CN118050244A - High-frequency dynamic triaxial test system for measuring dynamic response of frozen and broken materials - Google Patents
High-frequency dynamic triaxial test system for measuring dynamic response of frozen and broken materials Download PDFInfo
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- CN118050244A CN118050244A CN202410449601.4A CN202410449601A CN118050244A CN 118050244 A CN118050244 A CN 118050244A CN 202410449601 A CN202410449601 A CN 202410449601A CN 118050244 A CN118050244 A CN 118050244A
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Abstract
The invention relates to the technical field of geotechnical mechanical tests, in particular to a high-frequency dynamic triaxial test system for measuring the dynamic response of frozen and broken materials, which comprises a main machine frame, a low-temperature pressure chamber, a low-temperature heat exchange device, a refrigerating device, a spindle force hydraulic loading device, a volume pressure controller, a data acquisition system, a control system and a hydraulic station, wherein the low-temperature pressure chamber is arranged at the top of the main machine frame, the low-temperature heat exchange device is arranged in the low-temperature pressure chamber, and the refrigerating device is connected with the low-temperature heat exchange device; the axial force hydraulic loading device is arranged at the bottom of the frame main frame and is connected with the low-temperature pressure chamber through the axial force transmission structure, the volume pressure controller is connected with the low-temperature pressure chamber, the data acquisition system is used for acquiring temperature, deformation and stress data of the sample, and the hydraulic station is used for providing hydraulic pressure for the axial force hydraulic loading device. The invention has the beneficial effects that: the method can realize the measurement of freezing deformation of the scattered material under the confining pressure state, and can apply a dynamic load of up to 100 Hz to the tested material.
Description
Technical Field
The invention relates to the technical field of geotechnical mechanical tests, in particular to a high-frequency dynamic triaxial test system for measuring dynamic response of frozen broken materials.
Background
In high-speed railway engineering, many field tests show that when the train speed reaches 350km per hour, the vibration frequency of the line structure changes within the range of 20 Hz-60 Hz, and the acceleration of the surface layer of the foundation bed reaches as high as 0.2 g.
The vibration frequency of dynamic load generated in the running process of the train is also in the range of 20 Hz-60 Hz, in the construction structure of the high-speed railway roadbed, coarse particle materials such as railway ballast and the like are used as supporting layers of a track structure, and broken materials such as foundation bed filler and the like are used as supporting junction layers of a track plate, so that the influence of the high-frequency dynamic load of the train is born. In addition, some lines are in special geographic and climatic conditions, such as hawk lines (Harbin to Dalian high-speed railways) and Lanxinke lines (Lanzhou to Uruku Qiuqi passenger lines), and are located in northern areas of China, so that materials such as roadbed fillers, railway ballasts and the like are frozen due to temperature reduction, but have to bear the influence of train high-frequency dynamic loads due to train operation. However, at present, a test instrument for measuring the high-frequency dynamic stress response behavior of broken materials such as fillers, railway ballasts and the like in a frozen state is still blank.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-frequency dynamic triaxial test system for measuring the dynamic response of frozen and scattered materials, which can realize the measurement of the frozen deformation of the scattered materials in a confining pressure state and can apply a dynamic load of up to 100 Hz to the tested materials.
The aim of the invention is achieved by the following technical scheme:
A high frequency dynamic triaxial test system for determining dynamic response of frozen and crushed materials, comprising a mainframe frame, further comprising:
The low-temperature pressure chamber is detachably arranged at the top of the main machine frame, the low-temperature heat exchange device is arranged in the low-temperature pressure chamber, and the refrigerating device is connected with the low-temperature heat exchange device; the axial force hydraulic loading device is arranged at the bottom of the frame main machine frame and is connected with the low-temperature pressure chamber through an axial force transmission structure;
The volume pressure controller is connected with the low-temperature pressure chamber and is used for applying confining pressure and back pressure to the sample; the system comprises a data acquisition system and a control system, wherein the data acquisition system is used for acquiring temperature, deformation and stress data of a sample, and the control system is used for summarizing the data acquired by the data acquisition system and controlling the application of the temperature, confining pressure, axial force and axial load of the sample; and the hydraulic station is used for providing hydraulic pressure for the axial force hydraulic loading device.
