CN108344639A - A kind of large-scale three dimensional physical model is protected carry pilot system and method for a long time - Google Patents
A kind of large-scale three dimensional physical model is protected carry pilot system and method for a long time Download PDFInfo
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- CN108344639A CN108344639A CN201810106803.3A CN201810106803A CN108344639A CN 108344639 A CN108344639 A CN 108344639A CN 201810106803 A CN201810106803 A CN 201810106803A CN 108344639 A CN108344639 A CN 108344639A
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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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
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of large-scale three dimensional physical model protects pilot system and the method for carrying for a long time, and system includes pedestal, anti-deformation prestressing force loading frame component, load applies component, prepared by model sample and transport component and hydraulic loading system component；Prepared by anti-deformation prestressing force loading frame component and model sample is arranged at transport component on pedestal, load applies component and is arranged on anti-deformation prestressing force loading frame component, load applies component and is connected with hydraulic loading system component, apply component by load with hydraulic loading system component to coordinate, the long-time under the progress multi-panel multi-point cooperative control of model sample is protected and is carried.The large-scale three dimensional physical model that the present invention has under the control of multi-panel multi-point cooperative protects loading capability for a long time, using the frame structure of brand-new design, can effectively control the self-deformation of testing equipment in loading procedure, improve test data confidence level；Be equipped with preparation and the conveyer of artificial model's sample for the first time, meet artificial model's sample preparatory phase accuracy detection.
Description
Technical field
The invention belongs to large-scale three dimensional physical experiments technical fields, more particularly to a kind of large-scale three dimensional physical model
It protects for a long time and carries pilot system and method.
Background technology
Large-scale three dimensional physical experiments are similar with engineering rock mass property artificial by configuring based on the theory of similarity
Cast material carries out the cutting under different boundary loading environment and monitoring test, can effectively disclose rock mass in Human dried bloodstains
Under the influence of deformation fracture evolution mechanism.
Currently, large-scale three dimensional physical experiments have obtained relatively broad application, still, with underground engineering construction with
Resource exploitation is constantly marched to deep, and the scale of construction and complexity of deep tunnel group are also being continuously improved, in scientific research and work
In Cheng Yingyong, the technology of large-scale three dimensional physical experiments is required also higher and higher.
According to field monitoring as a result, it was confirmed that within a certain period of time, deformation and the rupture of country rock body can increase with the time,
Especially in the underground engineering of deep, due to the high-ground stress environment of country rock preservation, causes to enclose rock mass deformation and usually need the several months
Even longer time just can Complete Convergence, i.e., buried hard rock long-time load effect under will produce season cracking phenomenon, therefore
There is important theory and practical significance for the research of buried hard rock season cracking rule, also directly concerning deep-buried underground engineering
Long-term safety operation.
Currently, for the research of rock mass season cracking mechanism, opened generally by means of rock normal triaxial rheology testing machine
Exhibition also has equipment to conduct a research for the Mineral rheology mechanical characteristic under the conditions of true triaxial, however, be normal triaxial, also or
True triaxial rheological test machine, be all based on small size rock sample development, specimen size be only 50mm × 50mm × 100mm or
φ50mm×100mm.And field is tested in the analog material three-dimensional physical model of meter level scale, it there is no to have and protect load energy for a long time
The three-dimensional loading tester of power, so that grinding in terms of large scale three-dimensional physical model season cracking under more stress gradients can not be carried out
Study carefully；Simultaneously as the rheology characteristic of rock mass has inseparable relationship with the different scale structural plane of preservation in rock mass,
The research of these problem in science, also there is an urgent need for carry out by large-scale three dimensional physical experiments.
In addition, as artificial model's size and testing machine load the continuous improvement of tonnage, especially artificial model's material is strong
The continuous improvement of degree, the reaction frame structure of existing three-dimensional physical model testing machine can not have been efficiently controlled and loaded
The deformation of testing machine itself in journey；Simultaneously as the preparation and load of artificial model are carried out in the same babinet, cause
The preparation precision of artificial model can not detect.
Therefore, research and development are a set of can be towards the large-scale deep tunnel group three-dimensional physical model of deep engineering rock mass mechanics problem
It protects load pilot system for a long time and method is imperative.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of large-scale three dimensional physical model long-time guarantor load experiment system
System and method, the long-time having for the first time under the control of multi-panel multi-point cooperative protects loading capability, and uses the pre- of brand-new design
Stress frame structure can effectively control the self-deformation of testing equipment in loading procedure, improve test data confidence level；For the first time
It is equipped with preparation and the conveyer of artificial model's sample, the preparation region of artificial model's sample and loading area are effectively divided
From meeting artificial model's sample in the accuracy detection of preparatory phase, artificial model's sample avoided to cause pair because preparing precision deficiency
The influence of test data.
To achieve the goals above, the present invention adopts the following technical scheme that：A kind of large-scale three dimensional physical model long-time guarantor
Pilot system is carried, including pedestal, anti-deformation prestressing force loading frame component, load apply component, prepared by model sample and transport
Component and hydraulic loading system component；The anti-deformation prestressing force loading frame component and model sample prepare equal with transport component
It is set on the base, the load applies component and is arranged on anti-deformation prestressing force loading frame component, the load application group
Part is connected with hydraulic loading system component, and applying component and hydraulic loading system component by load coordinates, to model sample into
Long-time under the control of row multi-panel multi-point cooperative, which is protected, to be carried.
