CN109187168A - 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
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- CN109187168A CN109187168A CN201811251153.8A CN201811251153A CN109187168A CN 109187168 A CN109187168 A CN 109187168A CN 201811251153 A CN201811251153 A CN 201811251153A CN 109187168 A CN109187168 A CN 109187168A
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- 238000012360 testing method Methods 0.000 claims abstract description 22
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- 239000003507 refrigerant Substances 0.000 claims description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 239000011148 porous material Substances 0.000 claims description 21
- 230000006641 stabilisation Effects 0.000 claims description 21
- 238000011105 stabilization Methods 0.000 claims description 21
- 239000004744 fabric Substances 0.000 claims description 15
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- 238000007596 consolidation process Methods 0.000 claims description 13
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- 239000012530 fluid Substances 0.000 claims description 6
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 4
- 238000000079 presaturation Methods 0.000 claims description 4
- 239000011800 void material Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 abstract description 45
- 230000008859 change Effects 0.000 abstract description 7
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- 239000011343 solid material Substances 0.000 abstract 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- 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
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Abstract
The invention belongs to the technical field of testing the strength characteristic of a solid material by using mechanical stress, and discloses a stable and accurate temperature control anisotropic resonance column system and a method, wherein the method comprises the following steps: the device comprises a temperature control pressure chamber part, a torsion 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 performs back pressure saturation on the original soil or remolded soil to ensure that the sample is completely saturated; the numerical values of the sensors are digitally displayed by using a software program, and the axial driver, the torsion driver and the automatic temperature regulator are accurately and effectively controlled to reach a test target value; the device can work normally at the ambient temperature of minus 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 Environmental Geotechnical and energy geotechnical engineering field more particularly to a kind of stabilization with it is precisely temperature controlled
Anisotropy Resonant Column system and method.It is mainly used in and each stress state is measured to Environmental Geotechnical and energy geotechnical engineering field
Soil body small strain dynamic characteristics under temperature effect effect.
Background technique
The buildings such as bridge, the house on ground make soil and these when by earthquake, traffic loading vibration or mechanical oscillation
Building system bears the vibration of different amplitude and frequency, when the resonant frequency of soil and building system falls in external load
Frequency range will resonate, and generate greatly harm to building.The dynamic properties of soils for studying each range of strain of soil, to anti-
Shake and has combated a natural disaster extremely important meaning at damping.
Resonant Column is the important tests equipment of each range of strain dynamic parameters of test soil, it is by applying not to soil
The load of same frequency and amplitude realizes measurement and analyzes native dynamic properties of soils, for measuring dynamic soil from small strain to moderate strains
Property.The theoretical basis of resonant column test is wave communication theory-wave theory in the soil body.Typically the sample of Resonant Column is
The solid cylindrical soil body, bottom is fixed on the base, and top adds a Rigid Mass block, and can be by horizontal rotatio direction certainly
By swinging, i.e., the free structure of the other end is fixed in one end.Twisting resistance is applied to sample by mass block, sample will rotate with vibration
It is dynamic.
Still lack currently, can stablize with the resonance column device of the anisotropic soil small strain kinetic parameter of accurate temperature control.It is existing
Some CN105928774A disclose a kind of soil sample resonance column device, including pedestal, mass block, vertical displacement sensor, steel
Rope, pulley blocks and balance weight；Wherein mass block is made of cross, magnet, accelerometer and clump weight, 4 ends of cross
On be fitted with bar magnet, the both ends of each bar magnet are all arranged with coil；Accelerometer and clump weight are separately mounted to
Cross radial edges, the two are equal in weight, and balance mass block.The bottom end of soil sample is fixed on the base, top and quality
The connection of block center.Equiponderant balance weight is connected with mass block with steel cable, is allowed to balance by pulley blocks, to reduce mass block
To the influence of soil sample during the test.When coil has electric current to flow through, twists soil sample driving mass block, control
Device processed detects the angular acceleration signal of soil sample twisting by accelerometer, and the resonance of soil sample is finally obtained by signal processing
Frequency and damping ratio.By the setting of pulley and balance weight, the weight of mass block is offset, is being tested with reducing mass block to soil sample
Influence in the process, the equipment by it is biggish improve Resonant Column measurement accuracy and accuracy.
CN106094915A provides a kind of shipborne resonant column instrument, is by turning round the present invention relates to a kind of shipborne resonant column instrument
Rotational oscillation moves electromagnetic actuator device, extensional vibration device, balance base and detection device composition, twisting vibration electromagnetic actuator device
The twisting vibration magnet being respectively placed in four driving coils by four is fixed by screws in the four of cross shape swing arm respectively
On a endpoint, four driving coils are attached separately in four coil sets, and four driving coils pass through cable respectively and power supply connects
Four sets of twisting vibration electromagnetic actuator devices of composition are connect, four sets of twisting vibration electromagnetic actuator devices are angularly separately fixed in support
On cylinder.The present invention solves the problems, such as that existing resonance column device influences its measuring accuracy due to the swing of experimental stand, makes extensively
Resonant Column instrument applied to ground test can be applied on sea exploration vessel, can be in time to the collected sediment sample of institute
Detection and analysis, without taking land laboratory testing and analysis again.Eliminate carrying and keeping, save manpower and material resources and when
Between.