Further, the top of the host frame is provided with a metal pedestal and an electric lifting assembly, the low-temperature pressure chamber can be detachably arranged on the metal pedestal, and the electric lifting assembly can drive the low-temperature pressure chamber to lift.
Further, the axial force hydraulic loading device comprises an electrohydraulic servo valve, an energy accumulator and a loading rod, the loading rod is connected to the low-temperature pressure chamber through an axial force transmission structure, the loading rod is electrically connected with the control system, the electrohydraulic servo valve is respectively connected with the energy accumulator and the loading rod through hydraulic pipes, the electrohydraulic servo valve and the energy accumulator are connected to a hydraulic station through hydraulic pipes, and the hydraulic pipes are provided with hydraulic pipe valves.
Further, two electrohydraulic servo valves and two accumulators are arranged, and the electrohydraulic servo valves and the accumulators are connected in one-to-one correspondence.
Further, the bottom of the low-temperature pressure chamber can be detachably provided with a pressure balance cylinder, the pressure balance cylinder can be detachably arranged on the metal pedestal, the pressure balance cylinder comprises an upper chamber and a lower chamber, the upper chamber is communicated with the atmosphere, and the lower chamber is communicated with the low-temperature pressure chamber.
Further, a pressure sensor is arranged at the top of the low-temperature pressure chamber and is electrically connected with the data acquisition system.
Further, a temperature sensor is arranged in the metal pedestal and is electrically connected with the data acquisition system.
Further, a displacement sensor is arranged at the bottom of the loading rod and is electrically connected with the data acquisition system.
Further, the low-temperature heat exchange device comprises a flexible heat preservation sleeve and a temperature control circulating pipeline arranged in the flexible heat preservation sleeve, and the refrigerating device is communicated with the temperature control circulating pipeline and is electrically connected with the control system.
Compared with the prior art, the invention has the following beneficial effects:
1. The temperature range which can be simulated by the invention is between minus 30 ℃ and +65 ℃, and the freeze-thawing cycle test can be carried out under the condition of applying confining pressure, so that the invention can be used for researching the dynamic response of the broken materials with different temperatures under the action of high-frequency dynamic load, and the research on the dynamic response of the frozen broken materials is realized.
2. The invention can simulate the broken materials under the frozen state and under the action of high-frequency dynamic load, the loading frequency of 100 Hz at maximum provides more frequency choices, and the influence of high-frequency dynamic on the fluctuation of confining pressure can be reduced to a great extent by arranging the pressure balance cylinder.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the axial force hydraulic loading device of the present invention;
FIG. 3 is a schematic diagram of the low temperature pressure chamber and the pressure balance cylinder according to the present invention.
In the figure: 1. a host frame; 2. a low temperature pressure chamber; 3. an axial force hydraulic loading device; 4. a low temperature heat exchange device; 5. a volumetric pressure controller; 6. a data acquisition system; 7. a control system; 8. a hydraulic station; 9. a metal pedestal; 10. an axial force transmission structure; 11. a hydraulic pipe valve; 12. an accumulator; 13. a loading rod; 14. a displacement sensor; 15. a pressure balance cylinder; 16. a refrigerating device, 17, and an electric lifting assembly; 18. a pressure sensor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
As shown in fig. 1 and 2, a high-frequency dynamic triaxial test system for measuring the dynamic response of frozen and broken materials comprises a main machine frame 1, a low-temperature pressure chamber 2, a low-temperature heat exchange device 4, a refrigerating device 16, an axial force hydraulic loading device 3, a volume pressure controller 5, a data acquisition system 6, a control system 7 and a hydraulic station 8. The data acquisition system 6 is electrically connected with the control system 7, the data acquisition system 6 is used for acquiring temperature, deformation and stress data of the sample, and the control system 7 is used for summarizing the data acquired by the data acquisition system and controlling the application of the temperature, confining pressure, axial force and axial load of the sample; the hydraulic station 8 is used to supply hydraulic pressure to the axial force hydraulic loading device 3.
