CN106370581A - True triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and test method of test device - Google Patents
True triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and test method of test device Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 118
- 238000010008 shearing Methods 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 title claims abstract description 39
- 238000010998 test method Methods 0.000 title claims abstract 3
- 238000006073 displacement reaction Methods 0.000 claims abstract description 118
- 239000012530 fluid Substances 0.000 claims abstract description 87
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 239000002775 capsule Substances 0.000 claims description 42
- 229920001971 elastomer Polymers 0.000 claims description 29
- 238000003825 pressing Methods 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000010720 hydraulic oil Substances 0.000 claims description 19
- 239000003921 oil Substances 0.000 claims description 18
- 238000010992 reflux Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 7
- 229920002943 EPDM rubber Polymers 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000000446 fuel Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000002131 composite material Substances 0.000 abstract 2
- 230000035699 permeability Effects 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 239000010935 stainless steel Substances 0.000 description 7
- 230000003204 osmotic effect Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 239000000346 nonvolatile oil Substances 0.000 description 1
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- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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Abstract
The invention discloses a true triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and a test method of the test device, and relates to a rack mechanics test technology. The device comprises a rigid frame, an oil cylinder, a pressure sensor, a high pressure cavity, a compression column, a shear plate, a normal pressure plate, a rock sample, a plastic sleeve, a computer, a fluid injection metering pump, a fluid return metering pump, a confining pressure tracking pump, an X-direction displacement sensor, a Y-direction displacement sensor and a Z-direction displacement sensor. The method comprises the steps of preparing a rock sample; assembling a composite member; placing the composite member; connecting pipelines; loading stress; checking airtightness; adjusting the stress and temperature; injecting fluid; carrying out a shearing test; unloading the stress; cleaning the device. After the device and the method are adopted, a true triaxial shear rock mass shearing seepage test can be realized under the complicated conditions of high temperature, high stress and high seepage pressure, and the sealing problem of high permeability fluid is solved during shearing; the highest seepage pressure reaches 50MPa, and the volume and pressure of seepage fluid can be accurately controlled and measured.
Description
Technical field
The present invention relates to rock mechanics experiment technology, more particularly, to a kind of rock mass true triaxial shearing being suitable to hyperosmosises is oozed
Stream assay device and its method.
Background technology
Rock mass shear is that one kind can directly measure the shear strength of rock mass (joint) and its deform isoparametric rock
Mechanics test device, is commonly used to the mechanics parameters of testing engineering rock mass, instructs design and the security evaluation of Geotechnical Engineering.Closely
Nian Lai, with the deep extension of underground engineering and mining engineering, subsoil water has had a strong impact on the stability of rock mass engineering project, has therefore opened
Exhibition rock mass shearing seepage flow Coupling Research is particularly important.Carry out numerous studies work both at home and abroad at present, developed multiple simultaneously
Rock mass coupled shear-flow test device, but these devices all have the less problem of osmotic fluid pressure it is impossible to break through high
A difficult problem for pressure fluid-tight, causes the shearing seepage tests under the conditions of high-pressure fluid cannot carry out.
In recent years, global carbon dioxide address is sealed research up for safekeeping and is obtained large development, just there is now a large amount of engineer applied projects
Carry out or be completed.But in project implementing process and find more problem, especially in project security evaluation in finished item
On lack rock mass mechanics characterisitic parameter and constitutive model under most basic supercritical carbon dioxide effect.Current shear
Rock mass shearing seepage tests under high-pressure fluid cannot be met；One kind can complete high temperature, heavily stressed, hyperosmosises complex condition
Rock mass to shear seepage flow test device broken to mechanical characteristic under high temperature, the effect of heavily stressed, hyperosmosises for the research rock mass, deformation
Bad mechanism and constitutive model play a very important role.
Nowadays, Hydraulic Servo Control Technology is both at home and abroad achieved with significant progress, the true triaxial developed on this basis
SERVO CONTROL forcing press is very ripe, can meet the realization of the currently Stress Control of various Experiments of Machanics and boundary condition.Respectively
Kind is high temperature resistant, high-strength rubber material has been widely used in various extreme environments so that carrying out being suitable to the rock mass of hyperosmosises
The research and development that true triaxial shears seepage flow test device become possible to.
Content of the invention
The purpose of the present invention be that provide a kind of rock mass true triaxial being suitable to hyperosmosises shearing seepage flow test device and
Its method, this device is capable of high temperature, heavily stressed, hyperosmosises complex condition rock mass true triaxial shearing seepage tests,
Highest osmotic pressure is up to 50mpa.Rock mass shear history high pressure fluid difficult sealing can be overcome using the seal rubber sleeve of particular design
Problem and rock mass in the pressure of the fluid and volume problem that can not accurately measure and control；The load capability of this device can
Meet the heavily stressed requirement of intact rock shearing, and enable the independent loads of three direction stress, simultaneously can be high-precision
The deformation in measurement three directions of rock sample, for further investigation rock or the seepage characteristic at joint, shear strength, deformation ＆ damage system and
The related contents such as constitutive model provide possibility.
