, the position of water leakage cannot be confirmed and maintenance is also difficult.

Further, in the water leak detection disclosed in Japanese Patent Laid-Open No. 4-359130, it is necessary to apply a high voltage to the current electrodes, and it is necessary to take measures to prevent electric shock from surroundings. When it is used in a disposal site, there is a problem that the distribution of electrodes changes depending on the type of waste, resulting in an error.

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

Further, in the water leak detection disclosed in JP-A-6-31261, a partition wall must be provided between at least two layers of sheet bodies to divide it into a plurality of spaces. It is time-consuming, and it is difficult to detect the exact location of water leakage.In addition, when repairing, the waste must be excavated and the waterproof sheet must be exposed to perform the work. There was a problem that repair work was time-consuming.

Furthermore, in the water leakage detection disclosed in Japanese Patent Laid-Open No. 6-63525, a lower layer sheet and an upper layer sheet have to be welded together to form a large number of bags, and the water shielding sheet is There is a problem that the construction work is troublesome, and the broken portion is detected and specified from the change of the resistance value due to the conductive wire, so that the conductive wire is liable to cause an abnormality such as disconnection and the maintenance work in that case is troublesome.

Further, in any of the above-described water leak detection methods, there is a problem that the water leak amount cannot be detected and the damage status cannot be confirmed.

The present invention has been made by paying attention to the above-mentioned conventional problems, and its purpose is to grasp the water leakage position and the amount of water leakage without using a high voltage, safely, and easily maintained. (EN) A water-impervious structure that can be easily repaired and that can reliably detect even after repair, a leak detection method therefor, and a leak-part repair method.

[0017]

In order to achieve the above object, the water-impervious structure according to the first invention is a water-impervious layer formed by applying an impermeable material to the surface of the water-impervious construction portion, and a water-impermeable construction. Inspection corridor formed over the entire length of the impermeable layer at a predetermined position of the part, and a plurality of water holes that extend from the inspection corridor to at least the impermeable layer of the impermeable construction part and that have water collecting holes formed at appropriate intervals And a water-blocking sheet covering the impermeable layer of the water-blocking construction part from the inspection gallery and the water-collection pipe.

In addition to the state of the first invention, the water-impervious structure according to the second invention is such that the water-impervious construction portion is composed of a bottom surface and a slope, and at least the bottom surface is the impermeable layer, the inspection corridor, It is characterized by having a water collection pipe and a water shield sheet.

In addition to the state of the first or second invention, the water-blocking structure according to the third invention is formed by applying a water-permeable material on at least the water collecting holes of the water collecting pipe on the lower surface side of the water blocking sheet. It is characterized by having a permeable layer.

The water-blocking structure according to the fourth aspect of the present invention is the first to third aspects.
In addition to the state of any one of the above aspects, the water-impermeable material forming the water-impermeable layer is formed of a water-impermeable sheet.

The water-blocking structure according to the fifth aspect of the present invention is the first to fourth aspects.
In addition to the state of any of the invention,
The feature is that there is a slope that slopes toward the audit corridor.

The water-impervious structure according to the sixth aspect of the present invention is the first to fifth aspects.
In addition to the state of any of the invention,
A plurality of partition parts partitioned by a water impermeable material are formed on the impermeable layer, and the water collecting pipe is arranged so as to penetrate the partition parts.

In the water-blocking structure according to the seventh invention, in addition to the state of the sixth invention, an inclined surface which is inclined toward the water collecting hole of the water collecting pipe is formed in the partition section. It has a feature.

According to an eighth aspect of the present invention, there is provided a method of detecting water leakage in a water-impervious structure, comprising: an impermeable layer formed by applying an impermeable material to the surface of the impermeable construction portion; An inspection corridor formed over the entire length, a plurality of water collection pipes extending from the inspection corridor at least above the impermeable layer of the water blocking construction portion, and water collecting holes formed at appropriate intervals, and the inspection corridor and A leak detection method for a water-impervious structure, comprising: a water-impermeable sheet covering a water-impervious layer of a water-impermeable construction part from above the water-collecting pipe, wherein exudate from the water-impermeable sheet is collected from a water collecting hole of the water collecting pipe It is characterized by being introduced into a pipe to detect water leakage.

According to a ninth aspect of the present invention, there is provided a method for detecting water leakage in a water-impervious structure, comprising: an impermeable layer formed by applying an impermeable material to the surface of the impermeable construction portion; and an impermeable layer at a predetermined position of the impermeable construction portion. Of the entire length of the inspection corridor, a plurality of water collection pipes extending from the inspection corridor onto the impermeable layer of the impermeable construction part, and having water collecting holes formed at appropriate intervals, the inspection corridor and the water collection pipe. A method of detecting water leakage of a water-impervious structure comprising a water-impermeable sheet covering the impermeable layer of the water-impermeable construction part from above, wherein seepage water from the water-impermeable sheet is introduced into the water collecting pipe from the water collecting hole of the water collecting pipe. It is characterized in that the exuded water that is introduced and collected by the water collecting pipe is guided to the inspection corridor by the water collecting pipe, and leak water is detected by the exuded water guided to the inspection corridor.

