CN111811944B - Stress strain triaxial shear test device and test method - Google Patents
Stress strain triaxial shear test device and test method Download PDFInfo
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- CN111811944B CN111811944B CN202010592362.XA CN202010592362A CN111811944B CN 111811944 B CN111811944 B CN 111811944B CN 202010592362 A CN202010592362 A CN 202010592362A CN 111811944 B CN111811944 B CN 111811944B
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- 238000012360 testing method Methods 0.000 title claims abstract description 69
- 238000010998 test method Methods 0.000 title description 7
- 230000003204 osmotic effect Effects 0.000 claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 239000004575 stone Substances 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 238000007660 shear property test Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 description 17
- 239000000243 solution Substances 0.000 description 8
- 238000007596 consolidation process Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of shear tests, and discloses a stress strain triaxial shear test device, which comprises: a device base and more than three force application systems fixed on the device base; the force application system includes: the device comprises a confining pressure loading unit, an axial pressure loading unit, a counter pressure loading unit, an osmotic pressure loading unit, a lifting unit and a data acquisition unit. The stress strain triaxial shear test device provided by the invention can synchronously execute shear tests of different specifications on the same operation device, is efficient, and has accurate and reliable test data.
Description
Technical Field
The invention relates to the technical field of shear tests, in particular to a stress strain triaxial shear test device and a test method.
Background
In geotechnical engineering experiments, the basic working principle of the triaxial shear test device is that radial pressure loading is carried out on a pressurizing chamber by hydraulic pressure, and axial pressure is applied by mechanical loading. In the test process, data such as main stress difference, axial displacement, ambient pressure, pore water pressure, confining pressure drainage, counter pressure, upstream and downstream infiltration and the like are automatically recorded through a computer and control software, and a stress-strain relation curve of the soil body is calculated according to the recorded test data, so that deformation and strength indexes of the soil body are obtained. However, the method is usually implemented for a plurality of times, the process is complex, and the experimental conditions among various data are different due to the problem of platform standards, so that the experimental data has poor reliability.
Disclosure of Invention
The invention provides a stress strain triaxial shear test device and a test method, which achieve the technical effects of synchronously testing samples with different specifications, obtaining various test parameters with high precision and high reliability.
In order to solve the technical problems, the invention provides a stress strain triaxial shear test device, which comprises: a device base and more than three force application systems fixed on the device base;
the force application system includes: the device comprises a confining pressure loading unit, an axial pressure loading unit, a counter pressure loading unit, a osmotic pressure loading unit, a lifting unit and a data acquisition unit;
The confining pressure loading unit comprises: the device comprises a sample bag, a pressure chamber, a confining pressure pressurizing pipe and a confining pressure pressurizing structure;
The sample bag is arranged in the pressure chamber, and the confining pressure pressurizing structure is connected with the pressure chamber through the confining pressure pressurizing pipe;
The axial pressure loading unit includes: the device comprises a reaction frame, a servo motor, a speed reducer, a ball screw and a workbench;
The reaction frame is fixed on the device base, the servo motor is in transmission connection with the screw of the ball screw through the speed reducer, the workbench is fixed on the nut of the ball screw and connected, and the pressure chamber is fixed on the workbench;
the back pressure loading unit includes: a back pressure pressurizing pipe and a back pressure pressurizing structure;
The first end of the back pressure pressurizing pipe is arranged at the bottom end of the sample bag, and the second end of the back pressure pressurizing pipe is connected with the back pressure pressurizing structure;
the osmotic pressure pressurizing unit includes: an osmotic pressure pressurization tube and an osmotic pressure pressurization structure;
The first end of the osmotic pressure pressurizing pipe is arranged at the top end of the sample bag, and the second end of the osmotic pressure pressurizing pipe is connected with the osmotic pressure pressurizing structure;
The lifting unit includes: the lifting support, the air cylinder and the traction rope;
The lifting support is fixed on the device base, the cylinder body of the cylinder is fixed on the lifting support, and the piston rod of the cylinder is connected with the upper cover of the pressure chamber through the traction rope;
the data acquisition unit includes: a load sensor and a displacement sensor;
The load sensor is fixed on the reaction frame, is arranged between the reaction frame and the top end of the pressure chamber, and is abutted against the top end of the sample bag through a dowel bar;
The displacement sensor is fixed on the reaction frame and monitors the displacement of the pressure chamber.