The anti-deformation prestressing force loading frame component includes central frame, front end frame and rearward end frame, the centre
Frame is between front end frame and rearward end frame；
The central frame uses more Pin formulas hollow structures, and the central frame of every Pin is by head piece, left column, the right side
Column and cross member composition, and two Pin central frames of arbitrary neighborhood are all made of removable assembling structure and are connected；Under the cross member
Surface is equipped with central frame sliding block, and surface is equipped with frame guide rail on the base, makes centre by central frame sliding block
Frame has linear movement degree of freedom on frame guide rail；The hollow inner cavity of the central frame is model sample LOADED CAVITY；
The front end frame includes left counter-force vertical beam, right counter-force vertical beam, counter-force crossbeam and counter-force beam support；It is described left anti-
Power vertical beam and right counter-force vertical beam are symmetrically packed on counter-force crossbeam, and the counter-force beam support is connected in counter-force crossbeam lower surface,
Front end frame sliding block is installed in counter-force beam support lower surface, makes front end frame on frame guide rail by front end frame sliding block
With linear movement degree of freedom；It is opened up in the middle part beam body of the counter-force crossbeam there are one through-hole, which tries as model
Sample digs hole, and model sample digs hole and model sample LOADED CAVITY face；At the left counter-force vertical beam and right counter-force vertical beam bottom
It is respectively connected with front end frame driving hydraulic cylinder between end and pedestal, and front end frame driving hydraulic cylinder is parallel with frame guide rail；
The rearward end frame includes left support vertical beam, right support vertical beam, support beam and support beam bearing；The left branch
Support vertical beam and right support vertical beam are symmetrically packed in support beam, and the support beam bearing is connected in support beam lower surface,
Rearward end frame sliding block is installed in support beam bearing lower surface, makes rearward end frame on frame guide rail by rearward end frame sliding block
With linear movement degree of freedom；It is all connected between the left support vertical beam and right support vertical beam bottom end and central frame cross member
There is middle rearward end frame driving hydraulic cylinder, and middle rearward end frame driving hydraulic cylinder is parallel with frame guide rail；
Between the left counter-force vertical beam and left support vertical beam, between right counter-force vertical beam and right support vertical beam, counter-force cross
It is connected by prestressed draw-bar between beam and support beam, is opened on the head piece, left column, right column and cross member
Equipped with pull rod through hole；By applying pretightning force to prestressed draw-bar, realize between central frame, front end frame and rearward end frame
Prestressing force locking.
It includes first level actuator group, the second horizontal actuator group, the horizontal actuator of third that the load, which applies component,
Group and vertical actuator group；The left column medial surface in central frame, second water is arranged in the first level actuator group
The right column medial surface in central frame is arranged in flat actuator group, and the branch in rearward end frame is arranged in the horizontal actuator group of third
Cross rail inner face is supportted, the vertical actuator group is arranged in the head piece lower surface of central frame；The first level actuator
Include several to be uniformly arranged and tie in group, the second horizontal actuator group, the horizontal actuator group of third and vertical actuator group
The identical monomer actuator of structure；The monomer actuator includes counter-force hydraulic cylinder, rectangle load plate and magnetostrictive displacement sensing
Device；The counter-force hydraulic cylinder is connected in by cylinder barrel on frame, and the rectangle load plate is perpendicularly fixedly arranged on the work of counter-force hydraulic cylinder
Stopper rod top offers acoustic emission probe cloth apertured in rectangle load plate；The magnetostrictive displacement sensor is connected to instead
Between power Barrel of Hydraulic Cylinders and rectangle load plate.
It includes that model sample prepares case, model sample plummer, model sample that the model sample, which prepares and transports component,
Conveying rack, conveying rack driving hydraulic cylinder and plummer driving hydraulic cylinder；Surface is equipped with conveying rack guide rail on the base, fortune
Send frame guide rail and frame guide rail perpendicular, the mounting height of conveying rack guide rail is more than frame guide rail, and with frame guide rail intersection
Conveying rack guide rail use spliced removable assembling structure；Conveying rack sliding block is installed in the model sample conveying rack lower surface,
Make model sample conveying rack that there is linear movement degree of freedom on conveying rack guide rail by conveying rack sliding block；The model sample is held
Microscope carrier is arranged on model sample conveying rack, plummer guide rail is equipped in model sample conveying rack upper surface, in model sample
Plummer lower surface is equipped with plummer idler wheel, so that model sample plummer is had on plummer guide rail by plummer idler wheel
Move linearly degree of freedom；Cross member upper surface in the model sample LOADED CAVITY of the central frame is equipped with carrying platform switching
Guide rail makes model sample plummer have linear movement degree of freedom on plummer guide rail by plummer idler wheel；The transport
Frame driving hydraulic cylinder is connected between pedestal and model sample conveying rack, and conveying rack driving hydraulic cylinder is equal with conveying rack guide rail
Row；The plummer driving hydraulic cylinder is connected between model sample conveying rack and model sample plummer, and plummer drives liquid
Cylinder pressure is parallel with plummer guide rail and carrying platform switching guide rail, is held in piston rod and the model sample of plummer driving hydraulic cylinder
It is connected by lockset between microscope carrier；The model sample prepares case and is located at model sample plummer upper surface.
The hydraulic loading system component includes computer, controller, static loading oil sources, static loading separator and quiet
State loading oil circuit；The computer is connected with controller, and controller is connected with static loading oil sources, and static loading oil sources passes through quiet
State loads separator and at least static loading oil circuit is connected all the way；
The static loading oil circuit includes the first electrohydraulic servo valve, the first electromagnet cut off valve and the second electromagnet cut off valve；Institute
The first oil inlet for stating the first electrohydraulic servo valve is connected with static loading separator, in the first oil outlet of the first electrohydraulic servo valve
A monomer actuator at least in parallel between the second oil inlet, the second oil outlet and the static loading oil of the first electrohydraulic servo valve
Source is connected；First electromagnet cut off valve is mounted on the pipe between the first oil outlet and monomer actuator of the first electrohydraulic servo valve
On the road, second electromagnet cut off valve is mounted on the pipeline between the second oil inlet and monomer actuator of the first electrohydraulic servo valve
On；Static load voltage stabilizing oil circuit is connected on pipeline between first electromagnet cut off valve and monomer actuator side by side and static pressure is protected
Carry oil circuit；The static load voltage stabilizing oil circuit includes the first accumulator and third electromagnet cut off valve, and the first accumulator passes through third electromagnetism
Shut-off valve is connected with monomer actuator, and first pressure is equipped on the pipeline between third electromagnet cut off valve and monomer actuator
Sensor；It includes protecting carrier gas source, gas-liquid booster pump, the 4th electromagnet cut off valve and check valve that the static pressure, which is protected and carries oil circuit, protects carrier gas
Source is connected with gas-liquid booster pump, and gas-liquid booster pump is connected by the 4th electromagnet cut off valve with the liquid feeding end of check valve, check valve
Outlet end is connected with monomer actuator；It is equipped with second on pipeline between second electromagnet cut off valve and monomer actuator
Pressure sensor.