In addition, CN106094915A discloses energy injection type virtual mass Resonant Column control system and control method, it is
System includes mass block and control device, and soil sample bottom end is fixed on the base, and top is connect with mass block center.Mass block includes
Cross, connector, 4 blocks of bar magnets, accelerometer and clump weight；Control device includes single-chip microcontroller, USB interface, modulus turn
Parallel operation, digital analog converter, charge amplifier, variable connector, programmable gain amplifier, sampling holder and power amplifier；
Accelerometer, charge amplifier, programmable gain amplifier, sampling holder, analog-digital converter are sequentially connected, and are added for detecting
Speed signal；Digital analog converter, power amplifier and coil are sequentially connected, for driving mass block to vibrate soil sample.Control
Device is connect by USB interface with PC machine, receives the various instructions from PC, while related data are also uploaded to PC machine and are shown
Real-time display.The device is constantly acquired the angular acceleration of mass block after electrifying startup, exports after carrying out relevant treatment
Signal makes coil generate magnetic field to coil, it is real there are currently no other signal sources in the case where soil sample can also be made in given frequency
Movement is got up under rate and given amplitude.
In conclusion existing resonance column device the problem is that:
Can not achieve can (- 20 DEG C~90 DEG C) stabilizations of wide scope and the control of accurately temperature.
Saturation cannot be carried out to soil sample in pressure chamber and measure the volume change of the soil body.
Unequal consolidation cannot be carried out to soil sample, to measure anisotropic soil small strain dynamic parameters.
Solve the difficulty and meaning of above-mentioned technical problem:
(1) can not achieve can (- 20 DEG C~90 DEG C) stabilization of wide scope and accurately for existing anisotropy resonance column device
Temperature control；
(2) existing anisotropy resonance column device cannot be saturated undisturbed soil or manipulated soil.
(3) the anisotropy resonance column device having cannot be (unequal solid to isotropic (isotropic consolidation) or anisotropic
Knot) consolidation soil sample progress torsional excitation.
Meaning:
In recent years, it breaks ground place in thermal energy storage, nuclear waste disposal, urban heat land effect, explosion treatment of soft foundation and Han Qu
The Study on Temperature Effects in the fields such as reason, Rock And Soil has important theory significance and application value, is Environmental Geotechnical and energy source rock
One important topic of native engineering field.For these practical problems in existing Important Project, lack a kind of real suitable for engineering
Border can (- 20 DEG C~90 DEG C) stabilizations of wide scope and precisely temperature controlled anisotropy resonates column device；Lacking one kind can be with
Undisturbed soil or manipulated soil are saturated, and soil sample is consolidated to isotropic (isotropic consolidation) or anisotropic (unequal consolidation)
Torsional excitation, while accurate Control experiment environment temperature are carried out, under research environment temperature effect there is anisotropic to consolidate item
The device of each strain level (0.0001%~0.1%) dynamic characteristics of part soil.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of stabilization and accurate temperature controlled anisotropy are total
Vibration column system and method.
The column system the invention is realized in this way a kind of stabilization and precisely temperature controlled anisotropy resonate is described steady
Fixed and accurate temperature controlled anisotropy resonance column system includes: temperature control pressure chamber part, torsional excitation part, axial loading
Partially, temperature and signal acquisition and controlling part and ancillary equipment part.
Temperature control pressure chamber part provides pressure chamber and temperature-controlling chamber.
It is applied to sample and the torsion forced vibration of each frequency range is provided in torsional excitation part.
Axial loading part provides axial stress to sample, realizes sample anisotropic consolidation.
Temperature and signal acquisition and controlling part according to test requirements document adopt each driver of control and each sensor of acquisition with
Data.
Further, temperature control pressure chamber part includes: temperature control pressure chamber top cover, the embedded temperature control pressure chamber of refrigerant passage
Cylinder, temperature control pressure chamber base, counter-force bar, axial loading pole positioning ring, the first M10 hexagon socket head cap screw, M6 hexagon socket head cap screw, ball
Valve, sensor for pore water pressure, temperature sensor, upper drainage hole, lower inlet opening, upper air-vent, lower gas vent；
Counter-force bar is connect by bottom thread knob mode with temperature control pressure chamber base, and temperature control pressure chamber top cover passes through first
M10 hexagon socket head cap screw and counter-force bar are assembled, and axial loading pole positioning ring is spelled by M6 hexagon socket head cap screw and temperature control pressure chamber base
Dress places O-ring to seal in temperature control pressure chamber base groove, and the embedded temperature control pressure chamber cylinder of refrigerant passage passes through in M6
Hex(agonal)screw and temperature control pressure chamber base are assembled, in temperature control pressure chamber base groove and temperature control pressure chamber top cover lateral groove
The O-ring of suitable dimension is placed to seal, temperature sensor is embedded in temperature control pressure chamber base；
The embedded temperature control pressure chamber cylinder of refrigerant passage is formed by two kinds of material nestings, and outer layer is the heat preservation with certain rigidity
Hollow insulating cylinder made of material, internal layer are to be embedded in the easy of refrigerant passage to lead adiabator composition；Top and the bottom respectively include two it is cold
The outlet of matchmaker's circulation canal and refrigerant circulation feeder connection；Refrigerant passage embedded temperature control pressure chamber cylinder bottom includes in the first M10
Hex(agonal)screw preformed hole four；
Temperature control pressure chamber base is directly connected to temperature-controlling chamber's cushion cap, and pedestal includes a lower inlet opening, lower gas vent and one
A embedded temperature detector；Lower inlet opening lower part connects water pressure/fixing fabric structure device, and lower inlet opening top connects two-way outer tooth
Connection, the connection of lower gas vent lower part connect gas pressure regulator；
Temperature control pressure chamber cap base includes counter-force bar embedded hole four, includes the first M10 at the top of temperature control pressure chamber top cover
Hexagon socket head cap screw preformed hole four；Sensor for pore water pressure top connects can communication type seal plug.
