CN109187168B - Stable and accurate temperature control anisotropic resonance column system and method - Google Patents
Stable and accurate temperature control anisotropic resonance column system and method Download PDFInfo
- Publication number
- CN109187168B CN109187168B CN201811251153.8A CN201811251153A CN109187168B CN 109187168 B CN109187168 B CN 109187168B CN 201811251153 A CN201811251153 A CN 201811251153A CN 109187168 B CN109187168 B CN 109187168B
- Authority
- CN
- China
- Prior art keywords
- pressure chamber
- temperature
- temperature control
- sample
- control pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 23
- 230000005284 excitation Effects 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 88
- 239000003507 refrigerant Substances 0.000 claims description 61
- 239000011148 porous material Substances 0.000 claims description 23
- 238000012544 monitoring process Methods 0.000 claims description 16
- 230000001133 acceleration Effects 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 15
- 238000007596 consolidation process Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 10
- 239000004575 stone Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000079 presaturation Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 46
- 230000008859 change Effects 0.000 abstract description 7
- 239000011343 solid material Substances 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 5
- 239000004816 latex Substances 0.000 description 4
- 229920000126 latex Polymers 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 4
- 230000002277 temperature effect Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of testing the strength characteristics of solid materials by using mechanical stress, and discloses a stable and accurate temperature control anisotropic resonance column system and a method, wherein the system comprises the following steps: the device comprises a temperature control pressure chamber part, a torsional excitation part, an axial loading part, a temperature and signal acquisition and control part and an auxiliary equipment part. The invention prevents the eccentricity of the sample in torsional excitation, and carries out back pressure saturation on original soil or remolded soil so as to lead the sample to be completely saturated; numerical values of all sensors are digitally displayed by utilizing a software program, and the axial driver, the torsion driver and the temperature automatic regulator are accurately and effectively controlled to reach test target values; the device can work normally at the ambient temperature of-20 ℃ to 90 ℃, the liquid pressure and the liquid volume change can be accurately measured and controlled, and the gas pressure change can be accurately measured and controlled.
Description
Technical Field
The invention belongs to the field of environmental geotechnical and energy geotechnical engineering, and particularly relates to an anisotropic resonance column system and method for stable and accurate temperature control. The method is mainly applied to measuring the small strain dynamic characteristics of the soil body in each stress state under the action of the temperature effect in the fields of environmental geotechnical and energy geotechnical engineering.
Background
When buildings such as bridges and houses on the ground are subjected to earthquake, traffic load vibration or mechanical vibration, the soil and the building systems are subjected to vibration with different amplitudes and frequencies, and when the resonance frequency of the soil and the building systems falls in the externally loaded frequency range, resonance occurs, so that the building is greatly damaged. The dynamic property of each strain range of the soil is researched, and the method has extremely important significance for shock prevention, shock absorption and disaster resistance.
The resonance column is an important test device for testing dynamic characteristic parameters of various strain ranges of soil, and is used for measuring and analyzing the dynamic property of the soil by applying loads with different frequencies and amplitudes to the soil and measuring the property from small strain to medium strain of the dynamic soil. The theoretical basis of the resonance column test is wave propagation theory-wave theory in the soil body. The sample of a typical resonance column is a solid cylindrical soil body, the bottom is fixed on a base, a rigid body mass block is added to the top, and the resonance column can swing freely in the horizontal rotation direction, namely, one end is fixed, and the other end is free. The sample is rotationally vibrated by applying a torsional force to the sample through the mass.
At present, a resonance column device capable of stabilizing and accurately controlling temperature and various soil small strain dynamic parameters is not available. The prior CN105928774A discloses a soil sample resonance column device, which comprises a base, a mass block, a vertical displacement sensor, a steel rope, a pulley block and a balance block; the mass block consists of a cross, magnets, an accelerometer and a balancing weight, wherein the 4 ends of the cross are provided with strip magnets, and the two ends of each strip magnet are sleeved with coils; the accelerometer and the balancing weight are respectively arranged at the radial edges of the cross, and the accelerometer and the balancing weight are equal in weight, so that the mass block is balanced. The bottom of soil sample is fixed on the base, and the top is connected with the quality piece center. The balance blocks with equal weight are connected with the mass blocks through steel ropes and are balanced through pulley blocks, so that the influence of the mass blocks on the soil sample in the testing process is reduced. When current flows through the coil, the driving mass block makes the soil sample twist, the controller detects an angular acceleration signal of the soil sample twist through the accelerometer, and the resonance frequency and the damping ratio of the soil sample are finally obtained through signal processing. The weight of the mass block is counteracted through the arrangement of the pulley and the balance block, so that the influence of the mass block on a soil sample in the testing process is reduced, and the measuring precision and accuracy of the resonance column are greatly improved.
CN106094915A provides a shipborne resonance column instrument, the invention relates to a shipborne resonance column instrument, which is composed of a torsional vibration electromagnetic driving device, a longitudinal vibration device, a balance base and a detection device, wherein the torsional vibration electromagnetic driving device is composed of four torsional vibration magnets respectively arranged in four driving coils and respectively fixed on four endpoints of a positive cross swing arm through screws, the four driving coils are respectively arranged in four coil sleeves, the four driving coils are respectively connected with a power supply through cables to form four sets of torsional vibration electromagnetic driving devices, and the four sets of torsional vibration electromagnetic driving devices are respectively fixed on a supporting inner cylinder in equal angles. The invention solves the problem that the existing resonance column instrument influences the test precision due to the swinging of the experiment bench, so that the resonance column instrument widely applied to rock-soil test can be applied to a marine exploration ship, and the collected sediment sample can be timely detected and analyzed without being taken to a land laboratory for detection and analysis. And the carrying and the storage are omitted, and the manpower, material resources and time are saved.