The object of the present invention is achieved like this:
First, it is suitable to rock mass true triaxial shearing seepage flow test device (abbreviation device) of hyperosmosises
This device includes rigid frame, oil cylinder, pressure transducer, high-pressure chamber, compression leg, shear plate, normal direction pressing plate, rock sample, close
Sealing set, computer, fluid injection dosing pump, fluid reflux dosing pump, confined pressure follow the tracks of pump, x to displacement transducer, y to displacement
Sensor and z are to displacement transducer；
Its position and annexation are:
Be provided with high-pressure chamber in rigid frame, be provided with high-pressure chamber one by shear plate, normal direction pressing plate, rock sample and
Seal rubber sleeve constitutes the molectron of shearing seepage flow sealing, and the structure of described molectron is: rock sample is placed in the center of gum cover, in rock
Sample be respectively arranged with normal direction pressing plate up and down, be respectively arranged with shear plate in the left and right of rock sample；
Left side within rigid frame, right side and upside are respectively fixed with oil cylinder, and the piston of oil cylinder is connected with pressure transducer,
Molectron is compressed by compression leg, normal stress and shear stress are applied to molectron；
High-pressure chamber top is provided with hydraulic oil hand-hole and pipeline passway, internal cavities are pressure indoor；And it is indoor in confined pressure
It is provided with stiffness bearer, temperature sensor and heating coil；Computer connects respectively for temperature sensor and heating coil, Neng Goushi
The control of existing pressure indoor internal temperature；
It is embedded with deformed capsule and deformable closure in seal rubber sleeve；Confined pressure is followed the tracks of pump and is connected with deformed capsule and pressure indoor respectively,
The pressure of deformed capsule internal pressure and pressure indoor can be made always consistent；
Fluid injection dosing pump and fluid reflux dosing pump are connected with the fluid passage on the shear plate on left side and right side respectively, energy
The enough pressure to rock sample injection fluid and flow measure and control；
X is provided with x to displacement transducer and detects support and x to displacement fixed support to displacement；X passes through x to position to displacement transducer
Move detection support and x is fixed in molectron to displacement fixed support；Y is provided with y to displacement transducer and detects support and y to displacement
To displacement fixed support；Y detects support by y to displacement to displacement transducer and y is fixed on molectron to displacement fixed support
On；Z is provided with z to displacement fixed support to displacement transducer；Z is fixed on group by z to displacement fixed support to displacement transducer
Component；Can measure x, y and z of rock sample to deformation；
Fluid injection dosing pump, fluid reflux dosing pump, confined pressure follow the tracks of pump, x to displacement transducer, y to displacement transducer and z to
Computer connects displacement transducer respectively, realizes displacement and the collection of pressure information.
2nd, the rock mass true triaxial being suitable to hyperosmosises shears the method (abbreviation method) of seepage tests
This method comprises the following steps:
1st, rock sample preparation
Rock to be tested is processed into the cube of length × width × height=100mm × 100mm × 100mm, and each surface is polished flat
Whole smooth；If to be tested for rock joint, joint plane need to be in crosscutting cubical center；
2nd, molectron assembling
First deformed capsule and deformable closure are embedded in seal rubber sleeve, then load rock sample in seal rubber sleeve；On rock sample
Lower two sides refills normal direction pressing plate and shear plate after sticking antifriction piece, and compresses rock sample, ultimately forms molectron；By each to displacement
Fixed support and displacement detect support and corresponding displacement transducer are fixed in molectron；
3rd, molectron is placed
Molectron is placed on the center of the stiffness bearer of pressure indoor, and upper and lower for molectron axle center is heavy with upper compression leg axle center
Conjunction, left and right axle center and left and right compression leg axis coinciding, make compression leg compress molectron；
4th, pipeline connects
By fluid line indoor for confined pressure, capsule oil fuel tube and each sensor wire respectively to shear plate, deformed capsule and corresponding
Sensor be connected, and check working sensor state, finally close high-pressure chamber, tighten screw；
5th, stress loading
First normal stress is applied to 5mpa to rock sample, then simultaneously to pressure indoor and deformed capsule injection hydraulic oil to 5mpa；
6th, leak check
By fluid injection and reflux pipe to rock sample evacuation, reach certain vacuum degree, blind off a line, the sealing of inspection system
Property；Rock sample sealing to be determined is good, can carry out next step, otherwise find the problem, and solve；
7th, stress and temperature adjustment
According to predetermined normal stress and confined pressure, normal stress and confined pressure are applied to rock sample, during applying confined pressure, confined pressure with
Track pump can make the internal pressure of deformed capsule and confined pressure always consistent；Start dress of heating after normal stress and confined pressure steady
Put, the hydraulic oil making confined pressure indoor rises to predetermined temperature, and keeps 2h；
8th, fluid injection
Open fluid charge pump and fluid reflux pump and fluid is injected to rock sample, surveyed after the pressure or stability of flow of fluid
Examination；
9th, shearing test
Open relevant parameter monitoring system it is ensured that after each system is working properly, rock sample is pressed with the loading shearing of predetermined control pattern should
Power, until it reaches predetermined shear displacemant；Need to proceed data monitoring or other pilot projects according to test；
10th, stress unloading
After the completion of test, close heating system and monitoring system；When hydraulic fluid temperature is down to certain value, convection cell is let out first
Pressure, slowly unloads confined pressure, shear stress and normal stress again after fluid pressure release；
11st, cleaning plant
After stress unloads completely, discharge the indoor hydraulic oil of confined pressure, then open high-pressure chamber, take out molectron；Carefully tear open
Open molectron, and corresponding component is sorted out placement.
