JP4316086B2 - Method for detecting damage location of impermeable structure at waste disposal site in water area - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is mainly waters, upon storing the waste waters such as lakes and rivers, which can detect the sewage leak location from waste, damage position detection of water-impervious structure of waste disposal sites in the body of water Regarding the method .
[0002]
[Prior art]
Conventionally, waste disposal sites built on land have been designed to cover waste with a waterproof sheet to prevent sewage from the waste from leaking to the outside. There is a possibility that the seat may be damaged, and there is a risk that the maintenance of the living environment may be hindered.
[0003]
Therefore, in order to reliably detect leakage of sewage from waste and prevent leakage of sewage to the outside in a waste disposal site, the present invention relates to a leakage position detection method and a leakage position detection device in a final disposal site for waste. Japanese Patent Laid-Open No. 7-21837 is known. That is, the present invention is a method for detecting a leakage position in a final disposal site for waste that stores waste inside the impermeable layer and keeps it isolated from the external ground. A double structure that intervenes, defines multiple rows of water passages that run in parallel in the X direction and the Y direction across the water passage, and sends the water to the water passage in the X direction and passes through this water quality By checking the sewage for each route, it is monitored whether there is sewage leakage from the waste. If any water quality abnormality is found in any of the water passages in the X direction, stop the water supply in the X direction and By checking the quality of the water that has passed through and passed through the water path, it is possible to grasp the water path that shows an abnormality in the water quality in the Y-direction water path, and the water quality in the X and Y directions is abnormal. As an area where sewage leak occurred Is obtained by characterized by constant, performs a water stop treatment water shield sheet or the like in the identified sewage leakage occurrence location.
[0004]
In addition to the above-mentioned invention, a water-proof sheet is generally used as a water-impervious construction for a waste land disposal site that has been constructed a lot in the past. Currently, various water-proof sheets and their breakage detection systems have been developed. Has been.
[0005]
However, as the amount of waste increases in the future, land disposal sites will not be able to handle them. The actual situation is that an effective water-blocking structure and a method for detecting a damaged portion in a waste disposal site have not yet been established.
[0006]
[Problems to be solved by the invention]
The present invention can prevent leakage of sewage from the waste to the outside in the water impermeate at the waste disposal site in the water area, and can easily grasp the water leak position, i.e., the damage position of the water impermeate, To provide a method for detecting the location of damage to water-impervious structures at waste disposal sites in water .
[0007]
[Means for Solving the Problems]
In the present invention, a water shielding work is erected adjacent to the waste stored in the water area, a number of detection chambers are formed in the water shielding work, and a detection liquid having an appropriate property is placed in each of the detection rooms. Injecting water, detecting changes in the water quality of the detection liquid in each detection chamber, and detecting the damage location of the impermeable construction by detecting the difference from the water quality of the normal detection liquid. Water waste that consists of a method for detecting the damage position of the water structure, and in that case the level of the detection liquid injected into each detection chamber formed in the impervious work is less than the low tide level of stagnant water around the impervious work Consists of a method for detecting damage to water-impervious structures at disposal sites.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0009]
FIG. 1 is a plan view of a standing water-impervious work 1 constituting a water-impervious structure in a waste treatment plant according to the present invention. A large number of detection chambers 2 are formed in the front-rear and left-right directions. Further, in the plan view of FIG. 2, a number of detection chambers 2 are formed in a standing water-impervious construction 1 made of a steel pipe sheet pile 5 as in FIG. 3 is a schematic side sectional view of FIGS. 1 and 2.
[0010]
That is, a large number of detection chambers 2 are formed in the above-described multiple-type standing water-impervious work 1 in the front-rear and left-right directions, and the detection liquid 3 is injected into each of these detection chambers 2. Filled soil 9 is inserted between the impervious works 1, and the bottom treatment 12 is applied to the bottom of each standing impervious work 1, and the bottoms are joined to the impermeable layer 10 and constructed in this way. The waste 4 is accommodated inside the water-impervious structure, and the upper part of the impermeable layer 10 is a permeable layer 11.