In addition, CN106094915A discloses an energy injection type virtual mass resonance column control system and control method, the system includes a mass block and a control device, the bottom end of the soil sample is fixed on the base, and the top end is connected with the center of the mass block. The mass block comprises a cross, a connecting piece, 4 bar magnets, an accelerometer and a balancing weight; the control device comprises a singlechip, a USB interface, an analog-to-digital converter, a digital-to-analog converter, a charge amplifier, a multi-way switch, a programmable gain amplifier, a sampling holder and a power amplifier; the accelerometer, the charge amplifier, the programmable gain amplifier, the sampling retainer and the analog-to-digital converter are connected in sequence and are used for detecting acceleration signals; the digital-analog converter, the power amplifier and the coil are sequentially connected and used for driving the mass block to vibrate the soil sample. The control device is connected with the PC through the USB interface, receives various instructions from the PC, and uploads related data to the PC for displaying real-time display. After the device is electrified and started, the angular acceleration of the mass block is continuously collected, and signals are output to the coil after relevant processing, so that the coil generates a magnetic field, and the soil sample can be moved under the given frequency and the given amplitude without other signal sources.
In summary, the conventional resonant column device has the following problems:
Stable and accurate temperature control in a wide range (-20 ℃ to 90 ℃) cannot be realized.
The soil sample cannot be saturated in the pressure chamber and the volume change of the soil mass cannot be measured.
The soil sample cannot be consolidated unevenly, so that the small strain dynamic characteristic parameters of the anisotropic soil can be measured.
Difficulty and meaning for solving the technical problems:
(1) The existing anisotropic resonance column device cannot realize stable and accurate temperature control in a wide range (-20 ℃ to 90 ℃);
(2) The existing anisotropic resonance column device cannot saturate undisturbed soil or remolded soil.
(3) Some anisotropic resonant column devices are incapable of torsionally exciting isotropic (equally consolidated) or anisotropic (unequally consolidated) consolidated soil samples.
Meaning:
In recent years, in the fields of heat energy storage, nuclear waste disposal, urban heat island effect, explosion soft foundation treatment, cold region moving soil treatment and the like, the research on the temperature effect of a rock-soil body has important theoretical significance and application value, and is an important subject in the fields of environmental rock-soil and energy geotechnical engineering. Aiming at the practical problems in the prior major engineering, an anisotropic resonance column device which is applicable to engineering practice and can be used for stabilizing and controlling the temperature accurately in a wide range (-20 ℃ to 90 ℃) is lacking; there is a lack of a device that can saturate undisturbed or remolded soil, twist excite the isotropic (equal consolidation) or anisotropic (unequal consolidation) consolidated soil sample, and precisely control the test environmental temperature to study the dynamic characteristics of each strain level (0.0001% -0.1%) of the anisotropic consolidation conditioned soil under the environmental temperature effect.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention provides an anisotropic resonance column system and a method for stable and accurate temperature control.
The invention is realized by a stable and accurate temperature controlled anisotropic resonant column system comprising: the device comprises a temperature control pressure chamber part, a torsional excitation part, an axial loading part, a temperature and signal acquisition and control part and an auxiliary equipment part.
The temperature-control pressure chamber section provides a pressure chamber and a temperature-control chamber.
The torsional excitation section applies torsional forced vibration to the specimen in each frequency range.
The axial loading part provides axial stress for the sample, so that anisotropic consolidation of the sample is realized.
The temperature and signal acquisition and control part acquires and controls each driver and each sensor to acquire data according to the test requirement.
Further, the temperature-controlled pressure chamber portion includes: the device comprises a temperature control pressure chamber top cover, a refrigerant channel embedded temperature control pressure chamber cylinder, a temperature control pressure chamber base, a counter-force rod, an axial loading rod positioning ring, a first M10 inner hexagonal screw, an M6 inner hexagonal screw, a ball valve, a hole pressure sensor, a temperature sensor, an upper drainage hole, a lower water inlet hole, an upper exhaust hole and a lower exhaust hole;
The counter-force rod is connected with the temperature-control pressure chamber base in a bottom threaded knob mode, the temperature-control pressure chamber top cover is assembled with the counter-force rod through a first M10 socket head cap screw, the axial loading rod positioning ring is assembled with the temperature-control pressure chamber base through a M6 socket head cap screw, an O-shaped ring is placed in a groove of the temperature-control pressure chamber base for sealing, the refrigerant passage embedded temperature-control pressure chamber cylinder is assembled with the temperature-control pressure chamber base through a M6 socket head cap screw, O-shaped rings with proper sizes are placed in the groove of the temperature-control pressure chamber base and the lateral groove of the temperature-control pressure chamber top cover for sealing, and the temperature sensor is embedded in the temperature-control pressure chamber base;
The embedded temperature control pressure chamber cylinder of the refrigerant channel is formed by nesting two materials, the outer layer is a hollow heat preservation cylinder made of heat preservation materials with certain rigidity, and the inner layer is formed by easily-conducting materials embedded in the refrigerant channel; the upper part and the lower part respectively comprise two refrigerant circulation channel outlets and a refrigerant circulation channel inlet; the bottom of the refrigerant channel embedded temperature control pressure chamber cylinder comprises four first M10 hexagon socket head cap screw preformed holes;
the base of the temperature control pressure chamber is directly connected with the bearing platform of the temperature control chamber, and comprises a lower water inlet hole, a lower exhaust hole and an embedded temperature sensor; the lower part of the lower water inlet hole is connected with a water pressure/volume controller, the upper part of the lower water inlet hole is connected with a double-outer tooth communication, and the lower part of the lower exhaust hole is connected with an air pressure controller;
The bottom of the top cover of the temperature control pressure chamber comprises four counterforce rod embedded holes, and the top of the top cover of the temperature control pressure chamber comprises four first M10 socket head cap screw reserved holes; the upper part of the pore pressure sensor is connected with a communicable sealing plug.
Further, the axial loading portion includes: the device comprises a temperature control pressure chamber bearing platform, an axial driver, an axial load sensor, a linear displacement sensor and an axial loading rod;
the axial driver is connected with the axial loading rod, the axial load sensor is arranged at the middle lower part of the axial loading rod, and the linear displacement sensor is fixed on the axial loading rod through a bracket; the axial driver is directly connected with the bottom of the bearing platform of the temperature control pressure chamber; the upper part of the axial loading rod penetrates through the inner holes of the temperature control pressure chamber base and the axial loading rod positioning ring to enter the temperature control pressure chamber, the outer diameter of the axial loading rod is slightly smaller than the inner hole diameters of the temperature control pressure chamber base and the axial loading rod positioning ring, and O-shaped rings are placed on the inner hole side walls of the temperature control pressure chamber base and the axial loading rod positioning ring for sealing.
