JP3605673B2 - Soil pollution detector - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a soil pollution detector, and more particularly to a soil pollution detector used for soil survey at a gas station or the like.
[0002]
[Prior art]
In a gas station or the like, it is necessary to periodically check whether contaminants such as oil components are leaking into the ground from an oil storage tank or a pipe buried in the ground.
[0003]
As shown in FIG. 7, the leakage of the contaminants such as oil is confirmed by using a simple excavator (not shown) at a plurality of locations near the oil storage tank and the pipe 1 buried in the ground. After excavation, the collected soil is analyzed to check for the presence or absence and concentration of contaminants. After confirming that there is no contamination, conventionally, as shown in FIG. It was backfilled with earth and sand 3 and the like, and the ground surface was finished with mortar 4 and the like.
[0004]
After a certain period of time, in order to confirm the leakage of the contaminants again, a plurality of locations near the oil storage tank and the pipe 1 were excavated to a certain depth by a simple excavator in the same manner as described above. After confirming the presence or absence and concentration of pollutants, and confirming that there is no contamination, the excavated hole 2 is backfilled with earth and sand 3 and the ground surface is finished with mortar 4 and the like. Drilling and backfilling were repeated every time oil leakage was confirmed.
[0005]
However, since the excavation and backfilling work takes time and costs, the hole 2 having the plurality of holes 5 formed in the hole 2 as shown in FIG. There is a method of embedding a pipe 6 in a shape, and periodically collecting groundwater or air in the pipe 6 to determine whether or not there is leakage of contaminants such as oil.
[0006]
Reference numeral 7 denotes earth and sand for filling a gap between the outer periphery of the pipe 6 and the hole 2.
[0007]
In this method, when there is leakage of a contaminant such as oil from the pipe 1, the contaminant such as oil enters the pipe 6 through the hole 5 of the pipe 6 and falls along the pipe wall. When there is groundwater 8 in the pipe 6, the groundwater 8 is drawn and the collected groundwater 8 is analyzed to confirm the presence or absence and concentration of pollutants, and as shown in FIG. If there is no underground water 8 inside, if the gas detector 9 is inserted into the pipe 6 and the pollutant such as the volatile oil in the pipe is checked, the leakage of the pollutant such as oil can be confirmed.
[0008]
According to this method, once excavation is performed, it is not necessary to excavate and backfill the soil after each inspection, so that time and cost can be saved.
[0009]
[Problems to be solved by the invention]
However, in the above-mentioned conventional method, it is only possible to know the presence or absence of the contamination of the groundwater, so that it is impossible to know the information in the depth direction of the contamination. In addition, when the gas detector 9 is used, the oil type having a low volatility is detected. There was a drawback that it was difficult to do.
[0010]
An object of the present invention is to solve such a problem.
[0011]
[Means for Solving the Problems]
The soil contamination detection tool of the present invention is a support rod, a contaminant adsorbent provided on the outer periphery of the support rod, which is inserted into a pipe arranged in a hole excavated in soil such as a gas station , and a material surrounding the adsorbent. And a protective cover having a diameter larger than the inner diameter of the tube .
[0012]
In the soil pollution detector of the present invention, the protective cover is an oil-resistant mesh .
[0013]
In the soil pollution detector of the present invention, a plurality of the adsorbents are provided, and the adsorbents are provided on the support bar so as to be separated from each other in a length direction.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0015]
In the present invention, as shown in FIGS. 1 and 2, a support rod 10, a contaminant adsorbent 11 such as an oil such as a nonwoven fabric wound around the upper and lower outer peripheral portions of the support rod 10, A plurality of soil contamination detectors 13 comprising a net-like oil-resistant protective cover 12 covering the material 11 are vertically connected to each other and inserted into a pipe 6 embedded in a hole 2 excavated. Is periodically pulled out to check the leakage of contaminants such as oil from the state of the adsorbent 11.
[0016]
In addition, 14 is a nylon string for fixing the cover 12 to the support rod 10, FIG. 3 shows a state in which the protective cover 12 is removed from the contaminant detector 13, and 15 shows the adsorbent 11 Wires 16 for fixing to the support rod 10 and 16 in FIG. 4 are connecting fittings for connecting the upper and lower ends of the respective soil contamination detecting tools 13 respectively.
[0017]
In FIG. 1, reference numeral 17 denotes a cover for closing the hole 2, and reference numeral 18 denotes a string used to pull up the soil contamination detector 13 to the outside.
[0018]
Further, the diameter of the oil-resistant cover 12 is preferably slightly larger than the inner diameter of the tube 6, and is preferably made of a material that can smoothly move inside the tube 6 and has good slip.
[0019]
In the present invention, when there is a leak of a contaminant such as oil, as shown in FIG. 1, it enters the pipe 6 through the hole 5 of the pipe 6, falls along the pipe wall, and falls, thereby detecting the soil contamination. Is adsorbed by the adsorbent 11 of the tool 13, the soil pollution detector 13 is taken out of the pipe 6, and the substances adhering to the respective adsorbents 11 of the soil pollution detector 13 are analyzed to determine the pollutants. Can be checked for leakage, concentration, and location.
[0020]
Contaminants, such as oil, enter the pipe 6 through the hole 5 of the pipe 6, fall along the pipe wall, and when there is groundwater 8 in the pipe 6, as shown in FIG. When the soil contamination detector 13 is taken out of the pipe 6 and taken out of the pipe 6, as shown in FIG. 6, the contaminants such as oil floating on the water surface are adsorbed by the soil contamination detector 13 as shown in FIG. Since it adheres to the sample 11, the leakage can be confirmed by analyzing the attached substance and confirming the presence / absence and concentration of the contaminant.
[0021]
In the above embodiment, two adsorbents 11 are provided on each of the soil contamination detectors 13 vertically, but only one adsorbent 11 may be provided on the soil contamination detectors, or three or more adsorbents may be provided. Is also good.
[0022]
Alternatively, the plurality of adsorbents 11 may be provided at predetermined intervals using only one elongated soil contamination detector, without using the plurality of soil contamination detectors 13.
[0023]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the soil pollution detection tool of this invention, there exists a big advantage that the presence or absence of leakage of pollutants, such as oil, can be easily investigated regardless of the presence or absence of groundwater and the type of oil leaking (the magnitude of volatility).
[0024]
In addition, by confirming the adsorbent 11 to which the contaminant is attached, it is possible to accurately obtain information in the depth direction of the contamination.
[0025]
In addition, once the soil is excavated, backfilling and excavation are not required thereafter, and since no gas detector is used, the presence or absence of leakage can be checked at low cost.
[0026]
If the adsorbent is not contaminated, it can be reused.
[Brief description of the drawings]
FIG. 1 is a side view for explaining a use state of a soil pollution detector of the present invention.
FIG. 2 is a side view of the soil pollution detector of the present invention.
FIG. 3 is a side view showing a state in which a protective cover of the soil pollution detector of the present invention is removed.
FIG. 4 is a side view of a state in which a plurality of soil pollution detectors of the present invention are connected.
FIG. 5 is a side view for explaining a use state of the soil contamination detector of the present invention.
FIG. 6 is a side view for explaining a use state of the soil pollution detector of the present invention.
FIG. 7 is a side view for explaining a conventional soil contamination detection method.
FIG. 8 is a side view for explaining a conventional soil contamination detection method.
FIG. 9 is a side view for explaining another conventional soil contamination detection method.
FIG. 10 is a side view for explaining another conventional soil contamination detection method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Oil storage tank or pipe 2 Hole 3 Sediment 4 Mortar 5 Hole 6 Pipe 7 Sediment 8 Groundwater 9 Gas detector 10 Support rod 11 Adsorbent 12 Protective cover 13 Soil pollution detector 14 String 15 Wire 16 Bonding fitting 17 Cover 18 String

Claims (4)

A support rod and a contaminant adsorbent provided on the outer periphery of the support rod, which is inserted into a pipe arranged in a hole excavated in the soil of a gas station or the like, and a surrounding diameter of the adsorbent, which is larger than the inner diameter of the pipe A soil pollution detector comprising a protective cover . 2. The soil pollution detector according to claim 1 , wherein the protective cover is an oil-resistant mesh . 3. The soil pollution detecting device according to claim 1, wherein a plurality of the adsorbents are provided on the support bar so as to be separated from each other in a longitudinal direction. 4. The soil pollution detector according to claim 1, wherein the pipe has a hole in the pipe wall.

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