In addition to the state of the ninth aspect of the invention, in addition to the state of the ninth aspect of the invention, the tenth aspect of the present invention provides a method for detecting a leak in a water collecting pipe that is leaking from the inspection corridor. It is characterized by inserting and detecting the position of water leakage.

The leaked water compensating method according to the eleventh aspect of the invention is to collect water leaking from the inside of the inspection corridor after confirming the leak by the leak detecting method of the water blocking structure according to any one of the eighth to tenth aspects. It is characterized in that a water stop device is inserted in the pipe, and the water stop device injects a water stop material from the water collecting hole at the water leakage position to the lower surface side of the impermeable sheet to stop water.

In addition to the state of the eleventh aspect of the invention, in addition to the state of the eleventh aspect of the invention, the method of repairing a leaky part is to remove the water shutoff device from the inside of the water collecting pipe to empty the inside of the water collecting pipe. It is characterized by preparing for water leak detection.

[0029]

In the first aspect of the present invention having the above-described structure, the water-impervious structure has a double structure including the impermeable layer formed on the surface of the impermeable construction portion and the impermeable sheet covering the impermeable layer. As a result, the impermeable construction part can be surely impermeable, and even if the impermeable sheet should be damaged, the impermeable layer will ensure impermeable properties and prevent intrusion into the ground. It will be surely prevented.

Also, in the unlikely event of damage to the waterproof sheet,
If water seeps out from the water-blocking sheet, the water will be introduced into the water collection pipe from the water collection hole of the water collection pipe, and the water that has been introduced into this water collection pipe will be detected by a sensor or the naked eye or a camera. By using visual confirmation means such as
It is possible to reliably know the location and amount of water leakage, and since each collection pipe is connected to the audit corridor, maintenance work can be performed from inside the audit corridor without excavation from the surface. Maintenance work can be easily performed.

Further, when it is confirmed that water leaks from the impermeable sheet, it is possible to easily repair the leak position from the inside of the inspection corridor via the water collection pipe, and it is not necessary to excavate from the ground. Work can be done easily.

According to the second aspect of the invention, in the water-impervious construction part consisting of the bottom surface and the slope, at least the bottom surface is provided with the impermeable layer, the inspection corridor, the water collecting pipe, and the water-impervious sheet, so that the water impermeable construction part is formed. When the water is leaked from the water-blocking sheet, the leak position and the leak amount can be easily grasped, and the leak position can be repaired easily and surely.

In the third aspect of the present invention, the water collecting pipe is protected by providing a water permeable layer on at least the water collecting hole of the water collecting pipe on the lower surface side of the water shielding sheet, and at the same time, water seeping out from the water shielding sheet is provided. Can be surely introduced into the water collection pipe, and when water is stopped by injecting a water blocking material from the water collection hole,
It is possible to ensure the injection of the waterproof material.

According to the fourth aspect of the invention, the impermeable layer is composed of the impermeable sheet, so that the impermeable layer can be easily constructed.

In the fifth aspect of the present invention, by forming a slope inclined toward the inspection corridor in the water shielding construction portion, exuded water from the water shielding sheet introduced into the water collection pipe flows out to the inspection corridor side. By checking the water collection pipes facing the inspection corridor to see if there is any water leakage in each water collection pipe, it is possible to easily confirm the occurrence of water leakage. It is only necessary to confirm the water leakage position and the water leakage amount, and the water leakage position and the water leakage amount can be easily confirmed.

According to the sixth aspect of the invention, a plurality of partition portions partitioned by the water impermeable material are formed on the impermeable layer, and the water collecting pipe is provided so as to penetrate the partition portions, whereby the partition portions are formed. It is possible to grasp the occurrence status of water leakage for each of the cases, and to grasp the detailed occurrence status of water leakage, and moreover, by performing repairs in units of sections, more reliable repairs can be performed.

According to the seventh aspect of the present invention, the partition surface is formed with an inclined surface which is inclined toward the water collecting hole of the water collecting pipe.
Regardless of the location of the water-blocking sheet in the area of each compartment, if any leak occurs, the exudate from the water-blocking sheet can be reliably introduced into the water collection pipe, and a more reliable leak condition You can grasp.