A kind of large-scale three dimensional physical model long-time guarantor load test method, it is long to use the large-scale three dimensional physical model
Time, which protects, carries pilot system, includes the following steps：
Step 1：Analog material is chosen according to test requirements document, mould is carried out using analog material in model sample prepares case
The preparation of type sample, and pre-buried monitoring sensor in model sample；
Step 2：After model sample reaches initial strength, model sample is demoulded, while detection model sample
Flatness, verticality and compactness, it is ensured that all qualifieds of model sample；
Step 3：First model sample conveying rack is moved to immediately ahead of model sample LOADED CAVITY, then holds model sample
Microscope carrier is moved in model sample LOADED CAVITY, and model sample enters model sample LOADED CAVITY with model sample plummer at this time
In, then the locking between model sample plummer and model sample conveying rack is released, finally model sample conveying rack is moved back to
Initial position；
Step 4：Anti-deformation prestressing force loading frame component is adjusted to closed state from open state, so that middle boxes
Frame, front end frame and rearward end frame form an entirety；
Step 5：First level actuator group, the second horizontal actuator group, the horizontal actuator group of third are controlled respectively and are erected
Straight actuator group action, the precise alignment until completing model sample clamp；
Step 6：Using multi-panel multi-point cooperative control mode control first level actuator group, the second horizontal actuator group,
The horizontal actuator group of third and vertical actuator group carry out true triaxial static loading to model sample, then add in the static(al) of setting
It carries and model sample is implemented to dig under level, while the deformation fracture evolution condition of observation model sample；
Step 7：After the completion of cutting, stress state is switched to load state of protecting for a long time, and the timeliness of observation model sample
Failure evolvement situation；
Step 8：First level actuator group, the second horizontal actuator group, the horizontal actuator group of third are controlled respectively and are erected
Straight actuator group action, completes the unloading of model sample；
Step 9：First model sample conveying rack is moved to immediately ahead of model sample LOADED CAVITY, then holds model sample
Microscope carrier is locked with model sample conveying rack, then by model sample plummer out of model sample LOADED CAVITY with to model sample
On conveying rack, model sample conveying rack is finally moved back into initial position, and be further analyzed to the model sample of taking-up
Research.
Protecting the rate-determining steps carried for a long time is：
Step 1：In a computer on setting model sample each loading surface static load charge values, and it is each in each loading surface
The static load charge values all same or not all the same of monomer actuator output；
Step 2：The first electromagnet cut off valve and the second electromagnet cut off valve in static loading oil circuit are opened, static load voltage stabilizing is opened
Third electromagnet cut off valve in oil circuit closes static pressure and protects the 4th electromagnet cut off valve carried in oil circuit；
Step 3：Start static loading oil sources, static loading is carried out to model sample according to the static load charge values of setting, when quiet
When instantaneous pressure in state loading oil circuit increases, pressure energy can be stored in the first accumulator in the form of compression energy, work as static state
When instantaneous pressure in loading oil circuit reduces, the compression energy in the first accumulator can add in static loading oil circuit, ensure quiet
The pressure of state loading oil circuit is steady；
Step 4：After static loading reaches setting value, the first electromagnet cut off valve and second in static loading oil circuit is closed
Electromagnet cut off valve closes the third electromagnet cut off valve in static load voltage stabilizing oil circuit, opens static pressure and protects the 4th electromagnetism section carried in oil circuit
Only valve；
Step 5：Static loading oil sources is closed, pressurize pattern starts, with the increase of load time, when static loading oil circuit
In pressure when dropping to setting value or less, static pressure protects the gas-liquid pressure-boosting pump startup carried in oil circuit, by gas-liquid booster pump to quiet
The oil pressure that loss is supplemented in state loading oil circuit closes gas-liquid booster pump at this time until pressure recovery to setting value.
Beneficial effects of the present invention：
Compared with prior art, the present invention the large-scale three dimensional physical model having for the first time under the control of multi-panel multi-point cooperative is long
Time protects loading capability, and uses the pre-stressed concrete frame structure of brand-new design, can effectively control experiment in loading procedure and set
Standby self-deformation improves test data confidence level；It is equipped with preparation and the conveyer of artificial model's sample for the first time, it will be artificial
The preparation region of model sample and loading area efficiently separate, and meet artificial model's sample in the accuracy detection of preparatory phase, keep away
Manpower-free's model sample leads to the influence to test data because preparing precision deficiency.
