JP3600482B2 - Equipment for preventing and purifying liquid leakage to the supporting ground of industrial facilities - Google Patents

Description

[0001]
TECHNICAL FIELD The present invention relates to a device for preventing and purifying liquid from leaking into a support ground of a foundation of an industrial facility.
[0002]
[Prior art]
For example, in a facility such as a final waste disposal site, harmful substances emitted from waste may diffuse into the ground over a long period of time and contaminate the soil, and as a means for solving such inconvenience, conventionally, for example, Hazardous substances from waste do not penetrate into the ground by laying a waterproof sheet on the foundation ground of the facility.
[0003]
On the other hand, if the soil is contaminated, it may be possible to track and grasp the harmful substances in the ground and completely remove them.However, such a method is not easy to completely remove, and the land valuation is also difficult. There are also high risks such as losses due to a decline in costs, rising construction costs for remediation measures for contaminated soil, prolonged construction periods, and a decline in social credibility.
[0004]
[Problems to be solved by the invention]
With the method of merely laying a water-impervious sheet on the foundation ground, if the sheet is damaged, harmful substances penetrate into the soil, and it has been difficult to reliably prevent soil contamination by harmful substances.
[0005]
An object of the present invention is to solve the disadvantages of the conventional example, to reliably prevent harmful substances contained in solvents and the like used in facilities from penetrating into the ground, and furthermore, this means for preventing liquid leakage It is an object of the present invention to provide a device for preventing and purifying liquid leakage from a supporting ground of an industrial facility, which can be easily incorporated as a liquid leakage countermeasure work in the construction stage of constructing a foundation and can be economically constructed by a labor-saving method.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention firstly provides a liquid leakage prevention / purification device which is incorporated as a liquid leakage countermeasure prior to the construction process of foundation crushed stone and discarded concrete which is a foundation ground for direct foundation of an industrial facility. The floor-excavated surface is dug in a grid at predetermined intervals to form a liquid collecting groove, and a liquid leakage prevention sheet is laid on the entire surface of the excavating bottom including the liquid collecting groove, and the liquid collecting groove is formed. The gist of the present invention is that a liquid collecting pipe is laid on the crushed stone and crushed stone is filled thereon.
[0007]
Secondly , there is a liquid leakage prevention / purification device to be incorporated as a liquid leakage countermeasure work prior to the construction process of foundation crushed stone and discarded concrete, which is a foundation foundation of pile foundation of an industrial facility, and the floor after the foundation pile is driven. The excavated surface is deeply digged, a poorly permeable soil base is formed in the deeply digged portion, a liquid collecting groove is provided in the poorly permeable soil base, and a liquid leakage prevention sheet is provided on the entire surface of the excavated bottom including the liquid collecting groove. And a liquid collecting pipe is laid in the liquid collecting groove, and crushed stones are filled thereon.
[0008]
Third, the liquid collecting pipe is provided on the outer peripheral portion of the base and communicates with a liquid collecting pit connected to equipment such as a purification device and a processing tank.
[0009]
Fourth, the liquid leakage prevention sheet has a gist that a nonwoven fabric is lined up and down with synthetic rubber.
[0010]
Fifth, the liquid collecting pit has a vertical shape and is formed in a human hole into which a person enters.
[0011]
Sixth, the gist is to provide a stabilized soil layer between the liquid leakage prevention sheet and the crushed stone.
[0012]
Seventh, waterproofing is performed on the peripheral surface of the foundation pile within the impervious soil foundation. Eighth, the impervious soil foundation is formed by adding a solidifying material such as cement to the locally generated soil. It is a summary.
[0013]
According to the first aspect of the present invention, when a harmful substance leaks from a facility, the leaked liquid flows through a crushed stone layer having a high coefficient of permeability during the foundation work, and a liquid collecting pipe in a collecting groove is formed. To be collected. In this case, since a liquid leakage prevention sheet is laid on the entire surface of the excavated bottom including the liquid collecting groove, it is possible to prevent liquid leakage containing harmful substances from penetrating into the foundation ground, and furthermore, to diffuse the liquid leakage into the ground. It can be collected at the initial stage just before going. In addition, although the liquid leakage prevention sheet has a low coefficient of friction, the liquid collecting groove acts as a shearing key by being laid on the entire surface of the excavated bottom including the liquid collecting groove as described above, so that the sliding in the horizontal direction can be performed. Increases resistance and ensures facility safety.