Further, the axial loading part includes: temperature control pressure chamber cushion cap, axially driving device, axial load sensor,
Linear movement pick-up, axial loading pole；
Axially driving device is connect with axial loading pole, and axial load sensor is assembled in axial loading pole middle and lower part, line position
Displacement sensor is fixed by the bracket on axial loading pole；Axially driving device is directly linked with temperature control pressure chamber cushion cap bottom；Axis
The inner hole for passing through temperature control pressure chamber base and axial loading pole positioning ring to loading pole top enters in temperature control pressure chamber, axial to add
The outer diameter of lotus bar is slightly less than the diameter of bore of temperature control pressure chamber base and axial loading pole positioning ring, in temperature control pressure chamber base and
The inner hole side wall of axial loading pole positioning ring places O-ring to seal.
Further, the torsional excitation part includes: torsion driver, reverses loading axis, torque sensor, torque load
Frame, acceleration transducer, M6 hexagon socket head cap screw；
Torsion driver is connect by M6 hexagon socket head cap screw with temperature control pressure chamber top cover lower part, and torsion driver and torsion add
Lotus axis connection, torque sensor are assembled in the middle part of torsion loading axis, and torsion loading frame passes through screw knob mode and torsion loading
Axis is connected；
The side of acceleration transducer and torsion loading frame is assembled, and the other side is placed and acceleration transducer size and weight
Consistent counterweight.
Further, the temperature and signal acquisition and controlling part include: temperature control system, multi-channel signal acquiring prison
Control and servo-control system, minicomputer, refrigerant enter pipe, refrigerant discharge pipe；
Refrigerant enters pipe and refrigerant discharge pipe each two, and refrigerant enters pipe/refrigerant discharge pipe one end jointing temp control system
Refrigerant exit, refrigerant inlet, the embedded temperature control pressure chamber cylinder refrigerant circulation feeder connection of another termination refrigerant passage, refrigerant follow
Ring channel outlet, minicomputer is monitored by conducting wire with multi-channel signal acquiring and servo-control system is connect；
Temperature control system includes circulation bath, and heating/refrigerating unit and thermostat, temperature control control system pass through
Transmission control line is monitored with multi-channel signal acquiring and servo-control system is connect；Multi-channel signal acquiring monitoring and SERVO CONTROL
System includes multiple signal acquisition mouths and servo controller, and signal acquisition mouth is connect with each sensor by signal acquisition line, watched
It takes controller and is connect by transmitting control line with axially driving device, torsion driver and thermostat.
Further, the ancillary equipment part includes: to connect water pressure/fixing fabric structure device, even gas pressure regulator, sample top
Cap, specimen mount, upper water service pipe, lower water service pipe；
Even water pressure/fixing fabric structure device is connect with lower water service pipe, and even gas pressure regulator is connect with lower gas vent, specimen mount
It is connected by knob mode with axial loading pole, sample top cap is assembled by M6 hexagon socket head cap screw 35 and torque loading frame；
Upper water service pipe one end is connect by two-way outer tooth connection with upper drainage hole, the other end by with two-way outer tooth connection with
The connection of sample top cap drainage channel；
Lower water service pipe one end is connect by two-way outer tooth connection with lower inlet opening, the other end by with two-way outer tooth connection with
The connection of specimen mount drainage channel.
Implement the stabilization and precisely temperature controlled anisotropy resonance another object of the present invention is to provide a kind of
The stabilization of column system and precisely temperature controlled anisotropy resonate column method, the stabilization with it is accurate temperature controlled respectively to different
Property resonance column method the following steps are included:
Step 1, will be in the blade on sample insertion specimen mount top；It is placed in the permeable stone lower part of sample top cap bottom
Slightly larger than the filter paper of permeable stone diameter, sample top cap is placed at the top of solid cylindrical sample, and by sample top cap bottom blade
It is embedded at the top of solid cylindrical sample；Sample top cap is assembled by M6 hexagon socket head cap screw and torsion loading frame；By upper water service pipe one end
It is connect by two-way outer tooth connection with upper drainage hole, the other end with two-way outer tooth connection and sample top cap drainage channel by connecting
It connects；
Step 2 carries out presaturation to sample: opening gas pressure regulator, to the pressure for applying 30kPa inside temperature control pressure chamber
Then power opens fluid pressure/fixing fabric structure device, apply the hydraulic pressure of 20kPa to sample, from the two-way outer of sensor for pore water pressure top
Tooth connection excludes gas；Classification saturation: the two-way outer tooth connection interior tooth sealing sealing on sensor for pore water pressure top is carried out to sample,
Both increased temperature control pressure room pressure and sample internal void water pressure, while being kept difference with identical speed is always
10kPa, until sample reaches fully saturated；
Pressure room pressure is increased to a certain particular value, while controlling axially driving device according to test requirements document by step 3
Axial compressive force is increased into formulation value, isotropic is carried out to sample or anisotropic consolidates；Exciting is applied to torsion driver
Voltage starts resonant column test.