The present invention has following advantages and a good effect:
1st, the good sealing property to high-pressure fluid can be realized by the seal rubber sleeve of particular design；
2nd, seal rubber sleeve is embedded with deformed capsule, deformable closure, and deformed capsule is followed the tracks of pump with confined pressure and is connected, it is possible to achieve shear zone
The cubic deformation in domain, thus also can meet larger shear displacemant while ensureing good sealing；
3rd, confined pressure interior is provided with heating coil and can realize the various shearing seepage tests under different temperatures；
4th, pass through the high pressure liquid force feed in pressure indoor rock sample can be applied with lateral stress, normal direction pressing plate applying normal stress and cut
Cutting plate applies shearing force it is achieved that shearing the true triaxial stress condition of seepage tests；
5th, it is provided with fluid passage on shearing pressing plate, it is possible to achieve shear-seepage coupling test and different fluid
Shearing test under environment；
6th, rock mass surrounding does not have unnecessary dead space, is easy to inject the pressure of fluid to rock mass and volume carries out precise control and survey
Amount；
7th, be provided with molectron z to displacement transducer can detect rock sample z to deformation, and then further investigate rock mass
Detrusion mechanism etc..
In a word, the present invention is capable of high temperature, the shearing seepage flow examination of heavily stressed, hyperosmosises complex condition rock mass true triaxial
Test, and solve the sealing problem to Thief zone fluid (highest osmotic pressure is up to 50mpa) during shearing, and can be precisely controlled and count
The volume of amount seepage flow fluid and pressure.
Brief description
Fig. 1 is the structural representation (main view is cutd open) of this device；
Fig. 2 is the structure principle chart of the shearing seepage flow seal assembly of this device；
Fig. 3 is molectron x-y plane upper displacement sensor assembling schematic diagram；
Fig. 4 is molectron y-z plane upper displacement sensor assembling schematic diagram；
Fig. 5 is the axonometric chart of seal rubber sleeve.
In figure:
1 rigid frame；
2 oil cylinders；
3 pressure transducers；
4 high-pressure chambers,
4-1 pressure indoor, 4-2 hydraulic oil hand-hole, 4-3 pipeline passway,
4-4 stiffness bearer, 4-5 temperature sensor, 4-6 heating coil；
5 compression legs；
6 shear plates；
6-1 fluid passage；
7 normal direction pressing plates；
8 rock samples；
9 seal rubber sleeves
9-1 deformed capsule, 9-2 deformable closure；
10 computers；
11 fluid injection dosing pumps；
12 fluid reflux dosing pumps；
13 confined pressures follow the tracks of pump；
14 x are to displacement transducer；
14-1 x detects support to displacement, and 14-2 x is to displacement fixed support；
15 y are to displacement transducer；
15-1 y detects support to displacement；15-2 y is to displacement fixed support；
16 z are to displacement transducer；
16-1 z is to displacement fixed support.