Further, the test device further comprises: a water injection pressurizing device;
the water injection pressurizing device is respectively connected with the confining pressure pressurizing structure, the counter pressure pressurizing structure and the osmotic pressure pressurizing structure.
Further, the test device further comprises: an air source device;
The air source equipment is connected with the air cylinder.
Further, the specimen package includes: the water pressure bag, the top permeable stone and the bottom permeable stone;
The hydraulic pressure bag is provided with a sample accommodating cavity, the top permeable stone is fixed at the top of the sample accommodating cavity, the first end of the osmotic pressure pressurizing pipe is arranged at the top surface side of the top permeable stone, the bottom permeable stone is fixed at the bottom of the sample accommodating cavity, and the first end of the counter pressure pressurizing pipe is arranged at the top surface side of the bottom permeable stone;
the dowel bar is abutted between the load sensor and the top of the water pressure bag.
Further, the hydraulic bag is a plastic cylinder bag.
Further, the pressure chamber includes: a pressure chamber upper cover and a pressure chamber base;
The pressure chamber upper cover is fixed on the pressure chamber base to form a confining pressure space, and the confining pressure pressurizing pipe is communicated with the confining pressure space;
The hydraulic pressure bag is fixed on the pressure chamber base.
Further, the specifications of the pressure chambers of the three or more force application systems are different from each other.
Further, the axial pressure loading unit further includes: a limit switch;
The limit switch is arranged in the moving travel range of the workbench, and is connected with the controller of the servo motor.
A stress strain triaxial shear test method adopts the test device to execute test operation.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
According to the stress strain triaxial shear test device and the test method provided by the embodiment of the application, more than three sets of force application systems are arranged on the device base, so that the shear test of a plurality of samples can be efficiently and synchronously executed, test conditions can be ensured, the equipment platform is unified, the acquisition of each data is under the unified standard, and the reliability of the data is ensured; meanwhile, experimental operation can be uniformly executed, so that the experimental efficiency is greatly improved. Specifically, a force application system consisting of a confining pressure loading unit, an axial pressure loading unit, a back pressure loading unit, an osmotic pressure loading unit, a lifting unit and a data acquisition unit is arranged, so that three groups of mechanical tests including UU, CU, CD tests, unequal consolidation and equal consolidation (rheological) tests, saturation measurement, back pressure saturation, K0 tests, stress path tests and three-dimensional stress-osmotic coupling tests can be completed at the same time, and test time is saved; by controlling the test conditions of axial pressure, ambient pressure, counter pressure and osmotic pressure, the geological condition of the soil body can be simulated, the static stress condition of the soil body in the stratum, the change condition of pore water pressure and the like can be measured, the deformation trend of the soil body can be predicted, the rheological trend of the soil body under the action of stress can be predicted, the osmotic performance parameter of the soil body under the condition of stress can be measured, the rheological performance of the soil body under the condition of stress and osmotic coupling can be measured, the stress history of the soil body can be simulated, and the like.
Drawings
FIG. 1 is a schematic structural diagram of a stress-strain triaxial shear test device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an axial pressure loading unit according to an embodiment of the present invention
FIG. 3 is a schematic diagram of a confining pressure loading structure according to an embodiment of the invention
Fig. 4 is a graph of shear stress versus normal stress provided by an embodiment of the present invention.
Detailed Description
The embodiment of the application achieves the technical effects of synchronously testing samples with different specifications, having high precision and high reliability and effectively obtaining various test parameters by providing the stress strain triaxial shear test device and the test method.
In order to better understand the above technical solutions, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and it should be understood that specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and not limit the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Referring to fig. 1 and 2, a stress-strain triaxial shear test apparatus includes: a device base and more than three force application systems fixed on the device base; therefore, synchronous multiple groups of tests can be carried out under the unified test condition, the efficiency is improved, and meanwhile, the reliability of test data can be ensured.
Specifically, the force application system includes: a confining pressure loading unit 30, an axial pressure loading unit 20, a back pressure loading unit 40, an osmotic pressure loading unit 50, a lifting unit 60 and a data acquisition unit 80.
