CN107607374A - A kind of hollow cylinder pilot system suitable for unsaturated soil - Google Patents
A kind of hollow cylinder pilot system suitable for unsaturated soil Download PDFInfo
- Publication number
- CN107607374A CN107607374A CN201710797829.2A CN201710797829A CN107607374A CN 107607374 A CN107607374 A CN 107607374A CN 201710797829 A CN201710797829 A CN 201710797829A CN 107607374 A CN107607374 A CN 107607374A
- Authority
- CN
- China
- Prior art keywords
- pressure
- sample
- hollow cylinder
- air
- air 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.)
- Pending
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of hollow cylinder pilot system suitable for unsaturated soil, it is related to earthwork test Instrument.The pilot system can be achieved to be controlled the hollow torsion shear test of unsaturated soil of suction by axially forming with torsion drive device, balancing gate pit, inside and outside confined pressure, air pressure and backpressure controllers, data acquisition unit and computer.Axially and torsion drive device can provide axial stress and moment of torsion；Pressure chamber base studs with high air-entry value pottery clay plates, and pottery clay plates are connected with hollow cylinder sample bottom；Inside and outside confined pressure, air pressure and backpressure controllers input interface and pore water are arranged at balancing gate pit bottom（Gas）Pressure sensor measures interface；Local displacement sensor, the inside and outside wall radial displacement of test test specimen and axial displacement can be set in balancing gate pit；Contacted at the top of sample by permeable stone with sample cap；Sample cap is provided with hole air pressure inlet and outlet, application and measurement for hole air pressure；Sample cap top is axle power/torque sensor, can determine the axial stress and shear stress of unsaturation sample, realizes the measure of unsaturated soils theory parameter under the conditions of principal stress axis rotation.
Description
Technical field
The invention belongs to Geotechnical Engineering test equipment technical field, more particularly to a kind of open circles suitable for unsaturated soil
Column test system.
Background technology
The differential settlement of the such as roadbed and dam that are run into engineering practice and slaking deformation, the Pingshan Mountain form huge with making
The differential settlement of thick embankment, the saturated yielding of big thickness loess, the moisture expansion and drying shrinkage of swelled ground, the unstability of deep basal pit and high slope, city
The coating of city's refuse landfill designs, the padded coaming in Deep Geological Disposal of High-level Radioactive Wastes storehouse is in heat-water-power-chemical Coupling bar
Long-term behaviour under part etc. is directed to unsaturated soils theory problem.Most of engineering practice such as road involved by Geotechnical Engineering field
Base fills, the big principal direction of stress in excavation of foundation pit, Slope Sliding the problems such as even coal mine roadway excavates suffered by the soil body with it is vertical
Angular separation will change, and particularly for high-speed railway, highway foundation, high-speed transit cyclic load will cause ground
The big principal stress of base soilσ 1With the angle of vertical directionαTime changing, cause foundation soil unit stress that the principal axes of stress occur continuous
Circulation, the soil body will be made to produce pore pressure accumulation, aggravation soil body accumulated plastic strain, trigger the change of soil body induced anisotropy and intensity
Change.In Practical Project, make engineering design relatively dangerous the deformation for underestimating unsaturated soil if ignoring this change.
The key instrument of test unsaturated soils theory characteristic includes at present：Unsaturated soil consolidation apparatus, direct shear apparatus, permeation instrument,
Standard triaxial apparatus, temperature control triaxial apparatus, multifunctional triaxial instrument and geotechnological CT- triaxial apparatus etc., by experimental study, disclose non-full
With soil and the aqueous vapor characteristics of motion of special soils and deformation, intensity, surrender, water change, saturated yielding, bulking, microscopical structure evolution, temperature
Spend many important mechanical characteristic rules such as effect；Construct the Axiomatic Theories system of rock-soil mechanics with it is polymorphic non-
The stress state variable of saturated soil；Propose Anisotropic Porous Media effective stress theoretical formula and unsaturated soil it is effective
Stress theory formula；Unsaturated soil, collapsible loess and expansion soil borne pathogens pedigree are established with considering density, net respectively
Broad sense soil-water characteristic curve model pedigree that mean stress and deviatoric stress influence；Founded unsaturated soil three-dimensional consolidation it is theoretical and
Its consolidation model pedigree；The groupware of independent research analysis solidification problem, try to achieve the analytic solutions and two of one-dimensional consolidation problem
The numerical solution of solidification problem is tieed up, forms complete theoretical system.But most of unsaturated soil problem that engineering practice runs into is main
Stress direction of principal axis rotates, and existing result of study shows that the mechanical property of the soil body under the conditions of principal stress axis rotation will be sent out
Life significantly changes, and the experimental facilities such as current unsaturated soil direct shear apparatus, consolidation apparatus and triaxial apparatus there is no method to consider the principal axes of stress
The influence of rotation, unsaturated soil intensity caused by principal stress axis rotation and deformation characteristic research there is no method to carry out.
