CN106353201A - Real-time three-dimensional CT (computed tomography) scanning type rock joint shear test system - Google Patents
Real-time three-dimensional CT (computed tomography) scanning type rock joint shear test system Download PDFInfo
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- CN106353201A CN106353201A CN201610734162.7A CN201610734162A CN106353201A CN 106353201 A CN106353201 A CN 106353201A CN 201610734162 A CN201610734162 A CN 201610734162A CN 106353201 A CN106353201 A CN 106353201A
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/60—Specific applications or type of materials
- G01N2223/616—Specific applications or type of materials earth materials
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A real-time three-dimensional CT (computed tomography) scanning type rock joint shear test system comprises a shear chamber, a mainframe framework, a loading device, a rotating device and a CT scanning device. The shear chamber is a hollow cylindrical shear chamber, and a rock joint sample is positioned in the shear chamber. An action end of the loading device is connected with a rotating gasket which is connected with a pressure block, the pressure block penetrates the outer wall of the shear chamber to abut against one side of a half portion of the rock joint sample, the other side of the half portion of the rock joint sample is positioned on a spring retaining plate which is fixed in the shear chamber, and the other half portion of the rock joint sample is fixed in the shear chamber. The rotating device comprises a rotating mechanical support frame and a driving component used for driving the rotating mechanical support frame to rotate, the rotating mechanical support frame is in linkage with the shear chamber, and the rotating mechanical support frame, the shear chamber and the rotating gasket are in coaxial arrangement. The CT scanning device comprises a radioactive source and a detector, and the radioactive source and the detector are arranged on two opposite sides of the shear chamber. The real-time three-dimensional CT scanning type rock joint shear test system has advantages that 360-degree scanning is effectively realized, and great real-time performance is achieved.
Description
Technical field
The invention belongs to Geotechnical Engineering field, it is related to a kind of rock shearing pilot system, specially a kind of ct real-time three-dimensional
Scanning rock joint shear pilot system.
Background technology
With the continuous propulsion of the multinomial great Geotechnical Engineering of country, the work being caused due to jointed rock mass unstability in engineering practice
Journey safety problem is increasingly subject to pay attention to.The shear property of rock joint is the important foundation evaluating rock stability, is always learning
All of great interest in art circle and engineer applied.Existing research focuses mostly on and carries out in the shear property to rock joint
The description of macroscopic view, focuses on and obtains the indexs such as shearing strength, and the research to micro-damage behavior in shear history is not deep enough.
The failure by shear of rock joint, is often as the crack initiation of microfissure in the concave-convex surface body of joint, development simultaneously finally
It is mutually communicated and form what macroscopic cracking caused.Therefore, the research extension of microfissure, Evolution, for understanding fully rock joint
Failure by shear mechanism is significant.And ct scanning technique, the structure change within test specimen can be carried out with comprehensive monitoring,
Understand localized variation, slight change and the variation tendency of test specimen internal structure, thus grasping destruction under stress condition for the test specimen
Rule.
Therefore, exploitation is applied to the rock joint shear pilot system of ct real time scan, both can be complete with study of rocks shearing
During the intensity of rock and deformation characteristic, rock mesostructure and its change procedure can be analyzed according to three-dimensional ct image again,
Disclose rock interior fracture breaks Evolution, the microexamination for mechanical behaviors of rocks and engineer applied Journal of Sex Research provide reliability
Scientific basis.
The research in past has been developed for a series of rock test systems being applied to ct scanning, such as uniaxial compression test dress
Put, triaxial compression test device etc., but not yet research and develop the rock joint shear pilot system that can achieve real-time three-dimensional ct scanning.
Content of the invention
In order to overcome the shortcomings of existing ct scanning rock test system cannot to realize 360 ° of scannings, real-times poor,
Present invention offer is a kind of effectively to realize 360 ° of good ct real-time three-dimensionals scanning rock joint shears test systems of scanning, real-time
System.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of ct real-time three-dimensional scans rock joint shear pilot system, including the shearing for loading rock joint test specimen
Room, for carrying the main machine frame of fluid shear chamber, for applying the charger of confined pressure and shearing force, being used for realizing 360 ° of rotations of test specimen
The rotary apparatuss turning and the ct scanning means for realizing ct scanning；
Described fluid shear chamber is the fluid shear chamber of hollow circular cylinder, and described rock joint test specimen is located at shearing interior, described loading
The motion end of device connects rotation pad, and described rotation pad is connected with briquetting, and described briquetting passes through shearing chamber outer wall and conflicts
In the side of a half part of described rock joint test specimen, the opposite side of a half part of described rock joint test specimen is located at spring
On baffle plate, it is indoor that described spring stop is fixed on described shearing；Another half part of described rock joint test specimen is fixed on shearing
Indoor；
Described rotary apparatuss include rotating machinery bracket and the drive component for mechanical carriage rotation is rotated, described
Rotating machinery bracket and described fluid shear chamber linkage, described rotating machinery bracket, fluid shear chamber, rotation pad are in be coaxially disposed；
Described ct scanning means includes radioactive source and the detector being arranged at fluid shear chamber opposite sides.
