Stacked ring type shearing instrument with temperature control and seepage pressure coupling control

Abstract

The invention discloses a stacked ring type shearing instrument with temperature control and seepage pressure coupling control, which comprises a shearing device positioned in a constant temperature chamber, the shearing device comprises an upper shearing box and a lower shearing box, the outer part of the lower shearing box is of a cuboid structure, and a circular groove is formed in the lower shearing box and is used for placing a test piece; the bottom of the lower shear box penetrates through the base through a water outlet pipe and is connected with the water tank; a water pressure gauge 2 is arranged on the water outlet pipe and is used for measuring the water pressure when the water flows out. The exterior of the upper shear box is of a cuboid structure, a round hole is formed in the upper shear box and used for installing a pressure chamber and placing a sample, the top of the upper shear box is connected with a vertical stress loading device, one side of the base is externally connected with a transverse stress loading device and a seepage control device, and the whole structure is further provided with a temperature control device. The problems that in the prior art, a stacked ring type shear apparatus cannot stably apply seepage water pressure to a sample and cannot keep the experimental environment at a specific temperature are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a stacked ring shearing instrument with temperature control and seepage pressure coupling control. Background Art

[0002] At present, there are many shear test devices that can measure the shear strength of coarse-grained soil with a sample size of less than 60mm, such as direct shear testers and ring shear testers. The failure surface of the traditional direct shear test shear tester is fixed and the shear stress distribution is uneven. The boundary conditions of the single shear test are not clear, while the stacked ring shear tester can better reflect the contact characteristics and actual failure surface between media, and the deformation conditions of the media are closer to the actual situation.

[0003] In actual engineering, soil is often affected by multiple physical fields, such as temperature field, seepage field, etc. Under the multi-field coupling test function, the test can simultaneously simulate the shear performance of soil under the action of multiple physical fields such as temperature and seepage, providing more accurate parameter basis for engineering design and construction under complex working conditions.

[0004] Therefore, it is necessary to develop a stacked ring shear test device and a method for using the device with coupled temperature control and seepage pressure control. Summary of the invention

[0005] The purpose of the present invention is to provide a stacked ring shearing instrument with temperature control and seepage pressure coupling control, which solves the problem that the stacked ring shearing instrument in the prior art cannot stably apply seepage water pressure to the sample and keep the experimental environment at a specific temperature.

[0006] The technical solution adopted by the present invention is a stacked ring shear instrument with temperature control and seepage pressure coupling control, including a shearing device located inside a constant temperature chamber, the shearing device including an upper shear box and a lower shear box, the lower shear box is used to place the test specimen, the bottom of the lower shear box is connected to the water tank through the base via an outlet pipe, the upper shear box is used to install the pressure chamber and place the sample, the top of the upper shear box 1 is connected to the vertical stress loading device, and one side of the base is externally connected to a lateral stress loading device and a seepage control device, and the entire structure is also provided with a temperature control device.

[0007] The present invention is also characterized in that: A stacked ring shear instrument with coupled control of temperature control and seepage pressure is characterized in that it includes a shearing device located inside a constant temperature chamber, the shearing device includes an upper shear box and a lower shear box, the lower shear box is used to place test specimens, the bottom of the lower shear box is connected to a water tank through a water outlet pipe passing through the base, the upper shear box is used to install a pressure chamber and place specimens, the top of the upper shear box is connected to a vertical stress loading device, one side of the base is externally connected to a lateral stress loading device and a seepage control device, and the entire structure is also provided with a temperature control device.

[0008] The pressure chamber is composed of several layers of needle roller rows and several layers of steel plate stacking rings. The steel plate stacking rings are square outside and round inside, and are laid alternately with the needle roller rows. Holes are opened on the topmost layer of steel plate stacking rings for bolting to the lower piston rod member of the vertical stress loading device, thereby fixing the upper shear box.

[0009] A latex film is laid in the upper shear box, and sealed rubber plugs are provided at the joints between the upper shear box and the lower shear box and at the joints of the lower piston rod member to ensure the airtightness of the shear box.

[0010] The vertical stress loading device is provided with an upper cover plate component, a middle cover plate component, a lower cover plate component and a lower piston rod component in sequence from top to bottom. The upper cover plate component is arranged on the upper part of the support frame, and the upper cover plate component and the top frame on the top of the support frame jointly form an oil pressure buffer zone; the middle cover plate component is connected to the inner side of the support frame by a telescopic connection mechanism, wherein the telescopic connection mechanism is composed of a fixed component and a telescopic rod component, the fixed component is connected to the support frame to fix and limit the movement of the telescopic rod, and the telescopic rod component is connected to the middle cover plate component to make the middle Due to the movable function of the cover plate component, the middle cover plate component and the upper cover plate component form a high-pressure area, and the middle cover plate component and the lower piston rod component are connected by bolts; the outer square and inner circle of the lower cover plate component are placed in the slot at the bottom of the support frame, and are connected to the support frame by bolts, and the bolts are arranged horizontally, and the lower cover plate component and the middle cover plate component form a low-pressure area; the lower piston rod component and the middle cover plate component are bolted, the bottom of the lower piston rod component is tightly fitted with the lower cover plate component, and is in direct contact with the test piece, and the oil pressure buffer zone, the high-pressure zone, and the low-pressure zone are tightly connected with the support frame.

[0011] The upper part of the support frame includes a hydraulic inlet and a 1-connecting pipe. The oil pressure buffer uses the hydraulic inlet to realize the inflow of hydraulic liquid. A one-way valve is arranged on the hydraulic inlet. The oil pressure buffer exchanges liquid with the high pressure area through the 1-connecting pipe. A 1-flow controller is arranged on the connecting vessel. The middle part of the support frame includes a 2-connecting vessel. The high pressure area exchanges liquid with the oil pressure buffer through the 1-connecting pipe. The high pressure area exchanges liquid with the low pressure area through the 2-connecting vessel. A 2-flow controller is arranged on the 2-connecting vessel. The lower part of the support frame includes a pressure relief valve and a seepage water pipe. The low pressure area exchanges liquid with the high pressure area through the 2-connecting vessel. The low pressure area uses the pressure relief valve to keep the internal pressure constant. Water flows into the device through the seepage water pipe. The middle cover plate component separates the high pressure area from the low pressure area. The vertical stress is applied to the middle cover plate component by the pressure difference generated by the high pressure area and the low pressure area, and then transmitted to the specimen through the lower piston rod component, thereby realizing the vertical stress loading on the specimen.

