JP2001058169A - Liquid leakage prevention and cleaning apparatus to bearing ground of industrial facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid leakage prevention means capable of certainly preventing a harmful substance contained in a solvent or the like used in industrial facilities from penetrating in the ground and to economically execute the liquid leakage prevention means in an execution stage for constructing the foundation of industrial facilities as a labor-saving construction method because the liquid leakage prevention means is easy to incorporate as a leaked liquid measure. SOLUTION: A liquid leakage prevention and cleaning apparatus is provided in a foundation ground of the spread foundation of industrial facilities. In this case, a liquid gathering trough is provided to an excavated flooring surface 3 and a leaked liquid preventing sheet 5 is laid on the excavated entire bottom surface including the liquid gathering trough and a liquid gathering pipe 6 is provided to the liquid gathering trough to be covered with broken stones.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing and purifying liquid from leaking into a supporting ground of a foundation of an industrial facility.

[0002]

2. Description of the Related Art In a facility such as a final waste disposal site, for example, harmful substances emitted from waste may diffuse into the ground over a long period of time and contaminate soil. Conventionally, for example, a waterproof sheet is laid on the foundation ground of a facility to prevent harmful substances emitted from waste from penetrating into the ground.

[0003] On the other hand, when soil is contaminated, it is conceivable to trace and grasp underground harmful substances and completely remove them, but such a method is not easy to completely remove. There are also high risks, such as losses due to a decline in land reputation, rising costs for remediation measures for contaminated soil, prolonged construction periods, and a loss of public trust.

[0004]

In a method in which a water-impervious sheet is merely laid on the foundation ground, if the sheet is damaged, harmful substances penetrate into the soil, and soil contamination by harmful substances is reliably prevented. Was difficult.

[0005] An object of the present invention is to solve the above-mentioned disadvantages of the prior art, and to reliably prevent harmful substances contained in solvents and the like used in facilities from penetrating into the ground, and to prevent this leakage. In the construction stage of building the foundation of the facility,
An object of the present invention is 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 and can be economically constructed by a labor-saving method.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly provides a liquid leakage preventing and purifying apparatus provided on a foundation foundation of a direct foundation of an industrial facility. The gist of the invention is that a liquid collecting groove is provided, a liquid leakage prevention sheet is laid on the entire surface of the excavation bottom including the liquid collecting groove, a liquid collecting pipe is laid in the liquid collecting groove, and crushed stone is filled thereon. It is.

Secondly, the present invention relates to a device for preventing and purifying liquid which is provided on a foundation foundation of a pile foundation of an industrial facility. Forming a porous soil base, providing a liquid collecting groove in the poorly permeable soil base, laying a liquid leakage prevention sheet on the entire surface of the excavation bottom including the liquid collecting groove, and laying a liquid collecting pipe in the liquid collecting groove. And the fact that crushed stone is filled thereon.

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.

Fourth, the liquid leakage prevention sheet has a feature that a nonwoven fabric is lined up and down with synthetic rubber.

Fifth, the liquid collecting pit has a vertical shape and is formed in a human hole into which a person can enter.

Sixth, the gist of the present invention is to provide a stabilized soil layer between the liquid leakage prevention sheet and the crushed stone.

Seventh, waterproofing is performed on the peripheral surface of the foundation pile in the impervious soil base. Eighth, the impervious soil base is formed by adding a solidifying material such as cement to locally generated soil. The gist is to do.

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 in the foundation ground, and the leaked water in the collecting trench. It flows into the collection pipe and is collected. In this case, since a liquid leakage prevention sheet is laid on the entire bottom surface of the excavation including the liquid collecting groove, it is possible to prevent liquid leakage containing harmful substances from penetrating into the foundation ground, and 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 functions as a shear 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.

According to the second aspect of the present invention, when a harmful substance leaks from a facility, the leaked water flows through a crushed stone layer having a high hydraulic conductivity in the foundation groundwork, and the leaked water in the collecting trench. It flows into the collection pipe and is 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 to form a poorly permeable soil base in this deeply digged part. It is possible to prevent the leaked liquid from penetrating the periphery of the driven pile.

Further, since the liquid leakage prevention sheet is laid on the entire bottom surface of the excavation including the liquid collecting groove, it is possible to prevent the liquid containing harmful substances from penetrating into the foundation ground, and furthermore, to prevent the liquid from leaking into the ground. It can be recovered at the initial stage just before spreading. Also,
Although the liquid leakage prevention sheet has a low coefficient of friction, by laying it on the entire surface of the excavated 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.

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 facilities such as a purification device and a processing tank. By further collecting in the liquid collection pit, processing can be surely performed.

According to the fourth aspect of the present invention, in addition to the above function, 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. .

According to the present invention described in claim 5, according to claim 3,
In addition to the operation of the present invention described, the liquid collection pit is formed in a vertical shape and formed in a human hole into which a person enters, so that the leachate accumulated in the human hole is regularly observed and chemically analyzed. In addition, it is possible to detect a liquid leak at an early stage, and it is possible to quickly cope with this, such as repairing a leaked portion. In addition, visual inspection such as a clogged state of the liquid collection tube can be easily performed.

