KR101743580B1 - Dynamic cone penetrometer for detecting intensity and resistivity of ground, and ground penetrating radar (gpr) prove system and method for correcting permittivity of ground using the same - Google Patents

Abstract

The dynamic characteristics according to the depth were obtained by using the dynamic penetration measured by the dynamic cone penetrator and the strength and electrical resistivity characteristics measured by the electrode and temperature sensor were inversely analyzed to determine the degree of relaxation and wetness In addition, by applying a dynamic cone penetrator capable of obtaining electrical resistivity, it is possible to estimate the permittivity using the actual strength and electrical characteristics of the target soil, and by taking the value, There is provided a system and method for surface penetrating radar that corrects the dielectric constant characteristics of the ground using dynamic cone piping for measuring the strength and electrical resistivity of the ground,

Description

TECHNICAL FIELD [0001] The present invention relates to a ground penetrating radar surveying system and a ground penetrating radar surveying system that corrects a dielectric constant characteristic of a ground using the dynamic cone piping for measuring the strength and electrical resistivity of the ground, SYSTEM AND METHOD FOR CORRECTING PERMITTIVITY OF GROUND USING THE SAME < RTI ID = 0.0 >

The present invention relates to a dynamic cone penetrator, and more particularly, to a dynamic cone penetrator, which utilizes strength and electric resistance characteristics obtained through a ground penetrating radar (GPR) and a dynamic cone penetrometer (DCP) A dynamic cone piping for measuring the strength and electrical resistivity of the ground, which can correct the permittivity data of distorted surface transmission radar through the correction of the permittivity of the radar, and the surface transmission radar exploration system And methods.

Recently, application and study of non - destructive exploration method which is able to exploit a large area in a short time and with low cost have been actively carried out.

Ground Penetrating Radar (GPR) survey method is mainly used as a representative non-destructive survey method, and the ground is being explored by radiating electromagnetic waves to the target ground and analyzing the reflected electromagnetic waves. However, In order to improve the accuracy of the ground condition, it is necessary to correct the characteristics of the electromagnetic waves which may be influenced by various factors such as the wet state of the ground, the degree of burial, and the degree of relaxation.

The in situ test is a direct penetration test for the target ground, which is characterized by its objective and high accuracy. However, because of the long test time, many tests can not be conducted. As a result, There is a problem in that it is not appropriate when a survey is required.

Specifically, a survey method using an indicator transmission radar (GPR) is used as a non-destructive survey method for evaluating the soundness of a target ground according to the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a general surface transmission radar (GPR) surveying method.

1, a general GPR probe system is a system in which an electromagnetic wave is propagated from a transmitting antenna of a transmitter to a ground in a short pulse shape and then reflected by a boundary of a medium having a different physical property in a propagation path, It is a physical exploration device that can receive and analyze underground information by receiving antenna.

The GPR probe according to the prior art is disadvantageous in that not only the antenna used for the probe is so expensive but also the frequency of the antenna is different according to the depth of the probe so that the antenna must be purchased separately according to the application range, Because of the difference in speed, there is a disadvantage that the accuracy of data analysis is low.

In addition, GPR probes according to the prior art can cause uncertainties in the results of the survey depending on the electrical characteristics of the target ground. In particular, since the electrical resistivity decreases after rainfall, the reflected wave signal is very weak It is difficult to acquire data at a certain level.

In addition, these GPR probing methods classify the strata using the permittivity characteristics of the respective grounds. However, there is a limitation in the evaluation of the direct strength characteristics. If there is no prior investigation of the permittivity characteristics of the target ground, So that a large error can be caused in the calculation of the depth of the boundary of the ground layer. In addition, there are devices that simultaneously operate the antennas of various frequency bands and effect the exploration of the target ground several times. However, since these equipments are expensive and require specialized analysis program, There are limitations.

On the other hand, the dynamic cone penetration test is a miniaturized in-situ penetration test method that performs direct intrusion into the target ground.

2 is a view showing a dynamic cone penetrator according to the prior art.

As shown in FIG. 2, the dynamic cone pipe 10 according to the prior art has a handle 11. A hammer 12, an anvil 13, a steel pipe rod 14, and a cone 15.

The dynamic cone penetration test using the dynamic cone pipe 10 is easy to maintain and store the equipment, and the test procedure is simple and widely used for obtaining the strength of the target ground in, for example, the United States roadway. However, such a dynamic cone penetration test is only capable of acquiring the strength characteristics of the target ground, and it is difficult to acquire other characteristics of the target ground such as electrical characteristics.

Accordingly, it is necessary to provide a method of verifying various characteristics of the target ground by connecting the results of the above-mentioned surface transmission radar (GPR) with the dynamic cone penetration test results and verifying the reliability of the surface transmission radar (GPR) to be.