According to the eighth aspect of the present invention, the leakage of water from the water-impervious sheet is introduced into the water collecting pipe through the water collecting hole of the water collecting pipe to detect water leakage, thereby facilitating maintenance and ensuring reliable water leakage. Detection can be performed, and the location and amount of water leakage can be easily detected by inserting detection means from the audit corridor.
Moreover, after the water leakage is detected, it can be easily and surely performed by inserting the water stopping device into the water collecting pipe from the inspection gallery and injecting the water stopping material or the like from the water collecting hole.

In the ninth invention, the exudate introduced into the water collecting pipe from the water collecting hole of the water collecting pipe is guided to the inspection corridor by the water collecting pipe, and the leakage is detected by the exuding water guided to the inspection corridor. By doing so, it is possible to easily and surely confirm the presence or absence of water leakage, and then to confirm the water leakage position and the water leakage amount for the water collection pipe in which the water leakage was confirmed, and it is possible to easily grasp the water leakage position and the water leakage amount. Moreover, it is possible to easily repair the leakage position from the inside of the inspection corridor without excavating from the ground.

In the tenth aspect of the invention, after visually confirming the exudate guided to the inspection corridor in the state of the ninth aspect of the invention, the detector is inserted into the water collecting pipe leaking from the inspection corridor. By detecting the water leakage position and the water leakage amount, it is possible to easily and reliably detect the water leakage position and the water leakage amount. In this case, the amount of water leakage can be confirmed by the seepage water led to the audit corridor.

In the eleventh aspect of the invention, after confirming the water leakage, a water stop device is inserted into the water collecting pipe leaking from the inspection corridor,
By injecting a waterproofing material from the water collection hole at the leaking position to the underside of the impermeable sheet to stop the water, it is possible to easily repair the leaking part from the inspection corridor without excavating from the ground. it can.

In the twelfth aspect of the invention, after the water blocking material is injected, the water blocking device is removed from the inside of the water collecting pipe, and the inside of the water collecting pipe is emptied to prepare for water leakage detection. Even after completing the above, the water leakage can be continuously detected, and the continuous water leakage can be surely detected.

[0043]

Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 7 are views showing a water-impervious structure of a final waste disposal site according to an embodiment of the present invention.

Waste final disposal site 10 in this embodiment
Excavates the ground surface 12 to form a bottom surface 14 and a slope 16a,
The impermeable construction part 18 made of 16b is formed. In the direction of arrow A in FIG. 1, the bottom surface 14 is in a state where the center is high and a slope is formed which descends and slopes toward both sides of the slope 16a, as shown in FIG.

The slopes 16a and 16b are the top 20 and the slope 2
The small step portion 24 is continuously formed in the middle position of 2 and is formed in an annular shape.

Then, the impermeable layer 26, the inspection corridor 28, and the water collecting pipe 30 are formed in the impermeable construction portion 18 thus formed.
And the water-blocking sheet 32 are arranged to construct a water-blocking structure.

The impermeable layer 26 is the surface of the impermeable construction part 18,
That is, the nonwoven fabric 34 is spread over the bottom surface 14 and the slopes 16a and 16b, and the water blocking sheet 36 is spread over the nonwoven fabric 34. The non-woven fabric 34 is an impermeable sheet 36.
When the surface of the water-blocking sheet 36 is applied with a certain amount of force, the water-blocking sheet 36 has a thickness and elasticity enough to absorb the force and prevent the water-blocking sheet 36 from generating sound. It is necessary. In addition, this non-woven fabric 34
Alternatively, a flexible foam material can be used.

The water-blocking sheet 36 is formed by connecting long sheets in series. The material of the water-blocking sheet 36 is not water-permeable and is flexible, for example, synthetic resin such as polyethylene (PE) ethylene vinyl acetate copolymer (EVA) or polypropylene (PP),
Synthetic rubber such as ethylene propylene diene monomer (EPDM) butyl rubber and asphalt rubber can be adopted. In addition, it is preferable to use a material that can be heat-sealed.

The inspection corridor 28 is formed over the entire length of the impermeable layer 26 at a predetermined position of the impermeable construction part 18. In the present embodiment, the inspection corridor 28 is formed at the outer peripheral position of the bottom surface 14 at the butt 22. It is composed of a slope inspection corridor 38 arranged in a ring shape along with a pair of slope inspection corridors 40 connected to the slope inspection corridor 38 of the bottom surface 14 from the ground at the center position in the width direction of the slope 16b. The inspection corridor 28 is formed in a size large enough for a worker to enter inside and perform maintenance work, etc. In the slope inspection corridor 40, as shown in FIG. Stairs are formed so that the user can climb up and down with the bottom surface 14.