Further, the torsion excitation portion includes: the device comprises a torsion driver, a torsion loading shaft, a torque sensor, a torque loading frame, an acceleration sensor and an M6 socket head cap screw;
The torsion driver is connected with the lower part of the top cover of the temperature control pressure chamber through an M6 inner hexagonal screw, the torsion driver is connected with the torsion loading shaft, the torque sensor is arranged in the middle of the torsion loading shaft, and the torsion loading frame is connected with the torsion loading shaft through a threaded knob mode;
the acceleration sensor is assembled with one side of the torsion loading frame, and the weight piece with the same size and weight as the acceleration sensor is placed on the other side of the torsion loading frame.
Further, the temperature and signal acquisition and control section includes: the system comprises a temperature control system, a multichannel signal acquisition monitoring and servo control system, a microcomputer, a refrigerant inlet pipe and a refrigerant outlet pipe;
One end of the refrigerant inlet pipe/refrigerant outlet pipe is connected with a refrigerant outlet and a refrigerant inlet of the temperature control system, the other end is connected with a refrigerant circulation channel inlet and a refrigerant circulation channel outlet of the refrigerant channel embedded temperature control pressure chamber cylinder, and the small computer is connected with the multichannel signal acquisition monitoring and servo control system through a lead;
the temperature control system comprises a circulating bath, a heating/refrigerating unit and a temperature automatic regulator, and is connected with the multichannel signal acquisition monitoring and servo control system through a transmission control line; the multichannel signal acquisition monitoring and servo control system comprises a plurality of signal acquisition ports and a servo controller, wherein the signal acquisition ports are connected with the sensors through signal acquisition lines, and the servo controller is connected with the axial driver, the torsion driver and the temperature automatic regulator through transmission control lines.
Further, the auxiliary device portion includes: a water pressure/volume controller, a pneumatic controller, a sample top cap, a sample base, an upper water pipe and a lower water pipe;
The water pressure/volume connecting controller is connected with the lower water pipe, the air pressure connecting controller is connected with the lower exhaust hole, the sample base is connected with the axial loading rod in a knob mode, and the sample top cap is assembled with the torque loading frame through an M6 inner hexagon screw 35;
one end of the upper water pipe is communicated with the upper water drain hole through a pair of outward teeth, and the other end of the upper water pipe is communicated with the top cap water drain channel of the sample through a pair of outward teeth;
One end of the lower water pipe is communicated with the lower water inlet through the double outward teeth, and the other end is connected with the water draining channel of the sample base through the double outward teeth.
Another object of the present invention is to provide a stable and accurate temperature controlled anisotropic resonance column method of implementing the stable and accurate temperature controlled anisotropic resonance column system, the stable and accurate temperature controlled anisotropic resonance column method comprising the steps of:
Step one, embedding a sample into a blade at the upper part of a sample base; placing filter paper slightly larger than the diameter of the permeable stone at the lower part of the permeable stone at the bottom of the sample top cap, placing the sample top cap at the top of the solid cylindrical sample, and embedding a blade at the bottom of the sample top cap into the top of the solid cylindrical sample; assembling the sample top cap with the torsion loading frame through an M6 inner hexagon screw; one end of the upper water pipe is communicated with the upper water drain hole through the double outward teeth, and the other end of the upper water pipe is communicated with the top cap water drain channel of the sample through the double outward teeth;
Step two, pre-saturating the sample: opening an air pressure controller, applying 30kPa pressure to the inside of a temperature control pressure chamber, then opening a liquid pressure/volume controller, applying 20kPa water pressure to a sample, and exhausting gas from the two-way external teeth communication at the upper part of the pore pressure sensor; the sample was saturated in stages: the two-way external teeth on the upper part of the pore pressure sensor are sealed by an internal tooth seal, the air pressure in the temperature control pressure chamber and the pore water pressure in the sample are increased at the same speed, and the difference between the air pressure and the pore water pressure is kept to be 10kPa until the sample is fully saturated;
Step three, according to the test requirement, increasing the air pressure in the pressure chamber to a certain specific value, and simultaneously controlling the axial driver to increase the axial pressure to a preset value, and carrying out isotropic or anisotropic consolidation on the sample; excitation voltage is applied to the torsion driver, and a resonance column test is started.
Another object of the present invention is to provide an anisotropic resonance column apparatus for performing the stable and accurate temperature control anisotropic resonance column method.
In summary, the invention has the advantages and positive effects that:
the invention can ensure uniform temperature distribution, realize stable and accurate test environment temperature control of wide range (-20 ℃ to 90 ℃), can exert cold and hot circulation effects, can carry out resonance column test on original soil or remolded soil, measure dynamic modulus, dynamic damping, natural frequency and stress-strain relation of the original soil or remolded soil in a wider strain range, and utilize the resonance column to study environment temperature effect, and influence of anisotropic consolidation conditions on small strain dynamic characteristics of soil; the sample may be consolidated isotropically (equal consolidation) or anisotropically (unequal consolidation); the axial and volume changes of the sample can be accurately measured during the consolidation of the sample.
The invention prevents the eccentricity of the sample in torsional excitation, and carries out back pressure saturation on original soil or remolded soil, so that the sample can reach full saturation; the sensors are connected with the signal acquisition box, the electric charge quantity of signals output by the sensors is converted into voltage quantity by the charge amplifier, the voltage quantity is regulated by the programmable gain amplifier, so that the measurement accuracy is further improved, and the analog-to-digital converter is used for converting analog quantity of acceleration signals into digital quantity and sending the digital quantity to the computer for processing and displaying. The axial driver, the torsion driver and the temperature automatic regulator are connected with a computer through a servo controller, the sensors continuously sample signals, then the signals are compared according to axial direction, torsion and temperature values given by a user to obtain error signals, then digital proportion, integral and differential (PID) adjustment is respectively carried out on the error signals, the digital signals are converted into analog vibration signals through a digital-to-analog converter, and the analog vibration signals are passed through the servo controller. The axial driver, the torsion driver and the temperature automatic regulator are accurately and effectively controlled to reach the test target value. The device can work normally at the ambient temperature of-20 ℃ to 90 ℃, the liquid pressure and the liquid volume change can be accurately measured and controlled, and the gas pressure change can be accurately measured and controlled.
