Detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test

Abstract

The utility model relates to the technical field of rock mechanical property tests, in particular to a rock mass vertical and horizontal displacement detection mechanism in a rock mass shear test, which comprises a to-be-detected block, an insertion rod and a measurement assembly, a rock mass sample is composed of a plurality of rock blocks, a shear seam is reserved between every two adjacent rock blocks, a mounting hole is pre-formed in the upper part of the rock mass sample, and the insertion rod is inserted into the mounting hole. The inserting rod penetrates through the to-be-measured block and is inserted into the mounting hole, the inserting rod is fixedly connected with the to-be-measured block, the to-be-measured block is mounted on the rock mass sample through the inserting rod and is arranged close to the shear seam, and the measuring assembly is used for measuring the vertical and horizontal displacement of the to-be-measured block; according to the rock mass vertical and horizontal displacement detection mechanism in the rock mass shear test, direct contact between the measurement end of the measurement assembly and a rock mass sample is avoided in the process that the rock mass sample is subjected to shear force by using a to-be-measured block and an insertion rod; and the horizontal and vertical displacement of the rock mass sample is measured by measuring the displacement data of the to-be-measured block, so that the accuracy of the rock mass displacement measurement data is improved.

Description

Technical Field

[0001] The present application relates to the technical field of rock mechanical property testing, and in particular to a detection mechanism for vertical and horizontal displacement of a rock mass in a rock mass shear test. Background Art

[0002] As an important component of the earth's crust, rocks are widely present in various natural environments and engineering structures. Their mechanical behavior and stability have an important impact on engineering construction, resource development, and natural disaster prevention and control. Therefore, it is necessary to conduct in-depth research on the mechanical properties of rocks and the engineering stability of rock masses. In the direct shear test of the rock structure surface, it is necessary to detect the horizontal and vertical displacements of the rock samples.

[0003] In the prior art, the detection device for the vertical and horizontal displacement of the rock mass in the rock shear test includes a shear box and a displacement meter; the shear box is the main container for placing the rock mass to be tested, and the displacement meter includes a vertical displacement meter and a horizontal displacement meter, the displacement meter is fixed to the outside of the shear box by screws or other fasteners, and the measuring end of the displacement meter is in close contact with the rock mass, and the shear box is connected to the shear device of the rock mass; during the rock shear test, the rock mass to be tested is first placed in the shear box, the displacement meter is fixed to ensure that its measuring end is in good contact with the rock mass, and then a predetermined shear force is applied to the rock mass through the shear device, and the rock mass is displaced under the action of the shear force, and the displacement meter measures and records these displacement data in real time.

[0004] Regarding the above-mentioned related technologies, since the displacement meter is fixed to the outside of the shear box by screws or other fasteners, when the shear box and the rock sample are subjected to strong shear force, the movement or deformation of the rock sample will cause the measuring end of the displacement meter to have loose contact with the rock structure surface, affecting the accuracy of the rock displacement measurement data. Utility Model Content

[0005] In order to improve the accuracy of rock mass displacement measurement data, the present application provides a detection mechanism for the vertical and horizontal displacement of a rock mass in a rock mass shear test.

[0006] The present application provides a detection mechanism for the vertical and horizontal displacement of rock mass in a rock mass shear test using the following technical solution:

[0007] A detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test, comprising a rock mass sample, a test block, a plug rod and a measuring assembly;

[0008] The rock mass sample is composed of a plurality of rock blocks, and a shear joint is left between two adjacent rock blocks;

[0009] A mounting hole is preset on the upper part of the rock sample, the insertion rod passes through the substitute measurement block and is inserted into the mounting hole, and the insertion rod is fixedly connected to the substitute measurement block;

[0010] The substitute measuring block is installed on the rock sample through the insertion rod, and the substitute measuring block is arranged close to the shear joint;

[0011] The measuring assembly is used to measure the vertical and horizontal displacements of the measuring block.

[0012] By adopting the above technical scheme, first, the plug rod is inserted into the installation hole, and the substitute test block is placed close to one side of the shear joint to ensure a stable connection between the rock sample, the substitute test block and the plug rod. Then, before the test starts, the initial displacement measurement is performed by the measuring component, and the initial position of the substitute test block is recorded. Then the shear test is started, and horizontal and vertical shear forces are applied to the rock sample by horizontal and vertical hydraulic jacks to cause shear deformation of the rock sample. During the deformation of the rock sample, the substitute test block is displaced as the rock sample is deformed. The measuring component continuously measures the displacement change of the substitute test block, and records the vertical and horizontal displacement data in real time for subsequent analysis and calculation of the mechanical properties of the rock mass. The detection mechanism for the vertical and horizontal displacement of the rock mass in the rock shear test is convenient for avoiding direct contact between the measuring end of the measuring component and the rock sample when the rock sample is subjected to shear force by using the substitute test block and the plug rod, and the horizontal and vertical displacements of the rock sample are measured by measuring the displacement data of the substitute test block, which is conducive to improving the accuracy of the rock displacement measurement data.