To solve the defects of prior art, the present invention proposes a kind of hollow cylinder pilot system suitable for unsaturated soil,
It is special with unsaturated soils theory under circulation rotating stress path can to meet that the principal axes of stress orientation for controlling and measuring suction condition is sheared
Property experiment requirement, for the strength characteristics of unsaturated soil under the conditions of research principal axes of stress deflection, deformation characteristic, anisotropy and non-
Coaxial characteristic provides test data and scientific basis, can promote to test the development of unsaturated soils theory.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of hollow cylinder pilot system suitable for unsaturated soil, can
To carry out the hollow torsion shear test of unsaturated soil under the conditions of principal stress axis rotation.
In order to solve the above technical problems, the technical solution adopted in the present invention is：It is a kind of to be applied to the hollow of unsaturated soil
Cylinder pilot system, including：Axially controlled with torsion drive device, hollow cylinder balancing gate pit, inside and outside confined pressure, air pressure and back-pressure
Device；Data collecting system and computer control system.
Described axial direction, to reverse drive device be by axial direction（Reverse）Motor and driver composition, including passed by tooth form
Dynamic two brushless type direct current servo motors with driving ball-screw and splined shaft.
The hollow cylinder pressure chamber base is fixed on the top of drive device, hollow cylinder pressure chamber base include it is interior,
Outer confined pressure, air pressure and back-pressure connecting line are simultaneously connected with inside and outside confined pressure, air pressure and back-pressure sensor.Hollow cylinder pressure ceiling
Seat is equipped with interchangeable load torque sensor, and balancing gate pit's top cover is realized by the crane of a connection on an electric motor and risen
Drop operation, makes sample be in suitable position.
Inside and outside confined pressure, air pressure and the backpressure controllers are controlled by associated servo stepper motor, by changing controller volume reality
The control of existing inside and outside confined pressure, air pressure and back-pressure.The air pressure controller is applied to the controller of the air of extremely low rigidity,
Specifications parameter is 2MPa/1000cc air pressures/fixing fabric structure device；The interior confined pressure controller（2）, peripheral pressure controller（1）
And backpressure controllers（3）Suitable for the controller of liquid, specifications parameter is 2MPa/200cc hydraulic pressure/fixing fabric structure device.Controller
What is be inside full of is degassed water, for controlling pore water pressure (back-pressure) and measurement hole water volume change △V.Hole is hollow
Gas is added the change that can be evaluated whether sample cumulative volume with the change of the volume of water.
The hollow cylinder pressure chamber base is inlaid with the high air-entry value pottery clay plates of annular（HAEPD）（11）, so as to open circles
Water in post soil sample can be by that can not pass through the gas that applies.Matric suction is both can control so as to reach and can draining
Purpose, the high air-entry value pottery clay plates venting pressure value 5Bar of annular.
The hollow cylinder pressure chamber base includes inside and outside confined pressure, air pressure and back-pressure air inlet（Water）Pipeline, it can be enclosed by interior
Pressure controller（2）, peripheral pressure controller（1）, gas pressure regulator（4）And backpressure controllers（3）Apply inside and outside confined pressure, air pressure and
Back-pressure；Pressure chamber base and baroceptor（31）And sensor for pore water pressure（29）Be connected, can with the hole air pressure of test sample and
Pore water pressure；The inside and outside confined pressure and backpressure controllers specifications parameter are 2MPa/200cc hydraulic pressure/fixing fabric structure device；The gas
Pressure controller specifications parameter is 2MPa/1000cc air pressures/fixing fabric structure device（4）.
Downward 1/4 position sets local outer wall displacement transducer in the middle part of hollow cylinder balancing gate pit inner chamber（13）And LVDT
Displacement transducer, the radial displacement of test specimen outer wall and axial displacement change can be tested；Sample inwall is equipped with hall effect sensor
, can the radial displacement of test sample inwall and axial displacement change with LVDT displacement transducers；According to experiment inside and outside wall radial direction position
Move and axial displacement change can carry out testing stress analysis.
Hollow cylinder sample bottom and annular pottery clay plates（11）Be connected, so as to back-pressure apply water can by and gas not
It can pass through；Sample top and permeable stone（20）It is connected, permeable stone（20）Top and sample cap（34）It is connected, hole air pressure passes through examination
Sample cap（34）Upper reserving hole channel is connected, and the porous gases in the air and sample that make to apply by gas pressure regulator connect, with amount
Survey, the pore air pressure in control soil sample and the product change of whole sample system hollow gas, so as to the matric suction of Control Assay.
The Signal Conditioning Equipment includes analog signal regulation and digital Signal Regulation.Analog signal regulation includes one 8
The computer board of passage, driving voltage, zeroing can be provided for each sensor and yield value is set.The computer board is arranged on one
Independent device（DIT）It is interior.Data signal regulation solidifies in DIT, including a 8 channel computerized plates are used to connect from HSDAC
Snap into the data signal of motor controller and other equipment.
For the numerical control system based on GDSDCS high-speed figure control systems, the system has displacement and load closed loop
Feedback.GDSDCS is furnished with 16bit data acquisitions（A/D）Control and export with 16bit（D/A）Device, with every passage 10Hz control
Frequency is run, and each circulation can have 1000 data controls and collection point；Each circulation can have 10 000 data during 1Hz
Control and collection point.
The hollow cylinder pilot system of unsaturated soil can control proportional gain by the PID controller of its ownK p, integration
GainK IAnd the differential gainK DCome come realize the sample principal stress axis rotation of different stress paths experiment and orientation shearing test.
