KR102294706B1 - Soil sampling device for measurement of resistivity and induced polaization of soil - Google Patents

Abstract

The present invention provides a soil sampling device for collecting a soil sample by penetrating into a stratum, comprising: a body in the form of a hollow tubular body that is opened on both sides in the longitudinal direction and extends in the longitudinal direction; a plurality of cylindrical samplers that are coupled to each other so as to be inserted into the body in the longitudinal direction and are connected to each other, and from which soil samples are collected; a cap coupled to the upper end of the main body to prevent the uppermost sampler among the plurality of samplers from rising to the outside of the upper end of the main body; And it relates to a soil sampling apparatus which is opened to both sides in the longitudinal direction, one end is coupled to the lower end of the main body, and the other end is a soil sample collection device comprising a cannulated body press-fitted into the soil.

Description

SOIL SAMPLING DEVICE FOR MEASUREMENT OF RESISTIVITY AND INDUCED POLAIZATION OF SOIL

The present invention relates to a soil sampling apparatus for measuring electrical properties of a soil sample for investigation of a contamination zone in the underground environment. It relates to a soil sampling apparatus using a sampler.

Among the physical exploration methods used for ground investigation, electrical surveying is a method of measuring the ground using artificial signals in the ground, and it is a method used for underground geological structures, ground pollution zones, mineral resources, and groundwater by analyzing the measurement results.

Electrical resistivity exploration is an exploration method that analyzes the underground geological structure by measuring the potential difference at certain points after flowing an electric current underground and analyzing it.

The induced polarization probe is similar to the electrical resistivity and the measurement method is a method of inducing a polarization shape by flowing an electric current underground and examining the underground medium from the difference in the degree of polarization for each material.

The electrical resistivity and induced polarization probes can evaluate the condition of the ground composed of various media such as rocks, sand, and clay, and are being used in the field of ground investigation, civil engineering, geology, and environmental pollution.

The collection of general on-site soil samples is regarded as an essential element in analyzing and evaluating the physicochemical properties and structure of the ground. In such a sample collection, the inside of the collector is filled with soil by penetrating the ground, and it is common to transport the soil inside the collector into a sample storage pack or sample container.

After the soil sample is collected in the investigation of the underground environment pollution zone, the physical properties of the sample are measured and analyzed by transporting it to the laboratory.

For example, as shown in FIG. 7 , the soil sampler 1000 of Patent Document 1 includes a sample tube in which the soil sampler 1000 is divided in order to examine the cross-section of sediments such as sand, clay, and gravel. A device for observing the cut surface of the sample using the

In addition, as shown in FIG. 8 , the soil sampler 2000 of Patent Document 2 is a device capable of storing a soil sample in a form capable of separating an insertion part of a soil sample and a sampler parent body for soil age measurement. is devised

However, there are several difficulties in measuring electrical properties of soil samples collected from Patent Documents 1 and 2.

First, when the amount of sample collected is small, very different results can be obtained even with a small amount of contaminants included in the sample. Since the collected samples have different environments, such as compaction degree and moisture content, from the actual site, there is a problem with the reliability of the measured electrical resistivity and induced polarization results.

Second, there is deformation and damage to the sample that occurs in the process of transporting the soil sample. In particular, in the case of electrical properties, the measured value depends on the porosity, the electrical conductivity of the number of pores, and the degree of saturation of the pores. If a lot of deformation is applied in the state at the time of collection, it will be difficult to cross-interpret the data from the field physical survey.

Therefore, in order to overcome the problems of the conventional soil sampler described above, there is a need for an apparatus for collecting soil samples and measuring their properties immediately on site and safely transporting them.

Korean Patent Registration No. 10-0848876 Korean Patent Registration Publication No. 10-1334041

Accordingly, the present invention is to solve the problems of the prior art described above, and by collecting a sample in a sampler for measuring electrical properties at the same time as collecting a soil sample, the state of the original soil can be maintained, so that it is necessary to transport it to a separate holder for measurement Because it does not do it, the purpose is to make it possible to measure immediately on site or use it for measurement indoors immediately after transport.