[0013] Preferably, the measuring assembly comprises a first dial indicator, the first dial indicator is vertically arranged, and a probe of the first dial indicator is in contact with the top wall of the substitute measuring block.

[0014] By adopting the above technical solution, the first dial indicator is vertically arranged, and its probe is in contact with the top wall of the test block, so as to accurately measure the displacement change of the test block in the vertical direction, thereby realizing the accurate measurement of the displacement change data of the rock sample in the vertical direction in the rock shear test. At the same time, the structure of the dial indicator is stable and not easily affected by external interference, so as to ensure the accuracy and reliability of the measurement results.

[0015] Preferably, the measuring assembly further comprises a second dial indicator, the second dial indicator is arranged horizontally, and a probe of the second dial indicator is in contact with the side wall of the substitute measuring block.

[0016] By adopting the above technical solution, the second dial indicator is set horizontally, and its probe is in contact with the side wall of the test block, which can accurately measure the displacement change of the test block in the horizontal direction, thereby realizing the accurate measurement of the displacement change data of the rock sample in the horizontal direction in the rock shear test. At the same time, the second dial indicator can display the change of the vertical displacement of the test block in real time, so that researchers can intuitively understand the vertical deformation of the rock in the shear test.

[0017] Preferably, it further comprises a support assembly, wherein the support assembly comprises a mounting platform, a support frame and two electromagnetic blocks;

[0018] The mounting platform is arranged close to the rock sample;

[0019] The two electromagnetic blocks are both magnetically attracted to the mounting platform, and the two electromagnetic blocks are respectively arranged close to the first dial indicator and the second dial indicator;

[0020] The support frame is used to install, fix and support the first dial indicator and the second dial indicator.

[0021] By adopting the above technical solution, the set mounting table provides a stable installation foundation for the measuring component, so that it can be stably set close to the rock sample, and the support frame is used to install, fix and support the first dial indicator and the second dial indicator to ensure that they will not shake or move during use, which is beneficial to improve the stability of the measurement; the introduction of the electromagnetic block enables the first dial indicator and the second dial indicator to be more accurately positioned at the required measurement position. At the same time, the magnetic connection between the electromagnetic block and the mounting table makes the installation and disassembly of the dial indicator more convenient, which is convenient for researchers to quickly adjust the position of the dial indicator according to the test needs, which is beneficial to improve the flexibility and efficiency of the shear test; the set support component is suitable for different types of dial indicators and rock samples. Whether in indoor tests or field applications, different measurement needs can be adapted by adjusting the structure and configuration of the support component.

[0022] Preferably, the support frame includes a first support frame and a second support frame;

[0023] One end of the first bracket is connected to the mounting platform through the electromagnetic block, and the other end is detachably connected to the first dial indicator;

[0024] One end of the second bracket is connected to the mounting platform through the electromagnetic block, and the other end is detachably connected to the second dial indicator.

[0025] By adopting the above technical solution, the first bracket is specifically used to support the first dial indicator to ensure that it works stably in the vertical direction without being disturbed by the outside world; the second bracket is used to support the second dial indicator to keep it stable in the horizontal direction. The targeted support setting can maximize the measurement accuracy and stability.

[0026] Preferably, the first bracket includes a first connecting section and a first supporting section;

[0027] One end of the first connecting section is rotatably connected to the electromagnetic block close to the first dial gauge, and the other end is rotatably connected to the first supporting section, and the end of the first connecting section close to the first supporting section can be rotated away from or close to the rock sample;

[0028] One end of the first supporting section away from the first connecting section is rotatably connected to the probe of the first dial indicator, and the first supporting section can drive the first dial indicator to move up and down.

[0029] By adopting the above technical solution, one end of the first connecting section is rotatably connected to the electromagnetic block, and the other end is rotatably connected to the first supporting section. This allows the first bracket to have a certain adjustment flexibility in the vertical direction. The first supporting section is rotatably connected to the probe of the first dial indicator at one end away from the first connecting section, which can stably support the dial indicator and ensure its measurement accuracy in the vertical direction. At the same time, the setting of the first supporting section allows the dial indicator to move up and down, which is conducive to further improving the flexibility and accuracy of measurement.

