KR20190086881A - Rock joint shear test system - Google Patents

Abstract

The present invention relates to an apparatus for testing a shear of a joint plane of a rock. According to an embodiment of the present invention, the apparatus for testing the shear of the joint plane of the rock sample, which includes a first rock sample and a second rock sample, which are placed to face each other along the joint plane formed in a longitudinal direction, comprises: a base unit placed on a lower side of the rock sample to support the rock sample; and a pressurizing unit which includes a pressurizing main frame unit at least a part of whose one end is opened, a plate member placed to cover the opening of the pressurizing main frame unit, and an elastic member fixated inside of the pressurizing main frame unit to be connected to and support the plate member. The pressurizing main frame unit is able to be placed on an upper side of the rock sample to pressurize and shear the first rock sample, and to form an upper sample accommodation space to accommodate the second rock sample which makes a relative motion against the first rock sample. The present invention aims to provide the apparatus for testing the shear of the joint plane of the rock, which is able to control hydraulic conditions and to observe a change in dynamic behavior.

Description

[0002] Rock joint shear test system [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock shear front end shear test apparatus, and more particularly, to a rock shear surface shear test apparatus that is essentially performed to estimate the mechanical properties of rocks under tunnel, slope, and mine environments.

Rocks are composed of intact rocks and numerous discontinuities. The discontinuities of size, which greatly affect the mechanical properties of rocks, are represented by joints. Since this joint acts as a soft surface, it is essential to understand the mechanical behavior of joints in evaluating the stability of rock structures such as tunnels and slopes.

Among them, the properties related to the shear behavior of joint surfaces (adhesion strength, friction angle, expansion angle, etc.) are very important input values in stability analysis. The shear behavior of the joint faces is influenced by various factors such as the roughness, normal stress, filler, and joint strength of the joint surface, and direct shear test is most widely performed considering these conditions. As a result of the direct shear test, friction angle, adhesive strength, etc. are obtained, and this result is applied to the shear behavior equation to evaluate the stability of the rock structure.

Also, since the hydraulic conductivity of the rock itself is generally very small, the fluid mostly flows through the discontinuity in the rock. Therefore, in order to analyze the hydraulic behavior of the rock, it is very important to estimate the repair properties (hydraulic conductivity, permeability coefficient, etc.) of the joint surface. The repair behavior along the joint faces is also influenced by various factors such as roughness, load conditions and stiffness. Among them, the aperture and contact area of the joint faces are known to be the most important factors.

The factor is an important factor in determining the hydraulic behavior of the rock, which is again influenced by mechanical factors such as roughness and stiffness. Therefore, coupling of mechanistic and mathematical conditions is essential.

Therefore, it is necessary to establish experimental equipment to experimentally identify changes in hydraulic properties by controlling the shear behavior in the state where normal stress is applied to the joint surfaces of rocks, and to observe mechanical behavior changes by controlling hydraulic conditions. Satisfying equipment typically requires very expensive shear and repair modules.

Korean Patent Publication No. 10-2005-0103350

The present invention has been conceived in view of the above circumstances, and it is an object of the present invention to elucidate experimentally the change of the hydraulic property by controlling the shear behavior of the rock test piece with respect to the joint surface in a state where normal stress is applied to the joint surface of the rock test piece, The present invention is directed to a rock shear surface shear test apparatus capable of observing changes in mechanical behavior.

In order to accomplish the above object, a rock shear front end shear test apparatus according to an embodiment of the present invention includes a first rock test piece and a second rock test piece arranged to face each other along a longitudinally formed joint surface, A base portion disposed on and supporting the rock test piece; And an elastic member fixed inside the pressing body portion and connected to and supported by the plate member, wherein the pressing member includes at least one of a pressing body portion having an opening and at least a part of which is open at one end, Wherein the pressing body portion is disposed on an upper portion of the rock test piece and presses and shears the first rock test piece so that the second rock test piece relatively moving with respect to the first rock test piece is received Space can be formed.

The base portion may be formed symmetrically with the pressing portion, and the lower test piece accommodating space may be formed to accommodate the first rock test piece.

Wherein the base portion includes: a base body portion having at least one end thereof opened and having the lower test piece accommodating space therein communicated with the open end; a support member provided to cover an opened end of the base body portion; And a spring member fixed inside the base body portion and connected to the support member.