Another object of the present invention is to provide a kind of implementation stabilizations and accurate temperature controlled anisotropy Resonant Column side
The anisotropy resonance column device of method.
In conclusion advantages of the present invention and good effect are as follows:
The present invention can guarantee being evenly distributed for temperature, realize that width encloses (- 20 DEG C~90 DEG C) stabilizations and accurate experimental enviroment temperature
Degree control, and can apply cold cycling effect, can to it is original-pack soil or manipulated soil carry out resonant column test, measure it is original-pack soil or
The modulus at rapid deformation of the wider range of strain of manipulated soil, dynamic damping, natural frequency, strain-stress relation, and ring is studied using the Resonant Column
Border temperature effect, influence of the anisotropic consolidation condition to soil small strain dynamic characteristics；Isotropic can be carried out to sample (
Deng consolidation) or anisotropic (unequal consolidation) consolidation；It can accurately measure sample in sample consolidation process axially to become with volume
Change.
The present invention prevents the sample eccentricity in torsional excitation, back-pressure saturation is carried out to original-pack soil or manipulated soil, so that examination
Sample can achieve fully saturated；Each sensor is connect with signal acquisition case, and the quantity of electric charge of the signal of each sensor output is by charge
Amplifier is converted to voltage, adjusts the size of voltage, through programmable gain amplifier to further increase measurement accuracy, mould
The analog quantity of acceleration signal is become digital quantity and computer is sent to be handled and shown by number converter.Axially driving device is turned round
Turn driver and thermostat to connect by servo controller with computer, each continuous sampled signal of sensor, so
The axial direction given afterwards according to user, torsion and temperature value are compared, and error signal are obtained, then respectively to this error signal
It carries out numerical scale, integral and differential (PID) to adjust, number is become into analog vibration signal through digital analog converter, passes through servo
Controller.Axially driving device is precisely effectively controlled, torsion driver and thermostat reach test objective value.Guarantee
Device can work normally under -20 DEG C~90 DEG C of environment temperature, and precise measurement and control fluid pressure and liquid volume become
Change, precise measurement and control gas pressure change.
Detailed description of the invention
Fig. 1 is stabilization provided in an embodiment of the present invention and precisely temperature controlled anisotropy Resonant Column system structure is illustrated
Figure；
In figure: 1, temperature control pressure chamber top cover；2, ball valve；3, upper air-vent；4, the first M10 hexagon socket head cap screw；5, torsion is driven
Dynamic device；6, loading axis is reversed；7, refrigerant circulation channel outlet；8, torque sensor；9, acceleration transducer；10, torque loads
Frame；11, sample top cap；12, counter-force bar；13, sample；14, latex film；15, the embedded temperature control pressure chamber cylinder of refrigerant passage；16,
Refrigerant circulation feeder connection；17, the 2nd M10 hexagon socket head cap screw；18, axial loading pole positioning ring；19, lower inlet opening；20, temperature control
Pressure chamber base；21, connect water pressure/fixing fabric structure device；22, linear movement pick-up；23, axle power load sensor；24, axial to add
Lotus bar；25, axially driving device；26, temperature control pressure chamber cushion cap；27, refrigerant enters pipe；28, refrigerant discharge pipe；29, temperature sensing
Device；30, connect gas pressure regulator；31, minicomputer；32, lower water service pipe；33, specimen mount；34, upper water service pipe；35, in M6
Hex(agonal)screw；36, upper drainage hole；37, sensor for pore water pressure；38, multi-channel signal acquiring monitoring and servo-control system；39, under
Gas vent；40, temperature control system.
Fig. 2 is stabilization provided in an embodiment of the present invention and accurate temperature controlled anisotropy Resonant Column method flow diagram.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The present invention can work normally under -20 DEG C~90 DEG C of environment temperature, precise measurement and control fluid pressure and
Liquid volume variation, precise measurement and control gas pressure change.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
The column system packet as shown in Figure 1, stabilization provided in an embodiment of the present invention and precisely temperature controlled anisotropy resonate
It includes:
Temperature control pressure chamber top cover 1, ball valve 2, upper air-vent 3, the first M10 hexagon socket head cap screw 4, torsion driver 5, torsion add
It is lotus axis 6, refrigerant circulation channel outlet 7, torque sensor 8, acceleration transducer 9, torque loading frame 10, sample top cap 11, anti-
The embedded temperature control pressure chamber cylinder 15 of power bar 12, sample 13, latex film 14, refrigerant passage, refrigerant circulation feeder connection 16, second
M10 hexagon socket head cap screw 17, axial loading pole positioning ring 18, lower inlet opening 19, temperature control pressure chamber base 20, even water pressure/volume
Controller 21, linear movement pick-up 22, axle power load sensor 23, axial loading pole 24, axially driving device 25, temperature control pressure chamber
Cushion cap 26, refrigerant enter pipe 27, refrigerant discharge pipe 28, temperature sensor 29, even gas pressure regulator 30, minicomputer 31, under
Water service pipe 32, specimen mount 33, upper water service pipe 34, M6 hexagon socket head cap screw 35, upper drainage hole 36, sensor for pore water pressure 37, multichannel
Signal acquisition monitoring and servo-control system 38, lower gas vent 39, temperature control system 40.
