CN106442152B - It is a kind of to stablize the experimental rig for applying osmotic pressure with crack propagation - Google Patents
It is a kind of to stablize the experimental rig for applying osmotic pressure with crack propagation Download PDFInfo
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- CN106442152B CN106442152B CN201610830820.2A CN201610830820A CN106442152B CN 106442152 B CN106442152 B CN 106442152B CN 201610830820 A CN201610830820 A CN 201610830820A CN 106442152 B CN106442152 B CN 106442152B
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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
- 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
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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
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
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Abstract
The invention discloses a kind of experimental rigs for stablizing application osmotic pressure with crack propagation, including：Air compressor and voltage stabilizing loading system；Voltage stabilizing loading system is to be internally provided with the closed hollow cylinder of horizontal centre partition board, the plectane of funnel-form through-hole is provided with centered on horizontal centre partition board, horizontal centre partition board will be separated into two chambers up and down inside voltage stabilizing loading system, upper chamber is air storage chamber, lower chamber is reservoir chamber, and funnel-form through hole is provided with break-make of the buoy valve for controlling funnel-form through-hole；Air compressor is connected to by an air inlet pipe with air storage chamber, and reservoir chamber passes through an outlet pipe connection test model；Provided by the invention to stablize the experimental rig for applying osmotic pressure with crack propagation, experimental rig principle is simple, simple for production, can ensure the safety of test process, realizes that infiltration hydraulic pressure still keeps stable purpose in crack propagation process.
Description
Technical field
The present invention relates to osmotic pressure load test equipment technical fields, stablize with crack propagation more particularly to one kind and apply
The experimental rig of osmotic pressure.
Background technology
Underground rock engineering is often under complicated geological environment, many and relevant engineering project disaster (such as mine of underground water
Karst declogging, Tunnel Gushing etc.) it is to promote rock mass implosion since the change of seepage field external environment is lured in underground developing behavior into
Gap splitting extension is mutually communicated, and then causes geological disaster.In mechanics scope, excavation behavior is defined as a kind of engineering and unloads
Lotus process, the joint fissure in rock mass will occur mutually to slide with the progress of unloading process, extension and interaction, and to rock
The mechanical characteristic of body generates significant impact, and rock mass is caused to gradually degrade and until finally surrender.With resource exploitation, water power work
The continuous increase of the underground engineerings depths of excavation such as journey diversion tunnel, nuke rubbish underground disposal, national defence, involved in deep rock mass engineering project
The high water pressures arrived are more and more, and the rock mass mechanics problem that high water head press belt comes has become urgently to be resolved hurrily in geotechnical engineering
Frontier nature project, and large quantities of outstanding researchers has been attracted to be engaged in the research work in this field.
The comprehensive achievement in research at present in relation to infiltration hydraulic pressure effect, theory analysis and numerical simulation are two kinds of main researchs
Methods and techniques means.During theory analysis, the mechanical function of infiltration hydraulic pressure is mainly considered, and ignores seepage field pair
The bating effect of joint plane；Numerical approach methods are then to be realized based on ripe business software platform, and business software is opened
Hair is also built upon on mechanical foundation, is substantially not different with theoretical research, and theoretical research is only realized and visualized by it
.
And the Test And Research Work for infiltration hydraulic pressure effect development and few, Zhou Zhihua (uniaxial cycling load and infiltration
Hydraulic pressure lower prestress fissure rock failure test research, 2014), Chen Hongjiang (manage by crack rock coupling of stress- damage-flow
By, experiment and engineering Application Research, 2010), Fu Jinwei (test specimen containing three-dimensional fracture biaxial pressure and hydraulic pressure effect fracturing
Experiment and numerical simulation study, 2015) achievement in research it is more representative, and closer to research object the problem of essence：
Zhou Zhihua devises a kind of infiltration Water hydraulic static pressure loading device (CN201120502167.X；CN201120519929.7), pass through oil pump
Apply a certain size oil pressure to prefabricated built-in be closed in crack of model test piece, then oil pressure is kept to stablize, to crannied body mould
Type carries out series of uniaxial compression test；Chen Hongjiang is in normal triaxial chamber, by water pump to the cylinder containing perforation crack
Model applies a certain size hydraulic pressure, and keeps confined pressure steady, implements a series of infiltration hydraulic pressure examination under three axis loading environments
Test test job；Fu Jinwei devises a set of hydrofracturing priming apparatus (CN201410034987.9), and containing prefabricated built-in
Series of uniaxial and Biaxial stress experiment are carried out in the rocks resin mould test specimen in crack.