The confining pressure loading unit 30 includes: a sample pack 10, a pressure chamber 31, a confining pressure pressurizing pipe 32, and a confining pressure pressurizing structure 33; the sample package 10 is arranged in the pressure chamber 31, and the confining pressure pressurizing structure 33 is connected with the pressure chamber 31 through the confining pressure pressurizing pipe 32; thereby realizing the confining pressure regulation and control operation.
Wherein according to different specifications of the sample 11, three different pressure chambers 31 are divided, one pressure chamber is used for the sample of bransted 150 and bransted 101mm, and the same pressure chamber is used for the sample of bransted 39.1 and bransted 61.8; therefore, tests of samples with different diameters can be carried out simultaneously through more than 3 pressure chambers, and the influence of particle size grade on the mechanical properties of soil is considered; the osmotic creep and conventional triaxial compression can be developed according to the working requirements, and the working time efficiency is improved; the space movement of the large pressure chamber is completed by the automatic lifting unit, etc.
Referring to fig. 3, in this embodiment, the confining pressure pressurizing structure 33 includes: elevator 331, travel switch 332, piston 333, piston cylinder 334, step motor 335; the step motor 335 drives the lifter 331 to push the piston 333 to advance or retract, pressure is generated in the piston cylinder 334, two rubber tubes are arranged outside the piston cylinder 334, the rubber tubes are a water inlet tube and a water outlet tube, the water inlet tube is connected with an electric water tank for test water supply, and the water outlet tube is connected with the water inlet tube for test water supply.
Referring to fig. 2, the axial pressure loading unit 20 includes: a reaction frame 26, a servo motor 21, a speed reducer 22, a ball screw 24 and a table 26; the reaction frame 26 is fixed on the device base, the servo motor 21 is connected with the screw transmission of the ball screw 24 through the speed reducer 22, the workbench 26 is fixed on the nut of the ball screw 24 and connected, and the pressure chamber 31 is fixed on the workbench 26; the servo motor 21 is fixed to the lower body of the reaction frame 26, and is connected to the speed reducer 22 via a linkage shaft, and the servo motor 21 drives the speed reducer 22 to rotate the ball screw 24 to raise and lower the table 26 during a test. In the test, the sample 11 is placed in the pressure chamber 31, and the pressure chamber 31 is fixed to the table 26 by bolts to form a closed space.
The back pressure loading unit 40 includes: a back pressure pressurizing pipe 48 and a back pressure pressurizing structure;
The first end of the back pressure pressurizing pipe 48 is arranged at the bottom end of the sample bag 10, and the second end of the back pressure pressurizing pipe 48 is connected with the back pressure pressurizing structure; the structure of the back pressure pressurizing structure is consistent with that of the confining pressure pressurizing structure.
The osmotic pressure pressurizing unit 50 includes: an osmotic pressure pressurization tube and an osmotic pressure pressurization structure; the first end of the osmotic pressure pressurizing pipe is arranged at the top end of the sample bag 10, and the second end of the osmotic pressure pressurizing pipe is connected with the osmotic pressure pressurizing structure; the osmotic pressure pressurizing structure is consistent with the confining pressure pressurizing structure.
The lifting unit 60 includes: a lifting bracket 61, an air cylinder 62 and a traction rope 63; the lifting bracket 61 is fixed on the device base, the cylinder body of the cylinder 62 is fixed on the lifting bracket 61, and the piston rod of the cylinder 62 is connected with the upper cover of the pressure chamber 31 through the traction rope 63; thereby facilitating lifting.
The data acquisition unit 80 includes: a load sensor 81 and a displacement sensor 82; the load sensor 81 is fixed on the reaction frame 26, and the load sensor 81 is arranged between the reaction frame 26 and the top end of the pressure chamber 31 and is abutted against the top end of the sample bag 10 through a dowel bar 27; thereby facilitating monitoring of axial loading stresses.
The displacement sensor 82 is fixed to the reaction frame 26, and monitors the displacement of the pressure chamber 31.
Further, the test device further comprises: a water injection pressurizing device 722;
the water injection pressurizing device 722 is respectively connected with the confining pressure pressurizing structure, the counter pressure pressurizing structure and the osmotic pressure pressurizing structure, so as to realize high-pressure water use.
Further, the test device further comprises: an air source device; the air supply device is connected to the air cylinder 62.