[0014]
According to the second aspect of the present invention, when a harmful substance leaks from a facility, the leaked liquid flows through a crushed stone layer having a high permeability in the foundation groundwork, and a liquid collecting pipe in a liquid collecting groove. To be collected. In the case of a pile foundation, the floor was excavated with the floor after the foundation pile was driven, and the excavated surface was further deepened, and a poorly permeable soil base was formed in the deeply digged portion. It is possible to prevent the leaked liquid from penetrating the periphery of the driven pile.
[0015]
And, since the leak prevention sheet is laid on the entire bottom surface of the excavation including the collecting ditch, it is possible to prevent the leak containing the harmful substance from penetrating into the foundation ground, and to diffuse the leak into the ground. It can be recovered at the initial stage just before going. Further, although the liquid leakage prevention sheet has a low coefficient of friction, by laying it on the entire surface of the excavation bottom including the liquid collecting groove as described above, the sliding resistance in the horizontal direction increases, and the stability of the facility can be secured.
[0016]
According to the third aspect of the present invention, in addition to the above operation, the liquid collected in the liquid collecting pipe is provided on the outer peripheral portion of the base and connected to equipment such as a purification device or a processing tank. It can be treated reliably by further collecting.
[0017]
According to the fourth aspect of the present invention, in addition to the above-described operation, the liquid leakage prevention sheet can be prevented from being damaged by crushed stones because the nonwoven fabric is lined on the self-healing water-blocking sheet.
[0018]
According to the fifth aspect of the present invention, in addition to the operation of the third aspect of the present invention, the liquid collecting pit is formed in a vertical shape and formed in a human hole into which a person enters, so that the liquid collecting pit is formed in the human hole. By periodically observing and chemically analyzing the accumulated leachate, it is possible to detect leaks at an early stage, and to take prompt measures such as repairing leaks. In addition, visual inspection such as a clogged state of the liquid collection tube can be easily performed.
[0019]
According to the present invention as set forth in claim 6, in addition to the above-described functions, by providing a stabilized soil layer between the liquid leakage prevention sheet and the crushed stone, the deterioration of the liquid leakage prevention sheet due to heat, ultraviolet rays, ozone, and the like is prevented. To prevent expansion and contraction of the liquid leakage prevention sheet due to changes in temperature.
[0020]
According to the present invention as set forth in claim 7, in addition to the above-described operation, in the case of a pile foundation, the liquid leakage prevention sheet is cut at this point by penetrating the liquid leakage prevention sheet. Water leakage along the pile surface is achieved by disposing a swelling water-stopping material such as bentonite inside the poorly permeable soil base or by installing a rubber water-stop ring on the periphery. Can be prevented from penetrating into the ground.
[0021]
According to the present invention as set forth in claim 8, in addition to the above functions, the poorly permeable soil base is formed by adding a solidifying material such as cement to the locally generated soil, thereby using the excavated residual soil for durability and durability. Not only can it form a high-quality water-impervious ground with excellent impact resistance, but it can also serve as a base to protect the liquid leakage prevention sheet with sufficient support force and a smooth surface, as well as collapse of the slope and back pressure on the liquid leakage prevention sheet To prevent.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional front view showing a first embodiment of a device for preventing and purifying liquid leakage to a supporting ground of an industrial facility of the present invention, FIG. 2 is a plan view of the same, and FIG. One embodiment is a liquid leakage prevention and purification device provided on a foundation ground business of a direct foundation of a facility 1 such as a waste disposal site. In the figure, reference numeral 2 denotes a base bottom plate, and a floor-excavated floor surface 3 is provided. The liquid collecting grooves 4 are provided in a lattice shape, and a liquid leakage prevention sheet 5 is laid on the entire excavation bottom surface including the liquid collecting grooves 4.
[0023]
This liquid leakage prevention sheet 5 is a set of a rubber sheet 5a with upper and lower nonwoven fabrics 8 as shown in FIG. 4 (a) or two sheets as shown in FIG. 4 (b). Is laid with non-woven fabric.
[0024]
Then, a liquid collecting tube 6 is laid at the bottom in the liquid collecting groove 4 on which the liquid leakage preventing sheet 5 on which the nonwoven fabric 8 is lined is laid. The liquid collecting tube 6 was, for example, a perforated tube using hardened vinyl chloride as a material, and crushed stone 7 was filled on the liquid collecting tube 6.