The elastic member may be provided in the upper test piece accommodating space.

The pressurizing body portion may include a horizontal flow passage vertically penetrating a predetermined portion of the outer circumference and a vertical flow passage vertically passing through the inner ceiling portion forming the test piece receiving space and communicating with the horizontal flow passage.

The pressurization body may be connected to a fluid injector for allowing a fluid to flow through the horizontal flow path and the vertical flow path for measuring hydraulic conductivity between the first and second rock test pieces.

The pressing body portion may be formed with a rod guide projecting while crossing the center portion so as to be sandwiched between the first and second rock test pieces.

And a support portion provided for maintaining the horizontal position of the base portion and the pressing portion, wherein the support portion includes a lower plate member in which the base portion is disposed, a top plate member in which the pressing portion is fitted, And a plurality of guide rods connecting the guide rods.

A load generating unit for generating a load for moving the pressing unit in a downward direction; And a load transmitting unit provided between the load generating unit and the lower plate member and transmitting a load of the load generating unit to the lower plate member.

And an impermeable membrane provided to enclose the rock test piece.

And a displacement measuring unit provided to surround the rock test piece and measuring a radial displacement of the rock test piece.

And a chamber portion for receiving the rock test piece, the base portion, and the pressing portion, wherein the chamber portion may have a pressure storage space capable of pressure adjustment so as to provide a pressure in a direction perpendicular to the joint surface of the rock test piece have.

Therefore, according to the rock shear front end shear test apparatus according to the embodiment of the present invention, it is possible to provide a horizontal load on the joint surface of the rock test piece through the control of the load generating portion and precisely measure and control the shear displacement of the rock specimen At the same time, the shear stress can be measured from the axial bottom of the rock specimen.

Further, the vertical pressure acting in a direction perpendicular to the joint surface can be measured and controlled through the chamber part control.

In addition, since the measurement equipment such as the displacement measuring unit can be installed on the rock test piece, the radial compression and the expansion displacement of the rock test piece can be measured and controlled.

In addition, measurement of radial expansion displacement of rock specimens can measure very important results in analysis of joint repair behavior such as expansion angle and gap, and it is possible to measure various mechanical properties such as constant vertical pressure, The conditions can be reflected in the test.

Also, it is possible to measure and control the injection pressure and injection amount of the fluid through the hydraulic control device.

In addition, it is possible to perform dynamic and numerical tests on joint surfaces of rock specimens under various conditions, and it is possible to construct equipments very economically as compared with existing equipments, and it is possible to measure more various properties, It can be used in various fields of civil engineering and resource development that require interpretation.

1 is a photograph of a rock shear surface shear test apparatus according to an embodiment of the present invention.
2 is a sectional view of a rock shear surface shear test apparatus according to an embodiment of the present invention.
3 is a perspective view of a base according to an embodiment of the present invention.
4 is a cross-sectional view of a base according to an embodiment of the present invention.
5 is a perspective view of a pressing portion according to an embodiment of the present invention.
6 is a cross-sectional view of a pressing portion according to an embodiment of the present invention.
7 is a partial structural view of a support according to an embodiment of the present invention.
8 is an operational state diagram of a rock shear surface shear test apparatus according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

1 and 2, a rock joint plane shear test apparatus 100 according to an embodiment of the present invention includes a first rock test piece 210 disposed to face along a joint surface JS formed in a longitudinal direction, A base portion 120, a pressing portion 130, a support portion 140, a load generating portion 150 (see FIG. 1), and a load generating portion 150 A load transmitting portion 160, an impermeable film 170, and a displacement measuring portion 180. [0031]

The chamber part 110 includes a base part 120, a pressing part 130, a supporting part 140, a load generating part 150, a load transmitting part 160, an impermeable film 170 and a displacement measuring part 180 ). The base portion 120 is disposed and supported at the lower portion of the rock test piece 200. The pressing portion 130 may be disposed on the rock test piece 200 to press the first rock test piece 210. The pressurizing part 130 is formed inside the test piece accommodating space TS so as to accommodate the second rock test piece 220 that performs relative movement with the first rock test piece 210 by pressing and shearing the first rock test piece 210 . The support portion 140 may be provided to maintain the horizontal position of the base portion 120 and the pressing portion 130. The load generating unit 150 may generate a load for moving the pressing unit 130 downward. The load transfer unit 160 may be provided between the pressing unit 130 and the load generating unit 150 to transmit the load of the load generating unit 150 to the pressing unit 130. The impermeable membrane 170 may be provided to enclose the rock specimen 200 to maintain airtightness with the space inside the chamber part 110. The displacement measuring unit 180 is provided to enclose the impermeable film 170 to measure the radial displacement of the rock test piece 200.

