Variable stiffness lateral confinement type rock-soil mechanical test device and method

Abstract

The invention discloses a variable-stiffness lateral confinement type rock-soil mechanical test device and method.The variable-stiffness lateral confinement type rock-soil mechanical test device adopts the following technical scheme that the variable-stiffness lateral confinement type rock-soil mechanical test device comprises a base, a containing groove is formed in the top face of the base, a constraint body is arranged in the containing groove, and the outer wall of the constraint body is sleeved with a hoop cylinder; a plurality of instrument grooves are formed in the inner wall of the constraint body, and the interiors of the instrument grooves are connected with pressure sensors and displacement sensors respectively; the first supporting frame is connected to the top face of the base, an extrusion block is arranged on the bottom face of the first supporting frame, the cleaning assembly is arranged on the top face of the base and comprises a second supporting frame, the second supporting frame is connected to the top face of the base, a moving block is arranged on the inner bottom face of the second supporting frame, and a scraping plate is connected to the bottom face of the moving block. According to the readings of the pressure sensor and the displacement sensor, the stress and deformation conditions of the four sides of the rock medium sample are obtained, and the rock medium mechanics experiment is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geotechnical medium experiment, in particular to a variable stiffness side limit type geotechnical mechanics test device and method. BACKGROUND

[0002] Geotechnical mechanics parameters are the key to developing geotechnical mechanics theory and advancing geotechnical engineering technology. Reasonable and efficient determination of geotechnical mechanics parameters requires reliable testing devices and testing methods. Therefore, continuous development of new testing technologies according to actual engineering needs can promote the development of geotechnical mechanics and engineering. In the field of geotechnical mechanics testing methods and testing technologies, the most commonly used testing device is a triaxial testing device, including conventional triaxial and true triaxial. In conventional triaxial tests, the stresses in the two horizontal directions are independently controlled and kept equal.

[0003] For example, the Chinese patent with publication number CN112595582A proposes a variable stiffness side limit type geotechnical mechanics test device and method. The device does not independently apply active force in the two horizontal directions, but uses axial load to generate lateral deformation constraints on the sample to generate lateral constraint reaction force. This device can complete various geotechnical medium mechanics tests, has low cost and simple structure, and can provide lateral stress by adjusting the stiffness of the constraint passively, achieve true triaxial stress state of geotechnical medium, and also can carry out uniaxial compression test, conventional triaxial compression test and true triaxial compression test, and has high utilization rate. The top and bottom of the hoop cylinder are fixed with an upper pressure cover and a lower bottom plate, respectively, and the inner wall of the hoop cylinder is uniformly arranged with four constraint bodies. The outer side wall of each constraint body is in close contact with the inner wall of the hoop cylinder, and a pressure sensor and a displacement sensor are arranged in the interior of each constraint body. However, in this scheme, when the geotechnical medium in the mechanics test device is crushed, the operator needs to manually clean up, and the dust particles adhered to the inner wall of the constraint body are not easy to clean up, which may affect the accuracy of subsequent geotechnical test data. Therefore, we propose a variable stiffness side limit type geotechnical mechanics test device. SUMMARY

[0004] In view of the problems mentioned in the background art, the purpose of the present application is to provide a variable stiffness side limit type geotechnical mechanics test device and method to solve the problems mentioned in the background art.

[0005] The above technical purpose of the present application is achieved by the following technical scheme:

[0006] The variable rigidity side limit type rock-soil mechanics test device comprises a base, the top surface of the base is provided with a placing groove, the inside of the placing groove is provided with a constraint body, the outer wall of the constraint body is provided with a hoop cylinder, the inner wall of the constraint body is provided with a plurality of instrument grooves, and the inside of the instrument grooves is respectively connected with a pressure sensor and a displacement sensor; a first support frame is connected to the top surface of the base, and the bottom surface of the first support frame is provided with a pressing block; a cleaning assembly is arranged on the top surface of the base and used for cleaning the inner wall of the constraint body, the cleaning assembly comprises a second support frame connected to the top surface of the base, the inside bottom surface of the second support frame is provided with a moving block, the bottom surface of the moving block is connected with a scraper, and the outer wall of the moving block is provided with a brush.