The water collecting pipe 30 is connected to the impermeable layer 2 from the inspection gallery 28.
6, the bottom end 14 is located at the bottom of the slope 16a, as shown in FIG.
A plurality of parallel lines are arranged along the direction of arrow A from 8 to the central position which is the inclined top of the bottom surface 14 at a constant interval. In addition, on the slope 16a, this slope 1
The slope 16a from the slope audit hall 38 arranged at the slope of 6a
A plurality of water collecting pipes 30 are arranged in parallel at appropriate intervals up to the vicinity of the small step portion 24 along. Further, in the slope 16b, in the vicinity of both ends, from the slope tail inspection gallery 38 arranged at the slope of the slope 16b to the vicinity of the step 24 in the vicinity of both ends like the water collecting pipe 30 in the slope 16a. A plurality of water collecting pipes 30 are arranged in parallel at appropriate intervals, and in the vicinity of the central portion, a plurality of water collecting pipes 30 are arranged laterally from both sides of the slope inspection gallery 40 in parallel at a predetermined distance from the bottom surface 14 position to the step portion 2.
It is designed to be installed up to around 4. Further, water collecting holes 42 are formed in each water collecting pipe 30 at appropriate intervals, and the leaked state can be confirmed by introducing the exuded water at the time of water leakage into the water collecting pipe 30 from the water collecting holes 42. .

In the present embodiment, in order to more surely grasp the water leakage state, a plurality of partition portions 44a partitioned by the impermeable material are formed on the impermeable layer 26 on the bottom surface 14 and the slopes 16a and 16b. , B, c are formed. The partition portions 44a, 44b, 44c are formed as substantially rectangular partitions having an outer peripheral portion raised by arranging a water-impermeable material on the water-blocking sheet 36, and each partition portion 4
The water collecting holes 42 of the water collecting pipe 30 are arranged in the respective partition portions penetrating 4a, 44b and 44c.

As the impermeable material forming the partition parts 44a, 44b, 44c, for example, cohesive soil, silt, or improved soil mixed with lime, cement, bentonite or the like can be used.

Further, the partition surfaces 44a, 44b, 44c are provided with an inclined surface 4 which is inclined toward the water collecting hole 42 of the water collecting pipe 30.
6a, 46b, 46c are formed to ensure the collection of the exudate in the partition parts 44a, 44b, 44c by the water collection holes 42 of the water collection pipe 30. The inclined surface 46a of the partition portion 44a formed on the bottom surface 14 is shown in FIGS.
As shown in (1), the water collecting holes 42 of the water collecting pipe 30 are provided so as to be inclined downward from the outside toward the center, and the water collecting hole 42 of the water collecting pipe 30 is provided so as to face the center position of the partition portion 44a which is the lower end position of the tilt. It has become. The sloping surface 46a of the partition 44a is not limited to the example shown in FIGS. 4 and 7 (1), and is, for example, in a state of descending and sloping toward one side of the rectangular partition as shown in FIG. 7 (2). , The water collecting hole 42 of the water collecting pipe 30 may be arranged at a position corresponding to one side thereof,
Alternatively, as shown in FIG. 7C, a rectangular partition 44a is formed.
It is also possible to make a state of descending and sloping toward one of the corners. Further, as shown in FIGS. 7 (1) to 7 (3), the partition portion 44a may have various shapes such as a rectangular shape, a rhombic shape, or a trapezoidal shape, without being limited to a substantially square shape.

As shown in FIG. 5 (2), the partition portion of the slope 16a and the partition portions 44b near both sides thereof, the side portion located on the lower side is tilted in one direction as shown by the arrow in the figure, and is positioned at the lower end of the tilt. The water collecting hole 4 of the water collecting pipe 30 at the corner of the partition 44b
2 are arranged.

Further, the partition portion 44 at the center of the slope 16b
In c, the lower side is inclined downward to the slope inspection gallery 40, and the water collecting holes 42 of the water collecting pipe 30 are arranged at appropriate intervals along the inclined lower side, and are introduced from the respective water collecting holes 42. The exuded water is guided to the slope inspection corridor 40.

Then, as described above, the plurality of partition portions 44a, 44b, 4 partitioned by the impermeable material on the impermeable layer 26.
4c is formed, each partition 44a, 44b, 44
A water-permeable material is applied on c to form a water-permeable layer 48, and the partition 4
Inclined surface 46 formed by 4a, 44b, 44c
The spaces above a, 46b, and 46c are filled and made uniform, and then the water blocking sheet 32 is arranged so as to cover the inspection gallery 28 and the water collection pipe 30 from above. As the water permeable material, for example, sand or crushed stone can be used.