Specific embodiment
Describe in detail with reference to the accompanying drawings and examples:
1st, overall
As Fig. 1,2,3,4, this device includes rigid frame 1, oil cylinder 2, pressure transducer 3, high-pressure chamber 4, compression leg 5, shear plate
6th, normal direction pressing plate 7, rock sample 8, seal rubber sleeve 9, computer 10, fluid injection dosing pump 11, fluid reflux dosing pump 12, confined pressure with
Track pump 13, x are to displacement transducer 14, y to displacement transducer 15, z to displacement transducer 16；
Its position and annexation are:
Bottom in rigid frame 1 is provided with high-pressure chamber 4, is provided with one by shear plate 6, normal direction in high-pressure chamber 4
Pressing plate 7, rock sample 8 and seal rubber sleeve 9 constitute the molectron of shearing seepage flow sealing, and the structure of described molectron is: rock sample 8 is placed in
The center of gum cover 9, is respectively arranged with normal direction pressing plate 7 up and down in rock sample 8, is respectively arranged with shear plate 6 in the left and right of rock sample 8；
Left side within rigid frame 1, right side and upside are respectively fixed with oil cylinder 2, the piston of oil cylinder 2 and pressure transducer 3
Connect, molectron is compressed by compression leg 5, normal stress and shear stress are applied to molectron；
High-pressure chamber 4 top is provided with hydraulic oil hand-hole 4-2 and pipeline passway 4-3, internal cavities are pressure indoor 4-1；And
It is provided with stiffness bearer 4-4, temperature sensor 4-5 and heating coil 4-6 in pressure indoor 4-1；Temperature sensor 4-5 and heating
Computer 10 connects coil pipe 4-6 respectively, is capable of the control of pressure indoor 4-1 internal temperature；
It is embedded with deformed capsule 9-1 and deformable closure 9-2 in seal rubber sleeve 9；Confined pressure follow the tracks of pump 13 respectively with deformed capsule 9-1 and
Pressure indoor 4-1 connects, and the pressure of deformed capsule 9-1 internal pressure and pressure indoor 4-1 can be made always consistent；
Fluid inject dosing pump 11 and fluid reflux dosing pump 12 respectively with the shear plate 6 on left side and right side on fluid passage 6-
1 connection, can inject the pressure of fluid and flow measures and controls to rock sample 8；
X is provided with x to displacement transducer 14 and detects support 14-1 and x to displacement fixed support 14-2 to displacement；X is to displacement transducer
14 detect support 14-1 and x by x to displacement is fixed in molectron to displacement fixed support 14-2；Y is to displacement transducer 15
It is provided with y and detect support 15-1 and y to displacement fixed support 15-2 to displacement；Y passes through y to displacement detection to displacement transducer 15
Frame 15-1 and y is fixed in molectron to displacement fixed support 15-2；Z is provided with z to displacement fixed support to displacement transducer 16
16-1；Z is fixed on molectron by z to displacement fixed support 16-1 to displacement transducer 16；Can measure rock sample 8 in x, y and
Z to deformation；
Fluid injection dosing pump 11, fluid reflux dosing pump 12, confined pressure follow the tracks of pump 13, x passes to displacement transducer 14, y to displacement
Computer 10 connects respectively to displacement transducer 16 for sensor 15 and z, realizes displacement and the collection of pressure information.
2nd, functional part
1) rigid frame 1
Rigid frame 1 is a kind of big square shape framework of special rigidity；
Its function is the supporter of other functional parts；Fixed oil cylinder 2 provides huge stress support for device；Its own rigidity
Up to rigidity 7gn/m, self-deformation very little during huge stress is applied to device, and rock sample destroy moment itself will not cause powerful
Elasticity can discharge and cause rock sample to burst apart destroying infection test data.
2) oil cylinder 2
Oil cylinder 2 is that one kind can be with servo-controlled hydraulic loaded equipment；
This device is using three sets of SERVO CONTROL oil cylinders with 1000kn load capability, it is possible to provide the shear stress of 200mpa,
The normal stress of 100mpa, realizes the heavily stressed function of test.
3) pressure transducer 3
Pressure transducer 3 is a kind of high-precision sensor that can detect oil cylinder 2 pressure change；Its maximum range is 150t,
Resolution is 0.00001；
Its function is the STRESS VARIATION of real-time monitoring device.
4) high-pressure chamber 4
High-pressure chamber 4 is a kind of airtight cylinder body of special high pressure resistant stainless steel band front cover, and front cover is screwed；And
Hydraulic oil hand-hole 4-2 and pipeline passway 4-3 is provided with cylinder body, internal cavities are pressure indoor 4-1；And in pressure indoor 4-1
It is provided with stiffness bearer 4-4, temperature sensor 4-5 and heating coil 4-6；
Its function is that the servo booster pump of peripheral hardware can be produced to pressure indoor 4-1 injection hydraulic oil by hydraulic oil hand-hole 4-2
The confined pressure of big 100mpa, applies z to stress, realizes rock sample true triaxial stress boundary condition, and be heating coil 4-6 to rock sample 8
Heating region；
* stiffness bearer 4-4 is a kind of rustless steel cube, facilitate molectron placement and rock sample 8 is applied reverse normal direction should
Power；
* temperature sensor 4-5 is a kind of high pressure resistant platinum resistance temperature sensor, can monitor the temperature change in pressure indoor 4-1；
* heating coil 4-6 is a kind of high voltage bearing electric resistor heating type device, can control its work shape by computer 10
State, and then realize temperature control.