According to the sixth aspect of the present invention, in addition to the above-described functions, a stabilizing soil layer is provided between the liquid leakage prevention sheet and the crushed stone, so that the liquid leakage prevention sheet due to heat, ultraviolet rays, ozone, etc. Of the liquid leakage prevention sheet due to changes in air temperature.

According to the seventh aspect of the present invention, in addition to the above-described operation, in the case of a pile foundation, when the pile penetrates the liquid leakage prevention sheet, the liquid leakage prevention sheet is cut at this point.
The swelling water-stopping material such as bentonite is placed on the peripheral surface of the foundation pile within the poorly permeable soil base, or a water-stopper such as a rubber-made water-blocking ring is placed, so that the pile can travel along the pile surface. To prevent liquid leakage from penetrating into the ground.

According to the eighth aspect of the present invention, in addition to the above-described 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. Not only can it form a high-quality water-impervious ground with excellent resistance and impact resistance, it also serves as a base to protect the liquid leakage prevention sheet with sufficient supporting force and a smooth surface, Back pressure is also prevented.

[0022]

Embodiments of the present invention will be described below in detail with reference to 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 supporting ground of an industrial facility of the present invention, FIG. 2 is a plan view of the same, FIG. One embodiment is a device for preventing and purifying liquid provided in 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
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.

This liquid leakage prevention sheet 5 is made of a rubber sheet 5a.
As shown in FIG. 4 (a), a single non-woven fabric 8 is laid on the upper and lower sides as a set, or two non-woven fabrics are sandwiched between the non-woven fabrics as shown in FIG. 4 (b).

Then, a liquid collecting pipe 6 is laid at the bottom of 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.

In this case, the liquid collecting pipe 6 and the crushed stone 7 may be directly arranged on the liquid leakage prevention sheet 5 on which the nonwoven fabric 8 is lined up as described above, but as shown in FIG. In addition, stabilized soil layer 9 having appropriate strength by cement improvement
May be provided. This stabilized soil layer 9
It prevents deterioration of the liquid leakage prevention sheet due to heat, ultraviolet rays, ozone, etc., and alleviates expansion and contraction of the liquid leakage prevention sheet due to changes in temperature.

A plurality of liquid collecting pits 12 are formed on the outer periphery of the foundation in a vertical type in a human hole into which a person enters, and in the example shown in the drawing, two opposite liquid collecting pits 12 are provided at the bottom of the liquid collecting pit 12. The collection pit 12 is connected to a purification device 13 such as a purification device or a treatment tank different from the facility 1 through the collection pipe 6.

The liquid collecting tube 6 is provided with 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.
A hydrodynamic gradient that is inclined downward in the direction of is provided.

Next, a method of constructing such a liquid leakage prevention and purification device will be described. When constructing the facility 1, the liquid leakage prevention and purification device of the present invention is incorporated into the construction process of the basic crushed stone 10 and the discarded concrete 11, which is the foundation foundation of the direct foundation, as a liquid leakage countermeasure, and is constructed. 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.

A non-woven fabric 8 is formed on the entire excavated bottom surface including the liquid collecting groove 4.
Is laid. in this case,
The leakage prevention sheet 5 is adhered 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.

After a stabilizing soil layer 9 is provided in the collecting groove 4 if necessary, a collecting pipe 6 is laid, crushed stone 7 is filled thereon, and the collecting pipe 6 is connected to a collecting pit 12. Connecting.

After taking measures to prevent liquid leakage in the foundation work in this way, crushed foundation stone 10 and discarded concrete 11 are constructed,
The base plate 2 is constructed, and the facility 1 is constructed thereon.

In a facility in which such a liquid leakage prevention / purification device is directly provided on the foundation, when an organic or heavy oil-based harmful substance leaks, it penetrates through the layers of the basic crushed stone 10 and the crushed stone 7 to collect the liquid in the collecting groove 4. Flows into. In this case, a large amount of rainwater and groundwater during a typhoon can flow intensively through the layer of 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, harmful substances spilled from Facility 1 are also crushed stone 10 and crushed stone 7
Layer is flowing horizontally before trying to impregnate it into the ground,
In the present invention, since the liquid leakage prevention sheet 5 is laid on the lower surface of the layer of the crushed stone 7 having the highest mobility, a perforated liquid collecting pipe 6 laid in the liquid collecting groove 4 immediately before the liquid is diffused into the ground. To be collected. In case of a large amount of liquid leakage, the material for backfilling shall be crushed stone, and the space shall be designed to have a function of temporary storage.

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 in the liquid collection pit 12 is periodically observed and chemically analyzed, the leakage of the harmful substance is detected early. If a periodic investigation shows that harmful substances are leaking, by performing inspections and inspections inside the facility, it is possible to quickly repair the leaked location inside the facility at the initial stage of the leak. 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.

The harmful substances in the liquid collecting pit 12 are collected by a purifying apparatus 13 such as a purifying apparatus or a processing tank, and are processed there.

The liquid leakage prevention sheet 5 is formed by digging the floor-attached surface 3 and laying it on the entire excavation bottom surface including the liquid collecting groove 4, so that even if the liquid leakage prevention sheet 5 itself has a low coefficient of friction, it is horizontal. Since the sliding resistance in the direction can be increased, the stability of the facility 1 and the entire substructure can be secured.

FIGS. 6 to 11 show a second embodiment, in which a facility 1 is shown.
In the figure, reference numeral 15 denotes a foundation pile, in which a foundation pile 15 is cast and deep-drilled on a floor-excavated surface 3 where the foundation pile 15 is installed. A poorly permeable soil base 16 is formed in the thick part of the deep excavation.

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 is set to 10 ^-6 cm / s or less by mixing the solidifying material. it can.

The liquid-collecting grooves 4 are provided in a grid pattern on the poorly permeable soil base 16, and the liquid-leak 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 periphery of the foundation pile 15, and the liquid leakage prevention sheet 5 is adhered to the foundation pile 15 to secure water tightness.

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, a swellable waterproofing material 17 such as bentonite is arranged around a foundation pile 15 as shown in FIG. 9, or a rubber waterproofing ring 18 is provided as shown in FIG. .

A stable treatment soil layer 9 is provided on the liquid leakage prevention sheet 5, a liquid collecting pipe 5 is provided in the liquid collecting groove 4, and the crushed stone 7 is filled in the liquid collecting groove 4. Is connected to a collection pit 12 and the collection pit 12 is connected to a purification facility 13 for processing.
This is the same as the embodiment.

Next, a method of installing 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 liquid leakage countermeasure when constructing the facility 1. 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 of the depth. At this time, a waterproofing work is constructed around the foundation pile 15.

Before the hardly permeable soil base 16 hardens and develops its initial strength, the cloth is dug here to provide the liquid collecting groove 4. Thereafter, the steps of installing the liquid collection pipe 5, the liquid collection 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]

As described above, the apparatus for preventing and purifying liquids leaking to the supporting ground of an industrial facility according to the present invention can be used when a harmful substance contained in a solvent or the like used in the facility tries to penetrate into the ground. In the early stages of the process, this can be treated early, and measures such as facility repairs can be taken early so that soil contamination can be reliably prevented and the natural environment and living environment can be prevented from being destroyed. In addition, this means for preventing liquid leakage can be labor-saving and economically implemented by incorporating it as a liquid leakage countermeasure in the construction stage of constructing the foundation of the facility.

[Brief description of 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 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 longitudinal 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 of the present invention.

FIG. 5 is a vertical sectional front view showing another example of a liquid collecting groove 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 vertical sectional front 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.

FIG. 7 is a plan view showing a second embodiment of a device for preventing and purifying liquid from leaking into 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 leakage to a support ground of an industrial facility of the present invention.

FIG. 10 is a vertical 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 supporting ground of an industrial facility of the present invention.

FIG. 11 is a partial perspective view showing a second embodiment of the device for preventing and purifying liquid leakage to a support 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 ... Basic crushed stone 11 ... Discarded concrete 12 ... Collecting pit 13 ... Purification facility 14 ... Backfilled crushed stone 15 ... Foundation pile 16 ... Poorly permeable soil base 17 ... Swellable waterproofing material 18 ... Waterproof ring

Claims (8)

[Claims] An apparatus for preventing and purifying liquid leakage provided on a foundation ground of a direct foundation of an industrial facility, wherein a liquid collecting groove is provided on an excavated surface with a floor, and liquid is leaked over the entire excavated bottom including the liquid collecting groove. An apparatus for preventing and purifying liquid from leaking into a supporting ground of an industrial facility, wherein a prevention sheet is laid, a liquid collecting pipe is laid in the liquid collecting groove, and crushed stone is filled thereon. 2. A device for preventing and purifying liquid which is provided in a foundation ground of a pile foundation of an industrial facility, wherein the floor is excavated with a floor after the foundation pile is driven, and a poorly permeable soil is formed in the deeply dug portion. Forming a base, providing a collection channel in this poorly permeable soil base,
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. Liquid leakage prevention and purification device. 3. The supporting ground of an industrial facility according to claim 1, wherein the liquid collecting pipe is provided on an outer peripheral portion of the foundation and communicates with a liquid collecting pit connected to equipment such as a purification device or a processing tank. Liquid leakage prevention and purification device. 4. The liquid leakage prevention sheet is provided above and below the synthetic rubber.
3. The device for preventing and purifying liquid from leaking into a supporting ground of an industrial facility according to claim 1 or 2, wherein the nonwoven fabric is lined. 5. The device for preventing and purifying liquid to a supporting ground of an industrial facility according to any one of claims 1 to 3, wherein the liquid collecting pit is of a vertical type and is formed in a human hole into which a person enters. . 6. The device for preventing and purifying liquid on a supporting ground of an industrial facility according to claim 1, wherein a stabilization treatment soil layer is provided between the liquid leakage preventing sheet and the crushed stone. 7. The apparatus 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 impervious soil base. 8. The apparatus for preventing and purifying liquid from leaking into a support 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.