The impermeable sheet 32 is arranged on the non-woven fabric 50 after the non-woven fabric 50 is arranged on the water-permeable layer 48 so as to cover the inspection corridor 28 and the water collecting pipe 30, and is further covered with the non-woven fabric 50. It is like this. The non-woven fabric 50 is
Similar to the above-mentioned non-woven fabric 34, it is necessary that the non-woven fabric 50 has a thickness and elasticity enough to prevent damage to the water-impervious sheet 32, and the non-woven fabric 50 may be replaced with a flexible foam material. . Further, the water-impervious sheet 32 is constructed by laying a long sheet in a continuous manner similarly to the water-impermeable sheet 36 provided on the surface of the water-impervious construction portion 18.

In this way, the water shield sheet 32 on the upper side,
Since the double impermeable structure is formed by the impermeable layer 26 on the lower side, the impermeable construction portion 18 can be reliably impervious to water, and exuded water from waste or the like can be reliably obstructed. Further, by disposing the water collecting pipe 30 and the inspection corridor 28 connected thereto between the water blocking sheet 32 and the impermeable layer 26, even if the water seepage from the water blocking sheet 32 occurs, the water collecting pipe 30 It is possible to grasp the leak condition easily and surely by collecting water by
By inserting a water stop device or the like into the water collection pipe 30 from inside 8, it is possible to easily and surely repair the water leak portion.

A leak detecting method and a leak repairing method using the water blocking structure of this embodiment will be described.

First, the bottom surface 14 and the slopes 16a and 16b.
The water blocking sheet 32 is damaged in the area of each of the partition portions 44a, 44b, 44c of the water blocking sheet 3 from the damaged portion.
When exudate enters below 2, the partition parts 44a, 44
The inclined surface 46a formed by the exuded water on the partition parts 44a, 44b, 44c through the water permeable layer 48 arranged on the b, 44c,
Water permeates to 46b and 46c, and its slopes 46a and 46
The water is guided along the b and 46c to the inclined lower end, and the exuded water is introduced into the water collecting pipe 30 from the water collecting holes 42 of the water collecting pipe 30 arranged at the inclined lower end position. Therefore, when water leaks, the partition 44a,
The sloping surfaces 46a, 46b, 46c in the 44b, 44c ensure that the exudate is introduced into the water collecting pipe 30 through the water collecting hole 42.

The exudate introduced into the water collecting pipe 30 in this way is surely guided to the Hojiri inspection gallery 38 through the water collecting pipe 30 by the gradient formed on the bottom surface 14 and also to the method. In the water collection pipes 30 near both sides of the slope 16a and the slope 16b, the exudate is guided downward by the inclination angle of the slopes 16a and 16b, and is guided to the slope bottom inspection gallery 38 at the lower end position thereof, and further the slope. In the water pipe 30 in the central portion of 16b, the inclined surface 46c of the partition
The exuded water is guided to the slope inspection corridor 40. Therefore, the exudate introduced into the water collecting pipe 30 can be reliably guided to the slope inspection corridor 38 and the slope inspection corridor 40 by the slope of the water collecting pipe 30 and the bottom surface 14 and the inclined surface 46c of the partition 44c. Become.

In this state, the work personnel are regularly inspected by the auditorium 2
Whether or not water has leaked can be surely grasped by checking whether or not exudate is flowing out from the water collecting pipe 30 which has entered the inside of the inspection corridor 28 and faces the inside of the inspection corridor 28.

Next, after confirming the presence or absence of water leakage, a detecting device such as a borehole camera or an optical fiber is inserted from the inside of the inspection corridor 28 into the water collecting pipe 30 where water is leaking, and the position of the leaking water collecting hole 42 is determined. By checking, the leak position can be surely grasped. In addition, the leakage amount can be surely grasped at the same time as the leakage position is grasped.

In addition to the case where the presence or absence of water leakage is visually determined from the inside of the inspection corridor 28 as described above, each water collecting pipe 30 is used.
By previously providing a water leak detection sensor, a water pressure gauge, etc. at the position corresponding to the water collecting hole 42, it is possible to grasp the water leak position and the water leak amount in the control room or the like on the ground.

Next, after confirming the leakage position and the leakage amount of the water collection pipe 30 where the leakage has occurred, as shown in FIG.
From the inside of the inspection corridor 28, the water seal device such as the double packer 52 and the water supply material injection pipe 54 is inserted into the water collection pipe 30 where the water leak is generated, and the double packer 52 is set at the position of the water collection hole 42 where the water leak is generated. Water can be easily stopped by injecting the water stopping material into the water permeable layer 48 from the water collecting hole 42 using the water stopping material injection pipe 54. In this case, it is not necessary to excavate from the ground, and it is possible to easily and reliably stop the water at the leak point.

When injecting the water blocking material through the injection pipe 54, after injecting a predetermined amount of the water blocking material, air or water is injected into the injection pipe 54 so that the water blocking material remains in the injection pipe 54. It is possible to continuously detect the water leakage state by removing the injection pipe 54 and the double packer 52 from the water collection pipe 30 and emptying the water collection pipe 30 in preparation for the water leakage detection so as not to solidify.