Drawings
FIG. 1 is a schematic diagram of an anisotropic resonant column system with stable and precise temperature control according to an embodiment of the present invention;
In the figure: 1. a temperature-controlled pressure chamber top cover; 2. a ball valve; 3. an upper exhaust hole; 4. a first M10 socket head cap screw; 5. a torsion driver; 6. twisting the loading shaft; 7. a refrigerant circulation channel outlet; 8. a torque sensor; 9. an acceleration sensor; 10. a torque loading frame; 11. a sample top cap; 12. a reaction force lever; 13. a sample; 14. a latex film; 15. a refrigerant channel embedded temperature control pressure chamber cylinder; 16. a refrigerant circulation channel inlet; 17. a second M10 socket head cap screw; 18. an axial loading rod positioning ring; 19. a lower water inlet hole; 20. a temperature-controlled pressure chamber base; 21. a water pressure/volume controller; 22. a linear displacement sensor; 23. an axial force load sensor; 24. an axial loading rod; 25. an axial driver; 26. a temperature control pressure chamber bearing platform; 27. a refrigerant inlet pipe; 28. a refrigerant discharge pipe; 29. a temperature sensor; 30. the air pressure controller is connected; 31. a small computer; 32. a lower water pipe; 33. a sample base; 34. a water pipe is arranged on the upper part; 35. m6 inner hexagon screw; 36. an upper drain hole; 37. a pore pressure sensor; 38. the multichannel signal acquisition monitoring and servo control system; 39. a lower exhaust hole; 40. a temperature control system.
FIG. 2 is a flow chart of a method for stabilizing and precisely controlling temperature of an anisotropic resonant column according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention can normally work at the ambient temperature of-20 ℃ to 90 ℃, accurately measure and control the liquid pressure and the liquid volume change, and accurately measure and control the gas pressure change.
The principle of application of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the anisotropic resonant column system for stable and precise temperature control according to the embodiment of the present invention includes:
The temperature-control pressure chamber top cover 1, the ball valve 2, the upper exhaust hole 3, the first M10 inner hexagonal screw 4, the torsion driver 5, the torsion loading shaft 6, the refrigerant circulation channel outlet 7, the torque sensor 8, the acceleration sensor 9, the torque loading frame 10, the sample top cover 11, the counter force rod 12, the sample 13, the latex film 14, the refrigerant channel embedded temperature-control pressure chamber cylinder 15, the refrigerant circulation channel inlet 16, the second M10 inner hexagonal screw 17, the axial loading rod positioning ring 18, the lower water inlet 19, the temperature-control pressure chamber base 20, the continuous water pressure/volume controller 21, the linear displacement sensor 22, the axial force load sensor 23, the axial loading rod 24, the axial driver 25, the temperature-control pressure chamber bearing platform 26, the refrigerant inlet pipe 27, the refrigerant discharge pipe 28, the temperature sensor 29, the continuous air pressure controller 30, the mini-computer 31, the lower water-through pipe 32, the sample base 33, the upper water-through pipe 34, the M6 inner hexagonal screw 35, the upper water-drainage hole 36, the hole pressure sensor 37, the multi-channel signal monitoring and control system 38, the lower exhaust hole 40 and the temperature-control system 40.
The main equipment characteristics of the precisely controlled temperature control resonance column system comprise five parts: the device comprises a temperature control pressure chamber part, a torsional excitation part, an axial loading part, a temperature and signal acquisition and control part and an auxiliary equipment part.
The temperature-control pressure chamber part mainly comprises: the device comprises a temperature control pressure chamber top cover 1, a refrigerant channel embedded temperature control pressure chamber cylinder 15, a temperature control pressure chamber base 20, a counter force rod 12, an axial loading rod positioning ring 18, a first M10 inner hexagonal screw 4, a M6 inner hexagonal screw 35, a ball valve 2, a hole pressure sensor 37, a temperature sensor 29, an upper drain hole 36, a lower water inlet hole 19, an upper drain hole 3 and a lower drain hole 39.
The counter-force rod 12 is connected with the temperature control pressure chamber base 20 through a bottom thread knob mode, the temperature control pressure chamber top cover 1 is assembled with the counter-force rod 12 through a first M10 socket head cap screw 4, the axial loading rod positioning ring 18 is assembled with the temperature control pressure chamber base 20 through a M6 socket head cap screw 35, a 0-shaped ring is placed in a groove of the temperature control pressure chamber base 20 for sealing, the refrigerant channel embedded temperature control pressure chamber cylinder 15 is assembled with the temperature control pressure chamber base 20 through a M6 socket head cap screw 35, a 0-shaped ring with proper size is placed in the groove of the temperature control pressure chamber base 20 and the lateral groove of the temperature control pressure chamber top cover 1 for sealing, and the temperature sensor 29 is embedded in the temperature control pressure chamber base 20. The refrigerant channel embedded temperature control pressure chamber cylinder is formed by nesting two materials, the outer layer is a hollow heat preservation cylinder made of heat preservation materials with certain rigidity, and the inner layer is formed by easily conducting materials embedded in the refrigerant channel; the upper part and the lower part respectively comprise two refrigerant circulation channel outlets 7 and a refrigerant circulation channel inlet 16. The inner diameter is slightly larger than the diameter of the top cover 1 of the temperature control pressure chamber; the bottom of the refrigerant channel embedded temperature control pressure chamber cylinder 15 comprises four reserved holes of a first M10 inner hexagon screw 4; the temperature-control pressure chamber base is made of a heat-insulating material with certain rigidity and is directly connected with a temperature-control chamber bearing platform, and the base comprises a lower water inlet hole 19, a lower exhaust hole 39 and an embedded temperature sensor 29; the lower part of the lower water inlet hole 19 is connected with a water pressure/volume controller 21, the upper part of the lower water inlet hole 19 is connected with double outward teeth for communication, and the lower part of the lower exhaust hole 39 is connected with an air pressure controller 30; the temperature-control pressure chamber top cover 1 is made of a heat-insulating material with certain rigidity, and the temperature-control pressure chamber base comprises an upper drain hole 36 and an upper exhaust hole 3. The upper part of the upper drain hole 36 is connected with a hole pressure sensor 37, the lower part of the upper drain hole 36 is connected with double outward teeth for communication, and the upper part of the upper exhaust hole 3 is connected with the ball valve 2. The bottom of the temperature control pressure chamber top cover 1 comprises four counterforce rods 12 embedded holes, and the top of the temperature control pressure chamber top cover 1 comprises four reserved holes of first M10 socket head cap screws 4; the upper part of the pore pressure sensor 37 is connected with a communicable sealing plug.