Description of the drawings
Fig. 1 is that a kind of large-scale three dimensional physical model of the present invention protects load pilot system (open state) structural representation for a long time
Figure；
Fig. 2 is that a kind of large-scale three dimensional physical model of the present invention protects load pilot system (closed state) structural representation for a long time
Figure；
Fig. 3 is the middle frame structure schematic diagram of the anti-deformation prestressing force loading frame component of the present invention；
Fig. 4 is the front end frame structural schematic diagram of the anti-deformation prestressing force loading frame component of the present invention；
Fig. 5 is the rearward end frame structural schematic diagram of the anti-deformation prestressing force loading frame component of the present invention；
Fig. 6 is that the load of the present invention applies the monomer actuator configurations schematic diagram of component；
Fig. 7 is that the model sample of the present invention prepares and transports component structure diagram；
Fig. 8 is the portions I enlarged drawing in Fig. 1；
Fig. 9 is the schematic diagram of the hydraulic loading system component of the present invention；
In figure, 1-pedestal, 2-anti-deformation prestressing force loading frame components, 3-load application component, 4-model samples
It prepares and transports component, 5-head pieces, 6-left columns, 7-right columns, 8-cross members, 9-central frame sliding blocks, 10-frames
Frame guide rail, 11-model sample LOADED CAVITYs, 12-left counter-force vertical beams, 13-right counter-force vertical beams, 14-counter-force crossbeams, 15-counter-forces
Beam support, 16-front end frame sliding blocks, 17-model samples cutting hole, 18-left support vertical beams, 19-right support vertical beams,
20-support beams, 21-support beam bearings, 22-rearward end frame sliding blocks, 23-first level actuator groups, 24-the second
Horizontal actuator group, the horizontal actuator group of 25-thirds, 26-vertical actuator groups, 27-counter-force hydraulic cylinders, 28-rectangles add
Support plate, 29-magnetostrictive displacement sensors, 30-acoustic emission probe cloth apertured, 31-model samples prepare case, 32-models
Sample plummer, 33-model sample conveying racks, 34-conveying rack driving hydraulic cylinders, 35-plummer driving hydraulic cylinders, 36-
Conveying rack guide rail, 37-conveying rack sliding blocks, 38-plummer guide rails, 39-plummer idler wheels, 40-carrying platform switching guide rails,
41-locksets, 42-front end frame driving hydraulic cylinders, 43-middle rearward end frame driving hydraulic cylinders, 44-prestressed draw-bars, 45-
Pull rod through hole, 46-computers, 47-controllers, 48-static loading oil sources, 49-second pressure sensors, 50-is static
Load separator, 51-check valves, the 52-the first electrohydraulic servo valve, the 53-the first electromagnet cut off valve, the cut-off of the 54-the second electromagnetism
Valve, 55-monomer actuator, the 56-the first accumulator, 57-third electromagnet cut off valve, 58-first pressure sensors, 59-protect
Carrier gas source, 60-gas-liquid booster pumps, the 61-the four electromagnet cut off valve.
Specific implementation mode
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Fig. 1~9, a kind of large-scale three dimensional physical model guarantor's load pilot system, including pedestal 1, anti-deformation for a long time
Prestressing force loading frame component 2, load apply component 3, prepared by model sample and transport component 4 and hydraulic loading system component；
Prepared by the anti-deformation prestressing force loading frame component 2 and model sample is arranged at transport component 4 on pedestal 1, the load
Lotus applies component 3 and is arranged on anti-deformation prestressing force loading frame component 2, and the load applies component 3 and hydraulic loading system
Component is connected, and apply component 3 by load coordinates with hydraulic loading system component, and multi-panel multi-point cooperative control is carried out to model sample
Long-time under system, which is protected, to be carried.
The anti-deformation prestressing force loading frame component 2 includes central frame, front end frame and rearward end frame, the centre
Frame is between front end frame and rearward end frame；
The central frame uses more Pin formulas hollow structures, the central frame of every Pin by head piece 5, left column 6,
Right column 7 and cross member 8 form, and two Pin central frames of arbitrary neighborhood are all made of removable assembling structure and are connected；In bottom cross
8 lower surface of beam is equipped with central frame sliding block 9, is equipped with frame guide rail 10 in 1 upper surface of the pedestal, is slided by central frame
Block 9 makes central frame have linear movement degree of freedom on frame guide rail 10；The hollow inner cavity of the central frame is model
Sample LOADED CAVITY 11；
The front end frame includes left counter-force vertical beam 12, right counter-force vertical beam 13, counter-force crossbeam 14 and counter-force beam support 15；
The left counter-force vertical beam 12 and right counter-force vertical beam 13 are symmetrically packed on counter-force crossbeam 14, and the counter-force beam support 15 is connected in
14 lower surface of counter-force crossbeam is equipped with front end frame sliding block 16 in 15 lower surface of counter-force beam support, passes through front end frame sliding block
16 make front end frame have linear movement degree of freedom on frame guide rail 10；It is opened up in the middle part beam body of the counter-force crossbeam 14
There are one through-hole, which digs hole 17 as model sample, and model sample is digging hole 17 and model sample LOADED CAVITY 11 just
It is right；It is respectively connected with front end frame driving hydraulic cylinder between the left counter-force vertical beam 12 and right 13 bottom end of counter-force vertical beam and pedestal 1
42, and front end frame driving hydraulic cylinder 42 is parallel with frame guide rail 10；
The rearward end frame includes left support vertical beam 18, right support vertical beam 19, support beam 20 and support beam bearing 21；
The left support vertical beam 18 and right support vertical beam 19 are symmetrically packed in support beam 20, and the support beam bearing 21 is connected in
20 lower surface of support beam is equipped with rearward end frame sliding block 22 in 21 lower surface of support beam bearing, passes through rearward end frame sliding block
22 make rearward end frame have linear movement degree of freedom on frame guide rail 10；In the left support vertical beam 18 and right support vertical beam 19
Middle rearward end frame driving hydraulic cylinder 43 is respectively connected between bottom end and central frame cross member 8, and middle rearward end frame drives hydraulic pressure
Cylinder 43 is parallel with frame guide rail 10；
Between the left counter-force vertical beam 12 and left support vertical beam 18, right counter-force vertical beam 13 and right support vertical beam 19 it
Between, be connected by prestressed draw-bar 44 between counter-force crossbeam 14 and support beam 20, in the head piece 5, left column 6, right
Pull rod through hole 45 is offered on column 7 and cross member 8；By applying pretightning force to prestressed draw-bar 44, middle boxes are realized
Prestressing force locking between frame, front end frame and rearward end frame.