FIG. 8 shows a water blocking structure according to another embodiment of the present invention.

In this embodiment, the impermeable layer 26 is not composed of the non-woven fabric 34 and the impermeable sheet 36 as in the above embodiment, but is formed of the same impermeable material as the impermeable material forming the partition 44a and the like. As a result, the construction can be performed at a lower cost than that in the above-described embodiment.

Other configurations and operations are the same as those in the above-mentioned embodiment, and the description thereof will be omitted.

FIG. 9 is a view showing a water-impervious structure according to still another embodiment of the present invention.

In this embodiment, the impermeable layer is formed of an impermeable material such as cohesive soil, silt, and improved soil as in the embodiment of FIG. 8 so that no partition is formed on the impermeable layer 26. By doing so, the construction can be performed at a lower cost than in the case of the embodiment of FIG.

Other structures and operations are the same as those in the above-mentioned respective embodiments, and their explanations are omitted.

10 and 11 are views showing modifications of the inspection corridor and the water collection pipe on the bottom surface.

In FIG. 10 and FIG. 11, the bottom surface 14 has a slope between the pair of facing slopes 60 that descends toward the center, and the inspection corridor 62 is arranged in a straight line in the center of the bottom surface. The inspection corridor 62 is reduced by arranging a plurality of water collecting pipes 30 in parallel from both sides of the inspection corridor 62 toward the slope end of the slope 60 at appropriate intervals.

FIG. 12 shows a modification of the inspection corridor of the embodiment shown in FIGS.

In this embodiment, in addition to the slope inspection corridor 38 in the embodiment shown in FIGS. 1 to 7, a small step inspection corridor 66 is annularly arranged in the small step portion 24, and the small step inspection corridor 66 is provided above. By directing the water collecting pipe 30 to the above, it is possible to detect water leakage on the slope above the small step portion 24.

FIG. 13 shows a modification of the water blocking structure on the slope.

On the slope 70, the lower drain member 72 is arranged, and the upper drain member 74 is sandwiched between the lower waterproof sheet 76 and the upper waterproof sheet 78. I am trying to set it up. In this case, it is also possible to detect water leakage by disposing a water collecting pipe between the upper water-impervious sheet 78 and the lower water-impermeable sheet 76 in the vertical direction.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.

For example, the arrangement of the inspection corridor is not limited to the above-mentioned embodiment, and various combinations can be made according to its use.

Further, the water-impervious structure of the present invention can be applied not only to the final disposal site of waste but also to regulating ponds, dams and the like.

Further, it is not limited to the case of excavating the ground surface, but can also be adopted as a water-impervious structure when heaving on the ground surface.

[0084]

As described above, according to the first aspect of the present invention, a double impermeable structure is provided by the impermeable layer formed on the surface of the impermeable construction portion and the impermeable sheet covering the impermeable layer. By adopting a structure, it is possible to perform reliable water impermeability at the impermeable construction part,
Even in the unlikely event that the impermeable sheet is damaged, the impermeable layer will ensure impermeable properties and prevent intrusion into the ground.

Also, in the unlikely event of damage to the waterproof sheet,
If water seeps out from the water-blocking sheet, the water will be introduced into the water collection pipe from the water collection hole of the water collection pipe, and the water that has been introduced into this water collection pipe will be detected by a sensor or the naked eye or a camera. By using visual confirmation means such as
It is possible to reliably know the location and amount of water leakage, and since each collection pipe is connected to the audit corridor, maintenance work can be performed from inside the audit corridor without excavation from the surface. Maintenance work can be easily performed.

Further, when leakage from the water-blocking sheet is confirmed, the leakage position can be easily repaired from the inside of the inspection corridor through the water collection pipe, and further excavation from the ground is not required, so the repair is performed. There is an effect that the work can be easily performed.

According to the second aspect of the present invention, in the impermeable construction portion consisting of the bottom surface and the slope, an impermeable layer is formed on at least the bottom surface,
By providing an inspection corridor, a water collection pipe, and a water-blocking sheet, the water-blocking construction part bottom surface can be reliably blocked, and if a leak occurs from the water-blocking sheet, the location and amount of the leak can be easily identified. Further, there is an effect that the water leakage position can be easily and surely repaired.

According to the third aspect of the present invention, by providing a water-permeable layer on at least the water collecting holes of the water collecting pipe on the lower surface side of the water shielding sheet, the water collecting pipe is protected and the water leaking from the water shielding sheet is prevented. It can be reliably introduced into the water collection pipe, and moreover, when water is stopped by injecting a water blocking material from the water collection hole,
There is an effect that the injection of the water blocking material can be ensured.