When the first rock test piece 210 is pressurized by the pressing portion 130, the rock joint surface shear test apparatus 100 according to the embodiment of the present invention having the above-described structure is configured such that the base portion 120 And the upper test piece receiving space TTS is formed in the pressing portion 130, the first rock test piece 210 is accommodated in the lower test piece receiving space (BTS) , And the second rock test piece 220 is accommodated in the upper test piece accommodating space (TTS), the joint surface shear test of the rock test piece 200 is possible.

Hereinafter, the configuration of the apparatus for testing rock shear front ends 100 according to the embodiment of the present invention will be described in detail.

The chamber part 110 may be a triaxial compression chamber. The chamber portion 110 has a rigidity required for performing the test, and has a sufficient pressure storage space SP therein. The pressure storage space SP includes a chamber portion 110, a base portion 120, a pressing portion 130, a support portion 140, a load generating portion 150, a load transmitting portion 160, an impermeable film 170, And a displacement measuring unit 180 may be provided. The chamber part 110 can apply pressure in a direction perpendicular to the joint surface JS of the rock test piece 200 by using the hydraulic fluid in the pressure storage space SP. The chamber part 110 is capable of adjusting the pressure of the pressure storage space SP by servo control.

The base portion 120 is disposed and supported at the lower portion of the rock test piece 200. The base part 120 is characterized in that a lower test piece accommodating space (BTS) is formed therein to receive the first rock test piece 210 which is moved downward by the pressing part 130 and moves downward.

3 and 4, the base portion 120 may include a base body portion 121, a support member 123, and a spring member 125.

The base body portion 121 may be cylindrical. At least a part of the upper end of the base body portion 121 may be opened. The base body portion 121 may have a lower test piece accommodating space (BTS) communicating with an opened end thereof. The first rock test piece 210 may be accommodated in the lower test piece accommodation space (BTS) as described above. The base body 121 may have a central guide 121a protruding from the center of the base body 121. The center guide 121a may be interposed between the first rock test piece 210 and the second rock test piece 220. The center guide 121a helps to align the first rock test piece 210 and the second rock test piece 220.

The base body portion 121 is characterized in that a horizontal flow path BHP and a vertical flow path BVP are formed. The horizontal flow path BHP is formed by vertically penetrating a predetermined portion of the outer circumference of the base body portion 121. The vertical flow path BVP is formed by vertically penetrating the inner bottom surface of the base body portion 121 forming the lower test piece accommodating space (BTS). Here, the vertical flow passage BVP communicates with the horizontal flow passage BHP. The vertical flow path BVP and the horizontal flow path BHP are connected to the fluid discharge hose BHP through which the fluid flowing into the lower test piece accommodating space BTS along the joint surface JS of the rock test piece 200 is connected to the horizontal flow path BHP Not shown). The fluid discharged through the fluid discharge hose can be used to measure the hydraulic conductivity of the joint surface (JS) of the rock test piece (200). Here, hydraulic conductivity is a measure of the ease with which a fluid passes through a porous medium such as soil or rock.

The support member 123 may be provided to cover one open end of the base body 121. The support member 123 may be formed in a semi-disc shape. The support member 123 is held in contact with the first rock test piece 210 when the base body portion 121 is disposed below the rock test piece 200. The support member 123 is held by the spring member 125.

The spring member 125 may be provided in the lower rock portion receiving space (BTS). The spring member 125 has one end connected to the inner bottom surface of the base body portion 121 and the other end connected to the support member 123 to provide a supporting force. The spring member 125 is urged by the pressing portion 130 so that the abrupt vertical movement of the first rock test piece 210 when the first rock test piece 210 is received in the lower rock portion receiving space BTS .

Referring again to FIGS. 1 and 2, the pressing portion 130 may be formed to have a shape symmetrical to the base portion 120. The pressing portion 130 can be disposed on the rock test piece 200 and pressurized. The pressurizing portion 130 pressurizes and presses the first rock test piece 210 to form an upper test piece receiving space TTS so that the second rock test piece 220 is moved relative to the first rock test piece 210 .