It includes first level actuator group 23, the second horizontal actuator group 24, third level work that the load, which applies component 3,
Dynamic device group 25 and vertical actuator group 26；6 medial surface of left column in central frame is arranged in the first level actuator group 23,
The second horizontal actuator group 24 is arranged 7 medial surface of right column in central frame, and the horizontal actuator group of the third 25 is set
20 medial surface of support beam in rearward end frame is set, 5 following table of head piece in central frame is arranged in the vertical actuator group 26
Face；The first level actuator group 23, the second horizontal actuator group 24, the horizontal actuator group 25 of third and vertical actuator group
Include several be uniformly arranged and the identical monomer actuator of structure in 26；The monomer actuator includes counter-force hydraulic cylinder
27, rectangle load plate 28 and magnetostrictive displacement sensor 29；The counter-force hydraulic cylinder 27 is connected in by cylinder barrel on frame, institute
The piston rod top that rectangle load plate 28 is perpendicularly fixedly arranged on counter-force hydraulic cylinder 27 is stated, acoustic emission is opened up in rectangle load plate 28
Probe cloth apertured 30；The magnetostrictive displacement sensor 29 be connected to 27 cylinder barrel of counter-force hydraulic cylinder and rectangle load plate 28 it
Between.
Prepared by the model sample prepares case 31, model sample plummer 32, model with transport component 4 including model sample
Sample conveying rack 33, conveying rack driving hydraulic cylinder 34 and plummer driving hydraulic cylinder 35；Fortune is installed in 1 upper surface of the pedestal
Frame guide rail 36 is sent, conveying rack guide rail 36 and frame guide rail 10 are perpendicular, and the mounting height of conveying rack guide rail 36 is more than frame guide rail
10, and use spliced removable assembling structure with the conveying rack guide rail 36 of 10 intersection of frame guide rail；It is transported in the model sample
33 lower surface of frame is equipped with conveying rack sliding block 37, makes model sample conveying rack 33 in conveying rack guide rail 36 by conveying rack sliding block 37
It is upper that there is linear movement degree of freedom；The model sample plummer 32 is arranged on model sample conveying rack 33, in model sample
33 upper surface of conveying rack is equipped with plummer guide rail 38, and plummer idler wheel 39 is equipped in 32 lower surface of model sample plummer,
Make model sample plummer 32 that there is linear movement degree of freedom on plummer guide rail 38 by plummer idler wheel 39；In described
Between frame model sample LOADED CAVITY 11 in 8 upper surface of cross member carrying platform switching guide rail 40 is installed, rolled by plummer
Wheel 39 makes model sample plummer 32 have linear movement degree of freedom on plummer guide rail 38；The conveying rack driving hydraulic cylinder
34 are connected between pedestal 1 and model sample conveying rack 33, and conveying rack driving hydraulic cylinder 34 is parallel with conveying rack guide rail 36；Institute
It states plummer driving hydraulic cylinder 35 to be connected between model sample conveying rack 33 and model sample plummer 32, plummer drives liquid
Cylinder pressure 35 is parallel with plummer guide rail 38 and carrying platform switching guide rail 40, in the piston rod and mould of plummer driving hydraulic cylinder 35
It is connected by lockset 41 between type sample plummer 32；The model sample prepares case 31 and is located at 32 upper table of model sample plummer
Face.
The hydraulic loading system component includes computer 46, controller 47, static loading oil sources 48, static loading point oil
Device 50 and static loading oil circuit；The computer 46 is connected with controller 47, and controller 47 is connected with static loading oil sources 48, quiet
State load oil sources 48 by static loading separator 50 at least static loading oil circuit is connected all the way；
The static loading oil circuit includes the first electrohydraulic servo valve 52, the first electromagnet cut off valve 53 and the second electromagnet cut off valve
54；First oil inlet of first electrohydraulic servo valve 52 is connected with static loading separator 50, in the first electrohydraulic servo valve 52
The first oil outlet and the second oil inlet between a monomer actuator 55 at least in parallel, the second of the first electrohydraulic servo valve 52 goes out
Hydraulic fluid port is connected with static loading oil sources 48；First electromagnet cut off valve 53 is mounted on the first fuel-displaced of the first electrohydraulic servo valve 52
On pipeline between mouth and monomer actuator 55, second electromagnet cut off valve 54 is mounted on the second of the first electrohydraulic servo valve 52
On pipeline between oil inlet and monomer actuator 55；Pipe between first electromagnet cut off valve 53 and monomer actuator 55
Road is connected with static load voltage stabilizing oil circuit side by side and static pressure is protected and carries oil circuit；The static load voltage stabilizing oil circuit includes the first accumulator 56 and the
Three electromagnet cut off valve 57, the first accumulator 56 is connected by third electromagnet cut off valve 57 with monomer actuator 55, in third electromagnetism
First pressure sensor 58 is installed on the pipeline between shut-off valve 57 and monomer actuator 55；The static pressure protects load oil circuit
Carrier gas source 59, gas-liquid booster pump 60, the 4th electromagnet cut off valve 61 and check valve 51 are protected, carrier gas source 59 and 60 phase of gas-liquid booster pump are protected
Even, gas-liquid booster pump 60 is connected by the 4th electromagnet cut off valve 61 with the liquid feeding end of check valve 51, the outlet end of check valve 51 and
Monomer actuator 55 is connected；The second pressure is installed on pipeline between second electromagnet cut off valve 54 and monomer actuator 55
Force snesor 49.
In the present embodiment, system uses cpci bus technology, and realizes that logic control, system are provided with 12 altogether by PLC
A independent control channel, wherein in first level actuator group 23, the second horizontal actuator group 24 and vertical actuator group 26
Include 12 monomer actuator 55, is divided into 4 layers, every layer there are 3；The horizontal actuator group 25 of third is interior to be made comprising 16 monomers
Dynamic device 55, is divided into 4 layers, every layer has 4；Since first level actuator group 23 and the second horizontal actuator group 24 are symmetrically divided
Cloth sets totally 6 monomer actuator 55 in two actuator groups positioned at same layer and shares a control channel, then two starts
Device group distributes 4 control channels altogether；26 every layer of 3 monomer actuator 55 of vertical actuator group distributes a control channel, amounts to
Distribute 4 control channels；The horizontal 25 every layer of 4 monomer actuator 55 of actuator group of third distributes a control channel, Gong Jifen
With 4 control channels.