[0030] Preferably, the second bracket includes a second connecting section and a second supporting section;

[0031] One end of the second connecting section is rotatably connected to the electromagnetic block near the second dial indicator, and the other end is rotatably connected to the second supporting section, and the second connecting section near the second supporting section can rotate up and down;

[0032] One end of the second supporting section away from the second connecting section is rotatably connected to the probe of the second dial indicator, and the second supporting section can drive the second dial indicator to move left and right.

[0033] By adopting the above technical solution, the rotational connection between the second connecting section and the electromagnetic block and the rotational connection between the second connecting section and the second supporting section make the second bracket have greater adjustment flexibility in the horizontal direction, which is convenient for researchers to adjust the position and angle of the second dial indicator as needed to adapt to different test conditions and measurement requirements. The second supporting section is rotatably connected to the probe of the second dial indicator, which can stably support the dial indicator and ensure its measurement accuracy in the horizontal direction.

[0034] Preferably, the substitute measurement block, the insertion rod, the measurement assembly and the support assembly are each provided with two groups, and the two groups of the substitute measurement block, the insertion rod, the measurement assembly and the support assembly are symmetrically distributed with respect to the rock sample.

[0035] By adopting the above technical scheme, two sets of symmetrically arranged test blocks, plungers, measuring assemblies and support assemblies can measure the displacement of rock samples from two different positions at the same time, which is convenient for researchers to obtain more and more comprehensive data and improve the accuracy and reliability of displacement measurement data. In addition, the two sets of measuring devices can verify the accuracy of the measurement results with each other, providing more comprehensive and accurate data support for analyzing the mechanical properties of the rock mass.

[0036] In summary, the present application includes at least one of the following beneficial technical effects:

[0037] 1. The detection mechanism for the vertical and horizontal displacement of the rock mass in the rock shear test is convenient for avoiding direct contact between the measuring end of the measuring component and the rock mass sample when the rock mass sample is subjected to shear force by using the substitute measuring block and the plug rod, and the horizontal and vertical displacement of the rock mass sample is measured by measuring the displacement data of the substitute measuring block, which is conducive to improving the accuracy of the rock mass displacement measurement data.

[0038] 2. The mounting table provides a stable installation foundation for the measuring component, so that it can be stably set close to the rock sample. The support frame is used to install, fix and support the first dial indicator and the second dial indicator to ensure that they will not shake or move during use, which is beneficial to improve the stability of the measurement. The introduction of the electromagnetic block enables the first dial indicator and the second dial indicator to be more accurately positioned at the required measurement position. At the same time, the magnetic connection between the electromagnetic block and the mounting table makes the installation and disassembly of the dial indicator more convenient, which is convenient for researchers to quickly adjust the position of the dial indicator according to the test needs, which is beneficial to improve the flexibility and efficiency of the shear test. The support component is suitable for different types of dial indicators and rock samples. Whether in indoor tests or field applications, different measurement needs can be adapted by adjusting the structure and configuration of the support component.

[0039] 3. Two sets of symmetrically arranged test blocks, plungers, measuring components and support components can measure the displacement of rock samples from two different positions at the same time, which is convenient for researchers to obtain more and more comprehensive data and improve the accuracy and reliability of displacement measurement data. The two sets of measuring devices can verify the accuracy of the measurement results with each other, providing more comprehensive and accurate data support for analyzing the mechanical properties of rock mass. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of a detection mechanism for vertical and horizontal displacement of a rock mass in a rock mass shear test according to an embodiment of the present application.

[0041] Explanation of the accompanying reference numerals: 1. rock sample; 11. rock block; 12. shear joint; 13. mounting hole; 2. measuring block; 3. insertion rod; 4. measuring assembly; 41. first dial indicator; 42. second dial indicator; 5. supporting assembly; 51. mounting table; 511. horizontal portion; 512. vertical portion; 52. electromagnetic block; 53. supporting frame; 531. first bracket; 5311. first connecting section; 5312. first supporting section; 532. second bracket; 5321. second connecting section; 5322. second supporting section. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 This application is described in further detail.

[0043] The embodiment of the present application discloses a detection mechanism for the vertical and horizontal displacement of a rock mass in a rock mass shear test.

[0044] Reference Figure 1 A detection mechanism for vertical and horizontal displacement of rock mass in a rock shear test includes a rock mass sample 1, a test block 2, a plug rod 3, a measuring assembly 4 and a supporting assembly 5.