Further, the specimen package includes: a hydraulic bladder 13, a water permeable stone 12, wherein the water permeable stone 12 comprises a top block and a bottom block; the hydraulic bag 13 is provided with a sample accommodating cavity, the top permeable stone is fixed at the top of the sample accommodating cavity, the first end of the osmotic pressure pressurizing pipe is arranged at the top surface side of the top permeable stone, the bottom permeable stone is fixed at the bottom of the sample accommodating cavity, and the first end of the counter pressure pressurizing pipe is arranged at the top surface side of the bottom permeable stone; the dowel bar 27 abuts between the load cell 81 and the top of the hydraulic bladder.
The upper part of the top permeable stone is provided with a dowel bar 27, the upper part of the dowel bar 27 is provided with a load sensor, and pressure data are read through a computer.
Further, the hydraulic bladder 13 is a plastic cylindrical bag, and the pressure chamber 31 includes: a pressure chamber upper cover 311 and a pressure chamber base 313;
the pressure chamber upper cover 311 is fixed on the pressure chamber base 313 to form a confining pressure space, and the confining pressure pressurizing pipe 32 is communicated with the confining pressure space; the hydraulic bladder 13 is fixed to the pressure chamber base 313.
Further, the specifications of the pressure chambers of the three or more force application systems are different from each other.
Further, the axial pressure loading unit further includes: a limit switch 25; the limit switch 2 is disposed within a moving travel range of the workbench 26, and is connected to a controller of the servo motor 21.
A stress strain triaxial shear test method adopts the test device to execute test operation.
One or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
According to the stress strain triaxial shear test device and the test method provided by the embodiment of the application, more than three sets of force application systems are arranged on the device base, so that the shear test of a plurality of samples can be efficiently and synchronously executed, test conditions can be ensured, the equipment platform is unified, the acquisition of each data is under the unified standard, and the reliability of the data is ensured; meanwhile, experimental operation can be uniformly executed, so that the experimental efficiency is greatly improved. Specifically, a force application system consisting of a confining pressure loading unit, an axial pressure loading unit, a back pressure loading unit, an osmotic pressure loading unit, a lifting unit and a data acquisition unit is arranged, so that three groups of mechanical tests including UU, CU, CD tests, unequal consolidation and equal consolidation (rheological) tests, saturation measurement, back pressure saturation, K0 tests, stress path tests and three-dimensional stress-osmotic coupling tests can be completed at the same time, and test time is saved; by controlling the test conditions of axial pressure, ambient pressure, counter pressure and osmotic pressure, the geological condition of the soil body can be simulated, the static stress condition of the soil body in the stratum, the change condition of pore water pressure and the like can be measured, the deformation trend of the soil body can be predicted, the rheological trend of the soil body under the action of stress can be predicted, the osmotic performance parameter of the soil body under the condition of stress can be measured, the rheological performance of the soil body under the condition of stress and osmotic coupling can be measured, the stress history of the soil body can be simulated, and the like.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present invention.
Claims (9)
1. A stress-strain triaxial shear test device, comprising: a device base and more than three force application systems fixed on the device base;
the force application system includes: the device comprises a confining pressure loading unit, an axial pressure loading unit, a counter pressure loading unit, a osmotic pressure loading unit, a lifting unit and a data acquisition unit;
The confining pressure loading unit comprises: the device comprises a sample bag, a pressure chamber, a confining pressure pressurizing pipe and a confining pressure pressurizing structure;
The sample bag is arranged in the pressure chamber, and the confining pressure pressurizing structure is connected with the pressure chamber through the confining pressure pressurizing pipe;
The axial pressure loading unit includes: the device comprises a reaction frame, a servo motor, a speed reducer, a ball screw and a workbench;
The reaction frame is fixed on the device base, the servo motor is in transmission connection with the screw of the ball screw through the speed reducer, the workbench is fixed on the nut of the ball screw and connected, and the pressure chamber is fixed on the workbench;
the back pressure loading unit includes: a back pressure pressurizing pipe and a back pressure pressurizing structure;
The first end of the back pressure pressurizing pipe is arranged at the bottom end of the sample bag, and the second end of the back pressure pressurizing pipe is connected with the back pressure pressurizing structure;
the osmotic pressure pressurizing unit includes: an osmotic pressure pressurization tube and an osmotic pressure pressurization structure;
The first end of the osmotic pressure pressurizing pipe is arranged at the top end of the sample bag, and the second end of the osmotic pressure pressurizing pipe is connected with the osmotic pressure pressurizing structure;
The lifting unit includes: the lifting support, the air cylinder and the traction rope;
The lifting support is fixed on the device base, the cylinder body of the cylinder is fixed on the lifting support, and the piston rod of the cylinder is connected with the upper cover of the pressure chamber through the traction rope;
the data acquisition unit includes: a load sensor and a displacement sensor;
The load sensor is fixed on the reaction frame, is arranged between the reaction frame and the top end of the pressure chamber, and is abutted against the top end of the sample bag through a dowel bar;
the displacement sensor is fixed on the reaction frame and used for monitoring the displacement of the pressure chamber;
Wherein, the diameter specification of the pressure chamber in the force application system of more than three sets is different.