5) compression leg 5
Compression leg 5 is the cylinder that a kind of stainless steel passes through high-pressure chamber 4；Compression leg 5 passes through close by sealing ring during high-pressure chamber 4
Envelope, that is, achieve sealing and frictional force also very little.
Its function is that the pressure producing oil cylinder is applied on rock sample 8.
6) shear plate 6
Shear plate 6 is a kind of rustless steel block with fluid passage 6-1；
Its function is transmission stress, and two pieces of parallel out-of-alignment shear plates 6 form shearing force to applying rock sample 8；Wherein fluid leads to
Road 6-1 is to make fluid can flow to rock sample 8, and does not have dead space between shear plate 6 and rock sample 8, can accurate calculation go out to penetrate into rock
The fluid volume of sample 8.
* fluid passage 6-1 is to be arranged on the l shape hole that fluid stream can be made on shear plate 6 to enter rock mass 8.
7) normal direction pressing plate 7
Normal direction pressing plate 7 is a kind of rustless steel cube；
Its function is the pressure that transmission normal direction oil cylinder produces, and applies normal stress to rock sample 8.
8) rock sample 8
Rock sample 8 is the standard specimen that rock mass to be tested is made, and is made generally in the square that the length of side is 100mm, and is polished in each face
Smooth.
9) seal rubber sleeve 9
As Fig. 5, seal rubber sleeve 9 is a kind of housing of the approximate cross shape being centrosymmetric being made up of ethylene propylene diene rubber
(seal rubber sleeve 1 is divided into two pieces of left and right along center vertical line, then You Kuaiyan center is turned clockwise 180 i.e. and left fast overlap),
Thickness of shell about 2mm, upper and lower, left and right opening；
It is internally provided with deformed capsule 9-1 and deformable closure 9-2 in seal rubber sleeve 9；
Its position and annexation are:
2 deformed capsule 9-1 are respectively placed in the internal left and right sides shear displacemant area of seal rubber sleeve 9, and 2 pieces of deformable closure 9-2 are respectively
It is close to 2 deformed capsule 9-1.
* deformed capsule 9-1
Deformed capsule 9-1 is a kind of square utricule being made up of ethylene propylene diene rubber with fluid-infusing port, can be with interior external pressure
There is the deformation of certain volume in power difference, be that rock sample 8 shear displacemant soars position, thus it is broken during shear displacemant to avoid rock sample 8 to occur
Bad seal rubber sleeve 9.
* deformable closure 9-2
Deformable closure 9-2 is the metallic plate that a kind of size made of aluminum is matched with deformed capsule 9-1, is clipped in deformed capsule 9-
Between 1 and rock sample 8, and can move, it is to avoid deformed capsule 9-1 is destroyed with rock sample 8 directly contact.
The function of seal rubber sleeve is that hydraulic oil does not penetrate into when in pressure indoor 4-1, hydraulic oil applies z to stress to rock sample 8
In rock sample 8；And high pressure seepage flow fluid can be sealed, realize the test requirements document of shear-seepage；
10) computer 10
Computer 10 adopts the industrial computer of stable performance；
Its function is the data such as collection displacement, stress, and injects dosing pump 11, fluid reflux dosing pump to heating apparatuss, fluid
12 and confined pressure follow the tracks of pump 13 be controlled data collection.
11) fluid injection dosing pump 11
Fluid injects the d series 100dx dosing pump that dosing pump 11 adopts teledyne isco company；
Its function is: the pressure of accurate control of fluid, and the parameter such as the transient state quality of accurate measurement fluid and flow, and has perseverance
Pressure and two kinds of mode of operations of constant current；Constant voltage mode of operation scalable pressure limit is 0.06895～68.95mpa.
12) fluid reflux dosing pump 12
Fluid reflux dosing pump 12 and fluid inject the d series 100dx that dosing pump 11 adopts same teledyne isco company
Dosing pump；
Its function is flow and the pressure that monitoring passes through rock sample 8 fluid, and can set constant voltage or constant current mode according to demand, realizes
To the accurate metering penetrating into rock sample 8 fluid.
13) confined pressure follows the tracks of pump 13
It is a kind of compression pump being consistent according to confined pressure pressure value adjust automatically output pressure and with confined pressure that confined pressure follows the tracks of pump 13；
Its function be to maintain deformed capsule 9-1 internal pressure consistent with confined pressure so that rock sample 8 shear displacemant change crimp glue
Capsule 9-1 becomes hour and does not result in the rising of deformed capsule 9-1 internal pressure and cause seal rubber sleeve 9 to deform.
14) x is to displacement transducer 14
As Fig. 3, x is a kind of conventional high-accuracy linear displacement differential transformer transducer to displacement transducer 14, and it is left and right
End connects with left and right shearing pressing plate 6 respectively.