In conclusion it is existing apply osmotic pressure experimental rig and method, have the shortcomings that one it is common：It is applied
Osmotic pressure can not keep stable with crack propagation.Although the prior art can load initial stage (prefabricated crack tip without
Micro-crack development, extension) keep permeating the stabilization of hydraulic pressure on crack surface, but with the appearance of crack propagation phenomenon, inside is split
Dilatancy will occur for gap, such as to keep permeating water pressure invariableness, need to supplying isometric highly pressurised liquid inside model test piece, by
Extremely unstable in crannied body destructive process, slow or anxious, above-mentioned experimental rig is difficult to realize the synchronous input of isometric liquid, more
It is difficult to maintain the stabilization of infiltration hydraulic pressure.However in Practical Project, during underground water is shifted with rock cranny extension,
Pressure is held essentially constant, it is also the power resources that prominent water burst occurs.
Invention content
It is above-mentioned existing to solve the object of the present invention is to provide a kind of experimental rig for stablizing application osmotic pressure with crack propagation
The problem of with the presence of technology.
To achieve the above object, the present invention provides following schemes：
It is a kind of to stablize the experimental rig for applying osmotic pressure, including air compressor and voltage stabilizing loading system with crack propagation；
The voltage stabilizing loading system is to be internally provided with the closed hollow cylinder of horizontal centre partition board, during the horizontal centre partition board is
The heart is provided with the plectane of funnel-form through-hole, and the horizontal centre partition board will be separated into two up and down inside the voltage stabilizing loading system
Chamber, wherein upper chamber are air storage chamber, and lower chamber is reservoir chamber, and the funnel-form through hole is provided with buoy valve and is used for
The break-make of the funnel-form through-hole is controlled, the spherical body portion that the buoy valve is set to the reservoir chamber side is hollow knot
Structure, the buoy valve other parts are solid construction, and voltage stabilizing loading system top is provided with one and the air storage chamber phase
Logical air gauge；The air compressor is connected to by an air inlet pipe with the air storage chamber, the air storage chamber and the air inlet pipe
Connectivity part is provided with air intake valve, and the reservoir chamber passes through an outlet pipe connection test model, the reservoir chamber and the water outlet
Pipe connectivity part is provided with flowing water Valve, and the experimental model is crannied body sample to be measured.
Optionally, the high-pressure air pressure that the air compressor provides is not less than 30MPa.
Optionally, the volume ratio of the air storage chamber and the reservoir chamber is not less than 1.
Optionally, the air gauge range is more than the air compressor and can be provided 2 times of surge pressure.
Optionally, the buoy valve material is high-elastic high-strength ageing-resistant rubber.
The present invention achieves following technique effect compared with the existing technology：
1, high pressure water is compensated with crack propagation and when flowing by high pressure gas dilatation, according to equation of gaseous state, when gas expands
When holding smaller, pressure is held essentially constant, and can realize that hydraulic pressure is permeated in crack propagation process still keeps stable purpose；
2, when crannied body is surrendered because occurring due to has a large amount of high-pressure water jets to flow out, buoy valve can automatically cut off high pressure
Gas enters the access of reservoir chamber, ensures the safety of test process；
3, experimental rig principle is simple, simple for production.