[0012] The structure of the transverse stress loading device is similar to that of the vertical stress loading device. The difference is that the transverse stress of the transverse stress loading device is applied to the middle cover plate component by the pressure difference generated by the high-pressure area and the low-pressure area, and then transmitted to the specimen through the piston rod component on one side, thereby realizing the transverse stress loading of the specimen.

[0013] The oil pressure buffer, the high pressure zone and the low pressure zone are respectively provided with hydraulic sensors, hydraulic sensors and hydraulic sensors. The piston rod member in the transverse stress loading device is provided with a displacement sensor. The hydraulic sensors, hydraulic sensors, hydraulic sensors, 1-flow controller and 2-flow controller are respectively electrically connected to the external high and low pressure intelligent feedback control system. The high and low pressure intelligent feedback control system is a computer embedded program, including a display and a computer. The high and low pressure intelligent feedback control system collects data, integrates it with preset parameters and feeds it back to the 1-flow controller and the 2-flow controller, and then controls the flow exchange between the oil pressure buffer and the high pressure zone, and the high pressure zone and the low pressure zone through the 1-flow controller and the 2-flow controller, thereby realizing the intelligent regulation of vertical stress loading. The displacement sensor is electrically connected to the computer control system, and the computer control system is a computer embedded program, including a display and a computer. It should be noted that the computer control system can adjust the displacement sensor to "0" and export the displacement data in real time after the test starts.

[0014] The seepage control device includes an inlet pipe, a hose and an outlet pipe. One end of the inlet pipe is connected to one end of the hose inside the low-pressure zone, and the other end of the hose passes through the lower piston rod component and is connected to the central water pipe, so that the seepage water pressure directly acts on the top of the specimen. A water pump is provided on the inlet pipe to provide a stable water flow into the shear box; a 1-water pressure gauge is also provided on the inlet pipe to measure the water pressure when the water flows in. After the inlet pipe enters the low-pressure zone, it is connected with a hose to prevent the water pressure from fluctuating due to the movement of the lower piston rod component during loading. A water outlet pipe is provided at the bottom of the shear instrument, and a water tank is connected to the outlet pipe to achieve the purpose of circulating water; a 2-water pressure gauge is provided to measure the water pressure when the water flows out.

[0015] The temperature control module includes a constant temperature box, which is fixed on three sides and has a movable window on one side. A handle and a latch are arranged on the movable window to facilitate opening and closing of the window. An opening on one side of the constant temperature box fits tightly with the hydraulic straight rod of the lateral stress loading device. A heating rod is also arranged at the bottom of the lower shear box, and a heating coil is also arranged on the outside of the upper shear box. The heating coil is placed on the three fixed sides of the constant temperature box. The heating rod and the heating coil are connected in parallel to form a heater. A temperature sensor is arranged on the constant temperature box. The temperature sensor and the heater are connected to a computer control system and then connected in series with a power supply to realize the opening and closing of the heating component and the monitoring and control of the temperature of the specimen.

[0016] The support frame is arranged on the base, the three-chamber hydraulically coupled vertical stress loading device is arranged on the upper part of the support frame, and the top frame is provided with a pressure relief device and a pressure gauge for observing the pressure in the instrument.

[0017] The beneficial effects of the present invention are that the stacked ring shearing apparatus with temperature control and seepage pressure coupling control, firstly, utilizes the hydraulic principle and three-chamber hydraulic coupling to realize efficient loading of the vertical stress of the specimen. Secondly, the present invention has a circulating seepage regulation system to obtain a stable seepage water pressure, and flexibly utilizes the characteristics of the water pipe and the hose so that the water pressure will not fluctuate due to the movement of the lower piston rod component during the loading process. At the same time, the present invention has a temperature control device, and the constant temperature chamber can effectively maintain the test environment. The use of heating rods and heating coils can make the temperature loading on the specimen uniform, thereby improving the authenticity and reliability of the test results. The specimen is subjected to a single shear test under a certain normal pressure, seepage water pressure and temperature. The test process is highly intelligent and has the advantages of being simple and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a stacked ring shearing instrument with temperature control and seepage pressure coupling control of the present invention; Figure 2 is a schematic structural diagram of a shear box in an embodiment of the present invention; Figure 3 is a schematic structural diagram of a transverse stress loading device in an embodiment of the present invention; Figure 4 Graph showing the relationship between normal displacement and shear displacement in a shear test according to an embodiment of the present invention.

[0019] In the figure, 1. upper shear box, 2. lower shear box, 3. roller row, 4. constant temperature box, 5. needle roller row, 6. steel plate stacking ring, 7. uppermost steel plate stacking ring, 8. upper cover plate component, 9. middle cover plate component, 10. lower cover plate component, 11. lower piston rod component, 12. oil pressure buffer zone, 13. high pressure zone, 14. low pressure zone, 15. hydraulic inlet, 16. 1-connecting pipe, 17. 2-flow controller, 18. 1-connecting pipe, 19. 2-flow controller, 20. pressure relief valve, 21 .Hydraulic sensor, 22. Hydraulic sensor, 23. Hydraulic sensor, 24. Displacement sensor, 25. High and low pressure intelligent feedback control system, 26. Computer control system, 27. Water inlet pipe, 28. Hose, 29. Water outlet pipe, 30. Water pump, 31.1- Water pressure gauge, 32.2- Water pressure gauge, 33 Temperature sensor, 34 Heating rod, 35 Heating coil, 36 Base, 37 Support frame, 38 Top frame, 39 Pressure relief device, 40 Water tank, 41 Pressure gauge, 42 Telescopic connection mechanism. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] The present invention has a stacked ring shearing instrument with temperature control and seepage pressure coupling control, and the structure is as follows Figure 1 As shown, Figure 1 As shown, it includes a shearing device located inside a constant temperature chamber 4, and the shearing device includes an upper shear box 1 and a lower shear box 2. The lower shear box 2 is a rectangular parallelepiped structure on the outside, and has a circular groove inside for placing test specimens. The bottom of the lower shear box 2 is connected to a water tank 40 through a water outlet pipe 29 through a base 36. The water outlet pipe 29 is connected to the water tank 40 for the purpose of circulating water. A 2-water pressure gauge 32 is provided on the water outlet pipe 29 for measuring the water pressure when the water flows out. The upper shear box 1 is a rectangular parallelepiped structure on the outside, and has a circular hole inside for installing a pressure chamber and placing a specimen. The top of the upper shear box 1 is connected to a vertical stress loading device, and one side of the base is externally connected to a lateral stress loading device and a seepage control device. The entire structure is also provided with a temperature control device.