Install metal pedestal 9 and electric lift subassembly 17 at host frame 1 top, metal pedestal 9 is fixed on host frame 1, low temperature pressure chamber 2 passes through connecting piece detachable mounting such as bolt on metal pedestal 9, electric lift subassembly 17 can drive low temperature pressure chamber 2 and go up and down, and then be convenient for install the sample, low temperature heat transfer device 4 installs in low temperature pressure chamber 2, refrigerating plant 16 connects in low temperature heat transfer device 4, axial force hydraulic loading device 3 is fixed in host frame 1 bottom and connects in low temperature pressure chamber 2 through axial force transmission structure 10, volume pressure controller 5 connects in low temperature pressure chamber 2. Specifically, in the test, after the mounting bolts of the low-temperature pressure chamber 2 are disassembled, the low-temperature pressure chamber 2 is lifted up through the electric lifting assembly 17, so that a sample can be placed in the low-temperature pressure chamber 2, and then the low-temperature pressure chamber 2 is lowered down through the electric lifting assembly 17 and the low-temperature pressure chamber 2 is fixed; a biasing force can be applied to the sample by the axial force hydraulic loading device 3; the temperature of the sample can be controlled by the low-temperature heat exchange device 4; the volume pressure controller 5 can inject airless water into the low-temperature pressure chamber 2 to apply confining pressure to the sample, and can inject airless water into the sample to apply back pressure to the sample.
As shown in fig. 2, the axial force hydraulic loading device 3 comprises an electrohydraulic servo valve, an energy accumulator 12 and a loading rod 13, the loading rod 13 is connected with the low-temperature pressure chamber 2 through an axial force transmission structure 10, the electrohydraulic servo valve is respectively connected with the energy accumulator 12 and the loading rod 13 through hydraulic pipes, the electrohydraulic servo valve and the energy accumulator 12 are connected with the hydraulic station 8 through hydraulic pipes, and the hydraulic pipes are provided with hydraulic pipe valves 11. After the hydraulic pipe valve 11 is opened, the hydraulic station 8 conveys hydraulic oil through the hydraulic pipe, so that the hydraulic oil enters the loading rod 13 through the electrohydraulic servo valve and the energy accumulator 12, the loading rod 13 is further controlled to move up and down, and when the loading rod 13 moves up, the axial load is upwards transmitted to the sample through the axial force transmission structure 10, so that axial force loading is realized. Preferably, two electrohydraulic servo valves and two accumulators 12 are arranged, the electrohydraulic servo valves are connected with the accumulators 12 in a one-to-one correspondence manner, further fine control and differential control of the two accumulators 12 can be achieved, dynamic loading of forces and displacements of different sine waves, triangular waves, square waves or custom waveforms is achieved, and the control system 7 is combined to achieve self-adaptive rigidity control loading of samples with different rigidities. In addition, a displacement sensor 14 is further installed at the bottom of the loading rod 13, the displacement sensor 14 is electrically connected to the data acquisition system 6, the data acquisition system 6 monitors and data acquires the axial strain of the sample through the displacement sensor 14, the loading rod 13 is electrically connected to the control system 7, and the control system 7 adjusts the axial load applied by the loading rod 13 according to the strain data acquired by the data acquisition system 6.
The axial force hydraulic loading device 3 can apply a load of 0-25 KN and can apply a dynamic load of not more than 100 Hz at maximum. As shown in fig. 3, a pressure sensor 18 is arranged at the top of the low-temperature pressure chamber 2, the pressure sensor is electrically connected to the data acquisition system 6, the data acquisition system 6 monitors and data-acquires the axial force applied by the loading rod 13 through the pressure sensor 18, the control system 7 performs dynamic force control on the loading rod 13 according to the axial force data acquired by the data acquisition system 6, the dynamic force control precision is one thousandth of the full range of the pressure sensor 18, the maximum displacement of the stroke is not more than 100 mm, and further, UU, CU and CD standard triaxial test can be performed.
