JP3697808B2 - Water leakage management system and water leakage management method in a waste disposal site - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a water leakage management system and a water leakage management method in a waste disposal site, and in particular, manages water leakage in a double structure impermeable sheet divided into a plurality of sections installed on the bottom ground of the waste disposal site. The present invention relates to a water leakage management system and a water leakage management method.
[0002]
[Prior art]
For example, a landfill-type waste disposal site that dumps industrial waste and general waste stores landfill in a concave ground created by using natural terrain or excavating the ground. However, in order to prevent environmental pollution due to underground infiltration of sewage leached from landfilled waste, it is obliged to perform a water shielding work on the bottom ground of the disposal site in advance.
[0003]
As such a water-impervious construction, one that has been conventionally performed by laying a soft synthetic resin-based or rubber-based water-impervious sheet is known from the viewpoint of economical efficiency and water shielding.
[0004]
In addition, in order to strengthen the water shielding structure by such a water shielding sheet and prevent leakage of sewage more reliably, a drainage material is appropriately sandwiched and a water shielding sheet is laid in double, Such a double-layer water-impervious sheet is divided into a plurality of sections, and a leak detection pipe is provided in each section, and sewage is leaked or blocked by vacuum suction of the sewage through the leak detection pipe. In addition to detecting whether or not the water sheet is broken, and injecting and solidifying the injected material through the water leakage detection tube, it is known to repair the section where the damage is detected.
[0005]
And according to the method of managing the water leakage in the water shielding sheet by such vacuum suction, it becomes possible to easily repair the damaged water shielding sheet by accurately detecting the presence or absence of water leakage.
[0006]
[Problems to be solved by the invention]
However, according to the conventional method for managing leakage in the water shielding sheet by vacuum suction, when the management period is long, maintenance and management of the suction management system is not easy, and, for example, strong acid or strong alkaline leaching In the case where water leaks repeatedly, there is a problem that the suction management system may break down due to the leachate.
[0007]
Further, when such a suction management system is provided on the ground, it has a lot of power to suck the water leakage in the section of the bottom surface to the ground due to the height difference from the bottom of the disposal site. There was a problem that it was necessary and economic management could not be performed.
[0008]
Furthermore, there has been a problem that, for example, by sucking up to the dew condensation that has occurred inside the water leakage detection tube, there is a case where the reaction is too sensitive and accurate management cannot be performed.
[0009]
Furthermore, if the disposal site is large, placing a management system on the ground will increase the piping distance when repairing by injection and the pressure loss will increase, so it will be necessary to inject at a high pressure. There was a problem that the time was long.
[0010]
Therefore, the present invention has been made by paying attention to such conventional problems, and is economically and accurately double-layer water-proof sheet without being greatly affected by strong acid or strong alkaline leachate. The purpose of the present invention is to provide a water leakage management system and a water leakage management method in a waste disposal site that can perform water leakage management.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a water leakage management system according to claim 1 of the present invention is installed on an upper part of a bottom ground of a waste disposal site so as to cover the bottom ground, and a plurality of sealed compartments. A double-layered water-impervious sheet that is divided into a plurality of portions, and a plurality of base-spots that are located below the bottom portion of the bottom ground, A leakage management chamber that is installed at each upper portion and projects through the water shielding sheet and protrudes above the water shielding sheet; each section of the double structure water shielding sheet; and each water leakage management chamber; It is characterized by comprising arrangement pipes communicating with each other.
[0012]
According to the water leakage management system at the waste disposal site according to the present invention, for example, the suction pipes are sucked into each leakage management room at the time of construction of the water shielding sheet and when the waste is initially charged into the waste disposal site. By connecting the management system and performing vacuum suction, the leakage of water in each section of the water shielding sheet can be managed. After that, when leakage management is performed over a long period of time, the sewage flowing into the leakage management chamber through the installation pipe is detected by natural flow in each leakage management chamber, thereby blocking the leakage. The leakage of water in each section of the water sheet can be managed.
In this case, the leak management room may be a room-like room such as a manhole, a standing pile, or a tunnel having a doorway outside the waste disposal site. In addition, the water leakage management room is installed at the upper part of the foundation bottom located below the bottom part of the bottom ground, and more than one is scattered throughout the bottom ground. Without being influenced by the shape, the sewage can flow into each leakage control room from each section of the water shielding sheet by natural flow.
[0013]
In addition, as the arrangement pipe, a pipe having a strength not to be crushed by a load caused by waste or the like accumulated above can be used. For example, in addition to a pressure hose or a pressure tube, a vinyl chloride pipe or a stainless steel pipe It is also possible to use a pressure tube made of the like.