[0022] like Figure 2 As shown, the pressure chamber is composed of several layers of needle roller rows 5 and several layers of steel plate stacking rings 6. The steel plate stacking rings 6 are square outside and round inside, and are laid alternately with the needle roller rows 5 to reduce the friction resistance generated during the shearing process. A hole is opened on the topmost steel plate stacking ring 7 for bolting to the lower piston rod component 11 of the vertical stress loading device, thereby fixing the upper shear box 1.

[0023] In order to prevent water from seeping out of the shear box during the test, a latex film is laid inside the upper shear box 1, and sealed rubber plugs are provided at the joints between the upper shear box 1 and the lower shear box 2 and at the joints of the lower piston rod member 11 to ensure the airtightness of the shear box.

[0024] like Figure 1As shown, the vertical stress loading device is provided with an upper cover plate member 8, a middle cover plate member 9, a lower cover plate member 10 and a lower piston rod member 11 in sequence from top to bottom. The upper cover plate member 8 is arranged on the upper part of the support frame 37. The support frame 37 and the upper cover plate member 8 are provided with a card slot at the contact position at both ends, and a sealing rubber ring is provided in the card slot. The upper cover plate member 8 and the top frame 38 at the top of the support frame 37 form an oil pressure buffer zone 12 together; the middle cover plate member 9 is connected to the inner side of the support frame 37 by a telescopic connection mechanism 42, wherein the telescopic connection mechanism 42 is composed of a fixed member and a telescopic rod member, and the fixed member is connected to the support frame 37 to fix and limit the movement of the telescopic rod, and the telescopic The rod member is connected to the middle cover member 9 to make the middle cover member 9 movable. The middle cover member 9 and the upper cover member 8 form a high-pressure zone 13. The middle cover member 9 and the lower piston rod member 11 are connected by bolts. The outer square and inner circle of the lower cover member 10 are placed in the groove at the lower part of the support frame 37 and are connected to the support frame 37 by bolts. The bolts are arranged horizontally, and the lower cover member 10 and the middle cover member 9 form a low-pressure zone 14. The lower piston rod member 11 is bolted to the middle cover member 9. The bottom of the lower piston rod member 11 is tightly fitted with the lower cover member 10 and is in direct contact with the test piece. The oil pressure buffer zone 12, the high-pressure zone 13, and the low-pressure zone 14 are tightly connected to the support frame 37.

[0025] The upper part of the support frame 37 includes a hydraulic inlet 15 and a 1-connecting pipe 16. The hydraulic buffer zone 12 uses the hydraulic inlet 15 to realize the inflow of hydraulic liquid. A one-way valve is arranged on the hydraulic inlet 15. The hydraulic buffer zone 12 exchanges liquid with the high-pressure zone 13 through the 1-connecting pipe 16. A 1-flow controller 17 is arranged on the connecting vessel. The middle part of the support frame 37 includes a 2-connecting vessel 18. The high-pressure zone 13 exchanges liquid with the hydraulic buffer zone 12 through the 1-connecting pipe 16. The high-pressure zone 13 exchanges liquid with the low-pressure zone 14 through the 2-connecting vessel 18. The 2-connecting vessel 18 exchanges liquid with the low-pressure zone 14. 8 is provided with a 2-flow controller 19; the lower part of the support frame 37 includes a pressure relief valve 20 and a seepage water pipe 27. The low-pressure area 14 exchanges liquid with the high-pressure area 13 through the 2-connecting vessel 18. The low-pressure area 14 uses the pressure relief valve 20 to keep the internal pressure constant. Water flows into the device through the seepage water pipe 27. The middle cover plate component 9 separates the high-pressure area 13 from the low-pressure area 14. The vertical stress is applied to the middle cover plate component 9 by the pressure difference generated by the high-pressure area 13 and the low-pressure area 14, and then transmitted to the specimen through the lower piston rod 11 component, thereby realizing the vertical stress loading on the specimen.

[0026] like Figure 3As shown, the structure of the transverse stress loading device is similar to that of the vertical stress loading device, except that the transverse stress of the transverse stress loading device is applied to the middle cover plate component 9 by the pressure difference generated by the high-pressure area 13 and the low-pressure area 14, and then transmitted to the specimen through the piston rod component 11 on one side, thereby realizing the transverse stress loading of the specimen.

[0027] like Figure 1 As shown, the oil pressure buffer 12, the high pressure zone 13 and the low pressure zone 14 are respectively provided with hydraulic sensors 21, 22 and 23, and the piston rod member 11 in the transverse stress loading device is provided with a displacement sensor 24. The hydraulic sensors 21, 22, 23, 1-flow controller 17 and 2-flow controller 19 are respectively electrically connected to the external high and low pressure intelligent feedback control system 25, and the high and low pressure intelligent feedback control system 25 is a computer embedded program, including a display and a computer. The high and low pressure intelligent feedback control system 25 collects data, integrates it with the preset parameters and feeds it back to the 1-flow controller 17 and the 2-flow controller 19, and then controls the flow exchange between the oil pressure buffer 12 and the high pressure zone 13, and the high pressure zone 13 and the low pressure zone 14 through the 1-flow controller 17 and the 2-flow controller 19, thereby realizing the intelligent regulation of vertical stress loading. The displacement sensor 24 is electrically connected to the computer control system 26, and the computer control system 26 is a computer embedded program, including a display and a computer. It should be noted that the computer control system 26 can adjust the displacement sensor 24 to "0" and export the displacement data in real time after the test begins.

[0028] The seepage control device includes an inlet pipe 27, a hose 28 and an outlet pipe 29. One end of the inlet pipe 27 is connected to one end of the hose 28 inside the low-pressure zone 14, and the other end of the hose 28 passes through the lower piston rod member 11 and is connected to the central water pipe therein, so that the seepage water pressure directly acts on the top of the specimen. A water pump 30 is provided on the inlet pipe 27 to provide a stable water flow into the shear box; a 1-water pressure gauge 31 is also provided on the inlet pipe 27 to measure the water pressure when the water flows in. After the inlet pipe 27 enters the low-pressure zone 14, it is connected with the hose 28 to prevent the water pressure from fluctuating due to the movement of the lower piston rod member 11 during the loading process. A water outlet pipe 29 is provided at the bottom of the shear instrument, and a water tank 40 is connected to the outlet pipe 29 to achieve the purpose of circulating water; a 2-water pressure gauge 32 is provided to measure the water pressure when the water flows out.