The low-temperature heat exchange device 4 is a prior art device and is used for carrying out heat exchange with a sample so as to achieve temperature regulation of the sample, the low-temperature heat exchange device 4 comprises a flexible heat preservation sleeve and a temperature control circulation pipeline arranged in the flexible protective sleeve, the temperature control circulation pipeline is communicated with the refrigerating device 16, and an ultralow-viscosity oil bath is arranged in the temperature control circulation pipeline. The temperature sensor is arranged in the metal pedestal 9 and is electrically connected with the data acquisition system 6, the refrigerating device 16 is electrically connected with the control system 7, the data acquisition system 6 monitors and acquires the temperature of a sample through the temperature sensor, the control system 7 adjusts the temperature of an oil bath flowing out of the refrigerating device 16 through temperature data acquired by the data acquisition system 6, and then adjusts the temperature of liquid in the low-temperature heat exchange device 4 to change at-30-60 ℃, so that the temperature of the sample is controlled, and the temperature fluctuation range is not more than 0.1 ℃. In addition, the confining pressure and the temperature control can be simultaneously applied to the sample, the confining pressure applied to the sample can be simultaneously controlled by using the volume pressure controller 5, and the dynamic load with the frequency smaller than 100 Hz can be applied to the sample by combining the axial force hydraulic loading device 3, so that the freezing and thawing cycle test can be performed while the confining pressure is applied to the sample, and the dynamic characteristic of the sample can be measured in the freezing and thawing cycle test.
The refrigeration unit 16 is a water bath temperature control system, which belongs to the existing equipment, is placed on the ground near the loading frame, and is used for providing low-temperature confining oil for controlling the temperature of the sample. The refrigerating device 16 is controlled by the control system 7 and is connected with the low-temperature heat exchange device 4 in the low-temperature pressure chamber 2 through a pipeline and a valve, and the valve is required to be kept open in the experiment, so that the oil with the specified temperature in the refrigerating device 16 can freely enter or flow out of the low-temperature heat exchange device 4 under the control of the control system 7, and further the temperature control of the sample is realized in a heat exchange mode. The liquid medium in the cooling device 16 may be replaced with airless water to be suitable for loading the sample at 0 c or higher.
The control precision of the volume pressure controller 5 is not lower than one ten thousandth, the maximum flow is 500mm 3/s, the volume is 200ml, the volume resolution is not lower than 0.0625mm 3, the pressure resolution is not lower than 0.1kPa, the volume pressure controller 5 is electrically connected with the control system 7, software for controlling the volume pressure controller 5 is provided, and then the control system 7 injects airless water into the low-temperature pressure chamber 2 or the inside of a sample through controlling the volume pressure controller 5 so as to apply confining pressure or back pressure, and the volume pressure controller 5 can acquire data of transmission pressure, liquid volume and the like in real time and support providing driving.
As shown in fig. 3, the bottom of the low-temperature pressure chamber 2 is detachably connected with a pressure balance cylinder 15 through a connecting piece such as a bolt, the pressure balance cylinder 15 is detachably mounted on the metal pedestal 9 through a connecting piece such as a bolt, the pressure balance cylinder 15 comprises an upper chamber and a lower chamber, the upper chamber is communicated with the atmosphere, and the lower chamber is communicated with the interior of the low-temperature pressure chamber 2. The pressure balance cylinder 15 can automatically compensate the influence of the vibration of the metal pedestal 9 on the confining pressure, specifically, when the hydraulic cylinder acts upwards, the loading rod 13 loads upwards, if the pressure balance cylinder 15 does not exist, the pressure in the low-temperature pressure chamber 2 can be increased due to the fact that liquid or gas is extruded by the loading rod 13, the pressure balance cylinder 15 is added, the low-temperature pressure chamber 2 is connected with the lower chamber of the pressure balance cylinder 15, the upper chamber of the pressure balance cylinder 15 is open to the atmosphere, the pressure change in the low-temperature pressure chamber 2 caused by loading can enter the lower chamber of the pressure balance cylinder 15 to balance, and the sum of the volumes of the low-temperature pressure chamber 2 and the pressure balance cylinder 15 is kept unchanged under dynamic loading so as to maintain the pressure in the low-temperature pressure chamber 2 unchanged, and further offset the influence of the expansion and contraction of the loading rod 13 on the internal pressure of the low-temperature pressure chamber 2.