[0014]
The water leakage management method according to claim 2 of the present invention is installed on the upper part of the bottom ground of the waste disposal site so as to cover the bottom ground and is divided into a plurality of sealed compartments. A method for managing water sheet leakage, wherein a plurality of foundation bottoms are provided in a portion below the bottom surface of the bottom ground so as to be scattered throughout the bottom ground, and an upper portion of each foundation bottom. Each having a water leakage management chamber, the water leakage management chamber penetrating through the water shielding sheet and projecting above the water shielding sheet, and each section of the double structure water shielding sheet and each water leakage management chamber Are connected to each other through an arrangement pipe, and at the time of laying construction of the water shielding sheet and at the time of initial introduction of waste into a waste disposal site, the arrangement pipe is connected to a suction management system, Leakage of water in each section of the water shielding sheet by a suction management system And then removing the suction management system from the arrangement pipe and detecting the sewage flowing into the leakage management room through the arrangement pipe by natural flow, thereby separating each section of the water shielding sheet. It is characterized by managing the leakage of water.
[0015]
According to the water leakage management method of the present invention, at the time of constructing a water shielding sheet and at the time of initial input of waste to a waste disposal site, the arrangement pipe is connected to the suction management system in each water leakage management room, and suction management is performed. By performing vacuum suction with the system, it is possible to manage leakage of water in each section of the water shielding sheet. After that, when managing leakage for a long period of time, remove the suction management system from the installation pipe, and remove the sewage flowing into each leakage management room through the installation pipe by natural flow. By detecting, it is possible to manage leakage of water in each section of the water shielding sheet.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention, that is, examples will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional view illustrating the configuration of a water leakage management system in a waste disposal site according to this embodiment.
[0017]
That is, the waste disposal site 10 according to this embodiment is formed by excavating a vast site in a mountainous area or the like into a concave shape and leveling as an example. A double-layer water-proof sheet 13 divided into a plurality of sections, which is composed of a lower-layer water-proof sheet 11 and an upper-layer water-proof sheet 12, is laid so as to cover the bottom ground.
[0018]
And the water-impervious structure of this embodiment is formed in the bottom structure of the double-layer water-impervious sheet 13 divided into a plurality of sections and the waste disposal site 10 and is located at the bottom. A separate management pit 14 as a water leakage management room that extends upright from the position below the sheet 11 so as to penetrate the water shielding sheet 11 and a double structure water shielding sheet 13 are divided. By extending from each section and being connected to the management pit 14, one end portion thereof is configured by a management hose 15 as an arrangement pipe made of a pressure-resistant hose that opens inside the management pit 14.
[0019]
Here, the double-layer water-impervious sheet 13 has a structure as described in, for example, Japanese Patent Laid-Open No. 6-63526. As shown in FIGS. 2 and 3, for example, a soft synthetic resin system is used. Alternatively, a plurality of sheets having a size of, for example, about 200 to 1000 m ² are formed on the upper surface of the lower water-impervious sheet 11 formed by covering the ground of the bottom portion of the waste disposal site 10 with the rubber-based sheet members continuously integrated. The upper water-impervious sheet 12 is formed by laying the upper and lower water-impervious sheet 12 continuously vertically and horizontally so as to sandwich a protective mat 16 made of, for example, a nonwoven fabric.
[0020]
That is, each upper layer water-impervious sheet 12 encloses the protective mat 16, and the outer peripheral portion of the upper layer water-impervious sheet 12 is bonded to the upper surface of the lower layer water-impervious sheet 11 or the upper layer water-impervious sheet 12 installed in advance. As a result of being pressure-bonded and joined via the like, a large number of bag bodies 17 that divide the double-layer water-proof sheet 13 vertically and horizontally together with the lower-layer water-proof sheet 11 are formed as a sealed space.
[0021]
Further, a first opening 18 is provided on one side of the upper surface of each bag body 17 that partitions the water shielding sheet 13, and a second opening 19 is provided on the opposite side. The management hose 15 is connected to the first opening 18 and the second opening 19 allows air to flow from the inside of the bag body 17 to the outside, but from the outside of the bag body 17 to the inside. A degassing check valve 2 is provided to prevent the outflow of sewage.
[0022]
On the other hand, the management pit 14 is of a manhole type constructed and formed by, for example, prestressed concrete or on-site concrete on the foundation bottom 20 installed below the ground at the bottom prior to the laying work of the water shielding sheet 13. (See FIG. 1), a plurality of the bottom disposal grounds of the waste disposal site 10 are provided in a scattered manner, and the water-impervious sheet 13 is attached in the watertight state around the periphery.
[0023]
The management hose 15 has a diameter of about 10 to 20 mm, and one end thereof is connected to the first opening 18 provided on the upper surface of the bag body 17 as described above, and Extending along the upper surface, the other end portion is disposed so as to pass through the side wall portion of the management pit 14 and open into the management pit 14.
[0024]
Then, according to the water leakage management system of this embodiment provided as described above, for example, at the time of laying construction of the water shielding sheet 13 or the protective material 22 thereof, at the time of installation of leachate collection and drainage facilities, or waste At the time of initial charging into the disposal site, the end of the management hose 15 opened inside the management pit 14 is connected to a suction management system using, for example, a vacuum pump, and water leakage is managed by vacuum suction. After confirming that there is no damage to the water shielding sheet 13, remove the suction management system from the management hose 15 and detect the sewage flowing into the management pit 14 by natural flow through the management hose 15. By doing so, the presence or absence of water leakage in each section is detected.