Its function be monitoring rock sample 8 in shear history x to deformation.
Install for convenience, in x, the one end (right) of displacement transducer 14 is provided with displacement fixed support 14-2, in x
The other end (left) of displacement transducer 14 is provided with displacement and detects support 14-1；
* displacement fixed support 14-2 is a kind of stainless steel l shape support, to displacement transducer 14, x can be fixed on support 14-2
On, and support 14-2 is screwed on shearing pressing plate 6 (right)；
* displacement detects support 14-1 is a kind of stainless steel l shape support, is screwed on shearing pressing plate 6 (left), support
The one side of 14-1 is directly contacted to the armature of displacement transducer 14 with x.
15) y is to displacement transducer 15
Y adopts with x to the same kind of displacement transducer of displacement transducer 14 to displacement transducer 15；Its end be provided with y to
Displacement detects support 15-1 and y to displacement fixed support 15-2；
Its function be detection rock sample 8 in shear history y to deformation.
* displacement fixed support 15-2 is a kind of stainless steel l shape support, can by y to z to displacement transducer 15,16
It is fixed on support 15-2, and support 15-2 is screwed on normal direction pressing plate 7；
* displacement detects support 15-1 is a kind of stainless steel l shape support, is screwed on normal direction pressing plate 7, support 15-1
One side directly contact to the armature of displacement transducer 15 with y.
16) z is to displacement transducer 16；
As Fig. 4, z to displacement transducer 16 using with x to the same kind of displacement transducer of displacement transducer 14；Its end also sets
It is equipped with z to displacement fixed support 16-1, its other end directly withstands rock sample 8 center；
Its function be detection rock sample 8 in shear history z to deformation.
* z is a kind of stainless steel support to displacement fixed support 16-1, can by z to displacement transducer 16 be fixed on z to
On displacement fixed support 16-1, and z is screwed on normal direction pressing plate 7 to displacement fixed support 16-1；
3rd, the working mechanism of this device
This device is by 3 oil cylinders, 5, the 2 pieces of shearing pressing plates 6 of 2,3 compression legs and the 2 pieces of normal direction pressing plates 7 that are fixed on rigid frame 1
Rock sample 8 is applied with x to shear stress and y to normal stress, the maximum shear stress up to 200mpa, maximum normal stress up to
100mpa；By injecting hydraulic oil to pressure indoor 4-1, z is applied to (lateral) stress to rock sample 8, maximum lateral stress up to
100mpa；Thus realizing the shearing test under true triaxial stress condition.
Because confined pressure is higher than osmotic pressure (effective confining pressure deducts osmotic pressure equal to confined pressure) all the time, gum cover 9 be in all the time by
Pressure condition, injects dosing pump 11, fluid reflux dosing pump 12, fluid passage 6-1 and gum cover 9 by fluid and rock sample 8 can be injected
Super high pressure fluid (as supercritical co2, water etc.) realizes the shearing seepage tests under hyperosmosises environment, and highest osmotic pressure can arrive
50mpa；Seal rubber sleeve 9 primarily serves hydraulic oil in the sealing function to seepage flow fluid and isolation pressure indoor 4-1 and enters rock sample 8；
Fluid injects dosing pump 11 and is mainly used in the constant voltage mode to set or constant current mode injection fluid, and measures injection fluid volume
And the change of pressure etc.；Fluid reflux dosing pump 12 is mainly used in measuring volume and the pressure change of reflux fluid, and according to need
Constant voltage mode mensure etc. can be set.
The temperature of hydraulic oil in pressure indoor 4-1 can be controlled by heating coil 4-6, temperature sensor 4-5 and computer 10
Degree is so that rock sample 8 is synchronous with the temperature of hydraulic oil, and then realizes the shearing seepage tests under hot environment.
By the x, y, z that is fixed in molectron to displacement transducer 14,15,16 and the fixed support of its own and detection
Support is monitoring displacement deformation situation in shear history for the rock sample 8.
Follow the tracks of pump 13 by the deformed capsule 9-1 within gum cover 9, deformable closure 9-2 and confined pressure to realize in deformed capsule 9-1
Portion's pressure consistent with pressure indoor 4-1 hydraulic fluid pressure so that deformed capsule 9-1 with rock sample 8 destruction part movement and deformation and not
The deformation of gum cover 9 can be caused, so that gum cover 9 makes gum cover keep good sealing all the time；Deformable closure 9-2 can avoid
Capsule 9-1 is directly contacted with the rock sample destroying and destroys.