Korean Patent No. 10-1094369 filed on Sep. 15, 2009, entitled "Cone Penetration Tester for Ground Impedance Measurement" U.S. Patent No. 5,313,825, issued May 8, 1992, entitled "Dual mass dynamic cone penetrometer" Korean Patent No. 10-1551824 filed on Mar. 18, 2014, entitled "Submerged Detection Radar and Detection Method" US Patent Publication No. 2012-4848 (published on Jan. 5, 2012), entitled " Device And Methods Of Use Of A Dynamic Cone Penetrometer For Evaluating Soil Compaction " Korean Patent Publication No. 2014-128720 (Publication date: November 6, 2014), entitled " Measurement system using dynamic cone penetrator " Korean Patent Laid-Open No. 2011-54573 (Publication date: May 25, 2011), title of invention: "Ground test device for both cone penetration test and vane shear test" U.S. Patent No. 4,691,204 (filed December 31, 1984), entitled "Radar Apparatus" Korean Patent Laid-Open No. 2011-0114882 (published on October 20, 2011), entitled "

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to acquire strength characteristics according to depth by using measured dynamic intrusions, to measure strength and electrical resistivity characteristics measured using an electrode sensor and a temperature sensor The present invention relates to a method and system for surveying and measuring radar data of a ground using a dynamic cone excavator for measuring the strength and electrical resistivity of a ground, will be.

Another object of the present invention is to apply a dynamic cone penetrator capable of obtaining electrical resistivity to calculate the permittivity to which the actual strength and electrical characteristics of the target ground are applied, The present invention is to provide a dynamic cone excavator for measuring the strength and electrical resistivity of the ground, which can acquire an accurate ground surface image, and a system and method for the surface transparency radar which corrects the permittivity characteristics of the ground using the excavator.

As a means for achieving the above technical object, according to the present invention, a dynamic cone penetrator for measuring the strength and electrical resistivity of a ground according to the result of exploration of a ground penetrating radar (GPR) surveying apparatus, A dynamic cone penetrator installed at a predetermined interval or at an abnormal signal acquisition position on a target ground to correct distortion, comprising: a drop hammer for dropping at a predetermined height to load impact energy; A hammer guide for guiding the movement of the drop hammer; An anvil for transmitting the impact energy transmitted from the drop hammer; A penetration rod extending longitudinally from the anvil and receiving a connecting cable; And a front end cone connected to an end of the penetration rod and provided with an electrode sensor and a temperature sensor for measuring the strength and the electrical resistivity of the target ground, respectively, wherein the front end cone is formed into a conical shape at the lower end, Penetrating cone tip; A main surface sensor mounting portion which is threadably engaged with the conical cone tip and accommodates a connection cable connected to the electrode sensor and the temperature sensor; And a cone body having a pair of electrode sensor holes formed on one side thereof and a temperature sensor hole formed on the opposite side of the pair of electrode sensor holes and engaged with the main surface sensor mounting portion, The strength and electrical resistivity of the target soil are inversely analyzed according to the electrical resistivity and the temperature, respectively, so that the degree of relaxation and wetness of the target ground can be determined.

Here, the electrode sensor and the temperature sensor are respectively disposed at the lower end of the impregnated rod, and the electrode sensor measures the electrical resistivity of the ground, and the temperature sensor can measure the temperature of the ground.

Here, the strength and electrical resistivity characteristics of the ground can be inversely analyzed through the measured values of the electrode sensor and the temperature sensor, so that the degree of relaxation and wetness of the target ground can be determined, and the permittivity of the target ground can be obtained therefrom.

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Here, a pair of recessed grooves may be formed at an upper end of the cone body to engage with protrusions formed in the main surface sensor mounting portion.

Here, the cone body is cut at a predetermined distance from both ends of the cone body in the direction in which the respective sensor holes are formed, and each of the electrode sensor and the temperature sensor is connected by an electrode connecting cable and a temperature sensor connecting cable, Can be connected to each other.

As another means for achieving the above-mentioned technical object, the surface transmission radar survey system for correcting the dielectric constant characteristic of the ground using the dynamic cone penetrator according to the present invention is characterized in that the surface- Surface survey radar (GPR) surveying equipment to acquire cross-sectional images of the target ground; And a distal end cone that is installed at a predetermined interval or at an abnormal signal acquisition position on the target ground to compensate for errors and distortions that may occur when a false dielectric constant is substituted according to the result of the GPR probe, And a dynamic cone penetrator for measuring a strength and an electrical resistivity of the target ground and calculating a permittivity of the target ground, wherein the dynamic cone penetrator comprises: A drop hammer dropping at a set height to load impact energy; A hammer guide for guiding the movement of the drop hammer; An anvil for transmitting the impact energy transmitted from the drop hammer; A penetration rod extending longitudinally from the anvil and receiving a connecting cable; And a front end cone connected to an end of the penetration rod and provided with an electrode sensor and a temperature sensor for measuring the strength and the electrical resistivity of the target ground, respectively, wherein the front end cone is formed into a conical shape at the lower end, Penetrating cone tip; A main surface sensor mounting portion which is threadably engaged with the conical cone tip and accommodates a connection cable connected to the electrode sensor and the temperature sensor; And a cone body having a pair of electrode sensor holes formed on one side thereof and a temperature sensor hole formed on the opposite side of the pair of electrode sensor holes and engaged with the main surface sensor mounting portion, The dielectric constant is calculated by determining the degree of relaxation and the wet state of the target soil by inversely analyzing the strength and electrical resistivity characteristics of the target ground according to the electrical resistivity and temperature measured at the respective locations.