[0025]
In this case, the liquid collecting tube 6 and the crushed stone 7 may be directly arranged on the liquid leakage prevention sheet 5 on which the nonwoven fabric 8 is coated as described above, but as shown in FIG. You may make it provide the stabilization processing soil layer 9 which has moderate intensity | strength by improvement etc. This stabilization treatment soil layer 9 prevents deterioration of the liquid leakage prevention sheet due to heat, ultraviolet rays, ozone, and the like, and reduces expansion and contraction of the liquid leakage prevention sheet due to a change in temperature.
[0026]
A plurality of liquid collecting pits 12 are formed at the outer periphery of the foundation and formed in a human hole into which humans enter into the inside in a plurality of positions, in the example shown in the drawing, at two opposing positions, and the liquid collecting pit 12 is provided at the bottom of the liquid collecting pit 12. 6, the collection pit 12 is connected to a purification device 13 such as a purification device or a processing tank different from the facility 1.
[0027]
The liquid collecting pipe 6 is provided with a hydraulic gradient which is inclined downward toward the liquid collecting pit 12 so that the liquid is easily collected in the liquid collecting pit 12 by the natural flow of the liquid.
[0028]
Next, a construction method of such a liquid leakage prevention and purification device will be described. The liquid leakage prevention and purification device of the present invention is to be incorporated into the construction process of the basic crushed stone 10 and the discarded concrete 11 which is the foundation ground business of the direct foundation as a countermeasure for liquid leakage when constructing the facility 1, After the flooring surface 3 is excavated with a floor, the flooring surface 3 is further dug in a grid at predetermined intervals to provide a liquid collecting groove 4.
[0029]
A liquid leakage prevention sheet 5 overlaid with a nonwoven fabric 8 is laid on the entire bottom surface of the excavation including the liquid collecting groove 4. In this case, the leakage prevention sheet 5 is stuck along the excavation slope prior to the construction of the crushed stone layer for backfilling so that the leachate does not leak from the base bottom plate 2 to the outside. In the figure, reference numeral 14 denotes crushed stone.
[0030]
If necessary, a stabilized soil layer 9 is provided in the collecting groove 4, a collecting pipe 6 is laid, and crushed stone 7 is filled thereon, and the collecting pipe 6 is connected to a collecting pit 12.
[0031]
After taking measures to prevent liquid leakage in the foundation ground business in this way, the foundation crushed stone 10 and the discarded concrete 11 are constructed, the foundation bottom plate 2 is constructed, and the facility 1 is constructed thereon.
[0032]
In a facility where such a liquid leakage prevention and purification device is provided directly on the foundation, when an organic or heavy oil-based harmful substance leaks, it penetrates the layers of the basic crushed stone 10 and the crushed stone 7 and flows into the liquid collecting groove 4. I do. In this case, fluids such as large amounts of rainwater and groundwater during a typhoon may flow intensively through the layer of foundation crushed stone 10 with high permeability during foundation work, which is a problem in the management of construction sites and operating facilities. It is being verified from the experience of Therefore, the harmful substances flowing out of the facility 1 also attempt to impregnate the ground with the layers of the basic crushed stone 10 and the crushed stone 7 flowing horizontally. By laying the liquid prevention sheet 5, it is collected in a perforated liquid collecting pipe 6 laid in the liquid collecting groove 4 immediately before the liquid is diffused into the ground. In case of a large amount of liquid leakage, the material for backfilling shall be crushed stone and the space shall have a function of temporary storage.
[0033]
The harmful substances collected in the liquid collecting pipe 6 are collected in the liquid collecting pit 12 by natural flow due to a hydraulic gradient. Therefore, if the leachate accumulated inside the liquid collection pit 12 is periodically observed and chemically analyzed, the leakage of harmful substances is detected early. If a periodic investigation shows that harmful substances are leaking, by performing inspections and inspections inside the facility, etc., it is possible to quickly repair the leaked part inside the facility at the initial stage of liquid leakage. The liquid collecting pit 12 can be operated and repaired for several decades. The clogging of the liquid collecting tube 6 can be performed by entering the liquid collecting pit 12 for visual inspection and repair work.
[0034]
The harmful substances in the liquid collection pit 12 are collected in a purification device 13 such as a purification device or a treatment tank, and are treated here.