Be precisely controlled temperature control resonance column system capital equipment feature this include five parts: temperature control pressure chamber part, turn round
Turn exciting part, axial loading part, temperature and signal acquisition and controlling part and ancillary equipment part.
Temperature control pressure chamber part specifically include that the embedded temperature control pressure chamber cylinder 15 of temperature control pressure chamber top cover 1, refrigerant passage,
Temperature control pressure chamber base 20, counter-force bar 12, axial loading pole positioning ring 18, the first M10 hexagon socket head cap screw 4, M6 hexagon socket head cap screw
35, ball valve 2, sensor for pore water pressure 37, temperature sensor 29, upper drainage hole 36, lower inlet opening 19, upper air-vent 3, lower gas vent
39。
Counter-force bar 12 is connect by bottom thread knob mode with temperature control pressure chamber base 20, and temperature control pressure chamber top cover 1 is logical
It is assembled with counter-force bar 12 to cross the first M10 hexagon socket head cap screw 4, axial loading pole positioning ring 18 passes through M6 hexagon socket head cap screw 35 and temperature control
Pressure chamber base 20 is assembled, 0 type circle is placed in 20 groove of temperature control pressure chamber base to seal, the embedded temperature control of refrigerant passage
Pressure chamber cylinder 15 is assembled by M6 hexagon socket head cap screw 35 and temperature control pressure chamber base 20, in 20 groove of temperature control pressure chamber base and
0 type circle of suitable dimension is placed in 1 lateral groove of temperature control pressure chamber top cover to seal, temperature sensor 29 is embedded in temperature control pressure
In power room pedestal 20.The embedded temperature control pressure chamber cylinder of the refrigerant passage is formed by two kinds of material nestings, and outer layer is with one
Determine hollow insulating cylinder made of the thermal insulation material of rigidity, internal layer is to be embedded in the easy of refrigerant passage to lead adiabator composition；Top and the bottom
It Bao Kuo not two refrigerant circulation channel outlets 7 and refrigerant circulation feeder connection 16.Internal diameter is straight slightly larger than temperature control pressure chamber top cover 1
Diameter；Embedded 15 bottom of temperature control pressure chamber cylinder of refrigerant passage includes 4 preformed hole of the first M10 hexagon socket head cap screw four；The control
Warm pressure chamber base is made of the thermal insulation material with certain rigidity, is directly connected to temperature-controlling chamber cushion cap, and pedestal includes under one
Inlet opening 19, lower gas vent 39 and an embedded temperature detector 29；Lower 19 lower part of inlet opening connects water pressure/fixing fabric structure
Device 21, lower 19 top of inlet opening connect two-way outer tooth connection, and lower 39 lower part of gas vent connection connects gas pressure regulator 30；The control
Temperature and pressure power ceiling lid 1 is made of the thermal insulation material with certain rigidity, and temperature control pressure chamber base includes upper 36 He of drainage hole
One upper air-vent 3.Upper 36 top of drainage hole connects sensor for pore water pressure 37, and upper 36 lower part of drainage hole meets two-way outer tooth connection, upper row
3 top access valve 2 of stomata.Top cover 1 bottom in temperature control pressure chamber includes 12 embedded hole of counter-force bar four, and temperature control pressure chamber top cover 1 pushes up
Portion includes 4 preformed hole of the first M10 hexagon socket head cap screw four；37 top of sensor for pore water pressure connects can communication type seal plug.
Axial loading part specifically includes that temperature control pressure chamber cushion cap 26, axially driving device 25, axial load sensor 23,
Linear movement pick-up 22, axial loading pole 24.
Axially driving device 25 is connect with axial loading pole 24, under axial load sensor 23 is assembled in axial loading pole 24
Portion, linear movement pick-up 22 are fixed by the bracket on axial loading pole 24, and axial running part is completed in assembly；The axial direction
Driver 25 is directly linked with 26 bottom of temperature control pressure chamber cushion cap；24 top of axial loading pole passes through temperature control pressure chamber bottom
The inner hole of seat 20 and axial loading pole positioning ring 18 enters in temperature control pressure chamber, and the outer diameter of axial loading pole is slightly less than temperature control pressure
The diameter of bore of room pedestal 20 and axial loading pole positioning ring 18, in temperature control pressure chamber base 20 and axial loading pole positioning ring 18
Inner hole side wall place 0 type circle to seal.
Torsional excitation part specifically includes that torsion driver 5, reverses loading axis 6, torque sensor 8, torque loading frame
10, acceleration transducer 9, M6 hexagon socket head cap screw 35.
Torsion driver is connect by M6 hexagon socket head cap screw 35 with 1 lower part of temperature control pressure chamber top cover.Torsion driver 5 and torsion
Turn the connection of loading axis 6, torque sensor 8 is assembled in torsion loading axis 6 middle part, torsion loading frame 10 by screw knob mode with
Loading axis 6 is reversed to be connected；The side of the acceleration transducer 9 and torsion loading frame 10 is assembled, and the other side is placed and accelerated
The consistent counterweight of 9 size and weight of sensor is spent, to prevent the sample eccentricity in torsional excitation.
Temperature and signal acquisition and controlling part specifically include that temperature control system 40, multi-channel signal acquiring monitoring and
Servo-control system 38, minicomputer 31, refrigerant enter pipe 27, refrigerant discharge pipe 28.