Compared with prior art, the beneficial effects of the invention are as follows can be by existing hollow cylinder pilot system basis
On, increase pottery clay plates and air pressure/fixing fabric structure device and pore air pressure sensor, inside/outside wall displacement transducer etc., can
Test the shearing of principal axes of stress orientation and during rotation test unsaturation soil sample inside/outside wall radially, axially with ring displacement and stress.
Apparatus of the present invention structure setting is reasonable, easy to use, meets control and measures the shearing of principal axes of stress orientation and circulation of suction
The requirement of unsaturated soils theory attribute testing under rotating condition, the intensity for unsaturated soil under the conditions of research principal axes of stress deflection are special
Property, deformation characteristic, anisotropy and non co axial characteristic test data and scientific basis are provided, can promote to test unsaturated soils theory
Development.
Brief description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is GDS unsaturated soil hollow cylinder pilot system overall structure figures
Fig. 2 is pressure chamber structure figure
Fig. 3 is balancing gate pit's system communication piping diagram
Fig. 4 is hole air pressure air bleeding valve and baroceptor layout drawing
Fig. 5 is pore water pressure air bleeding valve and hydraulic pressure sensor layout drawing
Wherein：1st, peripheral pressure control system；2nd, interior confined pressure control system；3rd, back-pressure control system；4th, pneumatic control system；5th, number
According to control/acquisition system；6th, computer control system；7th, axle power（Axial displacement）Control system；8th, moment of torsion（Turn round shear angle）Control
System；9th, pore water pressure control valve；10th, hole pressure control valve；11st, high air-entry value pottery clay plates；12nd, external pressure room；13、
Local outer wall displacement transducer；14th, axle power/torque couple sensor；15th, outer confined pressure control valve door；16th, interior confined pressure control valve
Door；17th, back pressure control valve door；18th, pressure control valve；19th, sensor connection cables；20th, permeable stone；21st, interior balancing gate pit；
22nd, periphery press-in mouth；23rd, air pressure inlet；24th, back-pressure entrance；25th, interior confined pressure entrance；26th, hole water out；27th, hole gas goes out
Mouthful；28th, triple valve；29th, pore water pressure sensor；30th, water discharging valve；31st, hole baroceptor；32nd, drain tap；33、
Axle power, moment of torsion loading pedestal；34th, sample cap；35th, shaft position sensor；36th, apparatus frame；37th, instrument base.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of hollow cylinder pilot system suitable for unsaturated soil, including：Axial direction and torsion drive device, hollow cylinder
Balancing gate pit, inside and outside confined pressure, air pressure and backpressure controllers；Signal Conditioning Equipment, numerical control system and computer control system.
Described axial direction, to reverse drive device be by axial direction（Reverse）Motor and driver composition, including passed by tooth form
Dynamic two brushless type direct current servo motors with driving ball-screw and splined shaft.
The hollow cylinder pressure chamber base is fixed on the top of drive device, hollow cylinder pressure chamber base include it is interior,
Outer confined pressure, air pressure and back-pressure connecting line are simultaneously connected with inside and outside confined pressure, air pressure and pore water pressure sensor.Hollow cylinder pressure
Ceiling seat is equipped with interchangeable load torque sensor, and crane of balancing gate pit's top cover by a connection on an electric motor is real
Existing descending operation, makes sample be in suitable position.
Inside and outside confined pressure, air pressure and the backpressure controllers are controlled by associated servo stepper motor, by changing controller volume reality
The control of existing inside and outside confined pressure, air pressure and back-pressure.The air pressure controller is applied to the controller of the air of extremely low rigidity,
Specifications parameter is 2MPa/1000cc air pressures/fixing fabric structure device；The inside and outside confined pressure and backpressure controllers are applied to liquid
Controller, specifications parameter are 2MPa/200cc hydraulic pressure/fixing fabric structure device.What is be full of in controller is degassed water, for control hole
Gap water pressure (back-pressure) and the water volume change of measurement hole.The change of air in hole and the volume of water is added and can be evaluated whether
To the change of sample cumulative volume.
The hollow cylinder pressure chamber base is inlaid with the high air-entry value pottery clay plates of annular（HAEPD）（11）, so as to open circles
Water in post soil sample can be by that can not pass through the gas that applies.Matric suction is both can control so as to reach and can draining
Purpose, the high air-entry value pottery clay plates venting pressure value 5Bar of annular.
The hollow cylinder pressure chamber base includes inside and outside confined pressure, air pressure and back-pressure air inlet（Water）Pipeline, it can be enclosed by interior
Pressure controller（2）, peripheral pressure controller（1）, gas pressure regulator（4）And backpressure controllers（3）Apply inside and outside confined pressure, air pressure and
Back-pressure；Pressure chamber base and baroceptor（31）And sensor for pore water pressure（29）Be connected, can with the hole air pressure of test sample and
Pore water pressure；The inside and outside confined pressure and backpressure controllers specifications parameter are 2MPa/200cc hydraulic pressure/fixing fabric structure device；The gas
Pressure controller specifications parameter is 2MPa/1000cc air pressures/fixing fabric structure device（4）.