In the present embodiment, model sample prepares case 31 and uses the widget layering fragment of finishing assembled, Ge Geling
The dimensional discrepancy of component is less than 1mm, and model sample prepares case 31 and is divided into 8 layers in the height direction, per floor height 250mm, always
A height of 2000mm；Include 3 widgets in width direction, it is 2000 × 2000mm × 500mm, 2000 that can be assembled into size respectively
The model sample of × 2000mm × 1000mm and 2000mm × 2000mm × 1500mm prepares case 31, and then can prepare corresponding size
Model sample.Model sample prepares case 31 and uses high rigidity sidewise restraint, it is ensured that in the Gravitative Loads of model sample
Under, the self-deformation that model sample prepares case 31 is effectively controlled.The babinet that model sample prepares case 31 is laterally reserved with prison
The line outlet of survey sensor is provided with antifriction layer in interior.Model sample plummer 32 is not less than using thickness
The high rigidity steel plate of 300mm is made, the deformation that can be effectively controlled under model sample Gravitative Loads.
A kind of large-scale three dimensional physical model long-time guarantor load test method, it is long to use the large-scale three dimensional physical model
Time, which protects, carries pilot system, includes the following steps：
Step 1：Analog material is chosen according to test requirements document, is carried out using analog material in model sample prepares case 31
The preparation of model sample, and pre-buried monitoring sensor in model sample；
Step 2：After model sample reaches initial strength, model sample is demoulded, while detection model sample
Flatness, verticality and compactness, it is ensured that all qualifieds of model sample；
Step 3：Model sample conveying rack 33 is first moved to 11 front of model sample LOADED CAVITY, then tries model
Sample plummer 32 is moved in model sample LOADED CAVITY 11, and model sample is tried as model sample plummer 32 enters model at this time
In sample LOADED CAVITY 11, then the locking between model sample plummer 32 and model sample conveying rack 33 is released, finally tries model
Sample conveying rack 33 moves back to initial position；
Step 4：Anti-deformation prestressing force loading frame component 2 is adjusted to closed state from open state, so that middle boxes
Frame, front end frame and rearward end frame form an entirety；
Step 5：Control first level actuator group 23, the second horizontal actuator group 24, the horizontal actuator group of third respectively
25 and vertical actuator group 26 act, the precise alignment until completing model sample clamps；
Step 6：Using multi-panel multi-point cooperative control mode control first level actuator group 23, the second horizontal actuator
Group 24, the horizontal actuator group 25 of third and vertical actuator group 26 carry out true triaxial static loading to model sample, are then setting
Model sample is implemented to dig under fixed static loading level, while the deformation fracture evolution condition of observation model sample；
Step 7：After the completion of cutting, stress state is switched to load state of protecting for a long time, and the timeliness of observation model sample
Failure evolvement situation；
Step 8：Control first level actuator group 23, the second horizontal actuator group 24, the horizontal actuator group of third respectively
25 and vertical actuator group 26 act, complete the unloading of model sample；
Step 9：Model sample conveying rack 33 is first moved to 11 front of model sample LOADED CAVITY, then tries model
Sample plummer 32 is locked with model sample conveying rack 33, then by model sample plummer 32 out of model sample LOADED CAVITY 11
To on model sample conveying rack 33, model sample conveying rack 33 is finally moved back to initial position, and try the model of taking-up
Sample is further analyzed research.
Protecting the rate-determining steps carried for a long time is：
Step 1：In computer 46 on setting model sample each loading surface static load charge values, and it is each in each loading surface
The static load charge values all same or not all the same that a monomer actuator 55 exports；
Step 2：The first electromagnet cut off valve 53 and the second electromagnet cut off valve 54 in static loading oil circuit are opened, static load is opened
Third electromagnet cut off valve 57 in voltage stabilizing oil circuit closes static pressure and protects the 4th electromagnet cut off valve 61 carried in oil circuit；
Step 3：Start static loading oil sources 48, static loading is carried out to model sample according to the static load charge values of setting, when
When instantaneous pressure in static loading oil circuit increases, pressure energy can be stored in the form of compression energy in the first accumulator 56, when
When instantaneous pressure in static loading oil circuit reduces, the compression energy in the first accumulator 56 can add in static loading oil circuit,
Ensure that the pressure of static loading oil circuit is steady；
Step 4：After static loading reaches setting value, the first electromagnet cut off valve 53 in static loading oil circuit and the are closed
Two electromagnet cut off valve 54 close the third electromagnet cut off valve 57 in static load voltage stabilizing oil circuit, open static pressure and protect the 4th carried in oil circuit
Electromagnet cut off valve 61；
Step 5：Static loading oil sources 48 is closed, pressurize pattern starts, with the increase of load time, when static loading oil
When pressure in road drops to setting value or less, static pressure is protected the gas-liquid booster pump 60 carried in oil circuit and is started, and gas-liquid booster pump is passed through
60 supplement the oil pressure of loss into static loading oil circuit, until pressure recovery to setting value, close gas-liquid booster pump 60 at this time.This
Require to protect the time carried in embodiment for a long time not less than 12 months.
Scheme in embodiment be not to limit the scope of patent protection of the present invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the claims of this case.
Claims (7)
1. a kind of large-scale three dimensional physical model is protected carry pilot system for a long time, it is characterised in that：Including pedestal, anti-deformation prestressing force
Loading frame component, load apply component, prepared by model sample and transport component and hydraulic loading system component；The anti-deformation
Prepared by prestressing force loading frame component and model sample is arranged at transport component on pedestal, and the load applies component setting
On anti-deformation prestressing force loading frame component, the load applies component and is connected with hydraulic loading system component, passes through load
Apply component with hydraulic loading system component to coordinate, the long-time under the progress multi-panel multi-point cooperative control of model sample is protected and is carried.