Further, described fluid shear chamber includes the circle that the upper side and lower side disc steel plate and carbon fibre composite make
Cylinder, described cylinder upper and lower end is embedded in upper and lower side discs shape steel plate respectively.
Further, the side of another half part of described rock joint test specimen is connected with the cushion block with swivel bolt, institute
State cushion block to be fixed on fluid shear chamber by rotating screw, the opposite side of another half part of described rock joint test specimen passes through bottom
It is indoor that cushion block is fixed on shearing.
Further, mounting ring morpheme displacement sensor on described rock joint test specimen, force transducer installed by described briquetting,
Between described rotation pad and fluid shear chamber top surface, mangneto displacement transducer is set.
Described fluid shear chamber is provided with oil pipe entrance and oil pipe outlet, is socketed rubber sleeve outside described rock joint test specimen.
Described main machine frame includes the column of base plate, top board and connecting bottom board and top board, installs and add in described top board
Carry and put, described column is formed by 4, every two ends are respectively bolted on base plate and top board.
Beneficial effects of the present invention are mainly manifested in:
1) rotary apparatuss are adopted, 360 ° of rotation test specimens, obtain the isostructure three-dimensional of test specimen internal crack in shear history
Stereo-picture；
2) adopt carbon fibre composite to make test specimen container side wall, while proof strength, do not affect ct scanning
Effect；
3) shearing force and confined pressure be by servo loading system control, can by computer programming realize multiple under the conditions of loading.
Brief description
Fig. 1 is the generalized section that this ct real-time three-dimensional scans rock joint shear pilot system.
Fig. 2 is the bottom top view that ct real-time three-dimensional scans rock joint shear pilot system.
Fig. 3 is spring stop top view.
In figure, 1- charger (vertical jack)；2- top board；3- rotates pad；4- mangneto displacement transducer；5- oil pipe
Entrance；6- carbon fiber board bolt；The cushion block with swivel bolt for the 7-；8- annular displacement transducer；9- bottom cushion block；10- whirler
Tool bracket；11- base plate；12- motor；13- roof bolt；14- sealing ring；15- briquetting；16- spring stop (16-1, bullet
Spring；16-2, steel disc)；Steel plate on the downside of 17- fluid shear chamber；Steel plate on the upside of 18- fluid shear chamber；19- oil pipe exports；20- carbon fiber composite
Material cylinder；21- column.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
With reference to Fig. 1～Fig. 3, a kind of ct real-time three-dimensional scans rock joint shear pilot system, including for loading rock
The fluid shear chamber of joint test specimen, main machine frame, charger 1, use for applying confined pressure and shearing force for carrying fluid shear chamber
In the rotary apparatuss realizing 360 ° of rotations of test specimen and for realizing the ct scanning means that ct scans；
Described fluid shear chamber is the fluid shear chamber of hollow circular cylinder, and described rock joint test specimen is located at shearing interior, described loading
The motion end of device connects rotation pad 3, and described rotation pad 3 is connected with briquetting 15, and described briquetting 15 passes through shearing chamber outer wall
And conflict described rock joint test specimen a half part side, the opposite side position of a half part of described rock joint test specimen
On spring stop 16, it is indoor that described spring stop 16 is fixed on described shearing；Another half part of described rock joint test specimen
It is fixed on shearing indoor；
Described rotary apparatuss include rotating machinery bracket 10 and the drive component for mechanical carriage rotation is rotated, institute
State rotating machinery bracket 10 and described fluid shear chamber linkage, described rotating machinery bracket 10, fluid shear chamber, rotation pad 3 are in coaxially to set
Put；
Described ct scanning means includes radioactive source and the detector being arranged at fluid shear chamber opposite sides.