Downward 1/4 position sets local outer wall displacement transducer in the middle part of hollow cylinder balancing gate pit inner chamber（13）And LVDT
Displacement transducer, the radial displacement of test specimen outer wall and axial displacement change can be tested；Sample inwall is equipped with hall effect sensor
, can the radial displacement of test sample inwall and axial displacement change with LVDT displacement transducers；According to experiment inside and outside wall radial direction position
Move and axial displacement change can carry out testing stress analysis.
Hollow cylinder sample bottom and annular pottery clay plates（11）Be connected, so as to back-pressure apply water can by and gas not
It can pass through；Sample top and permeable stone（20）It is connected, permeable stone（20）Top and sample cap（34）It is connected, hole air pressure passes through examination
Sample cap（34）Upper reserving hole channel is connected, and the porous gases in the air and sample that make to apply by gas pressure regulator connect, with amount
Survey, the pore air pressure in control soil sample and the product change of whole sample system hollow gas, so as to the matric suction of Control Assay.
The Signal Conditioning Equipment includes analog signal regulation and digital Signal Regulation.Analog signal regulation includes one 8
The computer board of passage, driving voltage, zeroing can be provided for each sensor and yield value is set.The computer board is arranged on one
Independent device（DIT）It is interior.Data signal regulation solidifies in DIT, including a 8 channel computerized plates are used to connect from HSDAC
Snap into the data signal of motor controller and other equipment.
For the numerical control system based on GDSDCS high-speed figure control systems, the system has displacement and load closed loop
Feedback.GDSDCS is furnished with 16bit data acquisitions（A/D）Control and export with 16bit（D/A）Device, with every passage 10Hz control
Frequency is run, and each circulation can have 1000 data controls and collection point；Each circulation can have 10 000 data during 1Hz
Control and collection point.
The hollow cylinder pilot system of unsaturated soil can control proportional gain by the PID controller of its ownK p, integration
GainK IAnd the differential gainK DCome come realize the sample principal stress axis rotation of different stress paths experiment and orientation shearing test.
Test procedure is as follows：
（1）Prepare hollow cylinder sample.Original state sample preparation method is：Soil sample is cut into diameter using soil-cutterΦ=100 mm,h=200 mm cylinder sample.Then cylinder sample is put into casing, cutting for inner core is carried out on interior footpath soil-cutter；Remold sample
Preparation method exists again afterwards to prepare the cylinder sample for having identical dry density and identical size with undisturbed in cylinder casing
Cutting for inner core is carried out on internal diameter soil-cutter, prepares hollow cylinder sample.
（2）Saturation pottery clay plates
1. sample is not filled, each valve in closing presure room, to being full of air free water in balancing gate pit（Such as distilled water）.
2. opening balancing gate pit's water discharging valve and confined pressure valve, apply the kPa of the kPa of confined pressure 300 ~ 400, until draining valve has
More water discharge.
3. rinsing under pottery clay plates the bubble gathered, filling valve is opened, allows air free water to flow through the helicla flute under pottery clay plates, rinsed
30s, close filling valve.
4. the is repeated 3. to walk, until draining valve has continuous water to discharge, removal pressure.
（3）Fill sample
1. the hollow cylinder sample prepared is fixed in sample charging device, and carry out the installation of inner membrance and external mold.Sample charging device is by base
Seat, inner membrance spacer, top cover, cap and support composition.Dress sample mainly divides the installation of inner membrance bottom, external mold installation, top cover install, be interior
Five steps are installed in installation and block at the top of film.When needing to test the strain of hollow cylinder sample local radial, should tried before sample is filled
Tin-foil plate is sticked in downward 1/4 position in the middle part of sample outer wall, in this, as the sensitive surface of local train sensor.Tin-foil plate should meet
It is as far as possible small under sample deformation scope, to reduce the influence to sample stress.
2. removing balancing gate pit's upper cover, the remaining water of clay plate top surface is wiped with wet towel.
3. sample is travelled in balancing gate pit, and sample pedestal is screwed on balancing gate pit's turntable.
4. after sample is positioned, local outer wall displacement transducer is installed（13）With LVDT displacement transducers.
（4）Connecting line
Inside and outside confined pressure, air pressure and backpressure controllers pipeline and corresponding intercommunicating pore in pressure chamber base and balancing gate pit's cap are connected, is made
Inside and outside confined pressure, air pressure and back-pressure pipeline UNICOM.
1. connect internal pressure pipeline
The exhaust of confined pressure access pipeline in carrying out first, after in pipeline without gas after it is connected with top cover internal pressure intercommunicating pore；Afterwards
Internal pressure controller carries out draining control, residual air in sample internal pressure chamber is discharged from internal pressure intercommunicating pore；Wait after the completion of being vented, then will
Internal pressure blast pipe is connected with internal pressure intercommunicating pore；Finally air bleeding valve is opened, then internal pressure controller carries out draining control, treats whole
After the completion of the exhaust of Inner confined pressures pipeline, air bleeding valve is closed.
2. connect back-pressure pipeline
Backpressure controllers access tube is connected with the water inlet pipe of pottery clay plates, outlet pipe is connected with pore water pressure valve, carries out pipeline
After exhaust, pore water pressure valve is closed.
