CN108020472A - Soft Rock Filling Materials deterioration test equipment and test method - Google Patents
Soft Rock Filling Materials deterioration test equipment and test method Download PDFInfo
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- CN108020472A CN108020472A CN201711287648.1A CN201711287648A CN108020472A CN 108020472 A CN108020472 A CN 108020472A CN 201711287648 A CN201711287648 A CN 201711287648A CN 108020472 A CN108020472 A CN 108020472A
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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
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing 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
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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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
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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Abstract
The invention discloses a kind of Soft Rock Filling Materials deterioration test equipment and test method, the testing equipment includes triaxial apparatus and sample, further includes hot wind gas handling system, exhaust system, counter-pressure system and the confined pressure system for becoming measurement with ectosome；The hot wind gas handling system is located at sample bottom, and the exhaust system is located at the top of sample, and the counter-pressure system is located at sample bottom, and the confined pressure system for becoming measurement with ectosome is located in triaxial pressure room, on the outside of sample.The present invention has carried out the deterioration simulation test under the conditions of different confined pressures, establishes the relation of weathering rate and confined pressure, it is determined that the optimal protective layer thickness of Soft Rock Filling Materials.Simulation test is deteriorated by three axis, carries out the triaxial shear test after Soft Rock Filling Materials fully deteriorate, the stress-strain relation under different confined pressures is obtained, destroys deviatoric stress, constitutive parameter, intensive parameter etc..Mechanical property after being deteriorated according to Soft Rock Filling Materials under the conditions of different compactnesss, determines the optimal compaction degree of Soft Rock Filling Materials.
Description
Technical field
The invention belongs to Geotechnical Engineering field, and in particular to a kind of Soft Rock Filling Materials deterioration test equipment and experiment side
Method.
Background technology
Soft Rock Filling Materials easily occur to crush since granule strength is low, and compared with hard rock, its mechanic nonlinearity characteristic is more aobvious
Write, the degradation phenomenas such as decay can occur for its modulus, intensity under the long-term drying and watering cycle effect of water.Existing specification is to rolling native stone
The requirement that rolls of the hard rock stockpile on dam is that porosity is 20%-28%, and for soft rock materials, porosity should be according to building
The requirements such as deformation, stress and shearing strength determine.For soft rock materials, it is contemplated that Soft Rock Filling Materials easily occur particle and break
Broken, if rolling requirement reaches less porosity, block building stones are easily broken in, small particle, modulus, intensity to material etc.
Mechanical property is unfavorable, but roll quality it is inadequate if, the mechanical property such as the effect of soft rock long term deterioration lower its modulus, intensity is also difficult
To meet engineering design requirements.
Processing method in engineering is to wrap up a floor fresh rock in the outside in Soft Rock Filling Materials area, can play and suppress soft
The effect of rock filler dusting, the reasonable selection of protective layer thickness is crucial.On the other hand, for Soft Rock Filling Materials, it is necessary to consider to use
Compactness carries out roller compaction construction quality control, carries out Experimental Study On Mechanical Properties after the deterioration of different compactnesss, most preferably rolls compactness
It is definite very crucial.For now, lack in specification and Practical Project science soft rock fill material deterioration test equipment with
Test method determines these important design and construction parameters.
The content of the invention
For the above-mentioned problems in the prior art, the present invention provides a kind of Soft Rock Filling Materials deterioration test equipment and examination
Proved recipe method, is influenced by the drying and watering cycle of metabisulfite solution to simulate dusting of the deterioration on Soft Rock Filling Materials, to medium-sized three axis
Instrument carries out scrap build, realizes the indoor simulation technology of the bad effect under triaxial state of stress.Different confined pressure bars are carried out
Deterioration simulation test under part, establishes the relation of weathering rate and confined pressure, according to the equivalent pass of confining pressure and coating ballast
System, it is determined that the optimal protective layer thickness of Soft Rock Filling Materials.Simulation test is deteriorated by three axis, after development Soft Rock Filling Materials fully deteriorate
Triaxial shear test, obtain stress-strain relation under different confined pressures, destroy deviatoric stress etc..Analytic intensity attenuation rate with
The attenuation rate rule of deformation modulus under 50% stress level, establish compactness and strength retrogression lead, the quantization of modulus attenuation rate
Relation, is led using strength retrogression or modulus attenuation rate threshold values is discrimination standard, determines the compaction Control index of Soft Rock Filling Materials, is proposed
Parameter selection rules after mechaanical property of materials deterioration.