[0035]
The liquid leakage prevention sheet 5 is laid on the entire bottom surface including the liquid collecting groove 4 by digging the floor surface 3 so that even if the liquid leakage prevention sheet 5 itself has a low coefficient of friction, it can slide in the horizontal direction. Since the resistance can be increased, the stability of the facility 1 and the entire substructure can be secured.
[0036]
FIGS. 6 to 11 show a second embodiment, which is a device for preventing and purifying liquid provided in a foundation foundation of a pile foundation of the facility 1, wherein 15 denotes a foundation pile, and a foundation pile 15 is cast. The floored surface 3 excavated with a floor is dug deep, and a poorly permeable soil base 16 is formed in the thick part of the depth.
[0037]
The poorly permeable soil base 16 is formed by adding a solidifying material such as cement to locally generated soil such as excavated soil, and the water permeability can be set to 10 ⁻⁶ cm / s or less by mixing the solidifying material.
[0038]
The liquid collecting grooves 4 are provided in a grid pattern on the poorly permeable soil base 16, and the liquid leakage prevention sheet 5 is laid on the entire excavation bottom surface including the liquid collecting grooves 4. In this case, since the head of the foundation pile 15 protrudes upward from the poorly permeable soil base 16 as shown in FIG. 11, the liquid leakage prevention sheet 5 is cut at the location of the foundation pile 15. Therefore, at the joint between the foundation pile 15 and the liquid leakage prevention sheet 5, an adhesive is applied to the outer peripheral portion of the foundation pile 15, and the liquid leakage prevention sheet 5 is attached to the foundation pile 15 to ensure watertightness.
[0039]
Further, a waterproofing operation is performed on the peripheral surface of the foundation pile 15 in the poorly permeable soil base 16. In this waterproofing work, for example, as shown in FIG. 9, a swellable waterproofing material 17 such as bentonite is arranged around a foundation pile 15, or a rubber waterproofing ring 18 is provided as shown in FIG. .
[0040]
The stabilization soil layer 9 is provided on the liquid leakage prevention sheet 5, the liquid collecting pipe 5 is disposed in the liquid collecting groove 4, the crushed stone 7 is filled in the liquid collecting groove 4, and the liquid collecting pipe 5 is collected. The structure of connecting to the pit 12 and connecting the liquid collecting pit 12 to the purification equipment 13 for processing is the same as that of the first embodiment.
[0041]
Next, a construction method of such a liquid leakage prevention device will be described. The liquid leakage prevention device of the present invention is to be incorporated into the construction process of foundation crushed stone 10 and discarded concrete 11, which is the foundation foundation of the pile foundation, as a leakage prevention measure when constructing the facility 1, and to construct the foundation pile. The process of excavating the flooring surface 3 after flooring 15 is the same as the conventional foundation work. After the excavation with flooring, the flooring surface 3 is further dug deeper by about 1 m further downward, and a poorly permeable soil base 16 is constructed in a layer thickness of 1 m corresponding to the deep excavation. At this time, a waterproofing work is constructed around the foundation pile 15.
[0042]
Before the hardly permeable soil base 16 hardens and develops the initial strength, a cloth is dug here to provide the liquid collecting groove 4. Thereafter, the steps of installing the liquid collecting pipe 5, the liquid collecting pit 12, and the purification facility 13 and the steps of installing the basic crushed stone 10 and the discarded concrete 11 are the same as those in the first embodiment.
[0043]
【The invention's effect】
As described above, the device for preventing and purifying liquid leakage to the supporting ground of an industrial facility according to the present invention is used in an initial stage when a harmful substance contained in a solvent or the like used in the facility tries to penetrate into the ground. This can be treated at an early stage, and measures such as facility repairs can be taken at an early stage, so that soil pollution can be reliably prevented, and the natural environment and living environment can be prevented from being destroyed. The liquid leakage prevention means can be installed as a measure against liquid leakage at the construction stage of constructing the foundation of the facility, and can be carried out labor-saving and economically.
[Brief description of the drawings]
FIG. 1 is a vertical sectional front view showing a first embodiment of a device for preventing and purifying liquid leakage to a support ground of an industrial facility according to the present invention.
FIG. 2 is a plan view showing a first embodiment of a device for preventing and purifying liquid leakage to a supporting ground of an industrial facility according to the present invention.
FIG. 3 is a longitudinal sectional front view of a main part showing a first embodiment of a device for preventing and purifying liquid leakage to a supporting ground of an industrial facility of the present invention.