Here, the electrode sensor and the temperature sensor are respectively disposed at the lower end of the impregnated rod, and the electrode sensor measures the electrical resistivity of the ground, and the temperature sensor can measure the temperature of the ground.

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As a further means for accomplishing the above technical object, there is provided a surface transmission radar surveying method for correcting a dielectric constant characteristic of a ground using a dynamic cone penetrator according to the present invention, comprising the steps of: a) Obtaining a cross-sectional image of the target ground; b) performing an electrical resistivity dynamic cone penetration test at a predetermined interval or an abnormal signal acquisition position in order to correct errors and distortions that may occur in erroneous dielectric constant substitution according to the result of the GPR probe; c) measuring the strength and electrical resistivity of the target ground using a dynamic cone penetrator and calculating a dielectric constant; And d) correcting the probe result of the GPR probe according to the result calculated through the dynamic cone penetrator, wherein the dynamic cone penetrator comprises an electrode sensor for measuring the strength and electrical resistivity of the target ground, And the strength and electrical resistivity characteristics of the target soil are inversely analyzed according to the electrical resistivity and the temperature measured by the electrode sensor and the temperature sensor, respectively, so that the degree of relaxation and wetness And the like.

Here, in the step a), the GPR probe may acquire an electromagnetic wave in a time series in which the dielectric constant is not substituted, or perform a search assuming a dielectric constant.

In the step d), the electrical characteristics of the target ground obtained in the step c) may be corrected by substituting the electromagnetic wave signals obtained in the time series of the step a), or the assumed permittivity may be corrected.

According to the present invention, the degree of relaxation and wetness of the target ground can be determined by inverse analysis of not only the strength of the ground but also the electrical resistivity characteristic through the electrode sensor and the temperature sensor.

According to the present invention, it is possible to measure the electric resistance value of the ground through the electrode, determine the electrical resistivity value, correct the electrical resistivity value through the temperature sensor, and more accurately measure the dielectric constant of the target ground.

According to the present invention, the electrode sensor and the temperature sensor are rigidly mounted on the dynamic cone penetrator, and the necessary constants in the target ground can be stably and effectively measured while preventing breakage of the electrode sensor and the temperature sensor when the cone penetrates.

According to the present invention, since the electrical resistance value and the temperature can be accurately measured, the electrical resistivity value can be effectively corrected.

According to the present invention, the reliability of the surface transmission radar can be improved by correcting the surface transmission radar survey result through the dielectric constant obtained through the dynamic cone penetrator.

According to the present invention, since the accurate permittivity can be applied to the target ground, high reliability can be obtained when calculating the depth of the boundary of the ground layer.

According to the present invention, high-resolution correction according to the depth of the ground is possible by profiling the electrical resistivity and permittivity characteristics according to the depth of the ground.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a general surface transmission radar (GPR) surveying method.
2 is a view showing a dynamic cone penetrator according to the prior art.
3 is a view showing a dynamic cone penetrator for measuring the strength and electrical resistivity of a ground according to an embodiment of the present invention.
4 is a view for explaining the penetration operation of the dynamic cone pipe for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention, the strength of the ground and the electrical resistivity measuring operation.
5 is a diagram illustrating the measurement of the strength and electrical resistivity of the ground through a dynamic cone penetrator for measuring the strength and electrical resistivity of the ground according to an embodiment of the present invention.
6 is a view showing a front end cone in which an electrode sensor and a temperature sensor are installed in a dynamic cone piping for measuring strength and electrical resistivity of a ground according to an embodiment of the present invention.
FIG. 7 is a diagram specifically showing a main surface sensor mounting portion in the distal cone shown in FIG. 6. FIG.
8 is a view showing a cone body to be fastened to the main surface sensor mounting portion shown in FIG.
FIG. 9 is a cross-sectional view specifically illustrating installation of an electrode sensor and a temperature sensor in the cone body shown in FIG. 8. FIG.
10 is a view schematically showing a surface transmission radar surveying system for correcting the dielectric constant characteristics of a ground using a dynamic cone penetrator according to an embodiment of the present invention.
11 is a diagram illustrating strength characteristics and electrical resistivity characteristics measured in a dynamic cone pipe for strength and electrical resistivity measurement according to an embodiment of the present invention.
FIG. 12 is a diagram illustrating a result of a survey in a surface transmission radar survey system for correcting the dielectric constant characteristics of a ground using a dynamic cone penetrator according to an embodiment of the present invention.
13 is a flowchart illustrating an operation of a surface transmission radar surveying method for correcting a dielectric constant characteristic of a ground using a dynamic cone penetrator according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Dynamic Cone Irrigation for Strength and Electrical Resistivity Measurement of Soil (100)]

3 shows a dynamic cone penetrator for measuring the strength and electrical resistivity of a ground according to an embodiment of the present invention. Fig. 3 (a) is a vertical sectional view of the dynamic cone pipe 100, and Fig. 3 (b) 3 (c) is a diagram specifically showing a temperature sensor 180 installed in the distal end cone. As shown in Fig.