[0007] By adopting the above technical scheme, the constraint body is arranged, in use, the selected rock medium sample is prepared into a square shape, and the rock medium sample is leveled and polished, so that the four side surfaces of the rock medium sample can be attached to the inner wall of the constraint body, the pressing block is used to apply pressure to the rock medium, until the rock medium sample is damaged, the stress and deformation of the four side surfaces of the rock medium sample are obtained through the readings of the internal pressure sensor and the displacement sensor of the constraint body, the rock medium mechanics experiment is completed, after the test is completed, the rock medium in the constraint body is cleaned by the operator, the moving block is pushed by the operator, the inner wall of the constraint body is cleaned by the scraper, and the inner wall of the constraint body is cleaned by the brush, so that the rock medium powder particles remaining on the inner wall of the constraint body are avoided, and the purpose of cleaning the inside of the constraint body is achieved.

[0008] Preferably, the cleaning assembly further comprises a plurality of mounting grooves, the mounting grooves are arranged on the outer wall surface of the moving block, the inside of the mounting grooves is connected with a vibration motor, and the vibration end of the vibration motor is connected to the inner wall of the brush.

[0009] By adopting the above technical scheme, the first electric push rod is arranged, in use, after the test is completed, the constraint body is placed at the bottom position of the second support frame by the operator, the moving block is pushed by the first electric push rod, a driving force is provided for the movement of the moving block, the vibration motor is vibrated, the brush is vibrated, and the cleaning effect of the inner wall of the constraint body is improved.

[0010] Preferably, the top surface of the first support frame is connected with an air cylinder, and one end of the telescopic shaft of the air cylinder is connected to the top surface of the pressing block.

[0011] By adopting the technical scheme, the cylinder is arranged, in use, the extrusion block is pushed to move by the cylinder extension shaft, the extrusion block applies pressure to the rock medium inside the constraint body, and the practicability is improved.

[0012] Preferably, the top surface of the base is connected with a mounting frame, a moving groove is arranged on one side of the inside of the mounting frame, a lead screw is rotatably connected in the moving groove, a sliding block is threadedly connected to the outer wall of the lead screw, a connecting block is connected to one side of the sliding block, a fixing block is arranged on one side of the connecting block, and the fixing block is connected to one side of the constraint body.

[0013] By adopting the technical scheme, after the test is completed, the operating personnel can rotate the lead screw, the connecting block is moved by the rotation of the lead screw, the fixing block is moved by the movement of the connecting block, the constraint body can be quickly separated from the inside of the placing groove, the operating personnel can clean the inner wall of the constraint body, and the working efficiency is improved.

[0014] Preferably, an adjusting groove is arranged on one side of the connecting block, a second electric push rod is connected to the inside of the adjusting groove, one end of the extension shaft of the second electric push rod is connected to one side of the fixing block, a servo motor is connected to the top surface of the mounting frame, and one end of the driving shaft of the servo motor is connected to one end of the lead screw.

[0015] By adopting the technical scheme, in use, the fixing block is moved by the movement of the extension shaft of the second electric push rod, the constraint body can be moved to a cleaning position by the horizontal movement of the fixing block, the cleaning is facilitated, the lead screw is rotated by the driving shaft of the servo motor, and the purpose of providing driving force for the rotation of the lead screw is achieved.

[0016] Preferably, a clamping groove is arranged on the top surface of the hoop cylinder, a baffle is movably sleeved in the clamping groove, positioning blocks are respectively connected to the left and right sides of the hoop cylinder, fixed bolts are threadedly connected to the inside of the positioning blocks, and two positioning grooves are arranged on the top surface of the base.

[0017] By adopting the technical scheme, in application, the operating personnel rotates the fixed bolts, disassembles the fixed bolts, removes the fixation of the positioning blocks on the hoop cylinder, and facilitates the operating personnel to assemble or disassemble the hoop cylinder.

[0018] Preferably, a collecting groove is arranged on the top surface of the base, cleaning grooves are respectively arranged on one side of the inside of the collecting groove and the placing groove, a third electric push rod is connected to the inside of the cleaning groove, and a cleaning plate is connected to one end of the extension shaft of the third electric push rod.

[0019] By adopting the technical scheme, when cleaning, the operator cleans the large rock medium in the placing groove, then moves the cleaning plate through the third electric push rod telescopic shaft, and cleans the collected powder in the collecting groove and the placing groove through the cleaning plate, thereby improving the cleaning effect.