2. a kind of large-scale three dimensional physical model according to claim 1 is protected for a long time carries pilot system, it is characterised in that：Institute
It includes central frame, front end frame and rearward end frame to state anti-deformation prestressing force loading frame component, before the central frame is located at
Between end frame and rearward end frame；
The central frame uses more Pin formulas hollow structures, and the central frame of every Pin is by head piece, left column, right column
And cross member composition, and two Pin central frames of arbitrary neighborhood are all made of removable assembling structure and are connected；In the cross member lower surface
Central frame sliding block is installed, surface is equipped with frame guide rail on the base, makes central frame by central frame sliding block
There is linear movement degree of freedom on frame guide rail；The hollow inner cavity of the central frame is model sample LOADED CAVITY；
The front end frame includes left counter-force vertical beam, right counter-force vertical beam, counter-force crossbeam and counter-force beam support；The left counter-force is perpendicular
Beam and right counter-force vertical beam are symmetrically packed on counter-force crossbeam, and the counter-force beam support is connected in counter-force crossbeam lower surface, anti-
Power beam support lower surface is equipped with front end frame sliding block, so that front end frame is had on frame guide rail by front end frame sliding block
Move linearly degree of freedom；It is opened up in the middle part beam body of the counter-force crossbeam there are one through-hole, which opens as model sample
It punchinges, and model sample digs hole and model sample LOADED CAVITY face；The left counter-force vertical beam and right counter-force vertical beam bottom end with
Front end frame driving hydraulic cylinder is respectively connected between pedestal, and front end frame driving hydraulic cylinder is parallel with frame guide rail；
The rearward end frame includes left support vertical beam, right support vertical beam, support beam and support beam bearing；The left support is perpendicular
Beam and right support vertical beam are symmetrically packed in support beam, and the support beam bearing is connected in support beam lower surface, is propping up
Support beam support lower surface is equipped with rearward end frame sliding block, so that rearward end frame is had on frame guide rail by rearward end frame sliding block
Move linearly degree of freedom；In being respectively connected between the left support vertical beam and right support vertical beam bottom end and central frame cross member
Rearward end frame driving hydraulic cylinder, and middle rearward end frame driving hydraulic cylinder is parallel with frame guide rail；
Between the left counter-force vertical beam and left support vertical beam, between right counter-force vertical beam and right support vertical beam, counter-force crossbeam with
It is connected by prestressed draw-bar between support beam, is offered on the head piece, left column, right column and cross member
Pull rod through hole；By applying pretightning force to prestressed draw-bar, realize pre- between central frame, front end frame and rearward end frame
Stress is locked.
3. a kind of large-scale three dimensional physical model according to claim 2 is protected for a long time carries pilot system, it is characterised in that：Institute
It includes first level actuator group, the second horizontal actuator group, the horizontal actuator group of third and vertical work to state load to apply component
Dynamic device group；The left column medial surface in central frame, the second horizontal actuator group is arranged in the first level actuator group
Right column medial surface in central frame is set, and the horizontal actuator group of third is arranged on the inside of the support beam of rearward end frame
Face, the vertical actuator group are arranged in the head piece lower surface of central frame；The first level actuator group, the second level
Include several be uniformly arranged and the identical monomer of structure in the horizontal actuator group of actuator group, third and vertical actuator group
Actuator；The monomer actuator includes counter-force hydraulic cylinder, rectangle load plate and magnetostrictive displacement sensor；The counter-force liquid
Cylinder pressure is connected in by cylinder barrel on frame, and the rectangle load plate is perpendicularly fixedly arranged on the piston rod top of counter-force hydraulic cylinder, in square
Acoustic emission probe cloth apertured is offered in shape load plate；The magnetostrictive displacement sensor be connected to counter-force Barrel of Hydraulic Cylinders with
Between rectangle load plate.
4. a kind of large-scale three dimensional physical model according to claim 2 is protected for a long time carries pilot system, it is characterised in that：Institute
It includes that model sample prepares case, model sample plummer, model sample conveying rack, transport to state model sample and prepare and transport component
Frame driving hydraulic cylinder and plummer driving hydraulic cylinder；Surface is equipped with conveying rack guide rail on the base, conveying rack guide rail with
Frame guide rail is perpendicular, and the mounting height of conveying rack guide rail is more than frame guide rail, and is led with the conveying rack of frame guide rail intersection
Rail uses spliced removable assembling structure；Conveying rack sliding block is installed in the model sample conveying rack lower surface, passes through conveying rack
Sliding block makes model sample conveying rack have linear movement degree of freedom on conveying rack guide rail；The model sample plummer setting exists
On model sample conveying rack, plummer guide rail is installed in model sample conveying rack upper surface, in model sample plummer following table
Face is equipped with plummer idler wheel, so that model sample plummer is had linear movement on plummer guide rail certainly by plummer idler wheel
By spending；Cross member upper surface in the model sample LOADED CAVITY of the central frame is equipped with carrying platform switching guide rail, passes through
Plummer idler wheel makes model sample plummer have linear movement degree of freedom on plummer guide rail；The conveying rack drives hydraulic pressure
Cylinder is connected between pedestal and model sample conveying rack, and conveying rack driving hydraulic cylinder is parallel with conveying rack guide rail；The carrying
Platform driving hydraulic cylinder is connected between model sample conveying rack and model sample plummer, plummer driving hydraulic cylinder and plummer
Guide rail and carrying platform switching guide rail are parallel, pass through between the piston rod and model sample plummer of plummer driving hydraulic cylinder
Lockset is connected；The model sample prepares case and is located at model sample plummer upper surface.