Description of the drawings
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is to stablize the experimental rig structural schematic diagram for applying osmotic pressure with crack propagation in the embodiment of the present invention；
Fig. 2 is the overlooking structure diagram of the horizontal centre partition board in the embodiment of the present invention；
Fig. 3 is to stablize the A-A for the experimental rig for applying osmotic pressure to section knot with crack propagation in the embodiment of the present invention
Structure schematic diagram；
In figure：1- air compressors, 2- air inlet pipe, 3- air intake valves, 4- air storage chambers, 5- air gauges, 6- buoys valve, 7-
Reservoir chamber, 8- horizontal centres partition board, 9- voltage stabilizings loading system, 10- flowing water Valves, 11- outlet pipes, 12- funnel-forms through-hole, 13-
Experimental model.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide a kind of experimental rigs for stablizing application osmotic pressure with crack propagation, to solve existing skill
Art there are the problem of.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Embodiment one
The present embodiment provides a kind of experimental rigs for stablizing application osmotic pressure with crack propagation, as shown in Figs. 1-3, including sky
Air compressor 1 and voltage stabilizing loading system 9；Voltage stabilizing loading system 9 is to be internally provided with the closed hollow cylinder of horizontal centre partition board 8
Body is provided with the plectane of funnel-form through-hole 12,12 surface Glabrous thorn of funnel-form through-hole, nothing centered on horizontal centre partition board 8
Sharp protrusion, horizontal centre partition board 8 will be separated into two chambers up and down inside voltage stabilizing loading system, wherein upper chamber is gas storage
Room 4, lower chamber is reservoir chamber 7, and the volume ratio of air storage chamber 4 and reservoir chamber 7 is not less than 1, is arranged at funnel-form through-hole 12
It is high-elastic high-strength ageing-resistant rubber, buoy to have break-make of the buoy valve 6 for controlling funnel-form through-hole 12,6 material of buoy valve
The spherical body portion that valve 6 is set to 7 side of reservoir chamber is hollow-core construction, and 6 other parts of buoy valve are solid construction, voltage stabilizing
9 top of loading system is provided with an air gauge 5 communicated with air storage chamber 4, and 5 range of air gauge, which is more than air compressor 1, to be carried
For 2 times of surge pressure；Air compressor 1 is connected to by an air inlet pipe 2 with air storage chamber 4, air storage chamber 4 and 2 connectivity part of air inlet pipe
It is provided with air intake valve 3, air compressor 1 is the equipment for being capable of providing pressure-air, the high pressure that air compressor 1 provides
Air pressure be not less than 30MPa, the high pressure gas that air inlet pipe 2 generates air compressor 1, by voltage stabilizing loading system 9 into
Air valve 3 inputs in air storage chamber 4；Reservoir chamber 7 is connected by 11 connection test model 13 of an outlet pipe, reservoir chamber 7 with outlet pipe 11
Logical place is provided with flowing water Valve 10, and high pressure water is input to experiment by outlet pipe 11 by the flowing water Valve 10 of voltage stabilizing loading system 9
Apply osmotic pressure in crannied body sample in model 13, air intake valve 3 can be kept with flowing water Valve 10 under high pressure conditions
Sealing characteristics are good.
As shown in Figure 1, on the basis of said structure design, the specific implementation step of experimental provision provided by the invention is such as
Under：
1, water filling：The water for injecting certain volume into the reservoir chamber 7 of voltage stabilizing loading system 9 by flowing water Valve 10, due to
The spherical body portion that buoy valve 6 is set to 7 side of reservoir chamber is hollow-core construction so that buoy after water is filled in reservoir chamber 7
Valve 6 floats, and the funnel-form through-hole 12 of horizontal centre partition board 8 is in the open state, is then shut off flowing water Valve 10；
2, it pressurizes：Air compressor 1 is connected to voltage stabilizing loading system 9 by air inlet pipe 2, air intake valve 3 is opened,
Air compressor 1 is opened, pressure-air is inputted to the air storage chamber 4 of voltage stabilizing loading system 9 by air inlet pipe 2, observation air gauge 5
Reading closes air compressor 1, simultaneously closes off air intake valve 3, air inlet pipe of then dismantling 2 when it reaches design requirement；
3, leak check：It keeps air intake valve 3 to be closed 10mins with flowing water Valve 10, observes air gauge 5
Reading whether have decline, if keep stablize, it was demonstrated that the leakproofness of voltage stabilizing loading system 9 is met the requirements, if slowly decline, no
Meet test requirements document, needs to overhaul voltage stabilizing loading system 9；
4, apply osmotic pressure：By outlet pipe 11, by the flowing water Valve of test model 13 water inlet and voltage stabilizing loading system 9
10 are connected, and slowly open flowing water Valve 10, whether observation 13 water inlet of test model there are flowing out, while observe air gauge 5
Whether reading decreased significantly, and be no, then the infiltration hydraulic pressure of test model 13 applies successfully；
5, test model load test：Opening pressure testing machine, carry out the single shaft of test model 13, twin shaft, three axis plus
Load or unloading test, until off-test；
6, air storage chamber pressure-air is discharged：Flowing water Valve 10 is closed, outlet pipe 11 of dismantling slowly opens air intake valve 3, will
Pressure-air slow release in air storage chamber 4, while the reading of air gauge 5 is observed, until reading zero；
7, reservoir chamber liquid is discharged：Flowing water Valve 10 is slowly opened, after 7 water body of reservoir chamber is completely exhausted out, closes water outlet
Valve 10 and air intake valve 3；
8, off-test：It puts air compressor 1 and voltage stabilizing loading system 9 in order, closes testing machine, clean laboratory, knot
Shu Benci is tested.