3. connect pneumatic circuit
By gas pressure regulator access tube and sample cap（34）Entrance is connected, and with sample UNICOM.Hole is applied to gas pressure regulator
Atmospheric pressure, make hole air pressure and sample cap（34）Air pressure outlet is connected and is linked into pore air pressure sensor, to measure or
Apply pore air pressure.
4. connect external pressure pipeline
After internal pressure, back-pressure connect with pneumatic circuit, balancing gate pit's outer cover is fallen, and is screwed down, ensures balancing gate pit's sealing.Open
Balancing gate pit's water intaking valve, water filling is carried out to balancing gate pit's exocoel using self prime pump, water-filling is until outlet valve is continuous at the top of balancing gate pit
Untill water outlet, closing presure room outlet valve and water intaking valve, preparation start to test.
（4）The measurement of initial substrate suction
After pipeline connection, the position of shaft position sensor is adjusted, sample is fully fully contacted with pressure chamber base pottery clay plates.
After sample installs, air free water will be full of in balancing gate pit, applies the inside and outside confined pressure of identical numerical value and synchronously apply hole air pressure,
Confined pressure value is higher than the kPa of air pressure 5 ~ 10 inside and outside holding, prevents rubber membrane by spalling.The h of this state about 12 ~ 18 is kept, until hole
After stable water pressure, the initial substrate suction of sample is obtained, is prepared to enter into and tests in next step.
（5）Start computer control system, start to test
Start unsaturated soil testing control module in GDSLAB softwares, realized by backpressure controllers and gas pressure regulator to sample
The control of internal void hydraulic pressure and hole air pressure, is uniformly distributed the hydraulic pressure in sample and air pressure, that is, reaches suction equalization state.
Pass through inner peripheral pressure controller（1）Apply the inside and outside confined pressure of identical numerical value, axial compressive force is applied by axle pressure controller, makes axle
It is equal with the radial stress and circumference stress of sample to stress, carry out each to isotonic consolidation.After sample draining is stable, you can root
Principal axes of stress orientation shearing test and the circulation rotating experiment of suction are controlled to sample according to test objective.
Claims (7)
1. a kind of hollow cylinder pilot system suitable for unsaturated soil, including：Axial direction and torsion drive device, hollow cylinder pressure
Power room, inside and outside confined pressure, air pressure and backpressure controllers；Data collecting system and computer control system；Described axial direction, reverse
Drive device is by axial direction（Reverse）Motor and driver composition, including ball-screw and splined shaft are driven by flat-toothed belt
Two brushless type direct current servo motors；The hollow cylinder pressure chamber base is fixed on the top of drive device, hollow cylinder pressure
Power room base includes inside and outside confined pressure, air pressure and back-pressure connecting line and is connected with inside and outside confined pressure, air pressure and back-pressure sensor；It is empty
Heart cylindrical pressure ceiling seat is equipped with interchangeable load torque sensor, and balancing gate pit's top cover is connected on an electric motor by one
Crane realize descending operation, sample is in suitable position；Inside and outside confined pressure, air pressure and the backpressure controllers are by watching
Stepper motor control is taken, the control of inside and outside confined pressure, air pressure and back-pressure is realized by changing controller volume；The air pressure
Controller is applied to the controller of the air of extremely low rigidity, and specifications parameter is 2MPa/1000cc air pressures/fixing fabric structure device；
The inside and outside confined pressure and backpressure controllers are applied to the controller of liquid, and specifications parameter is 2MPa/200cc hydraulic pressure/fixing fabric structure
Device, what is be full of in controller is degassed water, for controlling pore water pressure (back-pressure) and the water volume change of measurement hole, by hole
Air is added the change that can be evaluated whether sample cumulative volume with the change of the volume of water in gap.
A kind of 2. hollow cylinder pilot system suitable for unsaturated soil according to claim 1, it is characterised in that：It is described
Hollow cylinder pressure chamber base is inlaid with the high air-entry value pottery clay plates of annular（HAEPD）, so that the water in hollow cylinder soil sample can be with
By can not be by and the gas that applies, so as to reach both can control matric suction and can draining purpose, the annular is high
Air-entry value pottery clay plates venting pressure value 5Bar.
A kind of 3. hollow cylinder pilot system suitable for unsaturated soil according to claim 1, it is characterised in that：It is described
Hollow cylinder pressure chamber base includes inside and outside confined pressure, air pressure and back-pressure air inlet（Water）Pipeline, interior confined pressure controller can be passed through（2）、
Peripheral pressure controller（1）, gas pressure regulator（4）And backpressure controllers（3）Apply inside and outside confined pressure, air pressure and back-pressure；Balancing gate pit bottom
Seat is connected with baroceptor and sensor for pore water pressure, can be with the hole air pressure and pore water pressure of test sample；The inside and outside confined pressure
It is 2MPa/200cc hydraulic pressure/fixing fabric structure device with backpressure controllers specifications parameter；The gas pressure regulator specifications parameter is 2MPa/
1000cc air pressures/fixing fabric structure device.
A kind of 4. hollow cylinder pilot system suitable for unsaturated soil according to claim 1, it is characterised in that：It is described
Downward 1/4 position sets local outer wall displacement transducer in the middle part of hollow cylinder balancing gate pit inner chamber（13）With LVDT displacement transducers,
The radial displacement of test specimen outer wall and axial displacement change can be tested；Sample inwall passes equipped with hall effect sensor and LVDT displacements
Sensor, can test sample inwall radial displacement △r iAnd axial displacement △zChange；According to experiment inside and outside wall radial displacement and axle
It can carry out testing stress analysis to change in displacement.