[0020] A variable stiffness side limit type geotechnical mechanics test device usage method has the following specific steps:

[0021] S100: The operator prepares the selected rock medium sample into a square shape, and flattens and polishes the rock medium sample, so that the four sides of the rock medium sample can be attached to the inner wall of the constraint body. The operator pushes the extrusion block downward to apply pressure to the rock medium in the constraint body until the rock medium sample is damaged. The readings of the pressure sensor and displacement sensor inside the constraint body are obtained to obtain the stress and deformation of the four sides of the rock medium sample, and the rock medium mechanics experiment is completed.

[0022] S200: After the test is completed, the fixed bolt is rotated, the hoop cylinder is disassembled, and the constraint body is released. At this time, the operator can clean the broken rock medium in the placing groove, and simultaneously starts the third electric push rod to process the powder at the bottom of the placing groove to achieve the processing of the residual rock medium in the placing groove.

[0023] S300: The servo motor is started to drive the screw rod to rotate, so that the sliding block moves vertically upward, so that the constraint body is separated from the placing groove. Then the second electric push rod is started to drive the constraint body to move in the direction of the collecting groove, and moves above the collecting groove. Then the first electric push rod is started to drive the moving block to move downward, and the scraping block and the brush clean the inner wall of the constraint body to achieve the processing of the inner wall of the constraint body.

[0024] S400: During the movement of the moving block, the vibration motor is started to drive the brush to vibrate, so as to accelerate the cleaning of the constraint body. After cleaning is completed, the third electric push rod is started to drive the cleaning plate to clean the dust inside the collecting groove.

[0025] In summary, the present application mainly has the following advantages:

[0026] By setting the constraint body, in use, the work personnel prepares the selected rock medium sample into a square, and levels and polishes the rock medium sample, so that the four sides of the rock medium sample can be attached to the inner wall of the constraint body respectively, the rock medium is pressed by the extrusion block until the rock medium sample is damaged, the stress and deformation of the four sides of the rock medium sample are obtained through the readings of the internal pressure sensor and the displacement sensor of the constraint body, the rock medium mechanical experiment is completed, after the test is completed, the work personnel cleans the broken rock medium in the constraint body, the work personnel pushes the moving block, the inner wall of the constraint body is cleaned by the scraper, and the inner wall of the constraint body is cleaned by the brush, so that the rock medium powder particles are avoided to be left on the inner wall of the constraint body, the purpose of cleaning the inside of the constraint body is achieved, the first electric push rod is arranged, in use, after the test is completed, the work personnel can place the constraint body at the bottom position of the second support frame, the moving block is driven to move by the first electric push rod extension shaft, the cleaning effect of the inner wall of the constraint body is improved by the vibration of the brush generated by the vibration motor.

[0027] The cylinder is arranged, in use, the extrusion block is driven to move by the cylinder extension shaft, the rock medium in the constraint body is pressed by the extrusion block, the practicability is improved, the screw rod is arranged, after the test is completed, the work personnel can rotate the screw rod, the connecting block is driven to move by the rotation of the screw rod, the fixed block is driven to move by the movement of the connecting block, so that the constraint body can be quickly separated from the placing groove, the work personnel can clean the inner wall of the constraint body, and the working efficiency is improved.

[0028] The fixing bolt is arranged, in application, the work personnel rotates the fixing bolt, disassembles the fixing bolt, and removes the fixing of the positioning block on the hoop cylinder, so that the work personnel can install or disassemble the hoop cylinder, the third electric push rod is arranged, when cleaning, after the work personnel cleans the large rock medium in the placing groove, the cleaning plate is driven to move by the third electric push rod extension shaft, the collected powder in the collecting groove and the placing groove is cleaned by the cleaning plate, and the cleaning effect is improved. ACCURACY

[0029] Figure 1 It is a three-dimensional structure schematic diagram of the application;

[0030] Figure 2 It is a first support frame sectional view schematic diagram of the application;

[0031] Figure 3 It is a cleaning groove structure schematic diagram of the application;

[0032] Figure 4 It is a second support frame structure schematic diagram of the application;

[0033] Figure 5is a second support frame sectional view schematic diagram of the present application;

[0034] Figure 6 is a mounting frame sectional view schematic diagram of the present application.