[0011]
Next, FIG. 5 which is a plan view of FIG. 4 and a side sectional view thereof shows a standing water-impervious construction 1 composed of straight sheet piles 6. The chambers 2 are formed, the detection liquid 3 is injected into each of the detection chambers 2, and the waste 4 is stored inside the standing water-impervious work 1 as in FIG. 3.
[0012]
An enlarged plan view of one unit of the detection chamber 2 including the straight sheet pile 6 of FIG. 4 is shown in FIG. 6. A male joint portion 7 is provided at one end of the linear sheet pile 6 and the other end is provided at the other end. The female joint part 8 joined to it is provided.
[0013]
The standing water-impervious work 1 may be a multiple-type or a single-row type as described above, and its constituent members have shapes other than the straight sheet pile 6 and the steel pipe sheet pile 5 as described above. However, various materials such as synthetic resin, metal, and concrete can be used as the material.
[0014]
Next, the detection liquid 3 to be injected into each of the detection chambers 2 is selected as appropriate, particularly in comparison with the properties of stagnant water in the vicinity of the standing water-impervious work 1 and is detected from the outside. It is preferable to make it easy to enter the chamber 2. For example, if the surrounding stagnant water is seawater, the detection liquid 2 is fresh water, and the water level W of the detection liquid 3 filled in the detection chamber 2 is outside the standing water-impervious work 1 as shown in FIGS. By setting the peripheral stagnant water below the level of the low tide, it becomes easy to enter the detection chamber 2.
[0015]
Furthermore, the change in the water quality of the detection liquid 3 injected into each of the detection chambers 2 can be periodically detected. As a means for that purpose, for example, the detection liquid 3 is periodically used by using a sampling pipe or the like. They are collected and investigated for changes in their properties.
[0016]
That is, in the water shielding structure of the present invention, the properties of the detection liquid 3 injected into each of the detection chambers 2 are selected in comparison with the properties of the stagnant water around the outside of the standing water shielding work 1 As described above, when seawater exists in the stagnant water and fresh water is used for the detection liquid 3, leakage from the standing impermeable work 1 can be detected by detecting the salt concentration of the detection liquid 3.
[0017]
In addition to the above, it is possible to use a mixture of the detection liquid 3 with a dye or a tracer.
[0018]
Furthermore, in order to grasp the steady change of the detection liquid 3 due to the surrounding environment, a reference well is provided where there is no influence of the leachate from the waste 4, and the detection liquid 3 is filled therein and the change in its properties is grasped. Then, by comparing with the detection liquid, it can be determined whether the detection liquid itself is due to a change in properties or due to damage to the water shielding structure.
[0019]
Moreover, as an example of a method that can be applied to detect a change in the water quality of the detection liquid 3 other than the above, the tracer substance flows out of the detection chamber 2 when the standing impermeable work 1 is damaged. There is also a method of detecting damage to the standing water-impervious work 1 by collecting and measuring the water quality outside the chamber 2 and confirming the difference from the water quality outside the normal detection chamber 2.
[0020]
As another example of the method, when the standing water-impervious work 1 is damaged and the tracer substance flows out from the detection chamber 2, the concentration of the tracer substance in the detection chamber 2 decreases. By confirming the difference from the concentration of water, damage to the standing impermeable work 1 is detected. In this method, it is not necessary to use a tracer substance, and any substance that does not exist outside the detection chamber 2 may be used.
[0021]
That is, the above detection methods can be summarized as follows: determination based on a change in the water quality of the detection liquid 3 in the detection chamber 2, and detection method based on the presence of a substance that was not in the initial detection liquid 3, or the initial detection liquid The detection method based on the decrease in the concentration of the substance in 3, and the substance that was not detected outside the detection chamber 2 and that was in the detection liquid 3 was detected outside the detection chamber 2. It is a method of judging by changes in water quality.