Referring to FIG. 3, the dynamic cone pipe 100 for measuring the strength and electrical resistivity of a ground according to an embodiment of the present invention is a device capable of measuring strength and electrical resistivity of a target ground, A cushion 130, an anvil 140, a penetration rod 150, a tip cone 160, an electrode sensor 170, and a temperature sensor 170. [ (180).

Generally, the range of movement of electrons or ions is limited to the cross-sectional area of the two electrode sensors 170, and the electrical resistivity and electrical resistivity have a linear relationship. Accordingly, the dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention can convert an electrical resistance value measured through the two electrode sensors 170 into an electrical resistivity value .

In addition, the dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention takes into consideration that the electrical resistivity characteristic may vary with temperature, And the reliability of the resultant value can be improved by correcting the measured electrical resistivity characteristic value.

As shown in FIG. 3A, the drop hammer 110 is dropped at a predetermined height to transmit a constant energy to the tip cone, which is a penetration point. Thus, the dynamic hammer 110 for strength and electrical resistivity measurement according to the embodiment of the present invention (100) to the target ground.

The hammer guide 120 serves to guide the movement of the drop hammer 110.

The anvil 140 and the cushion 130 transfer impact energy from the drop hammer 110 to the intruder. That is, the anvil 140 transmits the impact energy loaded from the drop hammer 110, and the cushion 130 is connected to the dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention ) To absorb the impact energy.

The penetration rod 150 extends longitudinally from the anvil 140 and serves to protect the connection cable 190 connected to the electrode sensor 170 and the temperature sensor 180. Here, the connection cable 190 includes an electrode connection cable 190a and a temperature sensor connection cable 190b, as shown in b) and c) of FIG. 3, respectively.

The tip cone 160 is connected to the end of the penetration rod 150 and is provided with an electrode sensor 170 and a temperature sensor 180 for measuring the strength and electrical resistivity of the target ground.

The electrode sensor 170 and the temperature sensor 180 respectively measure electrical resistivity and temperature of the ground as shown in FIG. 3 b) and FIG. 3 c, respectively, And the temperature sensor connecting cable 190b, respectively, to the LCR meter and the thermometer.

The dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention is characterized in that the strength of the ground and the strength of the soil are measured according to the electrical resistivity and temperature measured by the electrode sensor 170 and the temperature sensor 180, And the resistivity characteristics can be inversely analyzed to determine the degree of relaxation and wetting of the soil.

4 is a view for explaining the penetration of the dynamic cone pipe for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention, the strength of the ground and the electrical resistivity measuring operation, FIG. 5 is a view In which the strength and electrical resistivity of the ground are measured through the dynamic cone penetrator for measuring the strength and electrical resistivity of the soil according to the embodiment of the present invention.

As shown in FIG. 4, the dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention is intruded and measured while being supported by a predetermined support, As shown in Fig. 4 (a), the dynamic hull girder 100 for measuring the strength and electric resistivity of the ground is prepared for penetration, and then, as shown in Fig. 4 (b) ), And then, the number of strokes and the amount of penetration of the drop hammer 110 are measured. Next, as shown in FIG. 4C, the electrical resistivity and the temperature are measured at a predetermined depth of the target ground, and then the drop hammer 110 is again waved as shown in FIG. 4D) And then repeating steps b) and c) of FIG. 4 by measuring the electrical resistivity and temperature.

The dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention causes dynamic penetration of the entire pipe wall due to a constant energy transfer from the drop hammers 110. At this time, The amount of dynamic penetration is calculated as DCPI (mm / blow) value, so that the strength characteristics of the ground can be grasped.

The dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention is characterized in that the electrode sensor 170 and the temperature sensor 180 are provided on the distal end cone 160 The electrical resistivity can be confirmed by the LCR meter 310 connected to the electrode sensor 170 through the electrode connection cable 190a, The temperature can be confirmed by a thermometer 320 connected to the temperature sensor 180 through the connection cable 190b. The electrode connection cable 190a and the temperature sensor connection cable 190b are exposed to the outside through a cable passage hole 151 formed in the lower portion of the anvil 140 and are connected to the LCR meter 310 and / And is connected to the thermometer 320.

Thereafter, the strength and electrical resistivity characteristics of the target ground can be inversely analyzed according to the electrical resistivity and the temperature detected by the LCR meter 310 and the thermometer 320, thereby determining the degree of relaxation and wetness of the target ground .

That is, the dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention has a structure in which the impact load is applied to the target ground requiring the ground survey with a constant potential energy of the drop hammer 110 After the penetration of the dynamic cone pipe 100, the electric sensor 170 and the temperature sensor 180 installed on the distal cone 160 are used to measure the electric characteristics The strength and electrical resistivity characteristics of the target ground are calculated by estimating the resistivity, and the degree of relaxation and wetness of the target ground can be determined by inversely analyzing the measured strength and electrical resistivity characteristics.