Further, described fluid shear chamber includes the circle that the upper side and lower side disc steel plate and carbon fibre composite make
Cylinder, described cylinder upper and lower end is embedded in upper and lower side discs shape steel plate respectively.
Further, the side of another half part of described rock joint test specimen is connected with the cushion block 7 with swivel bolt, institute
State cushion block to be fixed on fluid shear chamber by rotating screw, the opposite side of another half part of described rock joint test specimen passes through bottom
It is indoor that cushion block 9 is fixed on shearing.
In the present embodiment, described fluid shear chamber is fine by upside steel plate 18, downside steel plate 17, spring stop 16, briquetting 15, carbon
Dimension composite cylinder 20, annular displacement transducer 8, cushion block 9, oil pipe entrance 5, oil pipe outlet 19, carbon fiber board bolt 6, band
The cushion block 7 of swivel bolt, rotation pad 3 form；Its annexation is: using carbon fiber board bolt 6 by carbon fibre composite
Cylinder 19 is fixed on upper and lower both sides steel plate 17,18, empty columnar fluid shear chamber in composition；Connect under vertical jack polishing head
One rotation pad 3, rotation pad 3 connects briquetting 15, and described briquetting 15 passes through upside steel plate 18, and the left side of test specimen is erected
To shearing, maximum shear displacement is the 1/5 of piece lengths；On the downside of the test specimen of left side, spring stop 16 is set, reaches fixing test specimen
Effect, in shear history, spring is gradually compressed, and the big I of compression stress is multiplied by decrement according to spring rate and calculates, by
The compression stress that the power that on pressure head, force transducer records deducts spring can obtain the true shearing force that is carried on test specimen；Test specimen
Right-hand part respectively has a cushion block up and down, and its middle and lower part cushion block 9 is fixing, and top cushion block 7, by being bolted on the steel plate 18 of upside, revolves
Turn bolt until cushion block encounters test specimen, tighten bolt, play the effect of fixing test specimen right-hand part；Rock sample is cylinder standard
Test specimen (diameter 5cm, high 10cm), with rubber sleeve sealing, middle containing a vertical joint, surrounding oil pressure applies confined pressure, oil
Tube inlet 5 is arranged at upside steel plate 18, and oil pipe outlet 19 is arranged at downside steel plate 17；Annular displacement transducer is set in the middle part of test specimen
8, hoop is on test specimen, and arranges one layer of lubricious material and test specimen between, the change in displacement of radial direction in detection test specimen shear history.
Described main machine frame includes the column 21 of base plate 11, top board 2 and connecting bottom board 11 and top board 2, and column is about 21
Two ends bolt 13 is fixed in base plate and top board, totally 4.Column, base plate, top board adopt q460 high-strength steel.
Described charger includes servo-controlled oil hydraulic system and servo-controlled vertical jack 1, respectively tries
Part provides confined pressure and shearing force, and maximum confined pressure can reach 20mpa, and maximum shear stress can reach 10mpa.
Described rotary apparatuss include rotating machinery bracket 10 and motor 12, and rotating machinery bracket is arranged at base plate 11
Center, fluid shear chamber is fixed on rotating machinery bracket 10, when carrying out ct scanning, mechanical carriage is rotated by motor 12
10 rotations, and then drive whole fluid shear chamber and the rotation pad 3 on top to rotate, obtain the scanogram of 360 ° of test specimen, according to need
The speed of adjustable rotating is wanted to obtain accurate image.
Described TT＆C system includes servo loading control system, mangneto displacement transducer, annular displacement transducer, power biography
Sensor, hydrostatic sensor and electric machine controller；Servo loading control system is used for carrying out SERVO CONTROL to confined pressure and shearing force；?
Mangneto displacement transducer 4, detection examination are set between steel plate 18 on the downside of the loading pressure head of above-mentioned jack 1 and on the upside of above-mentioned fluid shear chamber
The shear displacemant of part；Annular displacement transducer 8 is set in the middle part of test specimen, and hoop is on test specimen, and one layer of setting is smooth and test specimen between
Material, detects test specimen change in displacement radially in shear history；On the pressure head of jack, setting force transducer is used for measuring
Shearing force, the indoor hydrostatic sensor of shearing is used for measuring confined pressure；Electric machine controller is used for controlling the rotating speed of rotary apparatuss and turns
To.
Described ct scanning means includes radioactive source and the detector being arranged at fluid shear chamber opposite sides, and lonizing radiation pass through upper
State the space between main machine frame column, main machine frame is motionless and fluid shear chamber rotates, and ray is not blocked.