[0045] Reference Figure 1 The rock sample 1 is cast by a plurality of rock blocks 11. In the present embodiment, four rock blocks 11 are provided, and a shear seam 12 is provided between each two adjacent rock blocks 11. A cardboard is provided between the shear seams 12. A mounting hole 13 is provided on the rock block 11 located in the upper part. The mounting holes 13 are distributed along the length direction of the rock sample 1, and the mounting holes 13 are arranged near the shear seams 12. A plug rod 3 is provided on the substitute measuring block 2. One end of the plug rod 3 passes through the substitute measuring block 2 and is welded to the substitute measuring block 2, and the other end is inserted into the mounting hole 13 and stably connected to the rock sample 1. The substitute measuring block 2 is installed on the rock sample 1 through the plug rod 3, and the substitute measuring block 2 is arranged near the shear seam 12 and is distributed opposite to the mounting hole 13. The measuring component 4 is used to measure the vertical and horizontal displacements of the substitute measuring block 2.

[0046] Reference Figure 1 The measuring assembly 4 includes a first percentage meter 41 and a second percentage meter 42. The first percentage meter 41 is vertically arranged and the probe of the first percentage meter 41 is in contact with the top wall of the substitute measuring block 2. The second percentage meter is horizontally arranged and the probe of the second percentage meter 42 is in contact with a side wall of the substitute measuring block 2. In the present application, the first percentage meter 41 and the second percentage meter 42 are both arranged parallel to the rock sample 1.

[0047] Reference Figure 1 , the support assembly 5 includes a mounting platform 51, a support frame 53 and two electromagnetic blocks 52;

[0048] Set close to the rock sample 1, the mounting platform 51 includes an integrally arranged horizontal portion 511 and two vertical portions 512, the two vertical portions 512 are arranged in parallel and installed on the ground, the horizontal portion 511 is mounted on the vertical portions 512 and welded to the two vertical portions 512; the two electromagnetic blocks 52 are magnetically attracted to the top wall of the horizontal portion 511, and the two electromagnetic blocks 52 are respectively arranged close to the first dial indicator 41 and the second dial indicator 42, the support frame 53 is used to install, fix and support the first dial indicator 41 and the second dial indicator 42, the support frame 53 includes a first bracket 531 and a second bracket 532, one end of the first bracket 531 is connected to the mounting platform 51 through the electromagnetic block 52, and the other end is detachably connected to the first dial indicator 41, one end of the second bracket 532 is connected to the mounting platform 51 through the electromagnetic block 52, and the other end is detachably connected to the second dial indicator 42.

[0049] Reference Figure 1 The first bracket 531 includes a first connecting section 5311 and a first supporting section 5312. One end of the first connecting section 5311 is rotatably connected to the electromagnetic block 52 near the first dial indicator 41, and the other end is rotatably connected to the first supporting section 5312. The end of the first connecting section 5311 near the first supporting section 5312 can be rotated away from or close to the rock sample 1 to achieve forward and backward adjustment of the first dial indicator 41. The end of the first supporting section 5312 away from the first connecting section 5311 is rotatably connected to the probe of the first dial indicator 41. The first supporting section 5312 can drive the first dial indicator 41 to move up and down to adapt to the displacement change of the substitute measuring block 2 in the vertical direction. The second bracket 532 includes a second connecting section 5321 and a second supporting section 5322. One end of the second connecting section 5321 is rotatably connected to the electromagnetic block 52 near the second dial indicator 42. The other end is rotatably connected to the second supporting section 5322, and the second connecting section 5321 can be rotated up and down at one end close to the second supporting section 5322 to realize the up and down adjustment of the second dial indicator 42, and the second supporting section 5322 is rotatably connected to the probe of the second dial indicator 42 at one end away from the second connecting section 5321, and the second supporting section 5322 can drive the second dial indicator 42 to move left and right to adapt to the displacement change of the substitute measuring block 2 in the vertical direction; in addition, in order to facilitate researchers to obtain more and more comprehensive data, improve the accuracy and reliability of displacement measurement data, and provide more comprehensive and accurate data support for analyzing the mechanical properties of the rock mass, in this application, two groups of substitute measuring blocks 2, plug rods 3, measuring components 4 and support components 5 are provided, and the two groups of substitute measuring blocks 2, plug rods 3, measuring components 4 and support components 5 are symmetrically distributed on both sides of the rock sample 1.