Claims (3)
1. a kind of rock mass true triaxial shearing seepage flow test device being suitable to hyperosmosises it is characterised in that:
It is provided with high-pressure chamber (4) in rigid frame (1), be provided with one in high-pressure chamber (4) by shear plate (6), method
Constitute the molectron of shearing seepage flow sealing to pressing plate (7), rock sample (8) and seal rubber sleeve (9), the structure of described molectron is:
Rock sample (8) is placed in the center of gum cover (9), is respectively arranged with normal direction pressing plate (7) up and down, in the left and right of rock sample (8) in rock sample (8)
It is respectively arranged with shear plate (6)；
Left side within rigid frame 1, right side and upside are respectively fixed with oil cylinder 2, the piston of oil cylinder 2 and pressure transducer 3
Connect, molectron is compressed by compression leg 5, normal stress and shear stress are applied to molectron；
High-pressure chamber (4) top is provided with hydraulic oil hand-hole (4-2) and pipeline passway (4-3), internal cavities are pressure indoor
(4-1)；And it is provided with stiffness bearer (4-4), temperature sensor (4-5) and heating coil (4-6) in pressure indoor (4-1)；Temperature
Computer (10) connects respectively for degree sensor (4-5) and heating coil (4-6), realizes the control of pressure indoor (4-1) internal temperature；
It is embedded with deformed capsule (9-1) and deformable closure (9-2) in seal rubber sleeve (9)；Confined pressure follow the tracks of pump (13) respectively with deformation
Capsule (9-1) and pressure indoor (4-1) connect, and can make the pressure of deformed capsule (9-1) internal pressure and pressure indoor (4-1) all the time
It is consistent；
Fluid inject dosing pump (11) and fluid reflux dosing pump (12) respectively with the shear plate (6) on left side and right side on fluid
Passage connects, and the pressure of the injection fluid of rock sample (8) and flow can be measured and control；
X is provided with x to displacement transducer (14) and detects support (14-1) and x to displacement fixed support (14-2) to displacement；X is to displacement
Sensor (14) passes through x and is fixed in molectron to displacement fixed support (14-2) to displacement detection support (14-1) and x；Y to
Displacement transducer (15) is provided with y and detects support (15-1) and y to displacement fixed support (15-2) to displacement；Y is to displacement transducer
(15) pass through y to be fixed in molectron to displacement detection support (15-1) and y to displacement fixed support (15-2)；Z passes to displacement
Sensor (16) is provided with z to displacement fixed support (16-1)；Z passes through z to displacement fixed support (16-1) to displacement transducer (16)
It is fixed on molectron；Can measure rock sample (8) x, y and z to deformation；
Fluid injection dosing pump (11), fluid reflux dosing pump (12), confined pressure follow the tracks of pump (13), x to displacement transducer (14), y
To displacement transducer (15) and z, to displacement transducer (16), computer (10) connects respectively, realizes adopting of displacement and pressure information
Collection.
2. a kind of rock mass true triaxial shearing seepage flow test device being suitable to hyperosmosises as described in claim 1, its feature exists
In:
Described seal rubber sleeve (9) is a kind of shell of the approximate cross shape being centrosymmetric being made up of ethylene propylene diene rubber
Body, thickness of shell about 2mm, opening up and down；
It is internally provided with deformed capsule (9-1) and deformable closure (9-2) in seal rubber sleeve 9；
Its position and annexation are:
2 deformed capsule (9-1) are respectively placed in the internal left and right sides shear displacemant area of seal rubber sleeve (9), 2 pieces of deformable closure (9-
2) it is close to 2 deformed capsule (9-1) respectively；
Deformed capsule (9-1) is a kind of square utricule being made up of ethylene propylene diene rubber with fluid-infusing port；
Deformable closure (9-2) is the metallic plate that a kind of size made of aluminum is matched with deformed capsule (1-1).