[0029] The temperature control module includes a thermostat 4, which is fixed on three sides and has a movable window on one side. A handle and a latch are provided on the movable window to facilitate opening and closing of the window. The opening on one side of the thermostat 4 is tightly fitted with the hydraulic straight rod of the transverse stress loading device. A heating rod 34 is also provided at the bottom of the lower shear box 2, and a heating coil 35 is also provided on the outside of the upper shear box 1. The heating coil 35 is placed on the three fixed sides of the thermostat 4. The heating rod 34 and the heating coil 35 are connected in parallel to form a heater. The heating elements are provided around the specimen to make the temperature loading on the specimen uniform. The temperature sensor 33 is provided on the thermostat 4. The temperature sensor 33 is connected to the heater and the computer control system 26, and then connected in series with the power supply to realize the opening and closing of the heating component and the monitoring and control of the specimen temperature.

[0030] The support frame 37 is arranged on the base 36, the three-chamber hydraulically coupled vertical stress loading device is arranged on the upper part of the support frame 37, and the top frame 38 is provided with a pressure relief device 39 and a pressure gauge 41 for observing the pressure in the instrument.

[0031] Example 1 The present invention has a stacked ring shearing instrument with temperature control and seepage pressure coupling control, and the structure is as follows Figure 1 As shown, Figure 1 As shown, it includes a shearing device located inside a constant temperature chamber 4, and the shearing device includes an upper shear box 1 and a lower shear box 2. The lower shear box 2 is a rectangular parallelepiped structure on the outside, and has a circular groove inside for placing test specimens. The bottom of the lower shear box 2 is connected to a water tank 40 through a water outlet pipe 29 through a base 36. The water outlet pipe 29 is connected to the water tank 40 for the purpose of circulating water. A 2-water pressure gauge 32 is provided on the water outlet pipe 29 for measuring the water pressure when the water flows out. The upper shear box 1 is a rectangular parallelepiped structure on the outside, and has a circular hole inside for installing a pressure chamber and placing a specimen. The top of the upper shear box 1 is connected to a vertical stress loading device, and one side of the base is externally connected to a lateral stress loading device and a seepage control device. The entire structure is also provided with a temperature control device.

[0032] Example 2 The present invention has a stacked ring shearing instrument with temperature control and seepage pressure coupling control, and the structure is as follows Figure 1 As shown, Figure 1As shown, it includes a shearing device located inside a constant temperature chamber 4, and the shearing device includes an upper shear box 1 and a lower shear box 2. The lower shear box 2 is a rectangular parallelepiped structure on the outside, and has a circular groove inside for placing test specimens. The bottom of the lower shear box 2 is connected to a water tank 40 through a water outlet pipe 29 through a base 36. The water outlet pipe 29 is connected to the water tank 40 for the purpose of circulating water. A 2-water pressure gauge 32 is provided on the water outlet pipe 29 for measuring the water pressure when the water flows out. The upper shear box 1 is a rectangular parallelepiped structure on the outside, and has a circular hole inside for installing a pressure chamber and placing a specimen. The top of the upper shear box 1 is connected to a vertical stress loading device, and one side of the base is externally connected to a lateral stress loading device and a seepage control device. The entire structure is also provided with a temperature control device.

[0033] like Figure 2 As shown, the pressure chamber is composed of several layers of needle roller rows 5 and several layers of steel plate stacking rings 6. The steel plate stacking rings 6 are square outside and round inside, and are laid alternately with the needle roller rows 5 to reduce the friction resistance generated during the shearing process. A hole is opened on the topmost steel plate stacking ring 7 for bolting to the lower piston rod component 11 of the vertical stress loading device, thereby fixing the upper shear box 1.

[0034] Example 3 The present invention has a stacked ring shearing instrument with temperature control and seepage pressure coupling control, and the structure is as follows Figure 1 As shown, Figure 1 As shown, it includes a shearing device located inside a constant temperature chamber 4, and the shearing device includes an upper shear box 1 and a lower shear box 2. The lower shear box 2 is a rectangular parallelepiped structure on the outside, and has a circular groove inside for placing test specimens. The bottom of the lower shear box 2 is connected to a water tank 40 through a water outlet pipe 29 through a base 36. The water outlet pipe 29 is connected to the water tank 40 for the purpose of circulating water. A 2-water pressure gauge 32 is provided on the water outlet pipe 29 for measuring the water pressure when the water flows out. The upper shear box 1 is a rectangular parallelepiped structure on the outside, and has a circular hole inside for installing a pressure chamber and placing a specimen. The top of the upper shear box 1 is connected to a vertical stress loading device, and one side of the base is externally connected to a lateral stress loading device and a seepage control device. The entire structure is also provided with a temperature control device.

[0035] like Figure 2 As shown, the pressure chamber is composed of several layers of needle roller rows 5 and several layers of steel plate stacking rings 6. The steel plate stacking rings 6 are square outside and round inside, and are laid alternately with the needle roller rows 5 to reduce the friction resistance generated during the shearing process. A hole is opened on the topmost steel plate stacking ring 7 for bolting to the lower piston rod component 11 of the vertical stress loading device, thereby fixing the upper shear box 1.

[0036] In order to prevent water from seeping out of the shear box during the test, a latex film is laid inside the upper shear box 1, and sealed rubber plugs are provided at the joints between the upper shear box 1 and the lower shear box 2 and at the joints of the lower piston rod member 11 to ensure the airtightness of the shear box.