The axial loading portion mainly includes: the device comprises a temperature control pressure chamber bearing platform 26, an axial driver 25, an axial load sensor 23, a linear displacement sensor 22 and an axial loading rod 24.
The axial driver 25 is connected with the axial loading rod 24, the axial load sensor 23 is assembled at the middle lower part of the axial loading rod 24, the linear displacement sensor 22 is fixed on the axial loading rod 24 through a bracket, and the assembly completes an axial transmission part; the axial driver 25 is directly connected with the bottom of the temperature control pressure chamber bearing platform 26; the upper part of the axial loading rod 24 passes through the inner holes of the temperature control pressure chamber base 20 and the axial loading rod positioning ring 18 to enter the temperature control pressure chamber, the outer diameter of the axial loading rod is slightly smaller than the inner hole diameters of the temperature control pressure chamber base 20 and the axial loading rod positioning ring 18, and a 0-shaped ring is placed on the inner hole side walls of the temperature control pressure chamber base 20 and the axial loading rod positioning ring 18 for sealing.
The torsional excitation portion mainly includes: the torque driver 5, the torque loading shaft 6, the torque sensor 8, the torque loading frame 10, the acceleration sensor 9 and the M6 socket head cap screw 35.
The torsion driver is connected with the lower part of the top cover 1 of the temperature control pressure chamber through an M6 socket head cap screw 35. The torsion driver 5 is connected with the torsion loading shaft 6, the torque sensor 8 is assembled in the middle of the torsion loading shaft 6, and the torsion loading frame 10 is connected with the torsion loading shaft 6 in a threaded knob mode; the acceleration sensor 9 is assembled with one side of the torsion loading frame 10, and the weight piece with the same size and weight as those of the acceleration sensor 9 is arranged on the other side of the torsion loading frame, so that the eccentricity of a sample in torsional excitation is prevented.
The temperature and signal acquisition and control part mainly comprises: a temperature control system 40, a multichannel signal acquisition monitoring and servo control system 38, a microcomputer 31, a refrigerant inlet pipe 27 and a refrigerant outlet pipe 28.
Two refrigerant inlet pipes 27 and two refrigerant outlet pipes 28, one end of each refrigerant inlet pipe 27/each refrigerant outlet pipe 28 is connected with a refrigerant outlet and a refrigerant inlet of a temperature control system 40, the other end is connected with a refrigerant circulation channel inlet 16 and a refrigerant circulation channel outlet 7 of a refrigerant channel embedded temperature control pressure chamber cylinder 15, and a microcomputer 31 is connected with a multichannel signal acquisition monitoring and servo control system 38 through wires; the temperature control system 40 mainly comprises a circulating bath, a heating/refrigerating unit and an automatic temperature regulator, and the temperature control system 40 is connected with the multichannel signal acquisition monitoring and servo control system 38 through a transmission control line; the multi-channel signal acquisition monitoring and servo control system 38 comprises a plurality of signal acquisition ports and a servo controller, wherein the signal acquisition ports are connected with the sensors through signal acquisition lines, and the servo controller is connected with the axial driver 25, the torsion driver 5 and the temperature automatic regulator through transmission control lines.
The auxiliary equipment part mainly comprises: a water pressure/volume controller 21, a pneumatic controller 30, a sample top cap 11, a sample base 33, an upper water pipe 34 and a lower water pipe 32.
The water pressure/volume controller 21 is connected with the lower water pipe 32, the air pressure controller 30 is connected with the lower exhaust hole 39, the sample base 33 is connected with the axial loading rod 24 in a knob mode, and the sample top cap is assembled with the torque loading frame 10 through the M6 inner hexagon screw 35; one end of the upper water pipe 34 is connected with the upper drain hole 36 through double outward tooth communication, and the other end is connected with a drain channel of the sample top cap 11 through double outward tooth communication; one end of the lower water pipe 32 is connected with the lower water inlet 19 through the bi-directional external tooth communication, and the other end is connected with the water discharge channel of the sample base 33 through the bi-directional external tooth communication.
As shown in fig. 2, the method for stabilizing and precisely controlling the temperature of the anisotropic resonant column according to the embodiment of the present invention includes the following steps:
S201: embedding the sample into a blade at the upper part of the sample base; placing filter paper slightly larger than the diameter of the permeable stone at the lower part of the permeable stone at the bottom of the sample top cap, placing the sample top cap at the top of the solid cylindrical sample, and embedding a blade at the bottom of the sample top cap into the top of the solid cylindrical sample; assembling the sample top cap with the torsion loading frame through an M6 inner hexagon screw; one end of the upper water pipe is communicated with the upper water drain hole through the double outward teeth, and the other end of the upper water pipe is communicated with the top cap water drain channel of the sample through the double outward teeth;
S202: presaturation of the sample: opening an air pressure controller, applying 30kPa pressure to the inside of a temperature control pressure chamber, then opening a liquid pressure/volume controller, applying 20kPa water pressure to a sample, and exhausting gas from the two-way external teeth communication at the upper part of the pore pressure sensor; the sample was saturated in stages: the two-way external teeth on the upper part of the pore pressure sensor are sealed by an internal tooth seal, the air pressure in the temperature control pressure chamber and the pore water pressure in the sample are increased at the same speed, and the difference between the air pressure and the pore water pressure is kept to be 10kPa until the sample is fully saturated;
S203: according to the test requirement, increasing the air pressure in the pressure chamber to a certain specific value, and simultaneously controlling the axial driver to increase the axial pressure to a preset value, and carrying out isotropic or anisotropic consolidation on the sample; excitation voltage is applied to the torsion driver, and a resonance column test is started.