6 is a view showing a front end cone in which an electrode sensor and a temperature sensor are installed in a dynamic cone pipe for measuring the strength and electrical resistivity of a ground according to an embodiment of the present invention, FIG. 8 is a view showing a cone body to be fastened to the main surface sensor mounting portion shown in FIG. 7, and FIG. 9 is a sectional view showing the electrode sensor and the temperature sensor in the cone body shown in FIG. And Fig.

6 to 9, in the dynamic cone pipe 100 for measuring the strength and electrical resistivity of the ground according to the embodiment of the present invention, the front end cone 160 is made of a metal material, And includes a cone tip 161, a cone body 162, and a main surface sensor mounting portion 163.

6, the cone tip 161 is conically formed at the lower end of the distal end cone 160 and penetrates into the target ground.

7, the main surface sensor mounting portion 163 is coupled with the conical type cone tip 161 in a threaded manner, and protrusions formed on the main surface sensor mounting portion 163 are formed, and the cone body 162 And also receives a connection cable 190 connected to the electrode sensor 170 and the temperature sensor 180,

The cone body 162 is engaged with the main surface sensor mounting portion 163, that is, a pair of concave grooves is formed at the upper end of the cone body 162 to engage with the protrusion formed on the main surface sensor mounting portion 163 . The cone body 162 includes a pair of electrode sensor holes 170h formed on one side of the cone body 162 as shown in FIG. A temperature sensor hole 180h formed on the opposite side of the pair of electrode sensor holes 170h is formed. 9, both sides of the cone body 162 are cut at a predetermined distance from the end in the direction in which the sensor holes 170h and 180h are formed, The electrode sensor 170 and the temperature sensor 180 are connected to each other by the connecting cable 190a and the temperature sensor connecting cable 190b.

As a result, according to the embodiment of the present invention, the degree of relaxation and the state of wetness of the target ground can be judged through inverse analysis of not only the strength of the ground but also the electrical resistivity characteristic through the electrode sensor 170 and the temperature sensor 180 .

According to the embodiment of the present invention, the electrical resistance value of the ground through the electrode sensor 170 is measured to determine the electrical resistivity value, and the electrical resistivity value is corrected through the temperature sensor 180, The dielectric constant can be measured.

The electrode sensor 170 and the temperature sensor 180 are firmly mounted on the dynamic cone pipe 100 so that damage to the electrode sensor 170 and the temperature sensor 180 can be prevented It is possible to stably and effectively measure the necessary constants in the target ground.

According to the embodiment of the present invention, since the electrical resistance value and the temperature can be accurately measured, the electrical resistivity value can be efficiently corrected.

[Surface Transmission Radar Exploration System Correcting Permittivity Characteristics of Soil Using Dynamic Cone Penetration]

FIG. 10 is a schematic view of a surface transmission radar survey system for correcting the dielectric constant characteristics of a ground using a dynamic cone penetrator according to an embodiment of the present invention. FIG. 12 is a graph illustrating strength characteristics and electrical resistivity characteristics measured in a dynamic cone pipe fitting for resistivity measurement, FIG. 12 is a graph illustrating the characteristics of the resistivity measuring device in the dynamic penetration radar survey system for correcting the dielectric constant characteristics of the ground using the dynamic cone penetrator, FIG. 4 is a diagram illustrating the result of the measurement performed in FIG.

10, the surface transmission radar survey system for correcting the dielectric constant characteristic of the ground using the dynamic cone penetrator according to the embodiment of the present invention includes a dynamic cone piercing apparatus 100 and a GPR surveying apparatus 200 Here, the GPR exploration apparatus 200 is for acquiring a cross-sectional image of the target ground, and will be obvious to those skilled in the art, so a detailed description thereof will be omitted.

The ground penetrating radar (GPR) surveying apparatus 200 is located on the surface of the target ground and acquires a cross-sectional image of the target ground by exploring the target ground. Here, the GPR probe 200 acquires an electromagnetic wave in a time series with no dielectric constant assigned thereto or performs a survey on the assumption of a permittivity, and determines the electrical characteristics of the target ground obtained by the dynamic cone pipe 100, It can be corrected by substituting the electromagnetic wave signal acquired in the time series of the GPR probe 200 or to correct the assumed permittivity.

Specifically, the surface permeation radar (GPR) exploration apparatus 200 acquires electromagnetic waves reflected in the ground using the surface transmission radar. At this time, it is possible to calculate the depth of the ground and the depth of the ground by converting the dielectric constant into the depth by taking the dielectric constant at the arrival time of the reflected electromagnetic wave. In other words, in the prior art, although the dielectric constant recommendation value is used according to the type of the target ground, the value may vary greatly depending on the electrical properties such as the water condition and the density of the ground. By applying a possible dynamic cone piping (100), it is possible to obtain a higher accuracy ground section image by calculating the permittivity applied to the actual strength and electrical characteristics of the target ground and taking the value.

The dynamic cone pumping device 100 is installed at a predetermined interval or at an abnormal signal acquisition position on the target ground to correct errors and distortions that may occur when a wrong dielectric constant is substituted according to the result of the probe of the GPR exploration equipment 200, And an electrode sensor 170 and a temperature sensor 180 provided on the distal end cone 160 measure strength and electrical resistivity of the target ground, The dielectric constant of the target ground is calculated.