[0037] like Figure 1 As shown, the vertical stress loading device is provided with an upper cover plate member 8, a middle cover plate member 9, a lower cover plate member 10 and a lower piston rod member 11 in sequence from top to bottom. The upper cover plate member 8 is arranged on the upper part of the support frame 37. The support frame 37 and the upper cover plate member 8 are provided with a card slot at the contact position at both ends, and a sealing rubber ring is provided in the card slot. The upper cover plate member 8 and the top frame 38 at the top of the support frame 37 form an oil pressure buffer zone 12 together; the middle cover plate member 9 is connected to the inner side of the support frame 37 by a telescopic connection mechanism 42, wherein the telescopic connection mechanism 42 is composed of a fixed member and a telescopic rod member, and the fixed member is connected to the support frame 37 to fix and limit the movement of the telescopic rod, and the telescopic The rod member is connected to the middle cover member 9 to make the middle cover member 9 movable. The middle cover member 9 and the upper cover member 8 form a high-pressure zone 13. The middle cover member 9 and the lower piston rod member 11 are connected by bolts. The outer square and inner circle of the lower cover member 10 are placed in the groove at the lower part of the support frame 37 and are connected to the support frame 37 by bolts. The bolts are arranged horizontally, and the lower cover member 10 and the middle cover member 9 form a low-pressure zone 14. The lower piston rod member 11 is bolted to the middle cover member 9. The bottom of the lower piston rod member 11 is tightly fitted with the lower cover member 10 and is in direct contact with the test piece. The oil pressure buffer zone 12, the high-pressure zone 13, and the low-pressure zone 14 are tightly connected to the support frame 37.

[0038] The upper part of the support frame 37 includes a hydraulic inlet 15 and a 1-connecting pipe 16. The hydraulic buffer zone 12 uses the hydraulic inlet 15 to realize the inflow of hydraulic liquid. A one-way valve is arranged on the hydraulic inlet 15. The hydraulic buffer zone 12 exchanges liquid with the high-pressure zone 13 through the 1-connecting pipe 16. A 1-flow controller 17 is arranged on the connecting vessel. The middle part of the support frame 37 includes a 2-connecting vessel 18. The high-pressure zone 13 exchanges liquid with the hydraulic buffer zone 12 through the 1-connecting pipe 16. The high-pressure zone 13 exchanges liquid with the low-pressure zone 14 through the 2-connecting vessel 18. The 2-connecting vessel 18 exchanges liquid with the low-pressure zone 14. 8 is provided with a 2-flow controller 19; the lower part of the support frame 37 includes a pressure relief valve 20 and a seepage water pipe 27. The low-pressure area 14 exchanges liquid with the high-pressure area 13 through the 2-connecting vessel 18. The low-pressure area 14 uses the pressure relief valve 20 to keep the internal pressure constant. Water flows into the device through the seepage water pipe 27. The middle cover plate component 9 separates the high-pressure area 13 from the low-pressure area 14. The vertical stress is applied to the middle cover plate component 9 by the pressure difference generated by the high-pressure area 13 and the low-pressure area 14, and then transmitted to the specimen through the lower piston rod 11 component, thereby realizing the vertical stress loading on the specimen.

[0039] The seepage control device includes an inlet pipe 27, a hose 28 and an outlet pipe 29. One end of the inlet pipe 27 is connected to one end of the hose 28 inside the low-pressure zone 14, and the other end of the hose 28 passes through the lower piston rod member 11 and is connected to the central water pipe therein, so that the seepage water pressure directly acts on the top of the specimen. A water pump 30 is provided on the inlet pipe 27 to provide a stable water flow into the shear box; a 1-water pressure gauge 31 is also provided on the inlet pipe 27 to measure the water pressure when the water flows in. After the inlet pipe 27 enters the low-pressure zone 14, it is connected with the hose 28 to prevent the water pressure from fluctuating due to the movement of the lower piston rod member 11 during the loading process. A water outlet pipe 29 is provided at the bottom of the shear instrument, and a water tank 40 is connected to the outlet pipe 29 to achieve the purpose of circulating water; a 2-water pressure gauge 32 is provided to measure the water pressure when the water flows out.

[0040] The temperature control module includes a thermostat 4, which is fixed on three sides and has a movable window on one side. A handle and a latch are provided on the movable window to facilitate opening and closing of the window. The opening on one side of the thermostat 4 is tightly fitted with the hydraulic straight rod of the transverse stress loading device. A heating rod 34 is also provided at the bottom of the lower shear box 2, and a heating coil 35 is also provided on the outside of the upper shear box 1. The heating coil 35 is placed on the three fixed sides of the thermostat 4. The heating rod 34 and the heating coil 35 are connected in parallel to form a heater. The heating elements are provided around the specimen to make the temperature loading on the specimen uniform. The temperature sensor 33 is provided on the thermostat 4. The temperature sensor 33 is connected to the heater and the computer control system 26, and then connected in series with the power supply to realize the opening and closing of the heating component and the monitoring and control of the specimen temperature.

[0041] The support frame 37 is arranged on the base 36, the three-chamber hydraulically coupled vertical stress loading device is arranged on the upper part of the support frame 37, and the top frame 38 is provided with a pressure relief device 39 and a pressure gauge 41 for observing the pressure in the instrument.

[0042] Example 4 The present invention has a stacked ring shearing instrument with temperature control and seepage pressure coupling control, and the structure is as follows Figure 1 As shown, Figure 1As shown, it includes a shearing device located inside a constant temperature chamber 4, and the shearing device includes an upper shear box 1 and a lower shear box 2. The lower shear box 2 is a rectangular parallelepiped structure on the outside, and has a circular groove inside for placing test specimens. The bottom of the lower shear box 2 is connected to a water tank 40 through a water outlet pipe 29 through a base 36. The water outlet pipe 29 is connected to the water tank 40 for the purpose of circulating water. A 2-water pressure gauge 32 is provided on the water outlet pipe 29 for measuring the water pressure when the water flows out. The upper shear box 1 is a rectangular parallelepiped structure on the outside, and has a circular hole inside for installing a pressure chamber and placing a specimen. The top of the upper shear box 1 is connected to a vertical stress loading device, and one side of the base is externally connected to a lateral stress loading device and a seepage control device. The entire structure is also provided with a temperature control device.

[0043] like Figure 2 As shown, the pressure chamber is composed of several layers of needle roller rows 5 and several layers of steel plate stacking rings 6. The steel plate stacking rings 6 are square outside and round inside, and are laid alternately with the needle roller rows 5 to reduce the friction resistance generated during the shearing process. A hole is opened on the topmost steel plate stacking ring 7 for bolting to the lower piston rod component 11 of the vertical stress loading device, thereby fixing the upper shear box 1.

[0044] In order to prevent water from seeping out of the shear box during the test, a latex film is laid inside the upper shear box 1, and sealed rubber plugs are provided at the joints between the upper shear box 1 and the lower shear box 2 and at the joints of the lower piston rod member 11 to ensure the airtightness of the shear box.