The working principle of the invention is as follows: an O-shaped ring is placed in an inner groove of the temperature control pressure chamber base for sealing, and four M6 inner hexagon screws penetrate through M6 inner hexagon screw reserved holes of the axial loading rod positioning ring to be connected with the temperature control pressure chamber base; the sample base is assembled with the top of the axial loading rod in a knob mode; the counter-force rod is connected with the temperature control pressure chamber base in a bottom thread knob mode, and the temperature control pressure chamber top cover is assembled with the counter-force rod through an M10 socket head cap screw; the torsion driver is connected with the lower part of the top cover of the temperature control pressure chamber through an M6 socket head cap screw. Connecting the torsion driver with a torsion loading rod; the torque sensor is arranged in the middle of the torsion loading rod, and then the torsion loading frame is connected with the torsion loading rod in a threaded knob mode; The ball valve is arranged at the upper part of the upper exhaust hole, the hole pressure sensor is arranged at the upper part of the upper drain hole, four double-outward tooth communication devices are respectively arranged at the upper part of the lower water inlet hole, the pore channel at the side part of the sample base, the pore channel at the side part of the sample top cap and the lower part of the upper drain hole; placing filter paper with the diameter slightly larger than that of the permeable stone on the upper part of the permeable stone, then placing a solid cylindrical soil sample on the upper part of the sample base, and then embedding the sample into a blade on the upper part of the sample base; placing filter paper slightly larger than the diameter of the permeable stone at the lower part of the permeable stone at the bottom of the sample top cap, placing the sample top cap at the top of the solid cylindrical sample, and embedding a blade at the bottom of the sample top cap into the top of the solid cylindrical sample; sleeving a latex film on the outer side of the soil sample, and fixing the latex film with the sample base and the sample top cap through an O-shaped ring; Assembling the top cap of the sample by using an M6 inner hexagon screw and a torsion loading frame; one end of the upper water pipe is communicated with the upper water drain hole through the double outward teeth, and the other end of the upper water pipe is communicated with the top cap water drain channel of the sample through the double outward teeth; one end of the lower water pipe is communicated with the lower water drain hole through a pair of outward teeth, and the other end of the lower water pipe is communicated with the water drain channel of the sample base through a pair of outward teeth; each sensor is connected with a signal acquisition port of a multichannel signal acquisition monitoring and servo control system by utilizing a signal acquisition line, an axial driver, a torsion driver and a temperature automatic regulator are connected with a servo controller by utilizing a transmission control line, and the multichannel signal acquisition monitoring and servo control system and the temperature control system are connected with a small computer; A 0-shaped ring is placed in an outer groove of a base of the temperature control pressure chamber, an O-shaped ring is placed in a groove at the side part of a top cover of the temperature control pressure chamber, and four M10 hexagon socket head cap screws penetrate through M10 hexagon socket head cap screw reserved holes of a refrigerant channel embedded temperature control pressure chamber cylinder to be connected with the base of the temperature control pressure chamber; the liquid pressure/volume controller is connected with the lower part of the water inlet hole, and the air pressure controller is connected with the lower part of the lower exhaust hole; closing the ball valve, and removing the inner teeth of the communicable type sealing plug at the upper part of the pore pressure sensor in a sealing way; presaturation of the sample: opening an air pressure controller, applying 30kPa pressure to the inside of a temperature control pressure chamber, then opening a liquid pressure/volume controller, applying 20kPa water pressure to a sample, and exhausting gas from the two-way external teeth communication at the upper part of the pore pressure sensor; The sample was saturated in stages: the two-way external teeth on the upper part of the pore pressure sensor are sealed by an internal tooth seal, the air pressure in the temperature control pressure chamber and the pore water pressure in the sample are increased at the same speed, and the difference between the air pressure and the pore water pressure is kept to be 10kPa until the sample is fully saturated; according to the test requirement, increasing the air pressure in the pressure chamber to a certain specific value, and simultaneously controlling the axial driver to increase the axial pressure to a preset value, and carrying out isotropic or anisotropic consolidation on the sample;
and (3) applying exciting voltage to the torsion driver, changing the vibration frequency until the resonance frequency of the system is measured, then enabling the sample to vibrate freely, and calculating the natural frequency and dynamic shear modulus, the dynamic damping ratio and the dynamic strain amplitude of the sample according to the resonance frequency, the geometric dimension of the sample, the free attenuation data of the sample, the limiting conditions of the end part and the like.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. A stable and accurate temperature controlled anisotropic resonant column method, characterized in that the stable and accurate temperature controlled anisotropic resonant column method comprises:
Embedding the sample into a blade at the upper part of the sample base; placing filter paper slightly larger than the diameter of the permeable stone at the lower part of the permeable stone at the bottom of the sample top cap, placing the sample top cap at the top of the solid cylindrical sample, and embedding a blade at the bottom of the sample top cap into the top of the solid cylindrical sample; assembling the sample top cap with the torsion loading frame through an M6 inner hexagon screw; one end of the upper water pipe is communicated with the upper water drain hole through the double outward teeth, and the other end of the upper water pipe is communicated with the top cap water drain channel of the sample through the double outward teeth;
Presaturation of the sample: opening an air pressure controller, applying 30kPa pressure to the inside of a temperature control pressure chamber, then opening a liquid pressure/volume controller, applying 20kPa water pressure to a sample, and exhausting gas from the two-way external teeth communication at the upper part of the pore pressure sensor; the sample was saturated in stages: the two-way external teeth on the upper part of the pore pressure sensor are sealed by an internal tooth seal, the air pressure in the temperature control pressure chamber and the pore water pressure in the sample are increased at the same speed, and the difference between the air pressure and the pore water pressure is kept to be 10kPa until the sample is fully saturated;
According to the test requirement, increasing the air pressure in the pressure chamber to a certain specific value, and simultaneously controlling the axial driver to increase the axial pressure to a specified value, and carrying out isotropic or anisotropic consolidation on the sample; after consolidation is completed, controlling a temperature automatic regulator to heat or cool the temperature-controlled triaxial pressure chamber according to the requirement, reaching the environment temperature required by the test, applying exciting voltage to the torsion driver after the temperature is stable, and starting the resonance column test;