3. the test method of seepage flow test device is sheared based on the rock mass true triaxial being suitable to hyperosmosises described in claim 1-2,
It is characterized in that:
1st, rock sample preparation
Rock to be tested is processed into the cube of length × width × height=100mm × 100mm × 100mm, and by each surface polish light
Cunning is smooth；If to be tested for rock joint, joint plane need to be in crosscutting cubical center；
2nd, molectron assembling
First deformed capsule and deformable closure are embedded in seal rubber sleeve, then rock sample are loaded seal rubber sleeve；Rock sample is upper and lower
Two sides refills normal direction pressing plate and shear plate after sticking antifriction piece, and compresses rock sample, ultimately forms molectron；By each solid to displacement
Fixed rack and displacement detect support and corresponding displacement transducer are fixed in molectron；
3rd, molectron is placed
Molectron is put into high pressure chest center, and by upper and lower for molectron axle center and upper compression leg axis coinciding, left and right axle center with
Left and right compression leg axis coinciding, and make compression leg compress molectron；
4th, pipeline connects
By the fluid line in high-pressure chamber, capsule oil fuel tube and each sensor wire respectively with fluid injecting hole, deformed capsule
And sensor is connected accordingly, and check working sensor state, finally close high-pressure chamber, tighten screw；
5th, stress loading
First to applying normal stress to 5mpa, then simultaneously to high-pressure chamber and capsule injection hydraulic oil to 5mpa；
6th, leak check
By fluid injection and reflux pipe to rock sample evacuation, reach certain vacuum degree, blind off a line, inspection system seals
Property；Rock sample sealing to be determined is good, can carry out next step, otherwise find the problem, and solve；
7th, stress and temperature adjustment
According to predetermined normal stress and confined pressure, normal stress and confined pressure being applied to rock sample, applying process it is ensured that deforming in confined pressure
Capsule pressure is always consistent with confined pressure；Start heating apparatuss after normal stress and confined pressure steady, make high-pressure chamber
Interior hydraulic oil rises to predetermined temperature, and keeps 2h；
8th, fluid injection
Target fluid is injected to rock sample, is tested after Fluid pressure or stability of flow；
9th, shearing test
Open relevant parameter monitoring system it is ensured that after each system is working properly, rock sample is pressed with the loading shearing of predetermined control pattern should
Power, until it reaches predetermined shear displacemant；Need to proceed data monitoring according to test or carry out other pilot projects；
10th, stress unloading
After the completion of test, close heating system and monitoring system；When hydraulic fluid temperature is down to certain value, convection cell is let out first
Pressure, slowly unloads confined pressure, shear stress and normal stress again after fluid pressure release；
11st, cleaning plant
After stress unloads completely, open high-pressure chamber, clean out hydraulic oil and molectron；And carefully take molectron apart, and
Corresponding component is sorted out and places.
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|---|---|---|---|
| CN201610861042.3A CN106370581A (en) | 2016-09-29 | 2016-09-29 | True triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and test method of test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610861042.3A CN106370581A (en) | 2016-09-29 | 2016-09-29 | True triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and test method of test device |
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| CN106370581A true CN106370581A (en) | 2017-02-01 |
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| CN201610861042.3A Pending CN106370581A (en) | 2016-09-29 | 2016-09-29 | True triaxial shear rock mass shearing seepage test device suitable for high seepage pressure, and test method of test device |
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| CN108519293A (en) * | 2018-03-19 | 2018-09-11 | 太原理工大学 | A kind of true triaxial rock shearing seepage experimental apparatus |
| CN108519293B (en) * | 2018-03-19 | 2021-04-06 | 太原理工大学 | True triaxial rock shear seepage experimental apparatus |
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| CN109001051A (en) * | 2018-06-28 | 2018-12-14 | 中国科学院武汉岩土力学研究所 | Seepage experimental apparatus and its method are sheared suitable for the L-type of joint or crack rock |
| CN109738294A (en) * | 2019-01-29 | 2019-05-10 | 中国科学院武汉岩土力学研究所 | Suitable for the true triaxial stress seepage coupling test device of X-CT and its application |
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| CN110231269B (en) * | 2019-05-31 | 2024-03-01 | 中国地质大学（武汉） | Visual true triaxial loading and unloading seepage test equipment for clay rock |
| CN110231269A (en) * | 2019-05-31 | 2019-09-13 | 中国地质大学（武汉） | A kind of visualization true triaxial of claystone adds unloading seepage tests equipment |
| CN110132820A (en) * | 2019-06-19 | 2019-08-16 | 四川大学 | Carry out the device design and method of the test of crack rock anisotropic seepage using rock true triaxial load test system |
| CN111208009A (en) * | 2020-01-15 | 2020-05-29 | 太原理工大学 | Method for testing stress distribution form of contact surface of key block of masonry beam |
| CN111208009B (en) * | 2020-01-15 | 2022-04-22 | 太原理工大学 | Method for testing stress distribution form of contact surface of key block of masonry beam |
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| CN112284932A (en) * | 2020-09-30 | 2021-01-29 | 中国科学院武汉岩土力学研究所 | Multifunctional multi-direction rock shearing-seepage-temperature multi-field coupling test system |
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| CN112903470A (en) * | 2021-01-18 | 2021-06-04 | 东北大学 | High-temperature seepage coupling experimental device and method based on hard rock true triaxial system |
| CN112903477B (en) * | 2021-01-25 | 2022-08-26 | 华东交通大学 | Method for measuring and calculating shearing strength of particle material system |
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| CN113295552A (en) * | 2021-04-19 | 2021-08-24 | 东北大学 | High-temperature high-pressure true triaxial direct shear fracture seepage coupling test device and use method |
| CN113591420A (en) * | 2021-09-08 | 2021-11-02 | 中国石油大学(北京) | Simulation method and processor for true triaxial hydraulic fracturing experiment |
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Application publication date: 20170201 |