[0045] like Figure 1As shown, the vertical stress loading device is provided with an upper cover plate member 8, a middle cover plate member 9, a lower cover plate member 10 and a lower piston rod member 11 in sequence from top to bottom. The upper cover plate member 8 is arranged on the upper part of the support frame 37. The support frame 37 and the upper cover plate member 8 are provided with a card slot at the contact position at both ends, and a sealing rubber ring is provided in the card slot. The upper cover plate member 8 and the top frame 38 at the top of the support frame 37 form an oil pressure buffer zone 12 together; the middle cover plate member 9 is connected to the inner side of the support frame 37 by a telescopic connection mechanism 42, wherein the telescopic connection mechanism 42 is composed of a fixed member and a telescopic rod member, and the fixed member is connected to the support frame 37 to fix and limit the movement of the telescopic rod, and the telescopic The rod member is connected to the middle cover member 9 to make the middle cover member 9 movable. The middle cover member 9 and the upper cover member 8 form a high-pressure zone 13. The middle cover member 9 and the lower piston rod member 11 are connected by bolts. The outer square and inner circle of the lower cover member 10 are placed in the groove at the lower part of the support frame 37 and are connected to the support frame 37 by bolts. The bolts are arranged horizontally, and the lower cover member 10 and the middle cover member 9 form a low-pressure zone 14. The lower piston rod member 11 is bolted to the middle cover member 9. The bottom of the lower piston rod member 11 is tightly fitted with the lower cover member 10 and is in direct contact with the test piece. The oil pressure buffer zone 12, the high-pressure zone 13, and the low-pressure zone 14 are tightly connected to the support frame 37.

[0046] The upper part of the support frame 37 includes a hydraulic inlet 15 and a 1-connecting pipe 16. The hydraulic buffer zone 12 uses the hydraulic inlet 15 to realize the inflow of hydraulic liquid. A one-way valve is arranged on the hydraulic inlet 15. The hydraulic buffer zone 12 exchanges liquid with the high-pressure zone 13 through the 1-connecting pipe 16. A 1-flow controller 17 is arranged on the connecting vessel. The middle part of the support frame 37 includes a 2-connecting vessel 18. The high-pressure zone 13 exchanges liquid with the hydraulic buffer zone 12 through the 1-connecting pipe 16. The high-pressure zone 13 exchanges liquid with the low-pressure zone 14 through the 2-connecting vessel 18. The 2-connecting vessel 18 exchanges liquid with the low-pressure zone 14. 8 is provided with a 2-flow controller 19; the lower part of the support frame 37 includes a pressure relief valve 20 and a seepage water pipe 27. The low-pressure area 14 exchanges liquid with the high-pressure area 13 through the 2-connecting vessel 18. The low-pressure area 14 uses the pressure relief valve 20 to keep the internal pressure constant. Water flows into the device through the seepage water pipe 27. The middle cover plate component 9 separates the high-pressure area 13 from the low-pressure area 14. The vertical stress is applied to the middle cover plate component 9 by the pressure difference generated by the high-pressure area 13 and the low-pressure area 14, and then transmitted to the specimen through the lower piston rod 11 component, thereby realizing the vertical stress loading on the specimen.

[0047] like Figure 3As shown, the structure of the transverse stress loading device is similar to that of the vertical stress loading device, except that the transverse stress of the transverse stress loading device is applied to the middle cover plate component 9 by the pressure difference generated by the high-pressure area 13 and the low-pressure area 14, and then transmitted to the specimen through the piston rod component 11 on one side, thereby realizing the transverse stress loading of the specimen.

[0048] like Figure 1 As shown, the oil pressure buffer 12, the high pressure zone 13 and the low pressure zone 14 are respectively provided with hydraulic sensors 21, 22 and 23, and the piston rod member 11 in the transverse stress loading device is provided with a displacement sensor 24. The hydraulic sensors 21, 22, 23, 1-flow controller 17 and 2-flow controller 19 are respectively electrically connected to the external high and low pressure intelligent feedback control system 25, and the high and low pressure intelligent feedback control system 25 is a computer embedded program, including a display and a computer. The high and low pressure intelligent feedback control system 25 collects data, integrates it with the preset parameters and feeds it back to the 1-flow controller 17 and the 2-flow controller 19, and then controls the flow exchange between the oil pressure buffer 12 and the high pressure zone 13, and the high pressure zone 13 and the low pressure zone 14 through the 1-flow controller 17 and the 2-flow controller 19, thereby realizing the intelligent regulation of vertical stress loading. The displacement sensor 24 is electrically connected to the computer control system 26, and the computer control system 26 is a computer embedded program, including a display and a computer. It should be noted that the computer control system 26 can adjust the displacement sensor 24 to "0" and export the displacement data in real time after the test begins.

[0049] The seepage control device includes an inlet pipe 27, a hose 28 and an outlet pipe 29. One end of the inlet pipe 27 is connected to one end of the hose 28 inside the low-pressure zone 14, and the other end of the hose 28 passes through the lower piston rod member 11 and is connected to the central water pipe therein, so that the seepage water pressure directly acts on the top of the specimen. A water pump 30 is provided on the inlet pipe 27 to provide a stable water flow into the shear box; a 1-water pressure gauge 31 is also provided on the inlet pipe 27 to measure the water pressure when the water flows in. After the inlet pipe 27 enters the low-pressure zone 14, it is connected with the hose 28 to prevent the water pressure from fluctuating due to the movement of the lower piston rod member 11 during the loading process. A water outlet pipe 29 is provided at the bottom of the shear instrument, and a water tank 40 is connected to the outlet pipe 29 to achieve the purpose of circulating water; a 2-water pressure gauge 32 is provided to measure the water pressure when the water flows out.

[0050] Example 5 The method for using the stacked ring shearing instrument with temperature control and seepage pressure coupling control of the present invention is specifically implemented according to the following steps: Step 1: Prepare the test specimen and put it into the lower shear box 2, and lay the needle rows 5 and the steel plate stack rings 6 on it in an alternating manner to the designed height of the pressure chamber. Then, place the upper shear box 1 on the lower shear box 2, lay the latex film inside the upper shear box 1, and install the sealing rubber ring at the joint to seal.

[0051] Step 2: Pour the prepared soil and stone materials into the pressure chamber and vibrate and compact them until they meet the test plan and transition material filling requirements.

[0052] Step 3, push the shear box into the constant temperature box 4, start the vertical stress loading device to make the lower piston rod component 11 tightly connected with the test piece, then bolt the uppermost steel plate stack ring 7 to the lower piston rod component 11, and install a sealing rubber ring at the joint to seal.