In addition, an object of the present invention is to provide a soil sample collection device in which a plurality of samplers are detachably mounted according to length and position, the sampler is separated after the soil sample is collected, and electrical properties can be measured from the collected soil. do it with

In order to achieve the above-described technical problem, the present invention provides a soil sampling device for collecting a soil sample by penetrating into a stratum, comprising: a body in the form of a hollow tube that is opened on both sides in the longitudinal direction and extends in the longitudinal direction; a plurality of cylindrical samplers that are coupled to each other so as to be inserted into the body in the longitudinal direction and are connected to each other, and from which soil samples are collected; a cap coupled to the upper end of the main body to prevent the uppermost sampler among the plurality of samplers from rising to the outside of the upper end of the main body; And it is open to both sides in the longitudinal direction, one end is coupled to the lower end of the body, the other end can be provided a soil sampling device comprising a cannulated body press-fitted into the soil.

In addition, the inner diameter of the main body of the present invention is smaller than the inner diameter of the cap, the upper end of the main body can be accommodated in the cap, the inner diameter of the main body is smaller than the inner diameter of the cannulated body, the lower end of the main body can be accommodated in the cannulated body.

In addition, the main body of the present invention is formed of a plurality of segments divided in the longitudinal direction, and the cannulated body of the present invention may include an inclined portion formed to be inclined from the upper end toward the lower end.

In addition, the cap of the present invention further includes a through hole passing through the side of the cap in a radial direction and a fixing pin coupled to the through hole, and the upper end of the sampler at the top of the plurality of samplers is caught by the fixing pin, can be prevented from moving to

In addition, the volume of each of the plurality of samplers of the present invention may be the same as each other, and may be made of acrylic, polyvinyl chloride (PVC) or polypropylene (PP).

In addition, each of the plurality of samplers of the present invention is smaller than the outer diameter of the sampler and formed on the periphery of one end of the sampler, and the inner diameter of the sampler is larger than the inner diameter of the sampler and adjacent to the other end of the sampler. It includes a female thread coupled to, the plurality of samplers may be connected by screwing the male thread part and the female thread part to each other.

In addition, the sampler of the present invention includes a step portion formed at the lower end of the female screw portion, an electrode ring placed on the step portion and fitted to the inner surface of the sampler, and at a position where the electrode ring is disposed, from the outside to the electrode ring It may further include a terminal hole formed through the sampler to be accessible, such an electrode ring may be made of stainless steel.

The present invention has a very useful effect for immediately measuring electrical properties in the original ground state for a soil sample collected at a soil survey site, and for repeated measurement of electrical properties after transport.

In addition, according to the present invention, a soil sample of a depth adjacent to the ground is stored and transported together with a sample of a sampler to perform an analysis by depth of a collection location through chemical analysis.

In addition, in the present invention, since the chemical analysis, contamination analysis, and electrical property measurement of the soil are measured for the same sample, it is easy to compare and analyze the results, and through this, it can be utilized for investigation and evaluation of soil contamination.

1 is a perspective view schematically illustrating a soil sampling apparatus according to an embodiment of the present invention.
2 is an exploded perspective view schematically illustrating a soil sampling apparatus according to an embodiment of the present invention.
3 is a cross-sectional view of a soil sampling apparatus according to an embodiment of the present invention.
4 is a cross-sectional view of a sampler of a soil sampling apparatus according to an embodiment of the present invention.
5 is a conceptual diagram schematically showing that the soil sampling apparatus according to an embodiment of the present invention is penetrated into the strata.
6 is a conceptual diagram schematically illustrating a method of collecting a soil sample and measuring electrical properties of the collected soil sample by using a soil sampling device according to an embodiment of the present invention.
7 shows an example of a conventional soil sampler.
8 shows an example of another conventional soil sampler.

Hereinafter, a soil sampling apparatus according to an embodiment of the present invention and a method for measuring electrical properties of a soil sample using the same will be described with reference to the accompanying drawings through preferred embodiments of the present invention.