A kind of 5. hollow cylinder pilot system suitable for unsaturated soil according to claim 1, it is characterised in that：It is hollow
Cylinder sample bottom and annular pottery clay plates（11）It is connected, so that the water that back-pressure applies can be by that can not pass through and gas；Sample
Top and permeable stone（20）It is connected, permeable stone（20）Top and sample cap（34）It is connected, hole air pressure passes through sample cap（34）On
Reserving hole channel is connected, and the porous gases in the air and sample that make to apply by gas pressure regulator connect, to measure, control soil sample
In pore air pressure and whole sample system hollow gas product change, so as to Control Assay matric suction.
6. according to a kind of hollow cylinder pilot system suitable for unsaturated soil described in claim 1, it is characterised in that:It is described
Pressure chamber base upper surface be provided with annular pottery clay plates（11）, sample cap（34）Lower surface is provided with permeable stone（20）Plate, examination
Sample and annular pottery clay plates（11）And permeable stone（20）Plate is bottom-up to be enclosed with one layer of rubber membrane, rubber membrane and pressure chamber base and
Sample cap（34）Groove between be provided with annular seal washer.
A kind of 7. hollow cylinder pilot system suitable for unsaturated soil according to claim 1, it is characterised in that：It is non-full
Proportional gain can be controlled by the PID controller of its own with the hollow cylinder pilot system of soilK p, storage gainK IAnd differential
GainK DCome come realize the sample of different stress paths orientation shearing test and principal stress axis rotation experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797829.2A CN107607374A (en) | 2017-09-06 | 2017-09-06 | A kind of hollow cylinder pilot system suitable for unsaturated soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710797829.2A CN107607374A (en) | 2017-09-06 | 2017-09-06 | A kind of hollow cylinder pilot system suitable for unsaturated soil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107607374A true CN107607374A (en) | 2018-01-19 |
Family
ID=61062094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710797829.2A Pending CN107607374A (en) | 2017-09-06 | 2017-09-06 | A kind of hollow cylinder pilot system suitable for unsaturated soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107607374A (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267370A (en) * | 2018-01-31 | 2018-07-10 | 浙江大学 | A kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body |
| CN108896743A (en) * | 2018-08-06 | 2018-11-27 | 中山大学 | A kind of multifunctional visible joint consolidation apparatus device |
| CN109187168A (en) * | 2018-10-25 | 2019-01-11 | 南京工业大学 | Stable and accurate temperature control anisotropic resonance column system and method |
| CN109406365A (en) * | 2018-11-29 | 2019-03-01 | 中国科学院武汉岩土力学研究所 | A kind of three axis gas injection experimental rig of geotechnique and method of fast assembling-disassembling |
| CN109752250A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | Device and method for the synchronous load of external pressure in muddy water diametral compression test |
| CN109959553A (en) * | 2019-03-15 | 2019-07-02 | 浙江大学 | Consolidation-infiltration-shear wave velocity coupling experiment device |
| CN110320112A (en) * | 2019-06-24 | 2019-10-11 | 中国海洋大学 | A kind of gassiness soil stake soil test device |
| CN110514531A (en) * | 2019-08-23 | 2019-11-29 | 水利部交通运输部国家能源局南京水利科学研究院 | Torsion shear type structure and native frictional behavior in-situ testing device and its working method |
| CN110987604A (en) * | 2019-12-18 | 2020-04-10 | 太原理工大学 | Air pressure stabilizing system and method for controlling pore water pressure in coal rock mass creep test |
| CN111198254A (en) * | 2020-03-23 | 2020-05-26 | 长沙理工大学 | Temperature control consolidometer convenient for sample preparation in microscopic test and use method thereof |
| CN111650082A (en) * | 2020-07-22 | 2020-09-11 | 深圳大学 | Unsaturated soil-water characteristic curve measuring device and measuring method |
| CN112378793A (en) * | 2020-12-07 | 2021-02-19 | 中南大学 | Variable-confining pressure dynamic triaxial tester with bidirectional power loading function |
| CN112485131A (en) * | 2020-11-11 | 2021-03-12 | 华能澜沧江水电股份有限公司 | Unsaturated shear strength parameter test device and unsaturated shear strength parameter test method for soil-rock mixture |
| CN112504862A (en) * | 2020-11-10 | 2021-03-16 | 中南大学 | Dynamic and static triaxial apparatus for controlling substrate suction and temperature |
| CN112557168A (en) * | 2020-11-06 | 2021-03-26 | 清华大学 | Stacked ring type hollow torsional shear equipment and pressure compensation method thereof |
| CN112964569A (en) * | 2021-02-19 | 2021-06-15 | 河南城建学院 | Full-automatic temperature control true triaxial apparatus |
| CN113504102A (en) * | 2021-07-16 | 2021-10-15 | 中国科学院武汉岩土力学研究所 | Method and test device for assisting in applying torque in residual soil hollow torsional shear test |