The hydraulic station 8 is controlled by the control system 7, wherein the hydraulic station 8 mainly comprises an oil tank and a motor, the working pressure of the hydraulic station 8 is 21MPa, the oil tank is 200L, the power of the motor is 11kW, a 10L high-pressure end energy accumulator is additionally arranged, the cooling system of the hydraulic station 8 adopts air cooling and water cooling mixed cooling, and the energy consumption is saved; the hydraulic station 8 is internally provided with related sensors for monitoring and collecting data of the pressure and the temperature of the hydraulic station, and each sensor is connected with the control system 7, so that the collected data can be summarized and output to the control system 7 for regulation and control. The control system 7 is provided with 8 channels for acquisition, the gain of each channel is programmable, the maximum acquisition frequency is 10kHz, and meanwhile, the start and stop of the hydraulic station 8 can be controlled. The more specific structural composition and working principle of the hydraulic station 8 and the control system 7 are prior art and will not be described in detail here.
The data acquisition system 6 is equipped with 7 controllers with 8 channels of acquisition, each channel gain being programmable, with a maximum acquisition frequency of 10kHz. According to the invention, the axial force hydraulic loading device 3 and the volume pressure controller 5 can be mutually communicated through the data acquisition system 6 and the control system 7, the coupling control of axial and confining pressure is carried out, the coupling control frequency is 20Hz, and different waveforms with the maximum frequency of 100Hz can be input, so that a high-frequency dynamic stress path is realized.
When the high-frequency dynamic triaxial test system for measuring the dynamic response of frozen and crushed materials is used for testing, the test steps are as follows:
Step S1, starting a data acquisition system 6 and a control system 7, and then starting a hydraulic station 8, a shaft force hydraulic loading device 3, a volume pressure controller 5 and an electric lifting assembly 17 in sequence, wherein the data acquisition system 6, the control system 7 and the electric lifting assembly 17 are connected for communication.
And S2, installing the low-temperature heat exchange device 4, the low-temperature pressure chamber 2 and the pressure balance cylinder 15, placing a sample in the low-temperature pressure chamber 2, and adjusting the axial force transmission structure 10 to be in contact with the sample.
And step S3, confirming that the pipelines of the axial force hydraulic loading device 3, the low-temperature heat exchange device 4, the hydraulic station 8 and the like are connected correctly, and setting sampling parameters for measuring each sensor on the data acquisition system 6 and the control system 7.
S4, adjusting a valve, and injecting airless water in the volume pressure controller 5 into the low-temperature pressure chamber 2 to ensure that the confining pressure water used for loading in the subsequent test is sufficient; the adjusting valve is communicated with the pressure balance cylinder 15 and the low-temperature pressure chamber 2.
And S5, adjusting a valve, injecting oil in the refrigerating device 16 into the low-temperature heat exchange device 4, and setting temperature control parameters.
And S6, after the sample reaches the set temperature and the confining pressure, starting the axial force hydraulic loading device 3 to apply dynamic load to the sample in the low-temperature heat exchange device 4, and performing a dynamic triaxial test.