According to the fourth invention, by constructing the impermeable layer with the impermeable sheet, there is an effect that the construction work of the impermeable layer can be easily performed.

According to the fifth aspect of the present invention, the seepage water introduced from the water shielding sheet introduced into the water collecting pipe is made to flow out to the inspection corridor side by forming the slope inclined toward the inspection corridor in the water shielding construction portion. It is possible to easily confirm the occurrence of water leakage by checking the water collection pipes facing the audit corridor to see if water leakage has occurred in each water collection pipe. It is only necessary to confirm the position and the amount of water leakage, and it is possible to easily confirm the position and amount of water leakage.

According to the sixth aspect of the present invention, a plurality of partition parts partitioned by the impermeable material are formed on the impermeable layer, and the water collecting pipe is provided so as to penetrate the partition parts, whereby each partition part is formed. The effect of being able to ascertain the occurrence status of water leaks, and to understand the more minute occurrence status of water leaks, and also to perform more reliable repairs by performing repairs on a partition unit basis There is.

According to the seventh aspect of the present invention, by forming an inclined surface inclining toward the water collecting hole of the water collecting pipe in the partition, water leakage occurs at any position of the water blocking sheet in the area of each partition. Even in such a case, there is an effect that the exudate water from the water-blocking sheet can be surely introduced into the water collection pipe, and the leak situation can be more surely grasped.

According to the eighth aspect of the present invention, leakage of water from the water-blocking sheet is introduced into the water collecting pipe through the water collecting hole of the water collecting pipe to detect water leakage, thereby facilitating maintenance and reliable detection of water leakage. The location and amount of water leakage can be easily detected by inserting a detection means from the inspection corridor.After the leakage is detected, a water stop device is inserted from the inspection corridor into the water collection pipe to collect the leakage. There is an effect that it can be easily and surely performed by injecting a water blocking material or the like from the water hole.

According to the ninth invention, the exudate introduced into the water collecting pipe through the water collecting hole of the water collecting pipe is guided to the inspection corridor by the water collecting pipe, and the leak is detected by the exuding water guided to the inspection corridor. By doing so, it is possible to easily and surely confirm the presence or absence of water leakage, and then to confirm the water leakage position and the water leakage amount of the water collection pipe in which the water leakage has been confirmed, and it is possible to easily grasp the water leakage position and the water leakage amount. Moreover, there is an effect that the water leakage position can be easily repaired from the inside of the inspection corridor without excavation from the ground.

According to the tenth invention, after visually confirming the exudate led to the inspection corridor in the state of the ninth invention,
By inserting the detection device into the water collection pipe that is leaking water from the inspection corridor to detect the leak position and the leak amount, the leak position and the leak amount can be detected easily and reliably.
In this case, there is an effect that the amount of leakage can be confirmed by the seepage water guided to the inspection corridor.

According to the eleventh aspect of the invention, after the water leakage is confirmed, the water blocking device is inserted into the water collecting pipe leaking from the inspection corridor, and the water blocking material is provided from the water collecting hole at the water leaking position to the lower surface side of the water blocking sheet. By injecting water to stop the water, it is possible to easily repair the leaked part from the inside of the inspection corridor without excavating from the ground.

According to the twelfth invention, after injecting the waterproofing material,
By removing the water stop device from the water collection pipe and emptying the water collection pipe to prepare for water leak detection, it is possible to continue water leak detection even after the water stop processing at the water leak position is completed, and continued water leak detection. Is effective.

[0098]

[Brief description of drawings]

FIG. 1 is a perspective view showing a water-impervious structure in a waste disposal site according to the first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view showing an arrangement state of an inspection gallery and a water collection pipe on the bottom surface of FIGS. 1 and 2.

FIG. 4 is a partially enlarged cross-sectional view showing a water-impervious structure on the bottom surface of FIGS. 1 to 3.

5A and 5B are views showing a state of a slope without an inspection corridor according to the present embodiment, where FIG. 5A is a longitudinal sectional view thereof, and FIG.

6A and 6B are views showing a state of a slope having an inspection corridor according to the present embodiment, in which FIG. 6A is a longitudinal sectional view thereof, and FIG.

7 (1) to (3) are plan views showing a state of an inclined surface in a partition portion on the bottom surface of the present embodiment.

FIG. 8 is a view showing a water blocking structure according to another embodiment of the present invention.
It is a corresponding partial expanded sectional view.

FIG. 9 is a partial enlarged cross-sectional view corresponding to FIG. 4, showing a water blocking structure according to still another embodiment of the present invention.

FIG. 10 is a vertical cross-sectional view showing an arrangement state of an inspection corridor according to another embodiment of the present invention.

11 is a plan view of the bottom surface showing the arrangement of the inspection gallery and the water collection pipe of FIG.