[0022]
Next, each embodiment of the water shielding structure in the waste disposal site of the water area which consists of said standing water-impervious construction 1 is demonstrated.
[0023]
FIG. 7 shows an example in which a double standing water-impervious work 1 is constructed inside a rubble-type revetment consisting of rubble 14 and waste 4 is stored inside thereof. FIGS. 8 and 10 are double-cutting sheet piles. Fig. 11 is a side sectional view of Fig. 10 and Fig. 8 is a side cross-sectional view of an example of different water-impervious structures in which a standing impermeable work 1 is constructed inside a type of revetment and waste 4 is stored inside. A triple-type standing water-impervious construction 1 is constructed inside the revetment made up of the filling soil 9, and FIG. 10 and 11 show the waste 4 stored inside the sheet pile type revetment of the standing water-impervious construction 1 itself, which is a combination of the steel pipe sheet pile 5 and the straight sheet pile 6. In FIGS. The water level W of the chamber 2, the detection liquid 3, the impermeable layer 10, and the detection liquid 3 is shown.
[0024]
In addition, when there is a change in the water quality of the detection liquid 3 injected into each detection chamber 2 of the above-mentioned standing water-impervious work 1, the solidifying agent, water-impervious material and concrete are immediately filled with an injection pipe. In order to ensure the water-imperviousness of the standing water-impervious work 1, and when the interior of the standing water-impervious work 1 is to be dry, an operator or machine is put inside to repair the damaged part. Assumed to be performed.
[0025]
【The invention's effect】
According to the water-impervious structure in the waste disposal site in the water area according to the present invention described above, leakage of sewage from waste stored inside to the outside can be prevented in advance. The damage position and water leakage position can be easily grasped by the structural damage position detection method, and the solidification agent and water shielding are applied to the entire detection chamber in the standing water shielding work against such damage and water leakage position. After filling a material, concrete, or the like or drying the detection chamber, an operator or machine can be put in the detection chamber to easily repair the damaged portion.
[0026]
Further, if the number of sheet pile layers forming the standing water-impervious work is increased, the water shielding effect can be improved accordingly, and if the number of detection chambers is increased, the damage position can be detected more precisely.
[Brief description of the drawings]
FIG. 1 is a plan view of a standing water-impervious construction composed of straight sheet piles constituting a water-impervious structure of the present invention.
FIG. 2 is a plan view of a standing water-impervious construction made of a steel pipe sheet pile constituting the water-impervious structure of the present invention.
FIG. 3 is a schematic side sectional view of the water shielding structure of FIGS. 1 and 2;
FIG. 4 is a plan view of a standing water-impervious construction composed of the straight sheet piles of the present invention.
FIG. 5 is a side sectional view of FIG. 4;
6 is an enlarged plan view of one unit of the detection chamber composed of the straight sheet piles of FIG. 4. FIG.
FIG. 7 is a side sectional view of an embodiment in which the present invention is applied to the inside of a rubble revetment.
FIG. 8 is a side sectional view of another embodiment in which the present invention is applied to the inner side of a revetment made of medium-filled soil.
FIG. 9 is a side sectional view of still another embodiment in which the present invention is applied to the inside of a revetment made of caisson.
FIG. 10 is a plan view of another embodiment different from the above in which the present invention is applied to a sheet pile type revetment of a standing water-impervious construction itself combining a steel pipe sheet pile and a straight sheet pile.
11 is a side sectional view of FIG.
[Explanation of symbols]
1 Standing impermeable construction 2 Detection chamber 3 Detection liquid 4 Waste W Water level

Claims (1)

  Establishing a water shielding work adjacent to the waste stored in the water area, forming a number of detection chambers within the water shielding work, injecting a detection liquid with appropriate properties into each of the detection rooms, Damage to the water-impervious structure at the waste disposal site in the water area, which detects changes in the water quality of the detection liquid in the detection chamber and detects the damage location of the impermeable work by detecting the difference from the water quality of the normal detection liquid Position detection method.

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