[0035] Label: 1, base; 2, placing groove; 3, constraint body; 4, hoop cylinder; 5, first support frame; 6, extrusion block; 7, second support frame; 8, moving block; 9, scraper; 10, brush; 11, mounting groove; 12, vibration motor; 13, pushing groove; 14, first electric push rod; 15, air cylinder; 16, mounting frame; 17, moving groove; 18, lead screw; 19, sliding block; 20, connecting block; 21, fixed block; 22, adjusting groove; 23, second electric push rod; 24, servo motor; 25, instrument groove; 26, collecting groove; 27, cleaning groove; 28, clamping groove; 29, baffle; 30, positioning block; 31, fixed bolt; 32, positioning groove; 33, third electric push rod; 34, cleaning plate. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] Embodiment one

[0038] Reference Figures 1-6The utility model provides a kind of variable stiffness side limit geotechnical mechanics test device and method, including base 1, the top surface of base 1 is set with placing groove 2, the inside of placing groove 2 is provided with constraint body 3, the outer wall of constraint body 3 is sleeved with hoop 4, the inner wall of constraint body 3 is set with multiple instrument grooves 25, the inside of instrument groove 25 is respectively connected with pressure sensor and displacement sensor, the top surface of base 1 is connected with first support frame 5, the bottom surface of first support frame 5 is provided with extrusion block 6, cleaning assembly is set on the top surface of base 1, for cleaning the inner wall of constraint body 3, cleaning assembly includes second support frame 7, second support frame 7 is connected on the top surface of base 1, the inside bottom surface of second support frame 7 is provided with moving block 8, the bottom surface of moving block 8 is connected with scraper 9, the outer wall of moving block 8 is provided with brush 10, by setting constraint body 3, when using, operating personnel selects the rock medium sample and prepares into square, and rock medium sample is leveled, polished, so that four sides of rock medium sample can be respectively adhered to the inner wall of constraint body 3, by extrusion block 6, pressure is applied to rock medium, until rock medium sample is damaged, by the reading of pressure sensor and displacement sensor in constraint body 3, the stress and deformation of four sides of rock medium sample are obtained, rock medium mechanics experiment is completed, after testing, operating personnel cleans the broken rock medium in constraint body 3, operating personnel pushes moving block 8, and the inner wall of constraint body 3 is cleaned by scraper 9, and the inner wall of constraint body 3 is cleaned by cooperating with brush 10, to avoid that rock medium powder particles are left on the inner wall of constraint body 3, to achieve the purpose of cleaning the inside of constraint body 3, cleaning assembly further includes multiple mounting grooves 11, multiple mounting grooves 11 are respectively set on the outer wall surface of moving block 8, vibration motor 12 is connected in the inside of mounting groove 11, the vibration end of vibration motor 12 is connected to the inner wall of brush 10, the top surface of second support frame 7 is set with push groove 13, first electric push rod 14 is connected in the inside of push groove 13, and the telescopic shaft one end of first electric push rod 14 is connected to the top surface of moving block 8, by setting first electric push rod 14, when using, after testing, operating personnel can place constraint body 3 at the bottom position of second support frame 7, moving block 8 is pushed by the telescopic shaft of first electric push rod 14, to provide driving force for moving block 8, vibration is generated by vibration motor 12, so that brush 10 is vibrated, and the cleaning effect of the inner wall of constraint body 3 is improved.

[0039] Refer to Figures 1-6The top surface of the first support frame 5 is connected with a gas cylinder 15, one end of the telescopic shaft of the gas cylinder 15 is connected to the top surface of the extrusion block 6, by arranging the gas cylinder 15, in use, the extrusion block 6 is moved by the telescopic shaft of the gas cylinder 15, so that the extrusion block 6 exerts pressure on the rock medium inside the constraint body 3, improving the practicability, the top surface of the base 1 is connected with a mounting frame 16, a moving groove 17 is arranged on one side of the inside of the mounting frame 16, a lead screw 18 is rotatably connected in the inside of the moving groove 17, a sliding block 19 is threadedly connected to the outer wall of the lead screw 18, one side of the sliding block 19 is connected with a connecting block 20, a fixing block 21 is arranged on one side of the connecting block 20, one side of the fixing block 21 is connected to one side of the constraint body 3, by arranging the lead screw 18, after the test is completed, the operator can rotate the lead screw 18, the rotation of the lead screw 18 can drive the connecting block 20 to move, the connecting block 20 moves to drive the fixing block 21 to move, so that the constraint body 3 can quickly separate from the inside of the placing groove 2, which facilitates the operator to clean the inner wall of the constraint body 3 and improves the work efficiency.