5. a kind of large-scale three dimensional physical model according to claim 3 is protected for a long time carries pilot system, it is characterised in that：Institute
It includes computer, controller, static loading oil sources, static loading separator and static loading oil to state hydraulic loading system component
Road；The computer is connected with controller, and controller is connected with static loading oil sources, and static loading oil sources passes through static loading point
Oily device at least static loading oil circuit is connected all the way；
The static loading oil circuit includes the first electrohydraulic servo valve, the first electromagnet cut off valve and the second electromagnet cut off valve；Described
First oil inlet of one electrohydraulic servo valve is connected with static loading separator, in the first oil outlet of the first electrohydraulic servo valve and
A monomer actuator at least in parallel, the second oil outlet and the static loading oil sources phase of the first electrohydraulic servo valve between two oil inlets
Even；First electromagnet cut off valve is mounted on the pipeline between the first oil outlet and monomer actuator of the first electrohydraulic servo valve
On, second electromagnet cut off valve is mounted on the pipeline between the second oil inlet and monomer actuator of the first electrohydraulic servo valve
On；Static load voltage stabilizing oil circuit is connected on pipeline between first electromagnet cut off valve and monomer actuator side by side and static pressure is protected
Carry oil circuit；The static load voltage stabilizing oil circuit includes the first accumulator and third electromagnet cut off valve, and the first accumulator passes through third electromagnetism
Shut-off valve is connected with monomer actuator, and first pressure is equipped on the pipeline between third electromagnet cut off valve and monomer actuator
Sensor；It includes protecting carrier gas source, gas-liquid booster pump, the 4th electromagnet cut off valve and check valve that the static pressure, which is protected and carries oil circuit, protects carrier gas
Source is connected with gas-liquid booster pump, and gas-liquid booster pump is connected by the 4th electromagnet cut off valve with the liquid feeding end of check valve, check valve
Outlet end is connected with monomer actuator；It is equipped with second on pipeline between second electromagnet cut off valve and monomer actuator
Pressure sensor.
6. a kind of large-scale three dimensional physical model is protected carry test method for a long time, large-scale three dimensional object described in claim 1 is used
It manages model and protects load pilot system for a long time, it is characterised in that include the following steps：
Step 1：Analog material is chosen according to test requirements document, model examination is carried out using analog material in model sample prepares case
The preparation of sample, and pre-buried monitoring sensor in model sample；
Step 2：After model sample reaches initial strength, model sample is demoulded, while detection model sample is smooth
Degree, verticality and compactness, it is ensured that all qualifieds of model sample；
Step 3：First model sample conveying rack is moved to immediately ahead of model sample LOADED CAVITY, then by model sample plummer
It being moved in model sample LOADED CAVITY, model sample enters in model sample LOADED CAVITY with model sample plummer at this time, then
The locking between model sample plummer and model sample conveying rack is released, model sample conveying rack is finally moved back into initial bit
It sets；
Step 4：Anti-deformation prestressing force loading frame component is adjusted to closed state from open state, so that central frame, preceding
End frame and rearward end frame form an entirety；
Step 5：Control first level actuator group, the second horizontal actuator group, the horizontal actuator group of third and vertical work respectively
Dynamic device group action, the precise alignment until completing model sample clamp；
Step 6：Using multi-panel multi-point cooperative control mode control first level actuator group, the second horizontal actuator group, third
Horizontal actuator group and vertical actuator group carry out true triaxial static loading to model sample, then in the static loading water of setting
Model sample is implemented to dig under flat, while the deformation fracture evolution condition of observation model sample；
Step 7：After the completion of cutting, stress state is switched to load state of protecting for a long time, and the season cracking of observation model sample
Evolution condition；
Step 8：Control first level actuator group, the second horizontal actuator group, the horizontal actuator group of third and vertical work respectively
Dynamic device group action, completes the unloading of model sample；
Step 9：First model sample conveying rack is moved to immediately ahead of model sample LOADED CAVITY, then by model sample plummer
Locked with model sample conveying rack, then by model sample plummer out of model sample LOADED CAVITY with to model sample transport
On frame, model sample conveying rack is finally moved back into initial position, and research is further analyzed to the model sample of taking-up.
7. a kind of large-scale three dimensional physical model according to claim 6 is protected for a long time carries test method, it is characterised in that：It is long
Time protects the rate-determining steps carried：
Step 1：In a computer on setting model sample each loading surface static load charge values, and each monomer in each loading surface
The static load charge values all same or not all the same of actuator output；
Step 2：The first electromagnet cut off valve and the second electromagnet cut off valve in static loading oil circuit are opened, static load voltage stabilizing oil circuit is opened
In third electromagnet cut off valve, close static pressure protect carry oil circuit in the 4th electromagnet cut off valve；
Step 3：Start static loading oil sources, static loading is carried out to model sample according to the static load charge values of setting, when static state adds
When carrying the instantaneous pressure increase in oil circuit, pressure energy can be stored in the first accumulator in the form of compression energy, work as static loading
When instantaneous pressure in oil circuit reduces, the compression energy in the first accumulator can add in static loading oil circuit, ensure static add
The pressure for carrying oil circuit is steady；
Step 4：After static loading reaches setting value, the first electromagnet cut off valve and the second electromagnetism in static loading oil circuit are closed
Shut-off valve closes the third electromagnet cut off valve in static load voltage stabilizing oil circuit, opens static pressure and protects the 4th electromagnet cut off valve carried in oil circuit；
Step 5：Static loading oil sources is closed, pressurize pattern starts, with the increase of load time, when in static loading oil circuit
When pressure drops to setting value or less, static pressure protects the gas-liquid pressure-boosting pump startup carried in oil circuit, is added to static state by gas-liquid booster pump
The oil pressure that loss is supplemented in load oil circuit closes gas-liquid booster pump at this time until pressure recovery to setting value.
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| CN111678753A (en) * | 2020-07-03 | 2020-09-18 | 河海大学 | Underground cavern simulation experiment device and experiment method |
| CN115389322A (en) * | 2022-08-25 | 2022-11-25 | 东北大学 | Bidirectional synchronous loading method for true triaxial tester |
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