And S7, after the test is completed, storing the values of each sensor in the test process on the control system 7, regulating the volume pressure controller 5 to unload the confining pressure, regulating the low-temperature heat exchange device 4 to enable the oil to flow back to the refrigerating device 16, unloading the low-temperature pressure chamber 2, and unloading the sample to complete the test.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A high frequency dynamic triaxial test system for determining dynamic response of frozen and broken materials, comprising a main frame (1), characterized by further comprising:
The low-temperature pressure chamber (2), the low-temperature heat exchange device (4) and the refrigerating device (16), wherein the low-temperature pressure chamber (2) is detachably arranged at the top of the main frame (1), the low-temperature heat exchange device (4) is arranged in the low-temperature pressure chamber (2), and the refrigerating device (16) is connected with the low-temperature heat exchange device (4);
The axial force hydraulic loading device (3), the axial force hydraulic loading device (3) is arranged at the bottom of the main frame (1) of the rack and is connected with the low-temperature pressure chamber (2) through the axial force transmission structure (10);
the volume pressure controller (5), the volume pressure controller (5) is connected with the low-temperature pressure chamber (2), the volume pressure controller (5) is used for applying confining pressure and back pressure to the sample;
The system comprises a data acquisition system (6) and a control system (7), wherein the data acquisition system (6) is used for acquiring temperature, deformation and stress data of a sample, and the control system (7) is used for summarizing the data acquired by the data acquisition system (6) and controlling the application of the temperature, confining pressure, axial force and axial load of the sample;
And a hydraulic station (8), wherein the hydraulic station (8) is used for providing hydraulic pressure for the axial force hydraulic loading device (3).
2. The high frequency dynamic triaxial test system for measuring dynamic response of frozen crushed material according to claim 1, characterized in that: the top of the host frame (1) is provided with a metal pedestal (9) and an electric lifting assembly (17), the low-temperature pressure chamber (2) is detachably arranged on the metal pedestal (9), and the electric lifting assembly (17) can drive the low-temperature pressure chamber (2) to lift.
3. The high frequency dynamic triaxial test system for measuring dynamic response of frozen crushed material according to claim 1, characterized in that: the axial force hydraulic loading device (3) comprises an electrohydraulic servo valve, an energy accumulator (12) and a loading rod (13), wherein the loading rod (13) is connected to the low-temperature pressure chamber (2) through an axial force transmission structure (10), the loading rod (13) is electrically connected with the control system (7), the electrohydraulic servo valve is respectively connected with the energy accumulator (12) and the loading rod (13) through hydraulic pipes, the electrohydraulic servo valve and the energy accumulator (12) are connected with a hydraulic station (8) through hydraulic pipes, and hydraulic pipe valves (11) are arranged on the hydraulic pipes.
4. A high frequency dynamic triaxial test system for determining dynamic response of frozen crushed material according to claim 3, characterized in that: the electro-hydraulic servo valves and the energy accumulator (12) are respectively provided with two, and the electro-hydraulic servo valves are connected with the energy accumulator (12) in a one-to-one correspondence manner.
5. The high frequency dynamic triaxial test system for measuring dynamic response of frozen crushed material according to claim 1, characterized in that: the bottom of low temperature pressure chamber (2) can be dismantled and be equipped with pressure balance cylinder (15), and pressure balance cylinder (15) can be dismantled and locate on metal pedestal (9), and pressure balance cylinder (15) are including last cavity and lower cavity, go up the cavity and communicate with the atmosphere, and lower cavity communicates with low temperature pressure chamber (2) in.
6. The high frequency dynamic triaxial test system for measuring dynamic response of frozen crushed material according to claim 1, characterized in that: the top of the low-temperature pressure chamber (2) is provided with a pressure sensor (18), and the pressure sensor (18) is electrically connected with the data acquisition system (6).
7. The high frequency dynamic triaxial test system for measuring dynamic response of frozen crushed material according to claim 2, characterized in that: a temperature sensor is arranged in the metal pedestal (9) and is electrically connected with the data acquisition system (6).
8. A high frequency dynamic triaxial test system for determining dynamic response of frozen crushed material according to claim 3, characterized in that: the bottom of the loading rod (13) is provided with a displacement sensor (14), and the displacement sensor (14) is electrically connected with the data acquisition system (6).
9. The high frequency dynamic triaxial test system for measuring dynamic response of frozen crushed material according to claim 1, characterized in that: the low-temperature heat exchange device (4) comprises a flexible heat preservation sleeve and a temperature control circulating pipeline arranged in the flexible heat preservation sleeve, and the refrigerating device (16) is communicated with the temperature control circulating pipeline and is electrically connected with the control system (7).