For this reason, present invention employs following technical scheme：
A kind of Soft Rock Filling Materials deterioration test equipment, including triaxial apparatus and sample, the triaxial apparatus include vertical load loading,
Voltage stabilizing, control system, ambient pressure loading, voltage stabilizing, control system, triaxial cell, reaction frame, displacement, body, which become, measures system
System and load transducer；The testing equipment further includes hot wind gas handling system, exhaust system, counter-pressure system and becomes survey with ectosome
The confined pressure system of amount；The hot wind gas handling system is located at sample bottom, and the exhaust system is located at the top of sample, the back-pressure
System is located at sample bottom, and the confined pressure system for becoming measurement with ectosome is located in triaxial pressure room, on the outside of sample.
Further, the counter-pressure system includes metabisulfite solution and back-pressure saturation tank, metabisulfite solution are satisfied positioned at back-pressure
It is connected in tank, and by pipeline with triaxial cell, for applying metabisulfite solution back-pressure to sample bottom, realizes wet circulation
With the swollen circulation of salt.
Further, the confined pressure system for becoming measurement with ectosome is connected by pipeline with triaxial cell, for three
The indoor sample of axis pressure applies confined pressure with measuring the volume change of sample.
Further, the hot wind gas handling system and exhaust system are connected by pipeline with triaxial cell, respectively
For, into hot gas and to exhaust at the top of sample, realizing dry circulation to sample bottom.
A kind of Soft Rock Filling Materials deterioration test method, comprises the following steps：
(1) three axis samples are prepared by definite grading, design density or compactness, optimum moisture content, sample is without taking out
Vacuum saturation；
(2) sample is installed on triaxial apparatus, the default confined pressure progress of application is each to be consolidated to isotonic consolidation or bias；
(3) sodium sulphate saturated solution is prepared, and is injected in back-pressure saturation tank, after the completion of waiting sample consolidation, holding is effectively enclosed
Press constant, carry out the back-pressure saturation of metabisulfite solution, test ambient temperature is controlled in 20 DEG C~25 DEG C scopes with solution temperature；
(4) repeatedly circulated：1st circulation, with metabisulfite solution saturation 20 it is small when, ventilation 4 it is small when；2nd~5 circulation,
With metabisulfite solution saturation 4 it is small when, ventilation 4 it is small when；6th circulation, when clear water saturation 4 is small, when ventilation 4 is small；
After (5) 6 wet dry circulations, sample is pulled down, carries out a separating tests, the grading after being deteriorated.
Further, carry out the deterioration simulation test under the conditions of different confined pressures, establish the relation of weathering rate and confined pressure；According to
The equivalent relation of confining pressure and coating ballast, determines the optimal protective layer thickness of Soft Rock Filling Materials.
A kind of Soft Rock Filling Materials deterioration test method, comprises the following steps：
(1) three axis samples are prepared by definite grading, design density or compactness, optimum moisture content, sample is without taking out
Vacuum saturation；
(2) sample is installed on triaxial apparatus, the default confined pressure progress of application is each to be consolidated to isotonic consolidation or bias；
(3) sodium sulphate saturated solution is prepared, and is injected in back-pressure saturation tank, after the completion of waiting sample consolidation, carries out sodium sulphate
The back-pressure saturation of solution, test ambient temperature are controlled in 20 DEG C~25 DEG C scopes with solution temperature；
(4) repeatedly circulated：1st circulation, with metabisulfite solution saturation 20 it is small when, ventilation 4 it is small when；2nd~5 circulation,
With metabisulfite solution saturation 4 it is small when, ventilation 4 it is small when；6th circulation, when clear water saturation 4 is small, when ventilation 4 is small；
After (5) 6 wet dry circulations, back-pressure saturation is carried out to sample with clear water, three axis CD is carried out again after stabilization by consolidation and cuts
Cut experiment.