Prior to the description, when a part "includes" a certain component, this does not exclude other components unless otherwise stated, meaning that other components may be further included.

In addition, although embodiments of the present invention have been described with reference to the accompanying drawings, these are described for purposes of illustration, and the technical spirit of the present invention and its configuration and application are not limited thereby.

In addition, in the following description, the vertical direction of FIG. 3 , which is the traveling direction of the soil sampling apparatus 100 of the present invention, is referred to as a “longitudinal direction”, and the horizontal direction is referred to as a “radial direction”.

1 is a perspective view schematically showing a soil sampling device 100 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view schematically showing a soil sampling device 100 according to an embodiment of the present invention. , FIG. 3 is a cross-sectional view of a soil sampling apparatus 100 according to an embodiment of the present invention.

As shown in FIGS. 1 and 2 , the soil sampling device 100 according to an embodiment of the present invention may collect a soil sample by penetrating into the stratum.

Specifically, the main body 10 is opened on both sides in the longitudinal direction and is in the form of a hollow tubular body extending in the longitudinal direction.

In addition, a plurality of cylindrical samplers 20 are disposed inside the body 10 in the longitudinal direction of the body, and each sampler may be coupled to each other. In addition, the soil sample collected in the sampler 20 is stored.

In addition, in order to prevent the uppermost sampler from being moved to the outside of the upper end of the main body 10 by press-fitting the sample while collecting the soil sample, a cap 30 is fixedly mounted to the upper end of the main body 10 .

On the other hand, the cap 30 is formed with a through hole 31 penetrating the side in the radial direction, and the fixing pin 32 passes through the through hole 31 and is coupled to the cap 30 . As shown in FIG. 3 , the upper end of the uppermost sampler 20 is caught by the fixing pins 32 , and it can be prevented from moving to the outside of the upper end of the main body 10 when soil is collected.

In addition, the lower end of the main body 10 is formed with an insert tube body 40 for excavating into the strata, and since the insert tube body 40 is opened in the longitudinal direction, the collecting mechanism 100 penetrates the soil while penetrating into the strata. Soil samples are stored in the sampler 20 sequentially from the sampler 20 at the bottom of the sample.

In addition, as shown in FIG. 3 , the side surface of the cannula body 40 is formed with an inclined portion 41 that is inclined toward the lower end from the upper end, which is advantageous for penetrating into the strata.

On the other hand, the coupling method of the main body 10 and the cap 30, and the main body 10 and the cannulated body 40 is not particularly limited, but, for example, both ends of the main body 10 are connected to the cap 30 and the cannulated body. (40) can be accommodated in a method of fitting.

As shown in FIG. 3 , since the inner diameter d1 of the main body 10 is smaller than the inner diameter d2 of the cap 30 , the upper end of the main body 10 may be accommodated in the cap 30 when combined. In addition, since the inner diameter d1 of the main body 10 is smaller than the inner diameter of the cannula body d3, the lower end of the main body 10 can be accommodated in the cannula body 40 when coupled.

Therefore, even if the combined soil sampling device 100 is penetrated into the stratum, the main body 10, the cap 30, and the cannulated body 40 are not separated from each other, and without using additional welding or coupling means The components can be combined in this way, and it is easy to separate the components even after the soil sample is complete.

Meanwhile, as shown in FIG. 2 , the body 10 may be formed of a plurality of segments 11 divided in the longitudinal direction. In FIG. 2 , the division into two segments 11 is illustrated, but it is also possible to divide into two or more segments 11 if necessary.

Since the main body 10 is formed of the plurality of segments 11 , the sampler 20 can be easily separated from the soil sampling device 100 after the collection of the soil sample is completed. That is, after the collection of the soil sample is completed, the plurality of segments 11 are automatically divided when the cap 30 and the cannula body 40 that are respectively fitted and coupled to the upper and lower ends of the body 10 are separated. The sampler 20 in which the soil sample is stored can be easily separated from the body 10 .

4 is a cross-sectional view of a sampler 20 of a soil sampling apparatus 100 according to an embodiment of the present invention.