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636222Y (en) * | 2003-07-14 | 2004-08-25 | 中国科学院力学研究所 | Flexible boundary loading experiment machine for broken rock and soil compressing experiment |
| CN107036903A (en) * | 2017-05-04 | 2017-08-11 | 中国矿业大学(北京) | The axle of energetic disturbance low temperature rock three adds unloading rheometer and test method |
| CN107228794A (en) * | 2017-06-14 | 2017-10-03 | 哈尔滨工业大学深圳研究生院 | Drying and watering cycle unsaturated soil triaxial apparatus based on temperature control |
| CN107782634A (en) * | 2017-09-19 | 2018-03-09 | 太原理工大学 | The axle dynamic shearing seepage flow of microcomputer controlled electro-hydraulic servo rock three couples multifunction test device |
| CN108007787A (en) * | 2017-12-29 | 2018-05-08 | 中国科学院武汉岩土力学研究所 | Balancing gate pit and sound state triaxial test system |
| CN108051308A (en) * | 2017-12-29 | 2018-05-18 | 成都东华卓越科技有限公司 | Sound state triaxial test system |
| CN108414418A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of three-axis penetration rate test method |
| CN109187204A (en) * | 2018-08-03 | 2019-01-11 | 广西大学 | A kind of experimental rig for simulating pile-soil interaction when vertically recycling load-bearing |
| CN109900548A (en) * | 2019-03-22 | 2019-06-18 | 崔凯 | A kind of low temperature frozen soil triaxial apparatus |
| CN111122350A (en) * | 2020-01-03 | 2020-05-08 | 同济大学 | Triaxial apparatus for synchronously loading high-frequency cyclic load under static load |
| CN113109161A (en) * | 2021-04-08 | 2021-07-13 | 长沙理工大学 | Self-walking loading device capable of bearing loading counter force by using balance weight and control system |
| CN115078139A (en) * | 2022-06-28 | 2022-09-20 | 西南交通大学 | In-situ three-dimensional imaging fatigue testing machine and testing method in extremely low temperature environment |
-
2024
- 2024-04-15 CN CN202410449601.4A patent/CN118050244B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2636222Y (en) * | 2003-07-14 | 2004-08-25 | 中国科学院力学研究所 | Flexible boundary loading experiment machine for broken rock and soil compressing experiment |
| CN107036903A (en) * | 2017-05-04 | 2017-08-11 | 中国矿业大学(北京) | The axle of energetic disturbance low temperature rock three adds unloading rheometer and test method |
| CN107228794A (en) * | 2017-06-14 | 2017-10-03 | 哈尔滨工业大学深圳研究生院 | Drying and watering cycle unsaturated soil triaxial apparatus based on temperature control |
| CN107782634A (en) * | 2017-09-19 | 2018-03-09 | 太原理工大学 | The axle dynamic shearing seepage flow of microcomputer controlled electro-hydraulic servo rock three couples multifunction test device |
| CN108007787A (en) * | 2017-12-29 | 2018-05-08 | 中国科学院武汉岩土力学研究所 | Balancing gate pit and sound state triaxial test system |
| CN108051308A (en) * | 2017-12-29 | 2018-05-18 | 成都东华卓越科技有限公司 | Sound state triaxial test system |
| CN108414418A (en) * | 2018-01-31 | 2018-08-17 | 中国矿业大学 | A kind of three-axis penetration rate test method |
| CN109187204A (en) * | 2018-08-03 | 2019-01-11 | 广西大学 | A kind of experimental rig for simulating pile-soil interaction when vertically recycling load-bearing |
| CN109900548A (en) * | 2019-03-22 | 2019-06-18 | 崔凯 | A kind of low temperature frozen soil triaxial apparatus |
| CN111122350A (en) * | 2020-01-03 | 2020-05-08 | 同济大学 | Triaxial apparatus for synchronously loading high-frequency cyclic load under static load |
| CN113109161A (en) * | 2021-04-08 | 2021-07-13 | 长沙理工大学 | Self-walking loading device capable of bearing loading counter force by using balance weight and control system |
| CN115078139A (en) * | 2022-06-28 | 2022-09-20 | 西南交通大学 | In-situ three-dimensional imaging fatigue testing machine and testing method in extremely low temperature environment |
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