[0040] With reference to Figures 1-6 One side of the connecting block 20 is provided with an adjusting groove 22, a second electric push rod 23 is connected in the inside of the adjusting groove 22, one end of the telescopic shaft of the second electric push rod 23 is connected to one side of the fixing block 21, a servo motor 24 is connected to the top surface of the mounting frame 16, one end of the driving shaft of the servo motor 24 is connected to one end of the lead screw 18, by arranging the second electric push rod 23, in use, the fixing block 21 is moved by the telescopic shaft of the second electric push rod 23, the constraint body 3 can be moved to the cleaning position by the horizontal movement of the fixing block 21, which is convenient for cleaning, the lead screw 18 is driven to rotate by the driving shaft of the servo motor 24, which provides driving force for the rotation of the lead screw 18, a clamping groove 28 is arranged on the top surface of the hoop cylinder 4, a baffle 29 is movably sleeved in the inside of the clamping groove 28, positioning blocks 30 are respectively connected to the left and right sides of the hoop cylinder 4, fixed bolts 31 are threadedly connected in the inside of the positioning blocks 30, two positioning grooves 32 are arranged on the top surface of the base 1, by arranging the fixed bolts 31, in application, the operator rotates the fixed bolts 31 and dismounts the fixed bolts 31 to release the fixation of the positioning blocks 30 on the hoop cylinder 4, which facilitates the operator to mount or dismount the hoop cylinder 4, a collecting groove 26 is arranged on the top surface of the base 1, a cleaning groove 27 is respectively arranged on one side of the inside of the collecting groove 26 and the placing groove 2, a third electric push rod 33 is connected in the inside of the cleaning groove 27, a cleaning plate 34 is connected to one end of the telescopic shaft of the third electric push rod 33, by arranging the third electric push rod 33, after the operator cleans the large rock medium in the inside of the placing groove 2, the cleaning plate 34 is moved by the telescopic shaft of the third electric push rod 33, the collected powder in the inside of the collecting groove 26 and the placing groove 2 is cleaned by the cleaning plate 34, which improves the cleaning effect.

[0041] Example two

[0042] ReferenceFigures 1-6 As shown, the application also discloses a variable stiffness side limit type geotechnical mechanics test device and a use method thereof.

[0043] S100: The operator prepares the selected rock medium sample into a square shape, and flattens and polishes the rock medium sample, so that the four sides of the rock medium sample can be attached to the inner wall of the constraint body 3 respectively. The extrusion block 6 is pushed downward to apply pressure to the rock medium inside the constraint body 3 until the rock medium sample is damaged. The readings of the pressure sensor and the displacement sensor inside the constraint body 3 are obtained to obtain the stress and deformation of the four sides of the rock medium sample, and the rock medium mechanics experiment is completed.

[0044] S200: After the test is completed, the fixed bolt 31 is rotated, and the hoop cylinder 4 is disassembled to release the constraint on the constraint body 3. At this time, the operator can clean the broken rock medium inside the placing groove 2, and at the same time, the third electric push rod 33 is started to process the powder at the bottom of the placing groove 2, so as to process the residual rock medium inside the placing groove 2.

[0045] S300: The servo motor 24 is started to drive the lead screw 18 to rotate, so that the sliding block 19 moves vertically upward, so that the constraint body 3 is separated from the placing groove 2. Then the second electric push rod 23 is started to drive the constraint body 3 to move in the direction of the collecting groove 26, and moves above the collecting groove 26. The first electric push rod 14 is started to drive the moving block 8 to move downward, and the scraper 9 and the brush 10 clean the inner wall of the constraint body 3, so as to process the inner wall of the constraint body 3.