Further, Soft Rock Filling Materials are deteriorated with the contrast of front and rear constitutive relation, is deteriorated front and rear Soft Rock Filling Materials
Strain-stress relation；Carry out the deterioration simulation test under the conditions of different compactnesss, establish the Soft Rock Filling Materials deterioration of different compactnesss
Constitutive relation afterwards；According to the mechanical property after Soft Rock Filling Materials deterioration under the conditions of different compactnesss, the optimal of Soft Rock Filling Materials is determined
Compactness；Field roll compaction test is carried out according to the compactness, for instructing engineering construction.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) influenced by the drying and watering cycle of metabisulfite solution to simulate dusting of the weathering on Soft Rock Filling Materials, to medium-sized
Triaxial apparatus carries out scrap build, realizes the indoor simulation technology of the bad effect under triaxial state of stress.
(2) the deterioration simulation test under the conditions of different confined pressures has been carried out, the relation of weathering rate and confined pressure has been established, according to about
Beam pressure power and the equivalent relation of coating ballast, it is determined that the optimal protective layer thickness of Soft Rock Filling Materials.
(3) simulation test is deteriorated by three axis, has carried out the triaxial shear test after Soft Rock Filling Materials fully deteriorate, obtained
Stress-strain relation, destruction deviatoric stress, constitutive parameter, intensive parameter under different confined pressures etc..
(4) the compaction Control index of Soft Rock Filling Materials is determined according to result of the test, it is proposed that the mechaanical property of materials deteriorates
Parameter selection rules afterwards.For Soft Rock Filling Materials, consideration carries out roller compaction construction quality control with compactness, has carried out different compactings
Experimental Study On Mechanical Properties after the deterioration of degree, tentatively preferably go out to recommend compactness, with reference to the review of field roll compaction test, it is determined that optimal
Construction compaction index.
Brief description of the drawings
Fig. 1 is a kind of composition structure chart of Soft Rock Filling Materials deterioration test equipment provided by the present invention.
Fig. 2 is that front stage is deteriorated under different confined pressures with contrast.
Fig. 3 is the definition figure of weathering rate.
Fig. 4 is the relation curve of weathering rate and confined pressure.
Fig. 5 is stress-axial strain relation after the soft rock of different compactnesss deteriorates.
Fig. 6 is body change-axial strain relation after the soft rock of different compactnesss deteriorates.
Fig. 7 is that the normalization after soft rock deterioration destroys deviatoric stress and compactness relation.
Fig. 8 is the normalization deformation modulus and compactness relation after soft rock deterioration.
Description of reference numerals：1st, triaxial apparatus；2nd, hot wind gas handling system；3rd, exhaust system；4th, counter-pressure system；5th, band ectosome
Become the confined pressure system of measurement.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment come the present invention will be described in detail, specific embodiment therein and explanation only
For explaining the present invention, but it is not as a limitation of the invention.
As shown in Figure 1, the invention discloses a kind of Soft Rock Filling Materials deterioration test equipment, including triaxial apparatus 1 and sample, it is described
Triaxial apparatus 1 include vertical load loading, voltage stabilizing, control system, ambient pressure loading, voltage stabilizing, control system, triaxial cell,
Reaction frame, displacement, body become measurement system and load transducer；The testing equipment further includes hot wind gas handling system 2, exhaust
System 3, counter-pressure system 4 and the confined pressure system 5 for becoming measurement with ectosome；The hot wind gas handling system 2 is located at sample bottom, the pumping
Exhaust system 3 is located at the top of sample, and the counter-pressure system 4 is located at sample bottom, the confined pressure system 5 for becoming measurement with ectosome
In in triaxial pressure room, on the outside of sample；The sample is located in the triaxial pressure room of triaxial apparatus 1.Here the size of test sample
For Φ 101mm × H200mm.
The counter-pressure system 4 includes metabisulfite solution and back-pressure saturation tank, and metabisulfite solution is located in back-pressure saturation tank, and
It is connected by pipeline with triaxial cell, for applying metabisulfite solution back-pressure to sample bottom, realizes wet circulation and salt is swollen follows
Ring.
The confined pressure system 5 for becoming measurement with ectosome is connected by pipeline with triaxial cell, for triaxial cell
Interior sample applies confined pressure with measuring the volume change of sample.
The hot wind gas handling system 2 and exhaust system 3 are connected by pipeline with triaxial cell, are respectively used to examination
Dry circulation is realized into hot gas and to exhaust at the top of sample in sample bottom.
Embodiment 1
Protective layer thickness research realized by deterioration test with a separating tests, by the drying and watering cycle of metabisulfite solution come
Dusting of the simulation deterioration on Soft Rock Filling Materials influences, and carries out scrap build to medium-sized triaxial apparatus, realizes under triaxial state of stress
Bad effect indoor simulation technology.The weathering rate of Soft Rock Filling Materials is defined, carries out the deterioration simulation examination under the conditions of different confined pressures
Test, establish the relation of weathering rate and confined pressure, according to confining pressure and the equivalent relation of coating ballast, determine Soft Rock Filling Materials most
Excellent protective layer thickness.
Specific test method is as follows：
(1) three are prepared by definite grading, design density or compactness (here using 95% compactness), optimum moisture content
Axis sample, sample is without vacuumizing saturation；
(2) sample is installed on triaxial apparatus, it is each to isotonic consolidation, the sample consolidation of this experiment applies default confined pressure progress
Pressure is distributed as 50kPa, 100kPa, 150kPa；
(3) sodium sulphate saturated solution is prepared, and is injected in back-pressure saturation tank, after the completion of waiting sample consolidation, holding is effectively enclosed
Press constant, carry out the back-pressure saturation of metabisulfite solution, test ambient temperature is controlled in 20 DEG C~25 DEG C scopes with solution temperature；
(4) repeatedly circulated：1st circulation, with metabisulfite solution saturation 20 it is small when, ventilation 4 it is small when；2nd~5 circulation,
With metabisulfite solution saturation 4 it is small when, ventilation 4 it is small when；6th circulation, when clear water saturation 4 is small, when ventilation 4 is small；
After (5) 6 wet dry circulations, sample is pulled down, carries out a separating tests, the grading after being deteriorated.
The deterioration front stage pairing ratio of different confined pressures as shown in Fig. 2, as seen from Figure 2, Soft Rock Filling Materials after deterioration
Grading curve wants height compared with before deterioration, shows that deterioration causes Particle Breakage；Confined pressure is lower, particle damage degree caused by deterioration
It is more notable.
Soft Rock Filling Materials weathering rate W is defined as follows：
In formula (1)：Δ A, A are respectively hatched area in Fig. 3.
Carry out the deterioration simulation test under the conditions of different confined pressures, establish the relation of weathering rate and confined pressure, as shown in Figure 4.By
Fig. 4 is as it can be seen that with the increase of confined pressure, the weathering rate of soft rock is gradually reduced；(it is less than 50kPa) when confined pressure is smaller, weathering rate is with enclosing
Rapid drawdown occurs for the increase of pressure；After confined pressure is more than 50kPa, weathering rate is less than 13%；After confined pressure is more than 100kPa, weathering rate gradually one
Stationary value, is substantially equal to 10%.
When no confined pressure is not covered with layer protection, the weathering rate of soft rock is very big, and about 45%, this is to the strong of Soft Rock Filling Materials
Degree, the influence of deformation properties are very big, therefore should carry out the processing of coating protection to soft rock in engineering.
Confined pressure 50kPa is selected, its weathering rate is 12.4%, and confined pressure continues to increase, and suppresses the effect further deteriorated very
It is limited.Upstream face slope ratio below water level line is 1:2, according to confining pressure, (hard rock filler rolls rear unit weight with coating ballast
About 22.5g/cm3) equivalent relation, so that it is determined that the optimal protective layer thickness of Soft Rock Filling Materials for 50 ÷ 22.5 × cos26.6 °=
2m。
Embodiment 2
Simulation test is deteriorated by three axis, carries out the triaxial shear test after Soft Rock Filling Materials fully deteriorate, difference is obtained and encloses
The stress-strain relation of pressure, destroy deviatoric stress etc..Analytic intensity attenuation rate declines with the deformation modulus under 50% stress level
Lapse rate rule, establish compactness and strength retrogression lead, the quantitative relationship of modulus attenuation rate, led with strength retrogression or modulus attenuation rate
Threshold values is discrimination standard, determines the compaction Control index of Soft Rock Filling Materials.It is proposed that the parameter after mechaanical property of materials deterioration is chosen
Principle.
Specific test method is as follows：
(1) three axis samples are prepared by definite grading, design density or compactness, optimum moisture content, sample is without taking out
Vacuum saturation；
(2) sample is installed on triaxial apparatus, it is each to isotonic consolidation, the sample consolidation of this experiment applies default confined pressure progress
Pressure is distributed as 50kPa, 100kPa, 150kPa；
(3) sodium sulphate saturated solution is prepared, and is injected in back-pressure saturation tank, after the completion of waiting sample consolidation, carries out sodium sulphate
The back-pressure saturation of solution, test ambient temperature are controlled in 20 DEG C~25 DEG C scopes with solution temperature；
(4) repeatedly circulated：1st circulation, with metabisulfite solution saturation 20 it is small when, ventilation 4 it is small when；2nd~5 circulation,
With metabisulfite solution saturation 4 it is small when, ventilation 4 it is small when；6th circulation, when clear water saturation 4 is small, when ventilation 4 is small；
After (5) 6 wet dry circulations, back-pressure saturation is carried out to sample with clear water, three axis CD is carried out again after stabilization by consolidation and cuts
Cut experiment.
Different compactnesss Soft Rock Filling Materials deterioration after constitutive relation as shown in Figure 5 and Figure 6.As it can be seen that under different compactnesss
The strain-stress relation of Soft Rock Filling Materials is constrictive type, and generation is to cut contracting；Compactness is bigger, same to strain corresponding stress
It is bigger, and the corresponding body strain of same strain is smaller.
Normalization after soft rock deterioration destroys deviatoric stress and compactness relation is as shown in Figure 7.As it can be seen that compactness is bigger, break
Bad deviatoric stress (intensity) is bigger；Compactness is more than 96%, and normalized destruction deviatoric stress is more than 0.9.
Normalization deformation modulus and compactness relation after soft rock deterioration is as shown in Figure 8.As it can be seen that deteriorated for Soft Rock Filling Materials
Mechanical property afterwards, for intensity, raising of the increase compactness to deformation modulus is more efficiently；Compactness 96% it
Before, it is more notable to the amplification of deformation modulus to improve compactness；Compactness is more than 96%, improves amplification of the compactness to deformation modulus
Efficiency reduces.
It is pointed out that roll requirement of the existing specification to rolling the hard rock stockpile of earth and rockfill dam is that porosity is
20%-28%, for soft rock materials, porosity should be determined according to requirements such as dam deformation, stress and shearing strengths.For soft
For talus building stones, it is contemplated that Particle Breakage easily occurs for Soft Rock Filling Materials, if rolling requirement reaches less porosity, block stone
Material be easily broken in, the mechanical property such as small particle, modulus, intensity to material it is unfavorable, but roll quality it is inadequate if, it is soft
The mechanical properties such as the effect of rock long term deterioration lower its modulus, intensity are also difficult to meet engineering design requirements.Therefore, filled out for soft rock
Material, it is proposed that consideration carries out roller compaction construction quality control with compactness, carries out Experimental Study On Mechanical Properties after the deterioration of different compactnesss, just
Step preferably goes out to recommend compactness, with reference to the review of field roll compaction test, so that it is determined that optimal construction compaction index.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modification, equivalent substitution and improvement made within refreshing and spirit etc., should be included in protection scope of the present invention
Within.
Claims (8)
1. a kind of Soft Rock Filling Materials deterioration test equipment, including triaxial apparatus and sample, the triaxial apparatus includes vertical load and loads, is steady
Pressure, control system, ambient pressure loading, voltage stabilizing, control system, triaxial cell, reaction frame, displacement, body become measurement system
And load transducer, it is characterised in that：The testing equipment further include hot wind gas handling system, exhaust system, counter-pressure system and
Become the confined pressure system of measurement with ectosome；The hot wind gas handling system is located at sample bottom, and the exhaust system is located at sample top
Portion, the counter-pressure system are located at sample bottom, and the confined pressure system for becoming measurement with ectosome is located in triaxial pressure room, outside sample
Side.
A kind of 2. Soft Rock Filling Materials deterioration test equipment according to claim 1, it is characterised in that：The counter-pressure system includes
Metabisulfite solution and back-pressure saturation tank, metabisulfite solution are located in back-pressure saturation tank, and are connected by pipeline with triaxial cell,
For applying metabisulfite solution back-pressure to sample bottom, wet circulation and the swollen circulation of salt are realized.
A kind of 3. Soft Rock Filling Materials deterioration test equipment according to claim 1, it is characterised in that：The band ectosome becomes measurement
Confined pressure system be connected by pipeline with triaxial cell, in triaxial pressure room sample apply confined pressure with measurement sample
Volume change.
A kind of 4. Soft Rock Filling Materials deterioration test equipment according to claim 1, it is characterised in that：The hot wind gas handling system
It is connected, is respectively used to sample bottom into hot gas and to being taken out at the top of sample with triaxial cell by pipeline with exhaust system
Exhaust, realizes dry circulation.
5. such as a kind of Soft Rock Filling Materials deterioration test method of Claims 1-4 any one of them, it is characterised in that：Including following
Step：
(1) three axis samples are prepared by definite grading, design density or compactness, optimum moisture content, sample is without vacuumizing
Saturation；
(2) sample is installed on triaxial apparatus, the default confined pressure progress of application is each to be consolidated to isotonic consolidation or bias；
(3) sodium sulphate saturated solution is prepared, and is injected in back-pressure saturation tank, after the completion of waiting sample consolidation, keeps effective confining pressure not
Become, carry out the back-pressure saturation of metabisulfite solution, test ambient temperature is controlled in 20 DEG C~25 DEG C scopes with solution temperature；
(4) repeatedly circulated：1st circulation, with metabisulfite solution saturation 20 it is small when, ventilation 4 it is small when；2nd~5 circulation, uses sulphur
When acid sodium solution saturation 4 is small, when ventilation 4 is small；6th circulation, when clear water saturation 4 is small, when ventilation 4 is small；
After (5) 6 wet dry circulations, sample is pulled down, carries out a separating tests, the grading after being deteriorated.
A kind of 6. Soft Rock Filling Materials deterioration test method according to claim 5, it is characterised in that：Carry out different confined pressure conditions
Under deterioration simulation test, establish the relation of weathering rate and confined pressure；According to the equivalent relation of confining pressure and coating ballast, really
Determine the optimal protective layer thickness of Soft Rock Filling Materials.