FIG. 4 is a vertical sectional front view of a liquid leakage prevention sheet used in a device for preventing and purifying liquid leakage to a supporting ground of an industrial facility according to the present invention.
FIG. 5 is a vertical sectional front view showing another example of a liquid collecting groove portion which is a main part of the first embodiment of the device for preventing and purifying liquid leakage to the supporting ground of an industrial facility of the present invention.
FIG. 6 is a longitudinal sectional front view showing a second embodiment of a device for preventing and purifying liquid leakage to a supporting ground of an industrial facility of the present invention.
FIG. 7 is a plan view showing a second embodiment of a device for preventing and purifying liquid leakage to a support ground of an industrial facility according to the present invention.
FIG. 8 is a longitudinal sectional front view of a main part showing a second embodiment of a device for preventing and purifying liquid leakage to a support ground of an industrial facility of the present invention.
FIG. 9 is a vertical sectional front view of an essential part of a foundation pile showing a second embodiment of a device for preventing and purifying liquid from leaking to a support ground of an industrial facility of the present invention.
FIG. 10 is a longitudinal sectional front view showing another example of a main part of a foundation pile showing a second embodiment of a device for preventing and purifying liquid from leaking into a support ground of an industrial facility of the present invention.
FIG. 11 is a partial perspective view showing a second embodiment of a device for preventing and purifying liquid leakage to a supporting ground of an industrial facility according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Facility 2 ... Direct base bottom plate 3 ... Floor surface 4 ... Liquid collecting groove 5 ... Liquid leakage prevention sheet 5a ... Rubber sheet 6 ... Liquid collecting pipe 7 ... Crushed stone 8 ... Non-woven fabric 9 ... Stabilized soil layer
10: Foundation crushed stone 11: Discarded concrete
12: Liquid collection pit 13: Purification equipment
14 ... crushed stone 15 ... foundation pile
16… Small permeable soil base 17… Swellable waterproof material
18… water stop ring

Claims (8)

A industrial facilities prior to leakage built providing leakage prevention and purification apparatus as a countermeasure Engineering in construction process of the concrete discarded based crushed stone is the basis Chigyo direct basis, a floor with excavated surfaces at predetermined intervals A liquid collecting groove is provided by digging in a lattice shape, a liquid leakage prevention sheet is laid on the entire bottom surface of the excavation including the liquid collecting groove, a liquid collecting pipe is laid in the liquid collecting groove, and crushed stone is filled thereon. A device for preventing and purifying liquid leakage to the supporting ground of an industrial facility. A liquid leakage prevention and purification device installed as a countermeasure for liquid leakage prior to the construction process of foundation crushed stone and discarded concrete, which is the foundation groundwork of pile foundation for industrial facilities, and the floor excavated surface with the foundation pile installed Deep digging, forming a poorly permeable soil base in this deep digging part, providing a liquid collecting groove in this poorly permeable soil base, laying a liquid leakage prevention sheet on the entire excavation bottom including the liquid collecting groove, A device for preventing and purifying liquid to a supporting ground of an industrial facility, wherein a liquid collecting pipe is laid in the liquid collecting groove and crushed stone is filled thereon. The liquid collecting pipe is provided on an outer peripheral portion of the foundation and communicates with a liquid collecting pit connected to a facility such as a purification device or a processing tank. Purification device. 3. The apparatus for preventing and purifying liquid leakage to a supporting ground of an industrial facility according to claim 1, wherein the liquid leakage prevention sheet has a nonwoven fabric lined on top and bottom of a synthetic rubber. 4. The device for preventing and purifying liquid from flowing into a support ground of an industrial facility according to claim 1, wherein the liquid collecting pit is a vertical type and is formed in a human hole into which a person enters. 5. 3. The device for preventing and purifying liquid on a support ground of an industrial facility according to claim 1 or 2, wherein a stabilized soil layer is provided between the liquid leakage preventing sheet and the crushed stone. 3. The device for preventing and purifying liquid from leaking into a supporting ground of an industrial facility according to claim 2, wherein a waterproofing operation is performed on a peripheral surface of the foundation pile in the poorly permeable soil base. 3. The device for preventing and purifying liquid from leaking into a supporting ground of an industrial facility according to claim 2, wherein the poorly permeable soil base is formed by adding a solidifying material such as cement to locally generated soil.

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