FIG. 12 is a vertical sectional view showing an arrangement state of an inspection corridor according to still another embodiment of the present invention.

FIG. 13 is a vertical cross-sectional view showing a construction state of a slope surface according to another embodiment of the present invention.

FIG. 14 is a partial enlarged cross-sectional view showing a method for repairing a water leak portion according to an embodiment of the present invention.

15 (1) and 15 (2) are explanatory views showing a conventional leak detection method for detecting a leak detection state by switching electrodes.

[Explanation of symbols]

 14 Bottom surface 16a, b Slope 18 Impermeable construction part 26 Impermeable layer 28 Audit corridor 30 Water collecting pipe 32 Water impervious sheet 36 Water impervious sheet 42 Water collecting hole 44a, b, c Compartment part 46a, b, c Inclined surface 48 Water permeable Layer 52 Double packer 54 Injection tube

Claims (12)

[Claims] 1. An impermeable layer formed by applying an impermeable material to the surface of the impermeable construction part, an audit corridor formed over the impermeable layer at a predetermined position of the impermeable construction part, and the audit corridor A plurality of water collecting pipes extending at least on the impermeable layer of the water-impervious construction section and having water-collecting holes formed at appropriate intervals, and an impermeable layer of the water-impermeable construction section from the inspection corridor and the water collection pipe. A water-blocking structure that includes: a water-blocking sheet that covers. 2. The water impermeable construction part according to claim 1, wherein the impermeable construction part is composed of a bottom surface and a slope, and at least the bottom surface is provided with the impermeable layer, the inspection corridor, the water collecting pipe and the water impermeable sheet. Water-impervious structure. 3. The water-impervious structure according to claim 1, further comprising a water-permeable layer formed by applying a water-permeable material on at least the water collecting holes of the water collecting pipe on the lower surface side of the water shielding sheet. 4. The water-impervious structure according to claim 1, wherein the water-impermeable material forming the water-impermeable layer is formed of a water-impermeable sheet. 5. The water-impervious structure according to claim 1, wherein the water-impervious construction portion is formed with a slope that is inclined toward the inspection corridor. 6. The water impermeable construction part according to claim 1, wherein a plurality of partition parts partitioned by a water impermeable material are formed on the impermeable layer and penetrate the partition parts. A water-impervious structure characterized in that the water collecting pipe is provided. 7. The water-blocking structure according to claim 6, wherein an inclined surface that is inclined toward the water collecting hole of the water collecting pipe is formed in the partition portion. 8. An impermeable layer formed by applying an impermeable material to the surface of the impermeable construction part, an inspection corridor formed over the impermeable layer at a predetermined position of the impermeable construction part, and the inspection corridor. A plurality of water collecting pipes extending at least on the impermeable layer of the water shielding construction part and having water collecting holes formed at appropriate intervals, and an impermeable layer of the water shielding construction part from the inspection corridor and the water collecting pipe. A method of detecting water leakage of a water blocking structure including a water blocking sheet covering, wherein leaking water is detected by introducing water leaking from the water blocking sheet into a water collecting pipe from a water collecting hole of the water collecting pipe. Leakage detection method for impermeable structure. 9. An impermeable layer formed by applying an impermeable material to the surface of the impermeable construction part, an audit corridor formed over the impermeable layer at a predetermined position of the impermeable construction part, and the audit corridor. A plurality of water collection pipes that extend above the impermeable layer of the impermeable construction part and that have water collection holes formed at appropriate intervals, and a shield that covers the impermeable layer of the impermeable construction part from above the inspection corridor and water collection pipe. A method of detecting water leakage of an impermeable structure comprising a water sheet, wherein exudate from the impermeable sheet is introduced into a water collecting pipe from a water collecting hole of the water collecting pipe, and the water is collected by the water collecting pipe. A water leakage detection method for a water-impervious structure, characterized in that the water is guided to the audit corridor by a water collection pipe, and the leak is detected by the exudate guided to the audit corridor. 10. The water blocking structure according to claim 9, wherein after the water leakage is visually confirmed, a detecting device is inserted into a water collecting pipe leaking from the inspection corridor to detect a water leakage position. Leakage detection method. 11. A water stop device is inserted into a water collecting pipe leaking from the inspection corridor after confirming the water leak by the water leak detection method for a water blocking structure according to any one of claims 8 to 10. The method for repairing a leaked portion is characterized by injecting a waterproofing material to the lower surface side of the impermeable sheet through the water collecting hole at the leaking position to stop the water. 12. The water blocking device according to claim 11, wherein the water blocking device is removed from the water collecting pipe after the water blocking material is injected.
A method for repairing a leaked part, characterized by emptying the water collecting pipe to prepare for leak detection.