Refrigerant enters pipe 27 and refrigerant discharge pipe 28 each two, and refrigerant enters 27/ refrigerant discharge pipe of pipe, 28 one end jointing temp
The refrigerant exit of control system 40, refrigerant inlet, another embedded 15 refrigerant circulation of temperature control pressure chamber cylinder of termination refrigerant passage are logical
Road entrance 16, refrigerant circulation channel outlet 7, minicomputer 31 is by conducting wire and multi-channel signal acquiring monitors and SERVO CONTROL
System 38 connects；The temperature control system 40 mainly includes that circulation is bathed, heating/refrigerating unit and thermostat,
Temperature control control system 40 is monitored by transmission control line with multi-channel signal acquiring and servo-control system 38 is connect；Described is more
Channel signal acquisition monitoring and servo-control system 38 include multiple signal acquisition mouths and servo controller, and signal acquisition mouth passes through
Signal acquisition line is connect with each sensor, servo controller by transmission control line and axially driving device 25, torsion driver 5 with
And thermostat connection.
Ancillary equipment part specifically includes that even water pressure/fixing fabric structure device 21, even gas pressure regulator 30, sample top cap 11,
Specimen mount 33, upper water service pipe 34 and lower water service pipe 32.
Even water pressure/fixing fabric structure device 21 is connect with lower water service pipe 32, and even gas pressure regulator 30 is connect with lower gas vent 39,
Specimen mount 33 is connected by knob mode with axial loading pole 24, and sample top cap is loaded by M6 hexagon socket head cap screw 35 and torque
Frame 10 is assembled；Described 34 one end of upper water service pipe is connect by two-way outer tooth connection with upper drainage hole 36, the other end by with it is double
Outside tooth connection is connect with 11 drainage channel of sample top cap；Described 32 one end of lower water service pipe by two-way outer tooth connection under into
Water hole 19 connects, and the other end with two-way outer tooth connection with 33 drainage channel of specimen mount by connecting.
The column method packet as shown in Fig. 2, stabilization provided in an embodiment of the present invention and precisely temperature controlled anisotropy resonate
Include following steps:
S201: will be in the blade on sample insertion specimen mount top；It places and omits in the permeable stone lower part of sample top cap bottom
Greater than the filter paper of permeable stone diameter, sample top cap is placed at the top of solid cylindrical sample, and sample top cap bottom blade is embedding
Enter at the top of solid cylindrical sample；Sample top cap is assembled by M6 hexagon socket head cap screw and torsion loading frame；Upper water service pipe one end is led to
It crosses two-way outer tooth connection to connect with upper drainage hole, the other end with two-way outer tooth connection with sample top cap drainage channel by connecting；
S202: carrying out presaturation to sample: opening gas pressure regulator, applies the pressure of 30kPa to temperature control pressure chamber inside,
Then fluid pressure/fixing fabric structure device is opened, applies the hydraulic pressure of 20kPa, the two-way outer tooth from sensor for pore water pressure top to sample
Connection excludes gas；Classification saturation: the two-way outer tooth connection interior tooth sealing sealing on sensor for pore water pressure top is carried out to sample, with
Identical speed increases temperature control pressure room pressure and sample internal void water pressure, while both keeping the difference to be always
10kPa, until sample reaches fully saturated；
S203: according to test requirements document, increasing to a certain particular value for pressure room pressure, while controlling axially driving device will
Axial compressive force increases to formulation value, carries out isotropic to sample or anisotropic consolidates；Exciting electricity is applied to torsion driver
Pressure starts resonant column test.
The working principle of the invention: placement O-ring, will be in four M6 to seal in temperature control pressure chamber base inner groovy
The M6 hexagon socket head cap screw preformed hole that hex(agonal)screw passes through axial loading pole positioning ring is connect with temperature control pressure chamber base；Specimen mount
By assembled at the top of knob mode and axial loading pole；Counter-force bar is connected by bottom thread knob mode and temperature control pressure chamber base
It connects, temperature control pressure chamber top cover is assembled by M10 hexagon socket head cap screw and counter-force bar；Torsion driver passes through M6 hexagon socket head cap screw and control
The connection of temperature and pressure power ceiling lid lower part.Torsion driver is connect with torsion loading pole；Torque sensor is assembled in torsion loading
In the middle part of bar, then torsion loading frame is connected by screw knob mode with torsion loading pole；By ball valve loaded on upper air-vent
Portion, pore pressure force snesor are loaded on upper drainage hole top, four two-way outer tooth connection are attached separately to lower inlet opening top, sample bottom
Seat side pore channel, sample top cap side pore channel and upper drainage hole lower part；It places on permeable stone top slightly larger than permeable
Then solid cylinder soil sample is placed in specimen mount top by the filter paper of stone diameter, sample is then embedded in specimen mount top
Blade in；The filter paper for being slightly larger than permeable stone diameter is placed in the permeable stone lower part of sample top cap bottom, and sample top cap is placed
At the top of solid cylindrical sample, and will be at the top of sample top cap bottom blade insertion solid cylindrical sample；By emulsion film a set of in soil sample
Outside, latex film are fixed by O-ring and specimen mount and sample top cap；Sample top cap is passed through into M6 hexagon socket head cap screw and torsion