As shown in FIG. 4 , the sampler 20 is formed as a cylindrical shell having a vertical length, and connection and separation between the samplers 20 are possible through screw coupling at the upper and lower ends.

Specifically, as shown in FIG. 4 , a male screw portion 21 smaller than the outer diameter of the sampler 20a cell is formed around one end of the sampler 20a , which is any one of the plurality of samplers 20 . In addition, the other sampler 20b among the plurality of samplers 20 adjacent to the sampler 20a has a female screw formed on the inner surface of the sampler 20b shell at the other end opposite to the aforementioned male screw part 21 . It may include a portion 22 .

Since the female threaded part 22 of the other one of the plurality of samplers 20 is formed on a circumference larger than the inner diameter of the sampler, the male threaded part 21 of the above-described one sampler 20a is inserted into and screwed together. can be

Accordingly, the plurality of samplers 20 can be easily coupled or separated by being connected to each other through the above-described screw coupling of the male screw part 21 and the female screw part 22 .

In the embodiment of FIG. 4 , the female screw part 22 is formed at the upper end of each sampler 20 and the male screw part 21 is formed at the lower end, but the male and female screw positions may be changed in various embodiments. For example, it is also possible to form a male thread part at the upper end, and to form a female thread part at the lower end as opposed to the embodiment shown in FIG. 4 . Alternatively, both ends of one sampler are alternately formed with male threaded parts, then both ends of the neighboring sampler are formed with female threaded parts, and then both ends of the neighboring sampler are connected with male threaded parts again. It is also possible

The volume of each of the samplers 20 may be equal to each other, and the material may be made of transparent or translucent acrylic, polyvinyl chloride (PVC) or polypropylene (PP). Therefore, it is easy to observe the sample inside the sampler 20 , and it is possible to store the same amount of soil sample for each sampler 20 .

As shown in FIG. 4 , a step portion 22a is formed at the lower end of the sampler 20 in which the female screw portion 22 is formed, and the electrode ring 25 is placed on the step portion 22a. Specifically, since the inner diameter df of the female screw portion 22 and the outer diameter dr of the electrode ring 25 are substantially the same, the outer surface of the electrode ring 25 is fitted and coupled to the inner surface of the female screw portion 22 . .

In addition, in a position around the step portion 22a where the electrode ring 25 is disposed, a terminal hole ( 23) is formed.

Accordingly, the electrode ring 25 and the terminal hole 23 are respectively formed for each sampler 20,

Since the measuring device 50 can be connected to each of these electrode rings 25 through the terminal hole 23 , it is easy to measure electrical properties for each soil sample inside the desired sampler 20 .

The electrode ring 25 may be manufactured using a stainless steel material, and may be manufactured by changing the material according to ease.

5 is a conceptual diagram schematically showing that the soil sampling apparatus 100 according to an embodiment of the present invention is penetrated into the strata, and FIG. 6 is a soil sampling apparatus 100 according to an embodiment of the present invention. It is a conceptual diagram schematically illustrating a method of collecting a soil sample using

As shown in FIGS. 5 and 6 ( a ), the soil sampling device 100 according to an embodiment of the present invention penetrated into the stratum, and among a plurality of samplers 20 according to the stratum depth desired by the measurer A predetermined target sampler 20 may be selected. 5 and 6 (a), the target sampler 20 to be measured is indicated by an oblique line.

Next, as shown in FIG. 6B , a predetermined target sampler 20 may be separated from the main body 10 . Since the specific method of separation has been described above, it will be omitted here.

Next, as shown in FIG. 6( c ), the current electrodes 51 are positioned at both ends of the separated target sampler 20 , and the potential electrodes are connected to the electrode ring 25 through the terminal hole 23 . Thus, the electrical properties of the soil sample may be measured in the field through the measuring device 50 .

Measurable electrical properties can be electrical resistivity or induced polarization of soil. For example, the electrical resistivity of the soil may be calculated through [Equation 1] below, which is proportional to the cross-sectional area of the soil sample and inversely proportional to the length.