| CN113916702A (en) * | 2021-08-26 | 2022-01-11 | 华东理工大学 | Multi-axis creep-fatigue mechanical property testing device suitable for high-temperature environment |
| CN114384229A (en) * | 2021-12-14 | 2022-04-22 | 中国科学院武汉岩土力学研究所 | Multiphase flow cylindrical model test system and test method |
| CN114791393A (en) * | 2022-03-28 | 2022-07-26 | 河海大学 | Saturation device and method for large-particle-size cohesionless soil hollow cylinder torsional shear test |
| CN115046848A (en) * | 2022-06-30 | 2022-09-13 | 重庆大学 | Unloading simulation test device and simulation test method for surrounding rock excavation of soil-rock mixture tunnel |
| CN112067481B (en) * | 2020-09-02 | 2023-11-21 | 内蒙古大学 | Intelligent geotechnical mechanical parameter testing system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645100A (en) * | 2005-01-24 | 2005-07-27 | 东南大学 | Unsaturated soil solidifying and water characteristic curve combining tester and testing method |
| CN101592574A (en) * | 2009-06-30 | 2009-12-02 | 三峡大学 | Triaxial creep tester of unsaturated soil |
| CN104964878A (en) * | 2015-07-14 | 2015-10-07 | 中国科学院武汉岩土力学研究所 | Triaxial test system and method for unsaturated soil multi-field coupling |
| CN106840847A (en) * | 2017-01-20 | 2017-06-13 | 浙江省水利河口研究院 | For the mortise and tenon component and its application method of hollow cylinder torsional scissor test dress sample equipment |
-
2017
- 2017-09-06 CN CN201710797829.2A patent/CN107607374A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1645100A (en) * | 2005-01-24 | 2005-07-27 | 东南大学 | Unsaturated soil solidifying and water characteristic curve combining tester and testing method |
| CN101592574A (en) * | 2009-06-30 | 2009-12-02 | 三峡大学 | Triaxial creep tester of unsaturated soil |
| CN104964878A (en) * | 2015-07-14 | 2015-10-07 | 中国科学院武汉岩土力学研究所 | Triaxial test system and method for unsaturated soil multi-field coupling |
| CN106840847A (en) * | 2017-01-20 | 2017-06-13 | 浙江省水利河口研究院 | For the mortise and tenon component and its application method of hollow cylinder torsional scissor test dress sample equipment |
Non-Patent Citations (2)
| Title |
|---|
| 张金良: "浙江大学5Hz空心圆柱仪调试研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
| 河海大学《水利大辞典》编辑修订委员会: "《水利大辞典》", 31 October 2015, 上海：上海辞书出版社 * |
Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267370A (en) * | 2018-01-31 | 2018-07-10 | 浙江大学 | A kind of one-dimensional cylinder test device and method for simulating the kinetic head boundary effect soil body |
| CN108896743A (en) * | 2018-08-06 | 2018-11-27 | 中山大学 | A kind of multifunctional visible joint consolidation apparatus device |
| CN108896743B (en) * | 2018-08-06 | 2023-05-23 | 中山大学 | Multifunctional visual combined consolidation apparatus device |
| CN109187168A (en) * | 2018-10-25 | 2019-01-11 | 南京工业大学 | Stable and accurate temperature control anisotropic resonance column system and method |
| CN109406365A (en) * | 2018-11-29 | 2019-03-01 | 中国科学院武汉岩土力学研究所 | A kind of three axis gas injection experimental rig of geotechnique and method of fast assembling-disassembling |
| CN109752250A (en) * | 2019-01-22 | 2019-05-14 | 北京交通大学 | Device and method for the synchronous load of external pressure in muddy water diametral compression test |
| CN109959553B (en) * | 2019-03-15 | 2023-12-01 | 浙江大学 | Consolidation-permeation-shear wave velocity coupling experimental device |
| CN109959553A (en) * | 2019-03-15 | 2019-07-02 | 浙江大学 | Consolidation-infiltration-shear wave velocity coupling experiment device |
| CN110320112A (en) * | 2019-06-24 | 2019-10-11 | 中国海洋大学 | A kind of gassiness soil stake soil test device |
| CN110514531A (en) * | 2019-08-23 | 2019-11-29 | 水利部交通运输部国家能源局南京水利科学研究院 | Torsion shear type structure and native frictional behavior in-situ testing device and its working method |
| CN110987604A (en) * | 2019-12-18 | 2020-04-10 | 太原理工大学 | Air pressure stabilizing system and method for controlling pore water pressure in coal rock mass creep test |
| CN110987604B (en) * | 2019-12-18 | 2022-02-22 | 太原理工大学 | Air pressure stabilizing system and method for controlling pore water pressure in coal rock mass creep test |
| CN111198254A (en) * | 2020-03-23 | 2020-05-26 | 长沙理工大学 | Temperature control consolidometer convenient for sample preparation in microscopic test and use method thereof |
| CN111198254B (en) * | 2020-03-23 | 2022-02-15 | 长沙理工大学 | Temperature control consolidometer convenient for sample preparation in microscopic test and use method thereof |
| CN111650082A (en) * | 2020-07-22 | 2020-09-11 | 深圳大学 | Unsaturated soil-water characteristic curve measuring device and measuring method |
| CN112067481B (en) * | 2020-09-02 | 2023-11-21 | 内蒙古大学 | Intelligent geotechnical mechanical parameter testing system |
| CN112557168A (en) * | 2020-11-06 | 2021-03-26 | 清华大学 | Stacked ring type hollow torsional shear equipment and pressure compensation method thereof |