5 and 6, the pressing portion 130 may include a pressing body portion 131, a plate member 133, and an elastic member 135.

The pressing body portion 131 may be cylindrical. At least a part of the lower end of the pressing main body part 131 can be opened. An upper test piece receiving space (TTS) communicating with one end of the pressurizing main body portion 131 may be formed therein. In the upper test piece accommodating space (TTS), the second rock test piece 220 may be accommodated as described above. The pressing body 131 may have a rod guide 131a protruding from the bottom surface of the pressing body 131 while crossing the center thereof. The rod guide 131a may be interposed between the first rock test piece 210 and the second rock test piece 220. The rod guide 131a helps to align the first rock test piece 210 and the second rock test piece 220.

The pressurizing body portion 131 is characterized in that a horizontal flow path THP and a vertical flow path TVP are formed. The horizontal flow path THP is formed by vertically penetrating a predetermined portion of the outer peripheral portion of the pressing main body 131. The vertical flow path TVP is formed by vertically penetrating the inner ceiling surface of the base body portion 121 forming the upper test piece accommodating space TTS. The vertical flow path TVP communicates with the horizontal flow path THP. Here, it is connected to a fluid injector (not shown) in the horizontal flow path THP. The fluid injector can inject fluid into the horizontal flow path THP for measuring the hydraulic conductivity of the joint surface JS of the rock test piece 220. [ The fluid injected into the horizontal flow path THP is discharged through the horizontal flow path THP and the vertical flow path TVP into the upper test piece accommodation space TTS. The fluid then flows into the space between the first rock test piece 210 and the second rock test piece 220 through one lower open end of the pressurizing main body part 131 and then flows along the joint surface JS of the rock test piece 200 And discharged into a fluid discharge hose (not shown) connected to the vertical flow path BVP of the base body portion 121 and the horizontal flow path BHP. The fluid discharged through the fluid discharge hose can be used to measure the hydraulic conductivity of the joint surface (JS) of the rock test piece (200).

The plate member 133 may be provided so as to cover one open end of the pressurizing body portion 131. The plate member 133 may be formed in a semi-disc shape. The plate member 133 contacts the first rock test piece 210 when the pressurizing body portion 131 is disposed on the rock test piece 200.

The elastic member 135 may be provided in the upper rock portion receiving space TTS. One end of the elastic member 135 is connected to the inner ceiling surface of the pressing main body 131 and the other end is connected to the plate member 133. The elastic member 135 supports the plate member 133 so as to be in contact with the upper surface of the second rock test piece 220.

1 and 2, the support portion 140 supports the rock test piece 200, the base portion 120, and the pressing portion 130 to maintain a stable horizontal posture. The support portion 140 supports the lower plate member 141, An upper plate member 143 and a plurality of guide rods 145. [

The lower plate member 141 may be provided with a base portion 120 inserted therein. The upper plate member 143 may be disposed with the pressing portion 130 inserted therein. The plurality of guide rods 145 can connect the lower plate member 141 and the upper plate member 143. The supporting portion 140 having the above-described configuration supports the base portion 120, the pressing portion 130, and the rock test piece 200 in a horizontal posture during the pressing operation of the pressing portion 130. That is, the support portion 140 is necessary to prevent the phenomenon of twisting or the like during pressing operation of the pressing portion 130 and to cause displacement of the rock test piece only in the vertical direction.

7 (a), the lower plate member 141 may be in the form of a disk. A guide ring 141a may protrude from the upper surface of the lower plate member 141 at the center thereof. The inner diameter of the guide ring 141a is preferably substantially the same as the outer diameter of the base body portion 121 of the base portion 120. The base body portion 121 can be inserted into the guide ring 141a. A separate fixing pin (not shown) may be formed at the center of the lower plate member 141. The lower plate member 141 can be fixed by inserting the fixing pin into the lower central portion of the base body portion 121.

The lower plate member 141 may be formed with the lower guide holes Bh at intervals of 120 degrees with respect to the central axis along the circumference. A guide rod 145 can be fitted to the lower guide hole Bh.