The stable and accurate temperature control anisotropic resonance column system of the stable and accurate temperature control anisotropic resonance column method comprises: the device comprises a temperature control pressure chamber part, a torsional excitation part, an axial loading part, a temperature and signal acquisition and control part;
The temperature control pressure chamber part is used for providing a pressure chamber and a temperature control chamber;
the torsional excitation part is used for applying torsional forced vibration in various frequency ranges to the sample;
the axial loading part is used for providing axial stress for the sample and realizing anisotropic consolidation of the sample;
The temperature and signal acquisition and control part is used for acquiring and controlling each driver and each sensor to acquire data according to test requirements;
the temperature-controlled pressure chamber portion includes: the device comprises a temperature control pressure chamber top cover, a refrigerant channel embedded temperature control pressure chamber cylinder, a temperature control pressure chamber base, a counter-force rod, an axial loading rod positioning ring, a first M10 inner hexagonal screw, an M6 inner hexagonal screw, a ball valve, a hole pressure sensor, a temperature sensor, an upper drainage hole, a lower water inlet hole, an upper exhaust hole and a lower exhaust hole;
The counter-force rod is connected with the temperature-control pressure chamber base in a bottom threaded knob mode, the temperature-control pressure chamber top cover is assembled with the counter-force rod through a first M10 socket head cap screw, the axial loading rod positioning ring is assembled with the temperature-control pressure chamber base through a M6 socket head cap screw, an O-shaped ring is placed in a groove of the temperature-control pressure chamber base for sealing, the refrigerant passage embedded temperature-control pressure chamber cylinder is assembled with the temperature-control pressure chamber base through a M6 socket head cap screw, O-shaped rings with proper sizes are placed in the groove of the temperature-control pressure chamber base and the lateral groove of the temperature-control pressure chamber top cover for sealing, and the temperature sensor is embedded in the temperature-control pressure chamber base;
The embedded temperature control pressure chamber cylinder of the refrigerant channel is formed by nesting two materials, the outer layer is a hollow heat preservation cylinder made of heat preservation materials with certain rigidity, and the inner layer is formed by easily-conducting materials embedded in the refrigerant channel; the upper part and the lower part respectively comprise two refrigerant circulation channel outlets and a refrigerant circulation channel inlet; the bottom of the refrigerant channel embedded temperature control pressure chamber cylinder comprises four first M10 hexagon socket head cap screw preformed holes;
the base of the temperature control pressure chamber is directly connected with the bearing platform of the temperature control chamber, and comprises a lower water inlet hole, a lower exhaust hole and an embedded temperature sensor; the lower part of the lower water inlet hole is connected with a water pressure/volume controller, the upper part of the lower water inlet hole is connected with a double-outer tooth communication, and the lower part of the lower exhaust hole is connected with an air pressure controller;
The bottom of the top cover of the temperature control pressure chamber comprises four counterforce rod embedded holes, and the top of the top cover of the temperature control pressure chamber comprises four first M10 socket head cap screw reserved holes; the upper part of the pore pressure sensor is connected with a communicable sealing plug.
2. The stable and accurate temperature control anisotropic resonance column method of claim 1 wherein the axial loading section comprises: the device comprises a temperature control pressure chamber bearing platform, an axial driver, an axial load sensor, a linear displacement sensor and an axial loading rod;
the axial driver is connected with the axial loading rod, the axial load sensor is arranged at the middle lower part of the axial loading rod, and the linear displacement sensor is fixed on the axial loading rod through a bracket; the axial driver is directly connected with the bottom of the bearing platform of the temperature control pressure chamber; the upper part of the axial loading rod penetrates through the inner holes of the temperature control pressure chamber base and the axial loading rod positioning ring to enter the temperature control pressure chamber, the outer diameter of the axial loading rod is slightly smaller than the inner hole diameters of the temperature control pressure chamber base and the axial loading rod positioning ring, and O-shaped rings are placed on the inner hole side walls of the temperature control pressure chamber base and the axial loading rod positioning ring for sealing.
3. The stable and accurate temperature control anisotropic resonant column method of claim 1 wherein the torsional excitation section comprises: the device comprises a torsion driver, a torsion loading shaft, a torque sensor, a torque loading frame, an acceleration sensor and an M6 socket head cap screw;
The torsion driver is connected with the lower part of the top cover of the temperature control pressure chamber through an M6 inner hexagonal screw, the torsion driver is connected with the torsion loading shaft, the torque sensor is arranged in the middle of the torsion loading shaft, and the torsion loading frame is connected with the torsion loading shaft through a threaded knob mode;
the acceleration sensor is assembled with one side of the torsion loading frame, and the weight piece with the same size and weight as the acceleration sensor is placed on the other side of the torsion loading frame.
4. The stable and accurate temperature control anisotropic resonance column method according to claim 1, wherein the temperature and signal acquisition and control section comprises: the system comprises a temperature control system, a multichannel signal acquisition monitoring and servo control system, a microcomputer, a refrigerant inlet pipe and a refrigerant outlet pipe;
One end of the refrigerant inlet pipe/refrigerant outlet pipe is connected with a refrigerant outlet and a refrigerant inlet of the temperature control system, the other end is connected with a refrigerant circulation channel inlet and a refrigerant circulation channel outlet of the refrigerant channel embedded temperature control pressure chamber cylinder, and the small computer is connected with the multichannel signal acquisition monitoring and servo control system through a lead;
the temperature control system comprises a circulating bath, a heating/refrigerating unit and a temperature automatic regulator, and is connected with the multichannel signal acquisition monitoring and servo control system through a transmission control line; the multichannel signal acquisition monitoring and servo control system comprises a plurality of signal acquisition ports and a servo controller, wherein the signal acquisition ports are connected with the sensors through signal acquisition lines, and the servo controller is connected with the axial driver, the torsion driver and the temperature automatic regulator through transmission control lines.