[0053] Step 4, check air tightness; Check the air tightness: Turn on the water pump 30, wait for the external water source to flow out through the water outlet pipe 29, and then observe the pressure change of the water outlet pipe 29. If the pressure of the water outlet pipe 29 gradually stabilizes after a period of time, the air tightness of the device is good; if the pressure of the water outlet pipe 29 keeps changing after a period of time, the air tightness of the device is poor, and it is necessary to check the sealing of the latex membrane and the sealing of the rubber ring, and supplement the broken latex membrane.

[0054] It should be emphasized that during the test, the high-pressure water supply system provides water lower than the low-pressure water in the initial stage and gradually increases the pressure. The water pressure gauges installed on the water inlet pipe 27 and the water outlet pipe 29 can monitor the water pressure changes.

[0055] Step 5: Start the temperature control module, the temperature of the heating element changes, and the temperature is set to a suitable range through the computer control system 26; set the loading parameters of the high and low pressure intelligent feedback control system 25 to apply the set vertical stress to the specimen.

[0056] Step 6: After the vertical stress loading is stable, turn on the water pump 27 to obtain a stable seepage water pressure.

[0057] Step 7: Start the transverse stress loading device, set the loading parameters, and gradually increase the pressure. The sample is subjected to a single shear test under a certain normal pressure, seepage water pressure, and temperature. During the test, the shear stress and shear displacement of the sample are measured over time by the high and low pressure intelligent feedback control system 26 and the computer control system 25, and finally the stress-strain relationship of the sample is manually calculated.

[0058] Example 6 This embodiment takes the single shear test of asphalt concrete as an example, and adopts the stacked ring shear instrument with temperature control and seepage pressure coupling control of the present invention to carry out the test process, and the specific steps are as follows: Step 1: Prepare the sample Drill a hole in the center of the prepared asphalt concrete specimen with an electric drill. The diameter of the hole is 6mm. Make sure that the hole is in the center of the specimen and that water can flow through the center of the specimen from the water inlet. Weigh out the required mass of soil and stone materials of different particle sizes and mix them. Divide them into three parts for standby use. The particle sizes selected in each part of this test are <0.075mm, 0.075-5mm, 5-10mm, 10-30mm, and 30-60mm. Step 2, load asphalt concrete into the lower shear box 2, and lay needle rows 5 and steel plate stacking rings 6 on it in an alternating manner, with each stacking ring being 30 mm thick, and the top stacking ring 7 being 60 mm thick; place it to the designed height of the pressure chamber 42 cm. Then place the upper shear box 1 on the lower shear box 2 and lay a latex film inside the upper shear box 1, and install a sealing rubber ring at the joint to seal. Then pour the three well-prepared soil and stone materials into the pressure chamber in layers, and vibrate and compact each time it is added until the test plan and transition material filling requirements are met.

[0059] Step 3, push the shear box into the constant temperature box 4, start the vertical stress loading device to make the lower piston rod component 11 tightly connected with the specimen, then bolt the top steel plate stack ring 7 to the lower piston rod component 11, install a sealing rubber ring at the joint, and finally close the constant temperature box 4.

[0060] Step 4, turn on the water pump 30, wait for the external water source to flow out through the water outlet pipe 29, and observe the pressure change of the water outlet pipe 29. If the pressure of the water outlet pipe 29 gradually stabilizes after a period of time, the air tightness of the device is good; if the pressure of the water outlet pipe 29 keeps changing after a period of time, the air tightness of the device is poor, and it is necessary to check the sealing of the latex film and the sealing of the rubber ring, and supplement the broken latex film.

[0061] Step 5: Start the temperature control module, the temperature of the heating element changes, set the temperature to a suitable range through the computer control system 26, observe the constant temperature of the chamber obtained by the temperature sensor 33, and when its value is not much different from the set value and is stable, set the loading parameters of the high and low pressure intelligent feedback control system 25 to apply the set vertical stress to the specimen.

[0062] Step 6: After the vertical stress loading is stable, turn on the water pump 30. After a period of time, the pressure in the water outlet pipe 29 gradually stabilizes, that is, a stable seepage water pressure is obtained. Then, the seepage water pressure required for the test is obtained by fine-tuning the water pump valve opening.

[0063] Step 7: Start the lateral stress loading device, set the loading parameters of the high and low pressure intelligent feedback control system 25, and gradually increase the pressure. The sample is subjected to a single shear test under a certain normal pressure, seepage water pressure and temperature. During the test, the shear stress and shear displacement of the sample are measured over time by the high and low pressure intelligent feedback control system 25 and the computer control system 26, and finally the stress-strain relationship of the sample is manually calculated.

[0064] For the simple shear test, the specimen is kept under a fixed normal pressure and seepage water pressure, and the horizontal pressure is gradually increased to measure the stress-strain relationship of the specimen, such as Figure 4 As shown, the stress-strain curve conforms to the hyperbola law, indicating that under the seepage pressure conditions of this device, the test data measured conform to the law.

Claims

1. A stacked ring shearing instrument with temperature control and seepage pressure coupling control, characterized in that: The invention comprises a shearing device located inside a constant temperature chamber (4), the shearing device comprising an upper shearing box (1) and a lower shearing box (2), the lower shearing box being used to place a test specimen, the bottom of the lower shearing box (2) passing through a base (36) and connected to a water tank (40) via a water outlet pipe (29), the upper shearing box (1) being used to install a pressure chamber and place a specimen, the top of the upper shearing box (1) being connected to a vertical stress loading device, one side of the base being externally connected to a transverse stress loading device and a seepage control device, and the entire structure being further provided with a temperature control device.

2. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 1, characterized in that: The pressure chamber is composed of a plurality of layers of needle roller rows (5) and a plurality of layers of steel plate stacking rings (6). The steel plate stacking rings (6) are shaped as being square on the outside and round on the inside and are laid alternately with the needle roller rows (5). A hole is opened on the topmost layer of steel plate stacking rings (7) for bolting to the lower piston rod member (11) of the vertical stress loading device, thereby fixing the upper shear box (1).

3. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 2, characterized in that: A latex film is laid inside the upper shear box (1), and a sealed rubber plug is provided at the joint between the upper shear box (1) and the lower shear box (2) and at the joint of the lower piston rod member (11) to ensure the airtightness of the shear box.

4. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 2, characterized in that: The vertical stress loading device is provided with an upper cover plate component (8), a middle cover plate component (9), a lower cover plate component (10) and a lower piston rod component (11) in order from top to bottom. The upper cover plate component (8) is arranged on the upper part of the support frame (37). The upper cover plate component (8) and the top frame (38) at the top of the support frame (37) together form an oil pressure buffer zone (12); the middle cover plate component (9) is connected to the inner side of the support frame (37) by a telescopic connection mechanism (42), wherein the telescopic connection mechanism (42) is composed of a fixed component and a telescopic rod component. The fixed component is connected to the support frame (37) to fix and limit the movement of the telescopic rod. The telescopic rod component is connected to the middle cover plate component (9) to enable the middle cover plate component (9) to The middle cover plate member (9) and the upper cover plate member (8) form a high pressure zone (13), and the middle cover plate member (9) and the lower piston rod member (11) are connected by bolts; the lower cover plate member (10) is placed in the slot at the bottom of the support frame (37) with a square outside and a round inside, and is connected to the support frame (37) by bolts, and the bolts are arranged horizontally, and the lower cover plate member (10) and the middle cover plate member (9) form a low pressure zone (14); the lower piston rod member (11) and the middle cover plate member (9) are connected by bolts, and the bottom of the lower piston rod member (11) is tightly fitted with the lower cover plate member (10) and is in direct contact with the test piece, and the oil pressure buffer zone (12), the high pressure zone (13), and the low pressure zone (14) are tightly connected to the support frame (37).

5. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 4, characterized in that: The upper portion of the support frame (37) includes a hydraulic inlet (15), the oil pressure buffer (12) uses the hydraulic inlet (15) to realize the inflow of hydraulic liquid, a one-way valve is arranged on the hydraulic inlet (15), the oil pressure buffer (12) exchanges liquid with the high pressure area 13 through a 1-connecting pipe (16), and a 1-flow controller (17) is arranged on the connecting vessel; the middle portion of the support frame 37 includes a 2-connecting vessel (18), the high pressure area (13) exchanges liquid with the oil pressure buffer (12) through the 1-connecting pipe (16), the high pressure area (13) exchanges liquid with the low pressure area (14) through the 2-connecting vessel (18), and a 2-connecting vessel (18) is arranged on the There is a 2-flow controller (19); the lower part of the support frame (37) includes a pressure relief valve (20) and a seepage water pipe (27); the low-pressure area (14) exchanges liquid with the high-pressure area (13) through the 2-connecting vessel (18); the low-pressure area (14) uses the pressure relief valve (20) to keep the internal pressure constant; water flows into the device through the seepage water pipe (27); the middle cover plate component (9) separates the high-pressure area (13) and the low-pressure area (14); the vertical stress is applied to the middle cover plate component (9) by the pressure difference generated by the high-pressure area (13) and the low-pressure area (14), and then transmitted to the test piece through the lower piston rod (11) component, thereby realizing the vertical stress loading on the test piece.

6. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 5, characterized in that: The structure of the transverse stress loading device is similar to that of the vertical stress loading device, except that the transverse stress of the transverse stress loading device is applied to the middle cover plate component (9) by the pressure difference generated by the high-pressure area (13) and the low-pressure area (14), and then transmitted to the test piece through the piston rod component (11) on one side, thereby realizing transverse stress loading on the test piece.

7. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 6, characterized in that: The oil pressure buffer (12), the high pressure zone (13) and the low pressure zone (14) are respectively provided with a hydraulic sensor (21), a hydraulic sensor (22) and a hydraulic sensor (23); a displacement sensor (24) is provided on the piston rod member (11) in the transverse stress loading device; the hydraulic sensor (21), the hydraulic sensor (22), the hydraulic sensor (23), the 1-flow controller (17) and the 2-flow controller (19) are respectively electrically connected to an external high and low pressure intelligent feedback control system (25); the high and low pressure intelligent feedback control system (25) collects data, integrates it with preset parameters and feeds it back to the 1-flow controller (17) and the 2-flow controller (19); the 1-flow controller (17) and the 2-flow controller (19) then control the flow exchange between the oil pressure buffer (12) and the high pressure zone (13), and between the high pressure zone (13) and the low pressure zone (14), thereby realizing intelligent regulation of vertical stress loading.

8. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 7, characterized in that: The seepage control device comprises a water inlet pipe (27), a hose (28) and a water outlet pipe (29), one end of the water inlet pipe (27) is connected to one end of the hose (28) inside the low-pressure zone (14), and the other end of the hose (28) passes through the lower piston rod member (11) and is connected to the central water delivery pipe thereof, so that the seepage water pressure is directly applied to the top of the specimen. A water pump (30) is provided on the water inlet pipe (27) for providing a stable water flow into the shear box; the water inlet pipe (27) is also provided with a water pump (30) for providing a stable water flow into the shear box. A 1-water pressure gauge (31) is provided for measuring the water pressure when water flows in. After the water inlet pipe (27) enters the low-pressure area (14), it is connected with a hose (28) to prevent the water pressure from fluctuating due to the movement of the lower piston rod member (11) during the loading process. A water outlet pipe (29) is provided at the lower part of the shearing instrument. The water outlet pipe (29) is connected to a water tank (40) for the purpose of circulating water. A 2-water pressure gauge (32) is provided for measuring the water pressure when water flows out.

9. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 8, characterized in that: The temperature control module comprises a thermostatic box (4), wherein three sides of the thermostatic box (4) are fixed, one side of the thermostatic box is a movable window, and a handle and a latch are arranged on the movable window to facilitate opening and closing of the window; an opening on one side of the thermostatic box (4) is tightly fitted with a hydraulic straight rod of a transverse stress loading device, a heating rod (34) is also arranged at the bottom of the lower shear box (2), and a heating coil (35) is also arranged outside the upper shear box (1), and the heating coil (35) is placed on the three fixed sides of the thermostatic box (4), and the heating rod (34) and the heating coil (35) are connected in parallel to form a heater, and a temperature sensor (33) is arranged on the thermostatic box (4), and the temperature sensor (33) is connected to the heater and a computer control system (26) and then connected in series with a power supply to realize the opening and closing of the heating component and the monitoring and control of the temperature of the test piece.

10. The stacked ring shearing instrument with temperature control and seepage pressure coupling control according to claim 9, characterized in that: The support frame (37) is arranged on the base (36), a three-chamber hydraulically coupled vertical stress loading device is arranged on the upper part of the support frame (37), and a pressure relief device (39) and a pressure gauge (41) are arranged on the top frame (38) to observe the pressure in the instrument.

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