Referring to FIG. 7 (b), the upper plate member 143 may be formed symmetrically with the lower plate member 141. The lower plate member 143 may have a guide ring 143a protruding from the center of the lower surface thereof. The inner diameter of the guide ring 143a is preferably substantially the same as the outer diameter of the pressing body portion 131 of the pressing portion 130. [ So that the pressurizing main body 131 can be fitted to the guide ring 143a. The upper plate member 143 may be formed with a separate fixing pin (not shown) at the center thereof. The upper plate member 143 can be fixed by inserting the fixing pin into the upper center portion of the pressing body portion 131. [

The upper guide member (Th) may be formed at intervals of 120 degrees with respect to the central axis along the perimeter of the upper plate member (143). The upper plate member 143 may be disposed on the upper portion of the pressing portion 130 such that the upper guide hole Th is coaxial with the lower guide hole Bh. A guide rod 145 can be fitted in the upper guide hole Th. Here, the guide rod 145 may be a circular rod. The guide rod 145 protrudes from the top of the upper plate member 143 through the upper guide hole Th during the pressing operation of the pressing portion 130. [

1 and 2, the load generating part 150 is a part where a load is generated by a separate actuator device. The load generating part 150 is provided on the upper part of the chamber part 110. The load of the load generating unit 150 causes the pressing unit 130 to move downward. The load transmitting portion 160 is provided between the load generating portion 150 and the upper plate member 141. The load transmission portion 160 may be disposed so as to contact the upper plate member 141. The load transfer unit 160 can transfer the load of the load generating unit 150 to the upper plate member 141 and the pressing unit 130.

The impermeable membrane 170 may be provided to enclose the rock test piece 200. The impermeable membrane 170 is used to isolate the rock test piece 200 from the pressure storage space SP of the chamber part 110. The impermeable membrane 170 is preferably made of an impermeable material to prevent the hydraulic fluid in the pressure storage space SP of the chamber part 110 from being retained in the rock test piece 200. The impermeable membrane 170 is preferably formed of a stretchable material to allow radial displacement of the rock test piece 200. Between the impermeable membrane 170 and the base portion 120 and between the impermeable membrane 170 and the pressing portion 130 prevents the hydraulic fluid in the pressure storing space SP from flowing into the rock test piece 200 The airtightness is maintained by a separate waterproof tape.

The displacement measuring unit 180 measures the radial displacement of the rock test piece 200 and may be provided to enclose the rock test piece 200. That is, the displacement measuring unit 180 may be provided to surround the impermeable membrane 170 surrounding the rock test piece 200. The displacement measuring unit 180 may be a kind of extensometer. The displacement measuring unit 180 is formed in a stretchable structure so as to allow radial displacement of the rock test piece 200.

Hereinafter, with reference to FIG. 2 and FIG. 8, a description will be given of a test procedure of the apparatus for testing rock shear surface shearing apparatus 100 according to the embodiment of the present invention.

2, a first rock test piece 210 and a second rock test piece 210 are sandwiched between the base part 120 and the pressing part 130 of the joint surface test apparatus 100 having the above- A rock test piece 200 including a test piece 220 is installed. The first rock test piece 210 is supported by the support member 123 of the base 120 and the upper surface of the first rock test piece 210 is disposed so as to abut one end of the lower end of the pressurizing main body 131. The second rock test piece 220 is supported on one end of the upper surface of the base body portion 121 which is not opened and the upper surface of the second rock test piece 220 is disposed to abut on the plate member 133 of the pressing portion 130. The impermeable membrane 170 is provided to enclose the rock test piece 200. A waterproof tape is adhered between the impermeable film 170 and the base portion 120 and between the impermeable film 170 and the pressing portion 130. The displacement measuring unit 180 is installed to enclose the impermeable membrane 170 surrounding the rock test piece 200. Pressure is applied to the first and second rock test pieces 210 and 220 in the direction perpendicular to the joint surface JS of the rock test piece 200 through the pressure control of the pressure storage space SP of the chamber part 110, Respectively.

A method of measuring the hydraulic conductivity in the above-described state will be described. A liquid (for example, water) is injected into the pressing portion 130 through a liquid injector (not shown). At this time, the liquid passes through the upper test piece accommodating space (TTS), passes through the joint surface (JS) of the rock test piece (200), flows into the lower test piece accommodating space (BTS), and then the discharge hose And the like. Thereafter, the separate measuring equipment calculates the hydraulic conductivity of the rock test piece 200 to the joint surface JS using the liquid pressure and the liquid amount to be injected, and the liquid pressure and the liquid amount to be discharged. This hydraulic conductivity can be measured in the same manner as described above even after the shear displacement of the rock test piece 200 occurs.