5. The stable and accurate temperature control anisotropic resonance column method of claim 1 wherein the stable and accurate temperature control anisotropic resonance column system further comprises an auxiliary equipment section comprising: a water pressure/volume controller, a pneumatic controller, a sample top cap, a sample base, an upper water pipe and a lower water pipe;
The water pressure/volume connecting controller is connected with the lower water pipe, the air pressure connecting controller is connected with the lower exhaust hole, the sample base is connected with the axial loading rod in a knob mode, and the sample top cap is assembled with the torque loading frame through an M6 inner hexagon screw;
one end of the upper water pipe is communicated with the upper water drain hole through a pair of outward teeth, and the other end of the upper water pipe is communicated with the top cap water drain channel of the sample through a pair of outward teeth;
One end of the lower water pipe is communicated with the lower water inlet through the double outward teeth, and the other end is connected with the water draining channel of the sample base through the double outward teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811251153.8A CN109187168B (en) | 2018-10-25 | 2018-10-25 | Stable and accurate temperature control anisotropic resonance column system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811251153.8A CN109187168B (en) | 2018-10-25 | 2018-10-25 | Stable and accurate temperature control anisotropic resonance column system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109187168A CN109187168A (en) | 2019-01-11 |
| CN109187168B true CN109187168B (en) | 2024-07-05 |
Family
ID=64943392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811251153.8A Active CN109187168B (en) | 2018-10-25 | 2018-10-25 | Stable and accurate temperature control anisotropic resonance column system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109187168B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834319A (en) * | 2021-01-25 | 2021-05-25 | 中国科学院武汉岩土力学研究所 | Method for determining mechanical parameters of soft soil small strain hardening model |
| CN113466024B (en) * | 2021-07-16 | 2022-04-08 | 中国科学院武汉岩土力学研究所 | Method and device for testing soil resonance column under anisotropic stretching condition |
| CN114441341A (en) * | 2022-01-24 | 2022-05-06 | 西南交通大学 | Soil shearing device for testing dynamic performance of tillite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007050A (en) * | 2014-06-09 | 2014-08-27 | 华侨大学 | Vibration-control testing system of unsaturated soil column |
| CN105403458A (en) * | 2015-12-12 | 2016-03-16 | 中原工学院 | Tensile experiment device based on conventional triaxial apparatus and operation method therefor |
| CN106596283A (en) * | 2016-11-15 | 2017-04-26 | 广州市香港科大***研究院 | Temperature control three-axis system capable of accurately measuring unsaturated soil deformation rule |
| CN209043704U (en) * | 2018-10-25 | 2019-06-28 | 南京工业大学 | Stable and accurate temperature control's anisotropic resonance post device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204401C (en) * | 2003-05-23 | 2005-06-01 | 天津大学 | New technological method-2 for detecting shear wave speed in geotechnical static and dynamic triaxial instrument |
| CN101482474A (en) * | 2009-02-11 | 2009-07-15 | 西北农林科技大学 | Method for testing elastic modulus of soil body |
| CN103175728B (en) * | 2013-02-07 | 2015-07-29 | 西安理工大学 | The power true triaxil tester of soil |
| CN104596852B (en) * | 2014-11-25 | 2017-03-01 | 宁波大学 | A kind of Rock And Soil temperature control Dynamic Characteristics Test method |
| CN107607374A (en) * | 2017-09-06 | 2018-01-19 | 辽宁工程技术大学 | A kind of hollow cylinder pilot system suitable for unsaturated soil |
| CN107576562B (en) * | 2017-10-19 | 2023-05-02 | 南京泰克奥科技有限公司 | Multi-field coupling true triaxial test system and test method thereof |
-
2018
- 2018-10-25 CN CN201811251153.8A patent/CN109187168B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007050A (en) * | 2014-06-09 | 2014-08-27 | 华侨大学 | Vibration-control testing system of unsaturated soil column |
| CN105403458A (en) * | 2015-12-12 | 2016-03-16 | 中原工学院 | Tensile experiment device based on conventional triaxial apparatus and operation method therefor |
| CN106596283A (en) * | 2016-11-15 | 2017-04-26 | 广州市香港科大***研究院 | Temperature control three-axis system capable of accurately measuring unsaturated soil deformation rule |
| CN209043704U (en) * | 2018-10-25 | 2019-06-28 | 南京工业大学 | Stable and accurate temperature control's anisotropic resonance post device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109187168A (en) | 2019-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2020104161A4 (en) | Anisotropic resonant column system and method for stable and accurate temperature control | |
| CN109187168B (en) | Stable and accurate temperature control anisotropic resonance column system and method | |
| CN105699196B (en) | Rock seepage-stress-temperature-chemical Coupling rheological measurement device and its method | |
| US4955237A (en) | Method and apparatus for measurement of in-situ horizontal stress by freezing of the ground in-situ | |
| CN110082277B (en) | Coal rock triaxial multiphase seepage test device capable of periodically disturbing and test method | |
| CN104713791B (en) | A kind of torsional shear strength of soil body cylinder sample and Deformation Observation experimental rig | |
| CN106644750A (en) | Dynamic and static triaxial tester for frozen and thawed soil in open system | |
| AU2020101815A4 (en) | An experimental instrument for rock mass tension and compression synergy | |
| WO2020135484A1 (en) | Device and method for detecting density of grouts in connecting structure of steel sleeve | |
| CN202256072U (en) | Portable vane-shear apparatus | |
| CN103267682A (en) | Device and method for testing material creep under coupling action of tensile stress and environment | |
| CN105527175A (en) | Soil engineering triaxial shear test equipment based on MTS electro-hydraulic servo tester | |
| CN108645565B (en) | Dual-channel servo control dynamic pore pressure calibration instrument and calibration method | |
| CN108303065B (en) | Micro-amplitude vibration rock-soil dynamic settlement experimental instrument and use method | |
| CN207937266U (en) | polluted soil tensile strength tester | |
| CN205656082U (en) | Geotechnique triaxial shear test equipment based on servo testing machine of MTS electricity liquid | |
| LU501086B1 (en) | Anisotropic Resonant Column System with Stable and Accurate Temperature Control and Method | |
| CN109653258A (en) | The calcareous sand pile foundation model assay systems of analog pile driving process | |
| CN211955049U (en) | Hydrate-containing sediment mechanical property detection device | |
| CN209211512U (en) | A kind of vertical hammering load pile foundation model test apparatus of calcareous sand | |
| CN207891932U (en) | A kind of controllable confining pressure is used to simulate the experimental provision of closing pile installation process | |
| CN106323765B (en) | Hollow cylinder anisotropy tester for granular material | |
| CN114965011A (en) | Sample cap, hollow torsion interface shear triaxial apparatus and test method | |
| CN207570997U (en) | A kind of stress state and the controllable hollow cylinder interface torsion shear apparatus of load path | |
| Voyiadjis et al. | Preparation of large-size cohesive specimens for calibration chamber testing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |