CN110220787A - A kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment - Google Patents
A kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment Download PDFInfo
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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
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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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
- 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
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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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
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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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
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
- G01N2203/0242—With circulation of a fluid
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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
Abstract
The invention discloses a kind of load path methods of measurement crack rock test specimen water rock coupling weakened treatment, are related to mechanical behaviour of soil and rock test field, steps are as follows for test method: (1), testing sample preparation；(2), experiment process step is divided into: a. simulates the forming process test of crack rock；B. erosion, unloader test under river are simulated；C. native state dynamic characteristic test containing crack rock；D. test specimen saturation testing；E. reduction test of the crack rock under different hydraulic pressure, different confining pressures；(3), test data analyzer: obtaining the scatter plot of the axial stress σ 1 and 3 relationship of confining pressure σ under each crack rock native state and every level-one hydraulic pressure, while obtaining intensive parameter c value and f value of the crack rock under native state and under hydraulic pressure at different levels.The invention proposes a kind of new easy load path methods, to study weakened treatment of the dam body basement rock under water rock coupling, provide technical support to solve dam body long-time stability problem.
Description
Technical field
The present invention relates to geographic information processing field, specially a kind of measurement crack rock test specimen water rock couples weakened treatment
Load path method.
Background technique
Water is one of essential characteristic of rock soil medium, other than influencing the physicochemical properties and constitutive relation of medium,
Migration generates dynamic, and hydrostatic pressure can change the stress state in medium；On the other hand, pressure stress state is relevant to medium
Geometrical characteristic, the change of stress state can cause the change of the permeability tensor of medium, to influence the flowing of water, it can be seen that,
There are close interaction relationships between stress and seepage flow: seepage effect pressure stress state, it influences medium again in turn
Seepage flow characteristics, as water rock coupled problem.In the geotechnical engineering accident occurred both at home and abroad, quite a few is since water is in rock
Seepage flow in soil-structure interactions lead to rock mass large area unstability and caused by.Therefore, the intensive parameter of crack rock is obtained, water rock is simulated
Influence of the coupling reduction to structure, it is particularly significant to research dam body long-time stability.
China is gradually built up in the big library of each high dam, the coupling of seepage field and stress field that rock mass is formed after reservoir filling
Under, certain weakened treatment can be generated, the stabilization of the dam foundation and dam abutment is produced a very large impact, the dam foundation is made in stress-seepage coupling
Weakened treatment under becomes the another new problem of hydraulic engineering circle.At present still to the water rock coupling weakened treatment research method of rock
Not yet explicitly, the test process of existing test method is complicated and time-consuming.
The triaxial test of existing water rock coupling weakened treatment, experimental design are to keep each rock test piece confining pressure constant
Under the conditions of, multiple rock test pieces are saturated, then applies hydraulic pressure at different levels respectively and carries out water rock coupled three-shaft whole compression process
Test, to obtain the quantitative description that hydraulic pressure influences dam Foundation Rock Mass mechanics parameter.
In conclusion a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment is needed, thus
The intensity for simulating water rock coupling reduction in crack rock, realizes the processing of geography information.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of coupling of measurement crack rock test specimen water rock is weak
The load path method for changing effect, the invention proposes a kind of new easy load path methods, exist to study dam body basement rock
Weakened treatment under water rock coupling provides technical support to solve dam body long-time stability problem.
The purpose of the present invention is achieved through the following technical solutions:
A kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment, steps are as follows for test method:
A kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment, which is characterized in that test side
Steps are as follows for method:
(1), sample preparation is tested, makes standard cylinder sample, it is highly straight that the diameter of the cylinder body, which is at least 50mm,
Twice of diameter；
(2), experiment process step is divided into:
A. the forming process test of crack rock is simulated；
B. erosion, unloader test under river are simulated；
C. native state rock sample dynamic characteristic test；
D. test specimen saturation testing；
E. reduction test of the crack rock under different hydraulic pressure, different confining pressures；
(3), it test data analyzer: obtains axial stress σ 1 under each crack rock native state and every level-one hydraulic pressure and encloses
The scatter plot of 3 relationship of σ is pressed, while obtaining intensive parameter c value and f value of the crack rock under native state and under hydraulic pressure at different levels.
By using above-mentioned test procedure, the present invention proposes that a kind of loading method of simplicity, measurement water rock coupling rock are weak
Change the load path method of effect, there is good test effect, there is wide applicability in the art；Simultaneously should
Test method be suitable for simulate dam foundation deep-seated fracture rock mass water rock coupling weakened treatment test, by design rock axis pressure,
The load path of confining pressure, hydraulic pressure obtains the intensive parameter under rock water rock coupling weakened treatment, carries out rock mass strength parameter with this
The research of rule is weakened, provides a kind of new method for the big library basement rock technical research steady in a long-term of high dam.Test obtained
As a result facilitate the mechanical behavior for more profoundly recognizing crack rock under dam foundation dam abutment complex stress condition.
Further, the test sample preparation respectively bores an aperture 5mm, hole depth 80 at the both ends of test specimen using boring method
The drilling of~90mm, the distance of the center line in two holes are 30mm.
By using above-mentioned test procedure, sampled by boring method, select suitable test specimen, guarantee test it is reliable
Property and according to property.
Further, the forming process of the simulation crack rock, experimental stage first apply confining pressure to 60MPa, rear application
Axis pressure.
By using above-mentioned test procedure, apply axis pressure and controlled by the way of Stress Control, and when close to destroying
It changes one's position to strain controlling, rate is slow as far as possible, slow pressure break rock sample, so that test specimen is generated the plane of fracture, provides seepage channel.This stage adds
It is loaded onto rock mass and enters the residual strength stage, is i.e. axial stress does not increase with strain and changed.
Further, confining pressure is slowly reduced to reduction test institute by erosion, unloader test under the simulation river by 60MPa
The confining pressure 3MPa needed.The determination of reduction test confining pressure is mainly according to the crustal stress around the maximum hydraulic pressure and crack rock of test
Level determines.
By using above-mentioned test procedure, by erosion, off-load under simulation river, confining pressure is slowly reduced to test institute by high
The small confining pressure needed, it can be deduced that influence of the lower erosion and Unloading Effect in river to Dam Foundation Rock.
Further, the native state rock sample dynamic characteristic test obtains the natural shape of rock sample by triaxial compression test
Intensive parameter under state.
By using above-mentioned test procedure, carries out native state rock sample dynamic characteristic test and obtained by triaxial compression test
The intensive parameter under rock sample native state is obtained, can be inferred that rock sample resists the maximum capacity of stress difference.
Further, the test specimen saturation testing, crack rock test specimen are saturated the reduction experimental stage under different confining pressures,
Keep the confining pressure in above procedure constant, axis pressure drop first applies 0.5MPa to the input end of rock test piece as low as suitable with confining pressure
Infiltration hydraulic pressure, while outlet end be vented, after the air in test specimen excludes completely, close outlet valve, stop be vented.So
Import and export end differential water pressures are monitored afterwards, and rock test piece saturation is completed when the differential water pressures are zero.
Rock test piece saturation process can be obtained by test by test specimen saturation testing by using above-mentioned test procedure
Different degrees of destruction situation, obtain reliable test basis to analyze.
Further, reduction test of the crack rock under different hydraulic pressure, different confining pressures, confining pressure is reduced to
3MPa, hydraulic pressure are set as first order hydraulic pressure 0.5MPa, then confining pressure are increased step by step by 3MPa, 5MPa, 9MPa, 12MPa, each
Water rock coupling compression test is carried out under grade confining pressure respectively, then hydraulic pressure is increased step by step as 1.0MPa, 1.5MPa, 2.0Mpa respectively,
Every level-one hydraulic pressure increases confining pressure by 3MPa, 5MPa, 9MPa, 12MPa respectively step by step, the reduction experiment under different confining pressures.
By using above-mentioned test procedure, tested by reduction of the crack rock under different hydraulic pressure, different confining pressures, it can be with
Know the influence situation of different hydraulic pressure and confining pressure to crack rock, infers different hydraulic pressure and confining pressure to the shadow of crack rock with this
Loud supplemental characteristic.
The beneficial effects of the present invention are:
1, the present invention proposes a kind of loading method of simplicity, the load path side of measurement water rock coupling rock weakened treatment
Method has good test effect, has wide applicability in the art；The test method is suitable for simulation simultaneously
Dam foundation deep-seated fracture rock mass water rock coupling weakened treatment test, by design rock axis pressure, confining pressure, hydraulic pressure load road
Diameter is obtained the intensive parameter under rock water rock coupling weakened treatment, the research of rock mass strength parameter reduction rule is carried out with this, is
The big library basement rock technical research steady in a long-term of high dam provides a kind of new method.Test result obtained facilitates more deep
Ground recognizes the mechanical behavior of rock mass under the complex stress of deep.
2, it is sampled by boring method, selects suitable test specimen, the reliability of guarantee test and according to property；Pass through simulation
Confining pressure is slowly reduced to the required small confining pressure of test by high, it can be deduced that it can be concluded that the lower erosion in river by erosion, off-load under river
And influence of the Unloading Effect to Dam Foundation Rock；Native state rock sample dynamic characteristic test is carried out, three axis under different confining pressures are passed through
Compression test obtains the intensive parameter under rock sample native state, can be inferred that rock sample resists the maximum capacity of stress difference；Pass through
Test specimen saturation testing can be obtained the different degrees of destruction situation of rock test piece saturation process by test, be obtained to analyze
Reliable test basis；By reduction test of the crack rock under different hydraulic pressure, different confining pressure, it is known that different hydraulic pressure and
Influence situation of the confining pressure to crack rock, the quantitative parameter number of the influence of different hydraulic pressure and confining pressure to crack rock is inferred with this
According to.
Detailed description of the invention
Fig. 1 is the sample system for the load path method that a kind of measurement crack rock test specimen water rock of the present invention couples weakened treatment
It is on the waiting list sample schematic diagram；
Fig. 2 is the rock mass examination for the load path method that a kind of measurement crack rock test specimen water rock of the present invention couples weakened treatment
Part is saturated unidirectional Water hydraulic static pressure loading situation section: schematic diagram；
Fig. 3 is the load path method rock test piece that a kind of measurement crack rock test specimen water rock of the present invention couples weakened treatment
It is saturated two-way water pressure load condition diagrammatic cross-section；
Fig. 4 is that a kind of axis pressure for the load path method that measurement crack rock test specimen water rock couples weakened treatment of the present invention is enclosed
Press Water hydraulic static pressure loading path curve schematic diagram；
Fig. 5 is that a kind of stress for the load path method that measurement crack rock test specimen water rock couples weakened treatment of the present invention is answered
Become the Complete Curve schematic diagram；
Fig. 6 is the load path method typical case σ 1- σ that a kind of measurement crack rock test specimen water rock of the present invention couples weakened treatment
3 relation curve schematic diagrames.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing, but protection scope of the present invention is not limited to
It is as described below.
As shown in Figures 1 to 6, a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment, examination
Steps are as follows for proved recipe method:
S1:(1), sample preparation is tested:
It is standardized according to laboratory, first takes rock sample to be prepared as 5 samples having a size of φ 50mm × H100mm at scene；Examination
Test consideration seepage effect, thus need to be formed in test specimen can the plane of fracture by seepage water or crack, therefore use boring method, trying
The drilling of an aperture 5mm, 80~90mm of hole depth are respectively bored in the both ends of part, and the distance of the center line in two holes is 30mm, and drilling is shown
It is intended to as shown in Figure 1.
S2:(2), experiment process:
A. the forming process test of crack rock is simulated；
First apply confining pressure to 60MPa, rear application axis pressure.Apply axis pressure to control by the way of Stress Control, and is connecing
It changes one's position when nearly destruction to strain controlling, rate is slow as far as possible, slow pressure break rock sample, so that test specimen is generated the plane of fracture, provides seepage channel.
This stage is loaded onto rock mass and enters the residual strength stage, i.e. axial stress does not increase with strain and changed.
B. erosion, unloader test under river are simulated；
Confining pressure is slowly reduced to required for reduction test by the process of erosion, off-load under this step simulations river as 60MPa
Confining pressure 3MPa.The determination of reduction test confining pressure is mainly horizontal really according to crustal stress locating for the maximum hydraulic pressure and crack rock tested
It is fixed.Usual situation, initial confining pressure should be greater than testing maximum hydraulic pressure, and maximum hydraulic pressure is 2MPa in this case column, therefore by follow-up test
Confining pressure be determined as 3MPa, 5MPa, 9MPa, 12Mpa.
C. native state rock sample dynamic characteristic test；
This step-by-step test purpose is to obtain the intensity under rock sample native state by the triaxial compression test under different confining pressures
When parameter, i.e. hydraulic pressure are 0, rock sample resists the maximum capacity (intensity) of stress difference.Hydraulic pressure is maintained 0MPa first；Then it presses
3MPa, 5MPa, 9MPa, 12MPa increase confining pressure step by step, carry out compression test respectively under every level-one confining pressure.Test first uses power
Switch to lateral strain control after control, until axial stress terminates when not increasing with strain and changing；Stress difference is dropped again later
As low as primitive axis pressure, confining pressure is adjusted to next stage, repeats above-mentioned test process, until the reduction of four confining pressure steps has been tested
At.It obtains under 0.0MPa hydraulic pressure, the corresponding rock mass strength of different confining pressures.
D. test specimen saturation testing；
It keeps confining pressure and axis in above procedure to press constant, first applies the infiltration water of 0.5MPa to the input end of rock test piece
Pressure, while outlet end is vented, (as shown in Figure 2), after the air in test specimen excludes completely, is closed outlet valve, is stopped row
Gas.Then import and export end differential water pressures are monitored, rock test piece saturation completes (as shown in Figure 3) when the differential water pressures are zero.
E. reduction test of the crack rock under different confining pressures is as follows:
1), reduction test 1 (hydraulic pressure is reduction test of the crack rock under different confining pressures under 0.5MPa)；
Confining pressure is reduced to 3MPa, hydraulic pressure is set as first order hydraulic pressure 0.5MPa, then by 3MPa, 5MPa, 9MPa,
12MPa increases confining pressure step by step, carries out water rock coupling compression test respectively under every level-one confining pressure.Test is first using after power control turns
For lateral strain control, terminate when axial stress does not change with strain increase；Stress difference is reduced to initially again later
Axis pressure, confining pressure are adjusted to next stage, repeat above-mentioned test process, are completed until the reduction of four confining pressure steps is tested.It obtains
Under 0.5MPa hydraulic pressure, the corresponding rock mass strength of different confining pressures；
2), reduction test 2 (hydraulic pressure is reduction test of the crack rock under different confining pressures under 1.0MPa)；
Confining pressure is reduced to 3MPa, hydraulic pressure is set as second level hydraulic pressure 1.0MPa, then by 3MPa, 5MPa, 9MPa,
12MPa increases confining pressure step by step, carries out water rock coupling compression test respectively under every level-one confining pressure.Test is first using after power control turns
For lateral strain control, terminate when axial stress does not change with strain increase；Stress difference is reduced to initially again later
Axis pressure, confining pressure are adjusted to next stage, repeat above-mentioned test process, are completed until the reduction of four confining pressure steps is tested.It obtains
1.0MPa under hydraulic pressure, the corresponding rock mass strength of different confining pressures；
3), reduction test 3 (hydraulic pressure is reduction test of the crack rock under different confining pressures under 1.5MPa)；
Confining pressure is reduced to 3MPa, hydraulic pressure is set as third level hydraulic pressure 1.5MPa, then by 3MPa, 5MPa, 9MPa,
12MPa increases confining pressure step by step, carries out water rock coupling compression test respectively under every level-one confining pressure.Test is first using after power control turns
For lateral strain control, terminate when axial stress does not change with strain increase；Stress difference is reduced to initially again later
Axis pressure, confining pressure are adjusted to next stage, repeat above-mentioned test process, are completed until the reduction of four confining pressure steps is tested.It obtains
Under 1.5MPa hydraulic pressure, the corresponding rock mass strength of different confining pressures；
4), reduction test 4 (hydraulic pressure is reduction test of the crack rock under different confining pressures under 2.0MPa)；
Confining pressure is reduced to 3MPa, hydraulic pressure is set as fourth stage hydraulic pressure 2.0MPa, then by 3MPa, 5MPa, 9MPa,
12MPa increases confining pressure step by step, carries out water rock coupling compression test respectively under every level-one confining pressure.Test is first using after power control turns
For lateral strain control, terminate when axial stress does not change with strain increase；Stress difference is reduced to initially again later
Axis pressure, confining pressure are adjusted to next stage, repeat above-mentioned test process, are completed until the reduction of four confining pressure steps is tested.It obtains
Under 2.0MPa hydraulic pressure, the corresponding rock mass strength of different confining pressures；
Test data is as shown in Figure 4 and Figure 5.
S3:(3), test data analyzer:
Dissipating for the axial stress σ 1 and 3 relationship of confining pressure σ under each crack rock native state and every level-one hydraulic pressure can be obtained
Point diagram (as shown in Figure 6), while intensive parameter c of the crack rock under native state and under hydraulic pressure at different levels can also be calculated
Value and f value.
S4: this test proposes a kind of new test loading method, and same rock only needs to be tested in a sample,
And then study water rock and couple weakened treatment, reduction test is coupled compared to raw water rock, by Data Comparison Analysis, can be obtained
Out:
A. test specimen stress condition more meets reality.Reservoir level has the characteristics of cyclically-varying, corresponding reservoir area basement rock
Periodically variable circulating pressure is born, the coupling reduction test of water rock is completed on a test specimen and more meets basement rock stress spy
Point；
B. test period is saved.According to previous experiences, the water rock coupling reduction property for studying a kind of rock is needed at least 3
Test is completed on group test specimen, every group of test specimen requires dress sample, unloads sample, prefabricated crack, take considerable time, and on a test specimen
Completion can at least save for 50% or more time；
C. test specimen is saved；
D. influence of the rock sample discrete type to Experiment Result is avoided.
The above is only a preferred embodiment of the present invention, it should be understood that the present invention is not limited to described herein
Form should not be regarded as an exclusion of other examples, and can be used for other combinations, modifications, and environments, and can be at this
In the text contemplated scope, modifications can be made through the above teachings or related fields of technology or knowledge.And those skilled in the art institute into
Capable modifications and changes do not depart from the spirit and scope of the present invention, then all should be in the protection scope of appended claims of the present invention
It is interior.
Claims (7)
1. a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment, which is characterized in that test method
Steps are as follows:
(1), sample preparation is tested, makes standard cylinder sample, it is highly diameter that the diameter of the cylinder body, which is at least 50mm,
Twice；
(2), experiment process step is divided into:
A. the forming process test of crack rock is simulated；
B. erosion, unloader test under river are simulated；
C. native state rock sample dynamic characteristic test；
D. test specimen saturation testing；
E. reduction test of the crack rock under different hydraulic pressure, different confining pressures；
(3), the axial stress σ 1 and confining pressure σ 3 under each crack rock native state and every level-one hydraulic pressure test data analyzer: are obtained
The scatter plot of relationship, while obtaining intensive parameter c value and f value of the crack rock under native state and under hydraulic pressure at different levels.
2. a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment according to claim 1,
It is characterized in that, the test sample preparation respectively bores an aperture 5mm, 80~90mm of hole depth at the both ends of test specimen using boring method
Drilling, the distance of the center line in two holes is 30mm.
3. a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment according to claim 1,
It is characterized in that, the forming process of the simulation crack rock, experimental stage first applies confining pressure to 60MPa, rear application axis pressure.
4. a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment according to claim 1,
It is characterized in that, erosion, unloader test under the simulation river, confining pressure is slowly reduced to required for reduction test as 60MPa
Confining pressure 3MPa.The determination of reduction test confining pressure is mainly horizontal really according to the crustal stress around the maximum hydraulic pressure and crack rock of test
It is fixed.
5. a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment according to claim 1,
It is characterized in that, the native state rock sample dynamic characteristic test is obtained under rock sample native state by triaxial compression test
Intensive parameter.
6. a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment according to claim 1,
It is characterized in that, the test specimen saturation testing, crack rock test specimen is saturated the reduction experimental stage under different confining pressures, in holding
The confining pressure stated in program is constant, and axis pressure drop is as low as, the first infiltration that the input end of rock test piece applies 0.5MPa suitable with confining pressure
Hydraulic pressure, while outlet end is vented, and after the air in test specimen excludes completely, is closed outlet valve, is stopped exhaust.Then it monitors
Import and export end differential water pressures, rock test piece saturation is completed when the differential water pressures are zero.
7. a kind of load path method of measurement crack rock test specimen water rock coupling weakened treatment according to claim 1,
It is characterized in that, reduction test of the crack rock under different hydraulic pressure, different confining pressures, is reduced to 3MPa, hydraulic pressure for confining pressure
It is set as first order hydraulic pressure 0.5MPa, then increases confining pressure step by step by 3MPa, 5MPa, 9MPa, 12MPa, under every level-one confining pressure
Water rock is carried out respectively and couples compression test, then hydraulic pressure is increased step by step as 1.0MPa, 1.5MPa, 2.0Mpa, every level-one water respectively
Pressure increases confining pressure by 3MPa, 5MPa, 9MPa, 12MPa respectively step by step, the reduction experiment under different confining pressures.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067448A (en) * | 2020-08-21 | 2020-12-11 | 佛山科学技术学院 | Method for measuring rock fracture opening |
| CN114791483A (en) * | 2022-04-01 | 2022-07-26 | 四川大学 | Rock mechanical behavior testing and analyzing method based on simulated deep in-situ sample |
| CN116046519A (en) * | 2022-11-25 | 2023-05-02 | 中南大学 | Rock triaxial pneumatic coupling single/double crack initiation and propagation test device and method |
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| CN114791483A (en) * | 2022-04-01 | 2022-07-26 | 四川大学 | Rock mechanical behavior testing and analyzing method based on simulated deep in-situ sample |
| CN116046519A (en) * | 2022-11-25 | 2023-05-02 | 中南大学 | Rock triaxial pneumatic coupling single/double crack initiation and propagation test device and method |
| CN116046519B (en) * | 2022-11-25 | 2023-08-11 | 中南大学 | Rock triaxial pneumatic coupling single/double crack initiation and propagation test device and method |
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Application publication date: 20190910 |