Specifically, as described above, the dynamic cone pipe 100 includes a drop hammer 110 dropping at a predetermined height to load impact energy; A hammer guide (120) for guiding movement of the drop hammer (110); An anvil 140 for transferring impact energy delivered from the drop hammer; A penetration rod 150 extending longitudinally from the anvil 140 and receiving the connection cable 190; And a distal end cone (160) connected to an end of the penetration rod (150) and provided with an electrode sensor (170) and a temperature sensor (180) for measuring the strength and electrical resistivity of the target ground, The dielectric constant can be calculated by inversely analyzing the strength and electrical resistivity characteristics of the target soil according to the electrical resistivity and temperature measured by the sensor 170 and the temperature sensor 180, respectively, by determining the degree of relaxation and wetting of the target soil.

In other words, the electrode sensor 170 and the temperature sensor 180 are respectively disposed at the lower end of the penetration rod 150. The electrode sensor 170 measures the electrical resistivity of the ground, And the strength and electrical resistivity characteristics of the ground are inversely analyzed through the measured values of the electrode sensor 170 and the temperature sensor 180 to determine the degree of relaxation and wetness of the target ground And thus, the permittivity of the target ground can be obtained.

At this time, as described above, the distal end cone 160 includes a cone tip 161 formed in a conical shape at the lower end and penetrated into the target ground; A main surface sensor mounting portion 163 screwed to the cone type cone tip 161 and receiving a connecting cable 190 connected to the electrode sensor 170 and the temperature sensor 180; And a pair of electrode sensor holes 170h are formed on one side and a temperature sensor hole 180h is formed on the opposite side of the pair of electrode sensor holes 170h to be fastened to the main surface sensor mounting portion 163 (Not shown).

As described above, since the electrical resistivity characteristics can vary with temperature, the surface transmission radar survey system for correcting the dielectric constant characteristics of the ground using the dynamic cone penetrator according to the embodiment of the present invention, , The electrical resistivity is measured through the electrode sensor 170 and the distribution of the temperature is measured through the temperature sensor 180. The result of the correction is used to correct the measured electrical resistivity characteristic value as shown in FIG. The reliability of the value can be improved, and the correct permittivity can be determined therefrom.

The surface permeation radar surveying system for correcting the dielectric constant characteristics of the ground using the dynamic cone penetrator according to the embodiment of the present invention is characterized in that the permittivity determined in the dynamic cone pipe irradiating device 100 is measured by the surface- It is possible to improve the reliability of the measurement result of the surface transmission radar surveying apparatus 200 by correcting the result of the survey on the surface transmission radar surveying apparatus 200 by applying it to the surveying result.

According to the embodiment of the present invention, by applying the dynamic cone penetrator capable of obtaining electrical resistivity, the permittivity applying the actual strength characteristic and electrical characteristic of the target ground is calculated, and the value is taken, A ground section image can be obtained.

According to the embodiment of the present invention, the reliability of the surface transmission radar can be improved by correcting the surface transmission radar survey result through the dielectric constant obtained through the dynamic cone penetrator. In addition, since it is possible to apply the correct permittivity to the target ground, it is possible to have high reliability in calculating the depth of the boundary of the ground layer. Further, by profiling the electrical resistivity and permittivity characteristics according to the depth of the ground, It is possible to perform a high resolution correction.

[Surface Transmission Radar Surveying Method to Correct the Permittivity Characteristics of Soil Using Dynamic Cone Penetration]

13 is a flowchart illustrating an operation of a surface transmission radar surveying method for correcting a dielectric constant characteristic of a ground using a dynamic cone penetrator according to an embodiment of the present invention.

Referring to FIG. 13, the surface transmission radar surveying method for correcting the dielectric constant characteristic of the ground using the dynamic cone penetrator according to the embodiment of the present invention firstly exploits the target ground through the GPR exploration equipment 200, (S110). ≪ / RTI > Here, the GPR probe 200 acquires an electromagnetic wave in a time series in which the dielectric constant is not substituted, or performs a search assuming a dielectric constant.

Next, an electrical resistivity dynamic cone penetration test is performed at a predetermined interval or at an abnormal signal acquisition position in order to correct errors and distortions that may occur when a wrong dielectric constant is substituted according to the result of the probe of the GPR probe 200 (S120) .

Next, the dynamic cone pipe 100 is used to measure the strength and electrical resistivity of the target ground, and the dielectric constant is calculated (S130). The dynamic cone pipe 100 includes an electrode sensor 170 for measuring a strength and an electrical resistivity of a target ground and a distal end cone 160 having a temperature sensor 180. The electrode sensor 170 170 and the temperature sensor 180, it is possible to determine the degree of relaxation and the wet state of the target ground by inversely analyzing the strength and electrical resistivity characteristics of the target ground according to the electrical resistivity and the temperature, respectively.

Specifically, the electrode sensor 170 and the temperature sensor 180 are disposed at the lower end of the penetration rod 150. The electrode sensor 170 measures an electrical resistivity of the ground, and the temperature sensor 180 measures The temperature of the ground is measured and the strength and electrical resistivity characteristics of the ground are inversely analyzed through the measured values of the electrode sensor 170 and the temperature sensor 180 to determine the degree of relaxation and wetness of the target ground, The dielectric constant of the ground is obtained.

Next, the result of the search of the GPR exploration equipment 200 is corrected according to the result calculated through the dynamic cone pavour machine 100 (S140). Here, the GPR probe 200 can correct the assumed electric permittivity by substituting the electrical characteristics of the target ground obtained in the dynamic cone pipe 100 into the electromagnetic wave signals obtained in the time series.

As a result, according to the embodiment of the present invention, the dielectric constant of the ground is obtained through the strength characteristics and the electrical resistivity characteristics of the ground obtained through the dynamic cone penetrator, and the obtained permittivity is applied to the surface transmission radar survey result, The reliability of the result can be improved.

According to the embodiment of the present invention, by connecting the dynamic cone penetrator with the surface transmission radar surveying apparatus, the reliability of the surface transmission radar surveying apparatus can be increased while improving the efficiency of the permittivity determination.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: (electrical resistivity) Dynamic Conduction
200: Surface penetrating radar (GPR) exploration equipment
310: LCR meter
320: Thermometer
110: Drop Hammer
120: Hammer Guide
130: Cushion
140: Anvil
150: Penetration rod
160: The tip cone (Cone)
161: Cone Tip
162: Cone Body
163: Main surface sensor mounting portion
170: Electrode sensor
180: Temperature sensor
190: Connecting cable
190a: Cable for electrode connection
190b: Cable for connecting temperature sensor

Claims (17)

In order to compensate for errors and distortions that may occur in erroneous dielectric constant substitution according to the result of exploration of the ground penetrating radar (GPR) exploration equipment 200, a dynamic cone In the Dynamic Cone Penetrometer,
A drop hammer 110 falling at a preset height to load impact energy;
A hammer guide (120) for guiding movement of the drop hammer (110);
An anvil 140 for transferring impact energy delivered from the drop hammer;
A penetration rod 150 extending longitudinally from the anvil 140 and receiving the connection cable 190; And
A distal end cone 160 connected to an end of the penetration rod 150 and provided with an electrode sensor 170 and a temperature sensor 180 for measuring the strength and electrical resistivity of the target ground,
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The distal end cone (160) includes a cone tip (161) formed in a conical shape at the lower end and penetrated into the target ground; A main surface sensor mounting portion 163 screwed to the cone type cone tip 161 and receiving a connecting cable 190 connected to the electrode sensor 170 and the temperature sensor 180; And a pair of electrode sensor holes 170h are formed on one side and a temperature sensor hole 180h is formed on the opposite side of the pair of electrode sensor holes 170h to be fastened to the main surface sensor mounting portion 163 And a cone body (162)
The degree of relaxation and the state of wetness of the target ground can be determined by inversely analyzing the strength and electrical resistivity characteristics of the target ground according to the electrical resistivity and temperature measured by the electrode sensor 170 and the temperature sensor 180, respectively Dynamic Cone Irrigation for Resistance and Electrical Resistivity of Soil. The method according to claim 1,
The electrode sensor 170 and the temperature sensor 180 are disposed at the lower end of the penetration rod 150. The electrode sensor 170 measures an electrical resistivity of the ground and the temperature sensor 180 measures the electrical resistivity of the ground Characterized in that the temperature is measured. 3. The method of claim 2,
The strength and the electrical resistivity characteristic of the ground are inversely analyzed through the measured values of the electrode sensor 170 and the temperature sensor 180 to determine the degree of relaxation and wetness of the target ground and to obtain the permittivity of the target ground therefrom A dynamic cone dressing for ground strength and electrical resistivity characterization. delete The method according to claim 1,
And a pair of concave grooves formed at an upper end of the cone body (162) to engage with protrusions formed on the main surface sensor mounting part (163). The method according to claim 1,
The cone body 162 is cut at a predetermined distance from both ends of the cone body 162 in the direction in which the sensor holes 170h and 180h are formed and connected to the electrode connection cable 190a and the temperature sensor connection Characterized in that each of the electrode sensors (170) and the temperature sensor (180) are connected to each other by a cable (190b) for the electrical resistance. 1. An indicator penetrating radar (GPR) survey system,
An apparatus for surveying GPR 200 located on a surface of a target ground to acquire a cross-sectional image of the target ground by exploring the target ground; And
The GPR probe 200 is installed at a predetermined interval or at an abnormal signal acquiring position on the target ground to correct errors and distortions that may occur when a wrong dielectric constant is substituted according to the result of the probe, The electrode sensor 170 and the temperature sensor 180 provided on the distal end cone 160 measure the strength and electrical resistivity of the target ground and calculate the dielectric constant of the target ground The dynamic cone placement (100)
, Wherein the dynamic cone pipe (100)
A drop hammer 110 falling at a preset height to load impact energy;
A hammer guide (120) for guiding movement of the drop hammer (110);
An anvil 140 for transferring impact energy delivered from the drop hammer;
A penetration rod 150 extending longitudinally from the anvil 140 and receiving the connection cable 190; And
A distal end cone 160 connected to an end of the penetration rod 150 and provided with an electrode sensor 170 and a temperature sensor 180 for measuring the strength and electrical resistivity of the target ground,
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The distal end cone (160) includes a cone tip (161) formed in a conical shape at the lower end and penetrated into the target ground; A main surface sensor mounting portion 163 screwed to the cone type cone tip 161 and receiving a connecting cable 190 connected to the electrode sensor 170 and the temperature sensor 180; And a pair of electrode sensor holes 170h are formed on one side and a temperature sensor hole 180h is formed on the opposite side of the pair of electrode sensor holes 170h to be fastened to the main surface sensor mounting portion 163 And a cone body (162)
It is possible to determine the degree of relaxation and wetness of the target ground by inversely analyzing the strength and electrical resistivity characteristics of the target ground according to the electrical resistivity and temperature measured by the electrode sensor 170 and the temperature sensor 180, A ground penetrating radar survey system that corrects the dielectric constant characteristics of the ground using a dynamic cone penetrator. 8. The method of claim 7,
The electrode sensor 170 and the temperature sensor 180 are disposed at the lower end of the penetration rod 150. The electrode sensor 170 measures an electrical resistivity of the ground and the temperature sensor 180 measures the electrical resistivity of the ground Wherein the temperature is measured by using a dynamic cone penetrometer. delete delete A surface transmission radar survey method for correcting a dielectric constant characteristic of a ground using a dynamic cone penetrator,
a) acquiring a cross-sectional image of a target ground by exploring a target ground through a ground penetrating radar (GPR) exploration apparatus 200;
b) performing an electrical resistivity dynamic cone penetration test at a predetermined interval or abnormal signal acquisition position in order to correct errors and distortions that may occur in erroneous dielectric constant substitution according to the result of the probe of the GPR probe 200;
c) measuring the strength and electrical resistivity of the target ground by using the dynamic cone pipe 100 and calculating the dielectric constant; And
d) correcting the probe result of the GPR probe 200 according to the result calculated through the dynamic cone pacemaker 100
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The dynamic cone pipe installation unit 100 includes an electrode sensor 170 for measuring the strength and electrical resistivity of the target ground and a front end cone 160 on which the temperature sensor 180 is installed. And a temperature sensor 180, the strength and electrical resistivity characteristics of the target soil are inversely analyzed according to the electrical resistivity and the temperature, respectively, so that the degree of relaxation and wetness of the target ground can be determined A method of surface - penetrating radar survey that corrects the permittivity of ground. 12. The method of claim 11,
In the step a), the GPR probe 200 acquires an electromagnetic wave in a time series with no dielectric constant assigned thereto or conducts a survey on the assumption of a permittivity. In the dynamic cone penetrator, the dielectric constant characteristic of the ground is corrected Survey method of surface transmission radar. 13. The method of claim 12,
Wherein the step (d) comprises the step of correcting the electric characteristic of the target ground obtained in the step (c) by substituting the electric characteristic obtained in the time series of the step (a) into the electromagnetic wave signal or correcting the assumed permittivity, A method of surface - penetrating radar survey to calibrate the permittivity characteristics of ground using. 12. The apparatus of claim 11, wherein the dynamic cone-
A drop hammer 110 falling at a preset height to load impact energy;
A hammer guide (120) for guiding movement of the drop hammer (110);
An anvil 140 for transferring impact energy delivered from the drop hammer;
A penetration rod 150 extending longitudinally from the anvil 140 and receiving the connection cable 190; And
A distal end cone 160 connected to an end of the penetration rod 150 and provided with an electrode sensor 170 and a temperature sensor 180 for measuring the strength and electrical resistivity of the target ground,
≪ / RTI >
The distal end cone (160) includes a cone tip (161) formed in a conical shape at the lower end and penetrated into the target ground; A main surface sensor mounting portion 163 screwed to the cone type cone tip 161 and receiving a connecting cable 190 connected to the electrode sensor 170 and the temperature sensor 180; And a pair of electrode sensor holes 170h are formed on one side and a temperature sensor hole 180h is formed on the opposite side of the pair of electrode sensor holes 170h to be fastened to the main surface sensor mounting portion 163 And a cone body (162)
It is possible to determine the degree of relaxation and wetness of the target ground by inversely analyzing the strength and electrical resistivity characteristics of the target ground according to the electrical resistivity and temperature measured by the electrode sensor 170 and the temperature sensor 180, A method of surface - penetrating radar surveying that corrects the dielectric constant characteristics of ground using dynamic cone penetrator. 15. The method of claim 14,
The electrode sensor 170 and the temperature sensor 180 are disposed at the lower end of the penetration rod 150. The electrode sensor 170 measures an electrical resistivity of the ground and the temperature sensor 180 measures the electrical resistivity of the ground And measuring a temperature of the ground penetrating radar, wherein the dielectric con- tinuity characteristic of the ground is corrected by using a dynamic cone penetrator. delete delete

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