7. such as a kind of Soft Rock Filling Materials deterioration test method of Claims 1-4 any one of them, it is characterised in that：Including following
Step：
(1) three axis samples are prepared by definite grading, design density or compactness, optimum moisture content, sample is without vacuumizing
Saturation；
(2) sample is installed on triaxial apparatus, the default confined pressure progress of application is each to be consolidated to isotonic consolidation or bias；
(3) sodium sulphate saturated solution is prepared, and is injected in back-pressure saturation tank, after the completion of waiting sample consolidation, carries out metabisulfite solution
Back-pressure saturation, test ambient temperature and solution temperature are controlled in 20 DEG C~25 DEG C scopes；
(4) repeatedly circulated：1st circulation, with metabisulfite solution saturation 20 it is small when, ventilation 4 it is small when；2nd~5 circulation, uses sulphur
When acid sodium solution saturation 4 is small, when ventilation 4 is small；6th circulation, when clear water saturation 4 is small, when ventilation 4 is small；
After (5) 6 wet dry circulations, back-pressure saturation is carried out to sample with clear water, carries out three axis CD shearing examinations again after stabilization by consolidation
Test.
A kind of 8. Soft Rock Filling Materials deterioration test method according to claim 7, it is characterised in that：Soft Rock Filling Materials are carried out bad
The contrast of constitutive relation before and after change, is deteriorated the strain-stress relation of front and rear Soft Rock Filling Materials；Under the conditions of carrying out different compactnesss
Deterioration simulation test, establish different compactnesss Soft Rock Filling Materials deterioration after constitutive relation；Under the conditions of different compactnesss
Mechanical property after Soft Rock Filling Materials deterioration, determines the optimal compaction degree of Soft Rock Filling Materials；On-site rolling examination is carried out according to the compactness
Test, for instructing engineering construction.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109342230A (en) * | 2018-08-27 | 2019-02-15 | 青岛理工大学 | Shear strength of rock test device and its method based on osmotic pressure simulation |
| CN109459367A (en) * | 2018-11-23 | 2019-03-12 | 成都理工大学 | A kind of permeating method for realizing multi- scenarios method and drying and watering cycle in situ |
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| CN87203176U (en) * | 1987-04-16 | 1988-01-06 | 陆钟武 | Device for measuring volume variation |
| CN203365248U (en) * | 2013-08-05 | 2013-12-25 | 三峡大学 | Triaxial apparatus with soft rock test piece shaping function |
| CN103954490A (en) * | 2014-05-15 | 2014-07-30 | 山东科技大学 | Indoor simulation fabrication method and device of soft rock grouting test piece for mine |
| CN204389307U (en) * | 2015-01-22 | 2015-06-10 | 中国石油大学(北京) | Soft rock true triaxial experimental provision |
| CN104833593A (en) * | 2015-01-23 | 2015-08-12 | 河海大学 | Surrounding rock creep rupture warning method applied in soft rock cavern warning system |
| CN104819897A (en) * | 2015-04-28 | 2015-08-05 | 中山大学 | Solution-injection circulating system under high-pressure environment |
| CN106432618A (en) * | 2016-09-15 | 2017-02-22 | 辽宁工程技术大学 | Expansive resin anchoring agent and preparation method thereof |
| CN106442143A (en) * | 2016-10-10 | 2017-02-22 | 青岛科技大学 | Soft-rock-like-simulated-roadway-project model test device |
| CN106908322A (en) * | 2017-02-23 | 2017-06-30 | 成都理工大学 | A kind of rock brittleness index number evaluation method based on Complete Stress-Strain Curve |
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| CN109342230A (en) * | 2018-08-27 | 2019-02-15 | 青岛理工大学 | Shear strength of rock test device and its method based on osmotic pressure simulation |
| CN109459367A (en) * | 2018-11-23 | 2019-03-12 | 成都理工大学 | A kind of permeating method for realizing multi- scenarios method and drying and watering cycle in situ |
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