[Equation 1]

은 전위전극에서 측정된 전위차(V)이다.Here, A is the cross-sectional area of the cylindrical sample (m2), L is the length of the cylindrical sample (m), I is the current injected from the current electrode,

is the potential difference (V) measured at the potential electrode.

On the other hand, it is also possible to measure other electrical properties of the soil in the field by changing the type of the measuring device (50).

In conclusion, the soil sampling mechanism 100 according to an embodiment of the present invention prevents disturbance or contamination of the sample according to the movement of the sampler 20, and immediately collects the soil sample in the field state, and the electrode ring ( 25) can be used to measure electrical properties immediately at the site after sample collection by using the sampler 20 each included.

With reference to the above description, those skilled in the art to which the present invention pertains will be able to understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential characteristics thereof.

Therefore, it should be understood that the above-described embodiments are illustrative in all respects and are not intended to limit the present invention to the above-described embodiments, and the scope of the present invention lies in the claims described later rather than the detailed description described above. All changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention.

100 Soil Sampling Apparatus 10 Body
11 segment 20 sampler
21 Male thread 22 Female thread part
22a step 23 terminal hole
25 electrode ring 30 cap
31 Through hole 32 Fixing pin
40 Insertion tube body 41 Inclined part
50 Measuring device 51 Current electrode
d1 body inner diameter d2 cap inner diameter
d3 Inner diameter of insertion tube df Inner diameter of female thread
dr electrode ring outer diameter

Claims (11)

A soil sampling device for collecting a soil sample by penetrating into the strata,
a body in the form of a hollow tube that is opened on both sides in the longitudinal direction and extends in the longitudinal direction;
a plurality of cylindrical samplers mounted in connection with each other so as to be inserted into the body in the longitudinal direction, and from which the soil sample is collected;
a cap coupled to the upper end of the main body to prevent the uppermost sampler among the plurality of samplers from rising to the outside of the upper end of the main body; and
It is opened on both sides in the longitudinal direction, and one end is coupled to the lower end of the main body, and the other end includes an inserted tube body that is press-fitted into the soil,
Each of the plurality of samplers is smaller than the outer diameter of the sampler, a male screw portion formed on the circumference of one end of the sampler, and a male screw portion of the sampler larger than the inner diameter of the sampler and adjacent to each other at the other end of the sampler is inserted and coupled and a female screw part, wherein the plurality of samplers are connected by screwing the male screw part and the female screw part to each other,
The sampler includes a step portion formed at the lower end of the female screw portion, an electrode ring placed on the step portion and fitted to the inner surface of the sampler, and the sampler so that the electrode ring can be accessed from the outside at a position where the electrode ring is disposed Soil sampling apparatus, characterized in that it further comprises a terminal hole formed through the.
The method of claim 1,
The inner diameter of the main body is smaller than the inner diameter of the cap, the soil sampling apparatus, characterized in that the upper end of the main body is accommodated in the cap.
3. The method of claim 2,
The inner diameter of the main body is smaller than the inner diameter of the cannulated body, and the lower end of the main body is a soil sampling apparatus, characterized in that accommodated in the cannulated body.
4. The method of claim 3,
The body is a soil sampling apparatus, characterized in that formed of a plurality of segments divided in the longitudinal direction.
5. The method of claim 4,
The insertion tube body is a soil sampling device, characterized in that it comprises an inclined portion formed to be inclined toward the lower end from the upper end.
The method of claim 1,
The cap further includes a through hole passing through the side surface of the cap in a radial direction and a fixing pin coupled to the through hole,
Soil sampling mechanism, characterized in that the upper end of the sampler at the top of the plurality of samplers is caught by the fixing pin to prevent movement to the upper end when the soil sample is collected.
The method of claim 1,
A soil sampling apparatus, characterized in that the volume of each of the plurality of samplers is the same as each other.
The method of claim 1,
The plurality of samplers are soil sampling apparatus, characterized in that made of acrylic, polyvinyl chloride (PVC) or polypropylene (PP)
delete delete The method of claim 1,
The electrode ring is a soil sampling device, characterized in that made of stainless steel.

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