[0050] The implementation principle of the detection mechanism of the vertical and horizontal displacement of the rock in a rock shear test in an embodiment of the present application is as follows: first, the insertion rod 3 is inserted into the mounting hole 13, and the substitute test block 2 is placed close to one side of the shear joint 12 to ensure a stable connection between the rock sample 1, the substitute test block 2 and the insertion rod 3. Then, before the test starts, the initial displacement measurement is performed by the measuring component 4, and the initial position of the substitute test block 2 is recorded. Then, the shear test is started, and horizontal and vertical shear forces are applied to the rock sample 1 by horizontal and vertical hydraulic jacks to cause shear deformation of the rock sample 1. During the deformation of the rock sample 1, the substitute test block 2 is displaced as the rock sample 1 is deformed. The measuring component 4 continuously measures the displacement change of the substitute test block 2, and records the displacement data in the vertical and horizontal directions in real time for subsequent analysis and calculation of the mechanical properties of the rock.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test, characterized in that: It comprises a rock sample (1), a test block (2), an insertion rod (3) and a measuring assembly (4); The rock mass sample (1) is composed of a plurality of rock blocks (11), and a shear joint (12) is provided between two adjacent rock blocks (11); The upper part of the rock sample (1) is preset with a mounting hole (13), the insertion rod (3) passes through the substitute measurement block (2) and is inserted into the mounting hole (13), and the insertion rod (3) is fixedly connected to the substitute measurement block (2); The substitute measurement block (2) is installed on the rock sample (1) through the insertion rod (3), and the substitute measurement block (2) is arranged close to the shear joint (12); The measuring component (4) is used to measure the vertical and horizontal displacements of the measuring block (2).

2. The detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test according to claim 1, characterized in that: The measuring assembly (4) comprises a first dial gauge (41), the first dial gauge (41) is arranged vertically, and a probe of the first dial gauge (41) is in contact with the top wall of the measuring block (2).

3. The detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test according to claim 2, characterized in that: The measuring assembly (4) further comprises a second dial gauge (42), the second dial gauge (42) being arranged horizontally, and a probe of the second dial gauge (42) being in contact with the side wall of the substitute measuring block (2).

4. The detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test according to claim 3, characterized in that: It also includes a support assembly (5), wherein the support assembly (5) includes a mounting platform (51), a support frame (53) and two electromagnetic blocks (52); The mounting platform (51) is arranged close to the rock sample (1); The two electromagnetic blocks (52) are both magnetically attracted to the mounting platform (51), and the two electromagnetic blocks (52) are respectively arranged close to the first dial gauge (41) and the second dial gauge (42); The support frame (53) is used to install, fix and support the first dial gauge (41) and the second dial gauge (42).

5. The detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test according to claim 4, characterized in that: The support frame (53) comprises a first support frame (531) and a second support frame (532); One end of the first bracket (531) is connected to the mounting platform (51) via the electromagnetic block (52), and the other end is detachably connected to the first dial indicator (41); One end of the second bracket (532) is connected to the mounting platform (51) via the electromagnetic block (52), and the other end is detachably connected to the second dial indicator (42).

6. The detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test according to claim 5, characterized in that: The first bracket (531) comprises a first connecting section (5311) and a first supporting section (5312); One end of the first connecting section (5311) is rotatably connected to the electromagnetic block (52) near the first dial indicator (41), and the other end is rotatably connected to the first supporting section (5312), and the end of the first connecting section (5311) near the first supporting section (5312) can be rotated away from or close to the rock sample (1); The first supporting section (5312) is rotatably connected to the probe of the first dial indicator (41) at one end away from the first connecting section (5311), and the first supporting section (5312) can drive the first dial indicator (41) to move up and down.

7. The detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test according to claim 5, characterized in that: The second bracket (532) includes a second connecting section (5321) and a second supporting section (5322); One end of the second connecting section (5321) is rotatably connected to the electromagnetic block (52) near the second dial indicator (42), and the other end is rotatably connected to the second supporting section (5322), and the end of the second connecting section (5321) near the second supporting section (5322) can rotate up and down; The second supporting section (5322) is rotatably connected to the probe of the second dial indicator (42) at one end away from the second connecting section (5321), and the second supporting section (5322) can drive the second dial indicator (42) to move left and right.

8. The detection mechanism for vertical and horizontal displacement of rock mass in rock mass shear test according to claim 5, characterized in that: The substitute measuring block (2), the insert rod (3), the measuring assembly (4) and the supporting assembly (5) are each provided in two groups, and the two groups of the substitute measuring block (2), the insert rod (3), the measuring assembly (4) and the supporting assembly (5) are symmetrically distributed with respect to the rock sample (1).

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