Invention applies specific case, principle and implementation of the present invention are described, and above example is said
The bright method and its core concept for being merely used to help understand the present invention；Meanwhile for those of ordinary skill in the art, foundation
The thought of the present invention, there will be changes in the specific implementation manner and application range.To sum up, the content of the present specification should not manage
Solution is limitation of the present invention.
Claims (5)
1. a kind of stablizing the experimental rig for applying osmotic pressure with crack propagation, it is characterised in that：Including air compressor and voltage stabilizing
Loading system；The voltage stabilizing loading system is to be internally provided with the closed hollow cylinder of horizontal centre partition board, in the level
Be provided with the plectane of funnel-form through-hole centered on the partition board of centre, the horizontal centre partition board by the voltage stabilizing loading system inside points every
At upper and lower two chambers, wherein upper chamber is air storage chamber, and lower chamber is reservoir chamber, and the funnel-form through hole is provided with floating
Mark valve is used to control the break-make of the funnel-form through-hole, and the buoy valve is set to the orbicule portion of the reservoir chamber side
It is divided into hollow-core construction, the buoy valve other parts are solid construction, and voltage stabilizing loading system top is provided with one and institute
State the air gauge that air storage chamber communicates；The air compressor is connected to by an air inlet pipe with the air storage chamber, the air storage chamber with
The air inlet pipe connectivity part is provided with air intake valve, and the reservoir chamber passes through an outlet pipe connection test model, the reservoir chamber
The outlet pipe connectivity part is provided with flowing water Valve, the test model is crannied body sample to be measured.
2. a kind of experimental rig for stablizing application osmotic pressure with crack propagation according to claim 1, it is characterised in that：Institute
The high-pressure air pressure for stating air compressor offer is not less than 30MPa.
3. a kind of experimental rig for stablizing application osmotic pressure with crack propagation according to claim 1, it is characterised in that：Institute
The volume ratio for stating air storage chamber and the reservoir chamber is not less than 1.
4. a kind of experimental rig for stablizing application osmotic pressure with crack propagation according to claim 1, it is characterised in that：Institute
State 2 times that air gauge range can be provided surge pressure more than the air compressor.
5. a kind of experimental rig for stablizing application osmotic pressure with crack propagation according to claim 1, it is characterised in that：Institute
It is high-elastic high-strength ageing-resistant rubber to state buoy valve material.
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| CN108398369A (en) * | 2018-03-21 | 2018-08-14 | 广东电网有限责任公司电力科学研究院 | A kind of GIS rubber packing materials selection method and system |
| CN113959852A (en) * | 2021-10-20 | 2022-01-21 | 中铁十四局集团第一工程发展有限公司 | Hydraulic fracturing expansion failure device and test method for jointed rock mass |
| CN114002072B (en) * | 2021-10-21 | 2023-10-20 | 南华大学 | Fracture rock hydraulic coupling test device and method for applying constant fracture water pressure |
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