Loading frame is assembled；Upper water service pipe one end is connect by two-way outer tooth connection with upper drainage hole, the other end by with two-way outer tooth
Connection is connect with sample top cap drainage channel；Lower water service pipe one end is connect by two-way outer tooth connection with lower drainage hole, it is another
End with two-way outer tooth connection with specimen mount drainage channel by connecting；Each sensor is believed using signal acquisition line and multichannel
Number acquisition monitoring and servo-control system signal acquisition mouth connection, by axially driving device, torsion driver and temperature are automatic
Adjuster is connect using transmission control line with servo controller, and multi-channel signal acquiring is monitored and servo-control system and temperature
Degree control system is connect with minicomputer；0 type circle is placed in temperature control pressure chamber base external groove, in temperature control pressure chamber top cover
O-ring is placed in side grooves, in the M10 that four M10 hexagon socket head cap screws are passed through to the embedded temperature control pressure chamber cylinder of refrigerant passage
Hex(agonal)screw preformed hole is connect with temperature control pressure chamber base；Fluid pressure/fixing fabric structure device is connect into lower inlet opening lower part, air pressure control
Device processed connects lower gas vent lower part；Close ball valve, by sensor for pore water pressure top can communication type seal plug interior tooth seal remove；It is right
Sample carries out presaturation: opening gas pressure regulator, to the pressure for applying 30kPa inside temperature control pressure chamber, then opens liquid pressure
Power/fixing fabric structure device applies the hydraulic pressure of 20kPa to sample, excludes gas from the two-way outer tooth connection on sensor for pore water pressure top；It is right
Sample carries out classification saturation: the two-way outer tooth connection interior tooth sealing sealing on sensor for pore water pressure top, with the increase of identical speed
Temperature control pressure room pressure and sample internal void water pressure, while keep the two difference is 10kPa always, until sample reaches
It is fully saturated；According to test requirements document, pressure room pressure is increased into a certain particular value, while controlling axially driving device will be axial
Pressure increase carries out isotropic to sample or anisotropic consolidates to formulation value；
Exciting voltage is applied to torsion driver, changes vibration frequency, until measuring the resonant frequency of system, then
Sample is allowed to carry out free vibration, according to the geometric dimension of resonant frequency and test specimen, sample free decaying data, the limitation item of end
Part etc. calculates the natural frequency and dynamic shear modulus of test specimen, dynamic damping ratio and dynamic strain amplitude.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
- The column method 1. a kind of stabilization and precisely temperature controlled anisotropy resonate, which is characterized in that the stabilization and precisely temperature Spending the anisotropy resonance column method controlled includes:It will be in the blade on sample insertion specimen mount top；It is placed in the permeable stone lower part of sample top cap bottom and is slightly larger than permeable stone Sample top cap is placed at the top of solid cylindrical sample by the filter paper of diameter, and sample top cap bottom blade is embedded in solid cylinder At the top of sample；Sample top cap is assembled by M6 hexagon socket head cap screw and torsion loading frame；Upper water service pipe one end is passed through into two-way outer tooth Connection is connect with upper drainage hole, and the other end with two-way outer tooth connection with sample top cap drainage channel by connecting；Presaturation is carried out to sample: opening gas pressure regulator, to the pressure for applying 30kPa inside temperature control pressure chamber, is then opened Fluid pressure/fixing fabric structure device applies the hydraulic pressure of 20kPa to sample, excludes from the two-way outer tooth connection on sensor for pore water pressure top Gas；Classification saturation: the two-way outer tooth connection interior tooth sealing sealing on sensor for pore water pressure top is carried out to sample, with identical speed Degree increases temperature control pressure room pressure and sample internal void water pressure, while keep the two difference is 10kPa always, until examination Sample reaches fully saturated；According to test requirements document, pressure room pressure is increased into a certain particular value, while controlling axially driving device for axial compressive force Increase to designated value, isotropic is carried out to sample or anisotropic consolidates；It is automatic according to needing to control temperature after the completion of consolidation Adjuster is heated up or is cooled down to temperature control triaxial cell, environment temperature needed for reaching test, after temperature is stablized, to torsion Driver applies exciting voltage, starts resonant column test.
- 2. described in a kind of operation claim 1 it is stable with the precisely stabilization of temperature controlled anisotropy resonance column method and precisely Temperature controlled anisotropy resonance column system, which is characterized in that the stabilization and precisely temperature controlled anisotropy resonance Column system includes: temperature control pressure chamber part, torsional excitation part, axial loading part, temperature and signal acquisition and controlling part；Temperature control pressure chamber part is for providing pressure chamber and temperature-controlling chamber；Torsional excitation part provides the torsion forced vibration of each frequency range for applying to sample；Axial loading part is used to provide axial stress to sample, realizes sample anisotropic consolidation；Temperature and signal acquisition and controlling part be used to adopt according to test requirements document each driver of control and each sensor of acquisition with Data.
- The column system 3. as claimed in claim 2 stable and accurate temperature controlled anisotropy resonates, which is characterized in that described Temperature control pressure chamber part include: temperature control pressure chamber top cover, the embedded temperature control pressure chamber cylinder of refrigerant passage, temperature control pressure chamber base, Counter-force bar, axial loading pole positioning ring, the first M10 hexagon socket head cap screw, M6 hexagon socket head cap screw, ball valve, sensor for pore water pressure, temperature pass Sensor, upper drainage hole, lower inlet opening, upper air-vent, lower gas vent；Counter-force bar is connect by bottom thread knob mode with temperature control pressure chamber base, and temperature control pressure chamber top cover passes through the first M10 Hexagon socket head cap screw and counter-force bar are assembled, and axial loading pole positioning ring is assembled by M6 hexagon socket head cap screw and temperature control pressure chamber base, O-ring is placed in temperature control pressure chamber base groove to seal, the embedded temperature control pressure chamber cylinder of refrigerant passage passes through in M6 six Angle screw and temperature control pressure chamber base are assembled, put in temperature control pressure chamber base groove and temperature control pressure chamber top cover lateral groove The O-ring of suitable dimension is set to seal, temperature sensor is embedded in temperature control pressure chamber base；The embedded temperature control pressure chamber cylinder of refrigerant passage is formed by two kinds of material nestings, and outer layer is the thermal insulation material with certain rigidity Manufactured hollow insulating cylinder, internal layer are to be embedded in the easy of refrigerant passage to lead adiabator composition；Top and the bottom respectively include two refrigerants and follow Ring channel outlet and refrigerant circulation feeder connection；Refrigerant passage embedded temperature control pressure chamber cylinder bottom includes hexagonal in the first M10 Screw preformed hole four；Temperature control pressure chamber base is directly connected to temperature-controlling chamber's cushion cap, and pedestal includes that a lower inlet opening, lower gas vent and one are embedding Enter formula temperature sensor；Lower inlet opening lower part connects water pressure/fixing fabric structure device, the two-way outer tooth connection of lower inlet opening top connection Logical, the connection of lower gas vent lower part connects gas pressure regulator；Temperature control pressure chamber cap base includes counter-force bar embedded hole four, includes six in the first M10 at the top of temperature control pressure chamber top cover Angle screw preformed hole four；Sensor for pore water pressure top connects can communication type seal plug.
- The column system 4. as claimed in claim 2 stable and accurate temperature controlled anisotropy resonates, which is characterized in that described Axial loading part includes: temperature control pressure chamber cushion cap, axially driving device, axial load sensor, linear movement pick-up, it is axial plus Lotus bar；Axially driving device is connect with axial loading pole, and axial load sensor is assembled in axial loading pole middle and lower part, and displacement of the lines passes Sensor is fixed by the bracket on axial loading pole；Axially driving device is directly linked with temperature control pressure chamber cushion cap bottom；It is axial to add Lotus bar top passes through temperature control pressure chamber base and the inner hole of axial loading pole positioning ring enters in temperature control pressure chamber, axial loading pole Outer diameter be slightly less than the diameter of bore of temperature control pressure chamber base and axial loading pole positioning ring, in temperature control pressure chamber base and axial direction The inner hole side wall of loading pole positioning ring places O-ring to seal.
- The column system 5. as claimed in claim 2 stable and accurate temperature controlled anisotropy resonates, which is characterized in that described Torsional excitation part includes: torsion driver, reverses loading axis, torque sensor, torque loading frame, acceleration transducer, M6 Hexagon socket head cap screw；Torsion driver is connect by M6 hexagon socket head cap screw with temperature control pressure chamber top cover lower part, torsion driver and torsion loading axis Connection, torque sensor are assembled in the middle part of torsion loading axis, and torsion loading frame passes through screw knob mode and torsion loading axis phase Even；The side of acceleration transducer and torsion loading frame is assembled, and the other side is placed consistent with acceleration transducer size and weight Counterweight.
- The column system 6. as claimed in claim 2 stable and accurate temperature controlled anisotropy resonates, which is characterized in that described Temperature and signal acquisition and controlling part include: temperature control system, multi-channel signal acquiring monitoring and servo-control system, small Type computer, refrigerant enter pipe, refrigerant discharge pipe；Refrigerant enters pipe and refrigerant discharge pipe each two, and it is cold that refrigerant enters pipe/refrigerant discharge pipe one end jointing temp control system Matchmaker outlet, refrigerant inlet, the embedded temperature control pressure chamber cylinder refrigerant circulation feeder connection of another termination refrigerant passage, refrigerant circulation lead to Road outlet, minicomputer is monitored by conducting wire with multi-channel signal acquiring and servo-control system is connect；Temperature control system includes circulation bath, and heating/refrigerating unit and thermostat, temperature control control system pass through transmission Control line is monitored with multi-channel signal acquiring and servo-control system is connect；Multi-channel signal acquiring monitoring and servo-control system Including multiple signal acquisition mouths and servo controller, signal acquisition mouth is connect by signal acquisition line with each sensor, servo control Device processed is connect by transmitting control line with axially driving device, torsion driver and thermostat.
- The column system 7. as claimed in claim 2 stable and accurate temperature controlled anisotropy resonates, which is characterized in that described Stabilization and precisely temperature controlled anisotropy resonance column system further comprises ancillary equipment part, the ancillary equipment portion Dividing includes: to connect water pressure/fixing fabric structure device, even gas pressure regulator, sample top cap, specimen mount, upper water service pipe, lower water service pipe；Even water pressure/fixing fabric structure device is connect with lower water service pipe, and even gas pressure regulator is connect with lower gas vent, and specimen mount passes through Knob mode is connected with axial loading pole, and sample top cap is assembled by M6 hexagon socket head cap screw 35 and torque loading frame；Upper water service pipe one end is connect by two-way outer tooth connection with upper drainage hole, the other end by with two-way outer tooth connection and sample The connection of top cap drainage channel；Lower water service pipe one end is connect by two-way outer tooth connection with lower inlet opening, the other end by with two-way outer tooth connection and sample The connection of base drain channel.
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