| CN112504862A (en) * | 2020-11-10 | 2021-03-16 | 中南大学 | Dynamic and static triaxial apparatus for controlling substrate suction and temperature |
| CN112485131A (en) * | 2020-11-11 | 2021-03-12 | 华能澜沧江水电股份有限公司 | Unsaturated shear strength parameter test device and unsaturated shear strength parameter test method for soil-rock mixture |
| CN112378793A (en) * | 2020-12-07 | 2021-02-19 | 中南大学 | Variable-confining pressure dynamic triaxial tester with bidirectional power loading function |
| CN112964569A (en) * | 2021-02-19 | 2021-06-15 | 河南城建学院 | Full-automatic temperature control true triaxial apparatus |
| CN113504102A (en) * | 2021-07-16 | 2021-10-15 | 中国科学院武汉岩土力学研究所 | Method and test device for assisting in applying torque in residual soil hollow torsional shear test |
| CN113916702A (en) * | 2021-08-26 | 2022-01-11 | 华东理工大学 | Multi-axis creep-fatigue mechanical property testing device suitable for high-temperature environment |
| CN114384229A (en) * | 2021-12-14 | 2022-04-22 | 中国科学院武汉岩土力学研究所 | Multiphase flow cylindrical model test system and test method |
| CN114384229B (en) * | 2021-12-14 | 2022-11-01 | 中国科学院武汉岩土力学研究所 | Multiphase flow cylindrical model test system and test method |
| CN114791393A (en) * | 2022-03-28 | 2022-07-26 | 河海大学 | Saturation device and method for large-particle-size cohesionless soil hollow cylinder torsional shear test |
| WO2023184522A1 (en) * | 2022-03-28 | 2023-10-05 | 河海大学 | Saturation device and method for torsional shear tests of large-particle-size non-cohesive soil hollow cylinder |
| NL2031968A (en) * | 2022-03-28 | 2023-10-12 | Univ Hohai | A device and method for saturation of cohesionless Soil with large grain size in hollow cylindrical torsional shear test |
| CN115046848A (en) * | 2022-06-30 | 2022-09-13 | 重庆大学 | Unloading simulation test device and simulation test method for surrounding rock excavation of soil-rock mixture tunnel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107607374A (en) | A kind of hollow cylinder pilot system suitable for unsaturated soil | |
| CN102707034B (en) | Indoor model testing device and testing method employing air-pressure splitting vacuum preloading method | |
| CN103226081B (en) | True triaxial apparatus of unsaturated soil | |
| CN106980014B (en) | Simulate concrete for hydraulic structure corrosion deterioration test device and method under high hydraulic gradient | |
| CN103913289A (en) | Simulating system used for shield tunnel synchronous grouting test and test method thereof | |
| CN106284443B (en) | A kind of test method for simulating bottom-grouting-enlarged Zhuan Kang order bearing capacities | |
| CN105334142B (en) | A kind of experimental provision formed for simulating shield mud film | |
| CN105865874B (en) | A kind of sample preparation device suitable for sandy soil laboratory test | |
| CN109001098B (en) | Soil instantaneous permeability characteristic tester and soil permeability characteristic calculation method | |
| CN206862784U (en) | A kind of indoor Triaxial tester for testing sand slip casting setting strength | |
| CN114279818B (en) | Bidirectional flexible loading and unloading ring shear device and test method thereof | |
| CN206618667U (en) | It is a kind of to be used for the experimental rig of property evolution under simulation concrete cut-pff wall Service Environment | |
| CN106840087A (en) | For the settling column test instrument and test method of pore pressure distribution measuring | |
| US11905812B2 (en) | Intra-layer reinforcement method, and consolidation and reconstruction simulation experiment system and evaluation method for gas hydrate formation | |
| CN102353624A (en) | Plastic concrete permeability test device and its test method | |
| CN111006951A (en) | Indoor grouting test device and simulated grouting test method | |
| CN110847258A (en) | Interface shear test system capable of realizing pile side grouting | |
| CN206450554U (en) | The full water stratum face soil body permeates pressure testing device in three-dimensional stress lower critical | |
| CN107543756A (en) | The experimental rig and test method of simulated rainfall humidifying in a kind of triaxial test | |
| CN108088651A (en) | Potential of Seabed Under Wave Loading dynamic response experimental facilities and analogue experiment method | |
| CN108680430A (en) | A kind of tail residues centrifugal model seepage flow with consolidation control system and test method | |
| CN116907972A (en) | Coarse-grained soil large triaxial tester with seepage pressure control function | |
| CN108387710A (en) | A kind of experimental rig and method for simulating the rectangle head boundary effect soil body | |
| CN207992002U (en) | A kind of experimental rig for simulating the dynamic artesian water effect soil body | |
| CN207730418U (en) | Potential of Seabed Under Wave Loading dynamic response experimental facilities |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180119 |
|
| RJ01 | Rejection of invention patent application after publication |