Referring to FIG. 8, a method of shearing the rock surface of the rock test piece 200 will be described. A separate actuator device drives the load generating part 150 to generate a load. The load of the load generating unit 150 is transmitted to the load transmitting unit 160 and the load transmitted to the load transmitting unit 160 is transmitted to the pressing unit 130 via the upper plate member 143. The pressing portion 130 presses the rock test piece 200 by using the load of the load generating portion 150 to shear. The first rock test piece 210 moves downward by the pressurization of the pressing portion 130, and a predetermined lower portion is accommodated in the lower test piece receiving space (BTS). Also, the second rock test piece 210 is moved relative to the first rock test piece 220 to receive a predetermined upper portion in the upper test piece receiving space TTS. In this case, when the vertical displacement of the first and second rock test pieces 210 and 200 is measured, it is possible to measure very important results in the analysis of the joint repair behavior such as the expansion angle and the gap.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Rock shear surface shear test system
110: chamber part
120: Base portion
121: Base body part
BTS: Lower specimen accommodation space
BHP: Horizontal flow
BVP: Vertical flow
123: support member
125: spring member
130:
131: pressing body portion
TTS: Upper specimen receiving space
THP: horizontal flow
TVP: Vertical channel
133: plate member
135: elastic member
140: Support
141: Lower plate member
143: upper plate member
145: a plurality of guide rods
150:
160:
170: Impermeable membrane
180: displacement measuring unit
200: Rock test piece
210, 220: first and second rock test pieces

Claims (12)

A rock shear test apparatus for a rock test piece including a first rock test piece and a second rock test piece arranged to face each other along a joint surface formed in a longitudinal direction,
A base portion disposed and supported at a lower portion of the rock test piece; And
A pressing member including a pressing body portion having an opening at least a part of which is open, a plate member provided to cover an opening of the pressing body portion, and an elastic member fixed inside the pressing body portion and connected to and supported by the plate member. Comprising:
Wherein the pressurizing body portion is provided on an upper portion of the rock test piece and pressurizes and shears the first rock test piece to form an upper test piece receiving space so as to accommodate the second rock test piece relatively moving with the first rock test piece, Joint shear test apparatus. The method according to claim 1,
Wherein the base portion is formed in a symmetrical shape with the pressing portion, and the lower test piece receiving space is formed to accommodate the first rock test piece. 3. The method of claim 2,
The base unit includes:
A supporting member provided so as to cover an opened end of the base body portion, and a supporting member provided at a lower portion of the base body portion inside And a spring member fixed to the support member and connected to the support member. The method according to claim 1,
Wherein the elastic member is provided in the upper test piece receiving space. The method according to claim 1,
The pressing body portion
And a vertical flow passage vertically penetrating the inner ceiling surface forming the test piece receiving space and communicating with the horizontal flow path is formed. 6. The method of claim 5,
The pressing body portion
And a fluid injector connected to the horizontal flow path and the vertical flow path so as to allow fluid to flow therethrough for measuring hydraulic conductivity between the first and second rock test pieces. The method according to claim 1,
Wherein the pressing body portion is formed with a rod guide protruding from a central portion of the rod body so as to be sandwiched between the first and second rock test pieces. The method according to claim 1,
And a support portion provided for maintaining the horizontal position of the base portion and the pressing portion,
Wherein the support portion includes a lower plate member in which the base portion is disposed, an upper plate member in which the pressing portion is fitted, and a plurality of guide rods connecting the lower plate member and the upper plate member. 9. The method of claim 8,
A load generating unit for generating a load for moving the pressing unit in a downward direction; And
A load transfer unit provided between the load generating unit and the lower plate member for transmitting a load of the load generating unit to the lower plate member;
Further comprising: a rock shear surface shear testing device. The method according to claim 1,
Further comprising an impermeable membrane provided to enclose the rock test piece. The method according to claim 1,
Further comprising a displacement measuring unit provided to surround the rock test piece and measuring a radial displacement of the rock test piece. The method according to claim 1,
Further comprising a chamber portion for receiving the rock test piece, the base portion, and the pressing portion,
Wherein the chamber portion has a pressure storage space capable of pressure adjustment so as to provide a pressure in a direction perpendicular to a joint surface of the rock test piece.

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