[0025]
In addition, when water leakage is detected by a suction management system or natural flow, the injected material is injected into the bag body 17 through the management hose 15 in which the water leakage is detected, and solidified, so that the damaged section is It can also be repaired.
[0026]
The suction management system is a known system including a vacuum pump, a water quality inspection device, and the like. For example, the management system described in JP-A-7-308648 can be used in a simplified manner.
[0027]
And according to the water leakage management system of this embodiment, since the water leakage can be easily managed even after the suction management system is removed, even when the water leakage management takes a long time, the management is appropriately switched to the management by natural flow. Thus, the leakage of water in the double-layer water-proof sheet 13 can be managed economically and accurately without being affected by the strong acid or strong alkaline leachate.
[0028]
Also, the suction management system that was removed before it failed can be reused.
[0029]
In addition, this invention is not limited to the thing of the aspect of the said Example, In the range of the structure described in each claim, it can change and employ | adopt variously. For example, the water leakage management system according to the present invention is not limited to a water shielding sheet that is partitioned vertically and horizontally by a large number of bags formed by attaching an upper layer water shielding sheet to the upper surface of a lower layer water shielding sheet, but also various other double layers. It can be adopted for a water-proof sheet having a structure, and the water leakage management room may be in a tunnel shape.
[0030]
【The invention's effect】
As described above in detail, according to the water leakage management system and the water leakage management method in the waste disposal site of the present invention, when managing leakage of each sealed compartment of the double-layer water shielding sheet, In the leakage management room, the suction control system is connected to the installation pipe and vacuum suction is performed, or the sewage flowing into the leakage management room through the installation pipe is detected by natural flow. The leakage of water in each section of the seat can be managed.
In this case, each leakage management room is installed at the upper part of the foundation bottom located below the bottom of the bottom ground, so if any leakage occurs in any section of the water shielding sheet, the leakage Can flow into each leakage control room from the natural flow. Therefore, unlike the conventional one in which a water leakage management room is installed on the ground part, large power is not required, and it is possible to economically manage water leakage with small power.
In addition, at the time of construction of the water shielding sheet and at the time of initial input of waste to the waste disposal site, leakage of water in each section of the water shielding sheet is achieved by connecting a suction management system to the arrangement pipe and performing vacuum suction. In addition, when managing leaks over a long period of time, etc., in each leak management room, the sewage flowing into the leak management room through the pipes due to natural flow By detecting, it is possible to manage leakage of water in each section of the water shielding sheet. Therefore, since it is not necessary to leave the suction management system connected to the arrangement pipe for a long period of time, it is possible to prevent the suction management system from being damaged by the influence of strong acid or strong alkaline leachate.
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional view illustrating the configuration of a water leakage management system in a waste disposal site according to one embodiment of the present invention.
FIG. 2 is a cutaway cross-sectional view illustrating the structure of a double structure water-proof sheet installed on the bottom ground of a waste disposal site.
FIG. 3 is a plan view for explaining the structure of a double-structure water-proof sheet installed on the bottom ground of a waste disposal site.
[Explanation of symbols]
10 Waste disposal site 11 Lower water shielding sheet 12 Upper water shielding sheet 13 Double structure water shielding sheet 14 Management pit (leakage management room)
15 Management hose (arranged pipe)

Claims (2)

A double-layer impermeable sheet that is installed at the top of the bottom ground of the waste disposal site so as to cover the bottom ground and is divided into a plurality of sealed compartments;
A plurality of base floors provided in a scattered manner throughout the bottom ground, each of which is located below the bottom surface of the bottom ground,
A water leakage management room that is installed at the upper part of each foundation bottom plate, and each projects above the water shielding sheet and protrudes above the water shielding sheet;
A water leakage management system in a waste disposal site, characterized in that the water leakage management system comprises a disposing pipe that communicates between each section of the double-layer water shielding sheet and each water leakage management room . A method for managing leakage of a double-layer water-proof sheet that is installed on an upper part of a bottom ground of a waste disposal site so as to cover the bottom ground and is divided into a plurality of sealed compartments. ,
A plurality of foundation bottoms are provided in a portion below the bottom part of the bottom ground so as to be scattered throughout the bottom ground,
A water leakage management room is installed at the top of each foundation bottom plate, and the water leakage management room is allowed to penetrate the water shielding sheet and protrude above the water shielding sheet,
Communicating between each section of the double-layer water-impervious sheet and each water leakage management room via an arrangement pipe,
At the time of laying construction of the water shielding sheet and at the time of initial introduction of waste to a waste disposal site, the pipe is connected to a suction management system, and the suction management system allows leakage of water in each section of the water shielding sheet. Manage,
Thereafter, the suction management system is removed from the arrangement pipe, and the leakage of water in each section of the water shielding sheet is detected by detecting sewage flowing into the leakage management room via the arrangement pipe by natural flow. leakage management method in the waste disposal field and performing.

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