2. The stress-strain triaxial shear test device according to claim 1, further comprising: a water injection pressurizing device;
the water injection pressurizing device is respectively connected with the confining pressure pressurizing structure, the counter pressure pressurizing structure and the osmotic pressure pressurizing structure.
3. The stress-strain triaxial shear test device according to claim 2, further comprising: an air source device;
The air source equipment is connected with the air cylinder.
4. The stress-strain triaxial shear test device according to claim 1, wherein said specimen package includes: the water pressure bag, the top permeable stone and the bottom permeable stone;
The hydraulic pressure bag is provided with a sample accommodating cavity, the top permeable stone is fixed at the top of the sample accommodating cavity, the first end of the osmotic pressure pressurizing pipe is arranged at the top surface side of the top permeable stone, the bottom permeable stone is fixed at the bottom of the sample accommodating cavity, and the first end of the counter pressure pressurizing pipe is arranged at the top surface side of the bottom permeable stone;
the dowel bar is abutted between the load sensor and the top of the water pressure bag.
5. The stress-strain triaxial shear test device according to claim 4, wherein the hydraulic bladder is a plastic cylindrical bag.
6. The stress-strain triaxial shear test device according to claim 4, wherein said pressure chamber includes: a pressure chamber upper cover and a pressure chamber base;
The pressure chamber upper cover is fixed on the pressure chamber base to form a confining pressure space, and the confining pressure pressurizing pipe is communicated with the confining pressure space;
The hydraulic pressure bag is fixed on the pressure chamber base.
7. The stress-strain triaxial shear test device according to claim 1, wherein the specifications of the pressure chambers of the three or more sets of force application systems are different from each other.
8. The stress-strain triaxial shear test device according to claim 1, wherein the axial pressure loading unit further includes: a limit switch;
The limit switch is arranged in the moving travel range of the workbench, and is connected with the controller of the servo motor.
9. A stress-strain triaxial shear test method, characterized in that the test operation is performed by using the test device according to any one of claims 1 to 8.
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| CN202010592362.XA CN111811944B (en) | 2020-06-24 | 2020-06-24 | Stress strain triaxial shear test device and test method |
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| CN202010592362.XA CN111811944B (en) | 2020-06-24 | 2020-06-24 | Stress strain triaxial shear test device and test method |
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| CN111811944A CN111811944A (en) | 2020-10-23 |
| CN111811944B true CN111811944B (en) | 2024-06-11 |
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| CN105203411A (en) * | 2015-11-06 | 2015-12-30 | 武汉大学 | Slit shear-seepage coupling test system of triaxial cell and test method |
| CN207300760U (en) * | 2017-09-12 | 2018-05-01 | 中国地质科学院地质力学研究所 | A kind of large-scale triaxial shear test device in situ |
| CN213337115U (en) * | 2020-06-24 | 2021-06-01 | 中国地质科学院地质力学研究所 | Stress-strain triaxial shear test device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6103658B2 (en) * | 2015-09-16 | 2017-03-29 | 国土防災技術株式会社 | Triaxial testing equipment with pressure chamber of undrained one-side shear mechanism |
| CN105973722B (en) * | 2016-07-26 | 2017-03-15 | 山东科技大学 | The constant normal stiffness shearing test device of rock discontinuum and its test method |
| CN107449678A (en) * | 2017-09-12 | 2017-12-08 | 中国地质科学院地质力学研究所 | Large-scale triaxial shear test devices and methods therefor in situ |
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2020
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| CN213337115U (en) * | 2020-06-24 | 2021-06-01 | 中国地质科学院地质力学研究所 | Stress-strain triaxial shear test device |
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