[0046] S400: During the movement of the moving block 8, the vibration motor 12 is started to drive the brush 10 to vibrate, so as to accelerate the cleaning of the inside of the constraint body 3. After cleaning is completed, the third electric push rod 33 is started to drive the cleaning plate 34 to clean the dust inside the collecting groove 26.

[0047] Working principle: please refer to Figures 1-6As shown, by setting the constraint body 3, in use, the operator prepares the selected rock medium sample into a square, and flattens and polishes the rock medium sample, so that the four sides of the rock medium sample can be attached to the inner wall of the constraint body 3 respectively, and the rock medium is subjected to pressure by the extrusion block 6 until the rock medium sample is damaged, and the stress and deformation of the four sides of the rock medium sample are obtained through the readings of the internal pressure sensor and displacement sensor of the constraint body 3, the rock medium mechanical experiment is completed, after the test is completed, the operator cleans the broken rock medium inside the constraint body 3, the operator pushes the moving block 8, and the inner wall of the constraint body 3 is cleaned by the scraper 9, and then the inner wall of the constraint body 3 is cleaned by the brush 10, so as to avoid the residual rock medium powder particles on the inner wall of the constraint body 3, and the purpose of cleaning the inside of the constraint body 3 is achieved, by setting the first electric push rod 14, in use, after the test is completed, the operator can place the constraint body 3 at the bottom position of the second support frame 7, the moving block 8 is driven by the first electric push rod 14, the cleaning effect of the inner wall of the constraint body 3 is improved by the vibration of the brush 10 generated by the vibration motor 12, the rock medium inside the constraint body 3 is subjected to pressure by the extrusion block 6 moved by the extension shaft of the cylinder 15, the practicality is improved, by setting the lead screw 18, after the test is completed, the operator can rotate the lead screw 18, the connecting block 20 is driven to move by the rotation of the lead screw 18, the fixed block 21 is driven to move by the movement of the connecting block 20, so that the constraint body 3 can be quickly separated from the inside of the placing groove 2, the operator can clean the inner wall of the constraint body 3, the working efficiency is improved, by setting the second electric push rod 23, in use, the fixed block 21 is moved by the extension shaft of the second electric push rod 23, the constraint body 3 can be moved to the cleaning position by the horizontal movement of the fixed block 21, which is convenient for cleaning, the rotation of the lead screw 18 is driven by the rotation of the servo motor 24, the purpose of providing driving force for the rotation of the lead screw 18 is achieved, by setting the fixed bolt 31, in application, the operator rotates the fixed bolt 31, disassembles the fixed bolt 31, and releases the fixation of the positioning block 30 to the hoop cylinder 4, which is convenient for the operator to install or disassemble the hoop cylinder 4, by setting the third electric push rod 33, when cleaning, after the operator cleans the large rock medium inside the placing groove 2, the cleaning plate 34 is moved by the extension shaft of the third electric push rod 33, and the collected powder inside the collecting groove 26 and the placing groove 2 is cleaned by the cleaning plate 34, the cleaning effect is improved.

[0048] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A variable stiffness side confinement rock and soil mechanics testing device, characterized in that: include: A base (1) is provided with a placement groove (2) on the top surface of the base (1), a constraint body (3) is provided inside the placement groove (2), a hoop (4) is sleeved on the outer wall of the constraint body (3), a plurality of instrument grooves (25) are provided on the inner wall of the constraint body (3), and a pressure sensor and a displacement sensor are connected to the inside of each of the instrument grooves (25); A first support frame (5), the first support frame (5) is connected to the top surface of the base (1), and an extrusion block (6) is provided on the bottom surface of the first support frame (5); A cleaning component is provided on the top surface of the base (1) and is used for cleaning the inner wall of the constraint body (3). The cleaning component comprises a second support frame (7), the second support frame (7) is connected to the top surface of the base (1), a moving block (8) is provided on the inner bottom surface of the second support frame (7), a scraper (9) is connected to the bottom surface of the moving block (8), and a brush (10) is provided on the outer wall of the moving block (8).

2. The variable stiffness side-confined rock and soil mechanics testing device according to claim 1, characterized in that: The cleaning component also includes: A plurality of mounting grooves (11), wherein the plurality of mounting grooves (11) are respectively provided on the outer wall surface of the moving block (8), a vibration motor (12) is connected inside the mounting grooves (11), and a vibration end of the vibration motor (12) is connected to the inner wall of the brush (10); A pushing groove (13) is provided on the top surface of the second support frame (7), a first electric push rod (14) is connected to the interior of the pushing groove (13), and one end of the telescopic shaft of the first electric push rod (14) is connected to the top surface of the moving block (8).

3. The variable stiffness side-confined rock and soil mechanics testing device according to claim 1, characterized in that: The top surface of the first support frame (5) is connected to a cylinder (15), and one end of the telescopic shaft of the cylinder (15) is connected to the top surface of the extrusion block (6).

4. The variable stiffness side confinement rock and soil mechanics testing device according to claim 1, characterized in that: The top surface of the base (1) is connected to a mounting frame (16), a movable groove (17) is provided on one side of the interior of the mounting frame (16), a screw rod (18) is rotatably connected to the interior of the movable groove (17), an outer wall of the screw rod (18) is threadedly connected to a slider (19), one side of the slider (19) is connected to a connecting block (20), one side of the connecting block (20) is provided with a fixed block (21), and one side of the fixed block (21) is connected to one side of the constraint body (3).

5. The variable stiffness side-confined rock and soil mechanics testing device according to claim 1, characterized in that: An adjustment slot (22) is provided on one side of the connecting block (20), a second electric push rod (23) is connected inside the adjustment slot (22), one end of the telescopic shaft of the second electric push rod (23) is connected to one side of the fixed block (21), a servo motor (24) is connected to the top surface of the mounting frame (16), and one end of the drive shaft of the servo motor (24) is connected to one end of the screw rod (18).

6. The variable stiffness side-confined rock and soil mechanics testing device according to claim 1, characterized in that: The top surface of the hoop tube (4) is provided with a slot (28), the interior of the slot (28) is movably sleeved with a baffle (29), the left and right sides of the hoop tube (4) are respectively connected with positioning blocks (30), the internal threads of the positioning blocks (30) are connected with fixing bolts (31), and the top surface of the base (1) is provided with two positioning slots (32).

7. The variable stiffness side-confined rock and soil mechanics testing device according to claim 1, characterized in that: A collecting groove (26) is provided on the top surface of the base (1), and a cleaning groove (27) is provided on one side of the inner portion of the collecting groove (26) and the placement groove (2). A third electric push rod (33) is connected to the inner portion of the cleaning groove (27), and a cleaning plate (34) is connected to one end of the telescopic shaft of the third electric push rod (33).

8. The variable stiffness side-confined rock and soil mechanics testing device according to claim 7, characterized in that: The specific steps are as follows: S100: The operator prepares the selected rock medium sample into a square shape, and levels and polishes the rock medium sample so that the four sides of the rock medium sample can respectively fit with the inner wall of the constraint body (3). Then, the operator pushes the extrusion block (6) downward to apply pressure to the rock medium inside the constraint body (3) until the rock medium sample is destroyed. The operator obtains the readings of the pressure sensor and displacement sensor inside the constraint body (3) to obtain the stress and deformation conditions of the four sides of the rock medium sample, thus completing the rock medium mechanics experiment. S200: After the test is completed, the fixing bolt (31) is rotated to remove the hoop (4) and release the restriction on the constraint body (3). At this time, the operator can clean the crushed rock medium inside the placement tank (2) and start the third electric push rod (33) to process the powder at the bottom of the placement tank (2) to process the residual rock medium inside the placement tank (2); S300: Start the servo motor (24), drive the screw rod (18) to rotate, and move the slider (19) vertically upward, so that the constraint body (3) is separated from the inside of the placement groove (2), and then start the second electric push rod (23), drive the constraint body (3) to move in the direction of the collection groove (26), move to the top of the collection groove (26), start the first electric push rod (14), drive the moving block (8) to move downward, and drive the scraper block (9) and the brush (10) to clean the inner wall of the constraint body (3), so as to achieve the treatment of the inner wall of the constraint body (3); S400: During the movement of the moving block (8), the vibration motor (12) is started to drive the brush (10) to vibrate and accelerate the cleaning of the interior of the constraint body (3). After the cleaning is completed, the third electric push rod (33) is started to drive the cleaning plate (34) to clean the dust inside the collection tank (26).

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