Claims (6)
1. a kind of ct real-time three-dimensional scanning rock joint shear pilot system it is characterised in that: described pilot system include for
Load fluid shear chamber, main machine frame, the loading for applying confined pressure and shearing force for carrying fluid shear chamber of rock joint test specimen
Device, for realizing the rotary apparatuss of 360 ° of test specimen rotation and the ct scanning means for realizing ct scanning；
Described fluid shear chamber is the fluid shear chamber of hollow circular cylinder, and described rock joint test specimen is located at shearing interior, described charger
Motion end connect rotation pad, described rotation pad is connected with briquetting, and described briquetting is through shearing chamber outer wall and conflict in institute
State the side of a half part of rock joint test specimen, the opposite side of a half part of described rock joint test specimen is located at spring stop
On, it is indoor that described spring stop is fixed on described shearing；It is indoor that another half part of described rock joint test specimen is fixed on shearing；
Described rotary apparatuss include rotating machinery bracket and the drive component for mechanical carriage rotation is rotated, described rotation
Mechanical carriage and described fluid shear chamber linkage, described rotating machinery bracket, fluid shear chamber, rotation pad are in be coaxially disposed；
Described ct scanning means includes radioactive source and the detector being arranged at fluid shear chamber opposite sides.
2. ct real-time three-dimensional as claimed in claim 1 scanning rock joint shear pilot system it is characterised in that: described shearing
Room includes the cylinder that the upper side and lower side disc steel plate and carbon fibre composite make, and described cylinder upper and lower end is inlayed respectively
It is embedded in upper and lower side discs shape steel plate.
3. ct real-time three-dimensional as claimed in claim 1 or 2 scanning rock joint shear pilot system it is characterised in that: described
The side of another half part of rock joint test specimen is connected with the cushion block with swivel bolt, and described cushion block is fixed by rotating screw
On fluid shear chamber, the opposite side of another half part of described rock joint test specimen is fixed on shearing interior by bottom cushion block.
4. ct real-time three-dimensional as claimed in claim 1 or 2 scanning rock joint shear pilot system it is characterised in that: described
Mounting ring morpheme displacement sensor on rock joint test specimen, described briquetting is installed force transducer, described rotation pad and fluid shear chamber
Mangneto displacement transducer is set between top surface.
5. ct real-time three-dimensional as claimed in claim 1 or 2 scanning rock joint shear pilot system it is characterised in that: described
Fluid shear chamber is provided with oil pipe entrance and oil pipe outlet, is socketed rubber sleeve outside described rock joint test specimen.
6. ct real-time three-dimensional as claimed in claim 1 or 2 scanning rock joint shear pilot system it is characterised in that: described
Main machine frame include the column of base plate, top board and connecting bottom board and top board, charger is installed in described top board, described vertical
Post is formed by 4, and every two ends are respectively bolted on base plate and top board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610734162.7A CN106353201A (en) | 2016-08-25 | 2016-08-25 | Real-time three-dimensional CT (computed tomography) scanning type rock joint shear test system |
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| CN201610734162.7A CN106353201A (en) | 2016-08-25 | 2016-08-25 | Real-time three-dimensional CT (computed tomography) scanning type rock joint shear test system |
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| CN201610734162.7A Pending CN106353201A (en) | 2016-08-25 | 2016-08-25 | Real-time three-dimensional CT (computed tomography) scanning type rock joint shear test system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036911A (en) * | 2017-05-17 | 2017-08-11 | 绍兴文理学院 | A kind of seepage flow of CT real-time three-dimensionals scanning, shearing coupling rock triaxial test system |
| CN107084876A (en) * | 2017-05-17 | 2017-08-22 | 绍兴文理学院 | A kind of high temperature of CT real-time three-dimensionals scanning, seepage flow, shearing coupling rock triaxial test system |
| CN107884288A (en) * | 2017-12-18 | 2018-04-06 | 成都理工大学 | Rock compressed shearing sample making containing Among Intermittent Joints and test method under high temperature |
| CN108169261A (en) * | 2018-01-05 | 2018-06-15 | 李中民 | A kind of core holding unit for CT scan |
| CN108760550A (en) * | 2018-05-17 | 2018-11-06 | 郝文峰 | The experimental provision that material internal deforms under a kind of measurement corrosive environment |
| WO2019024137A1 (en) * | 2017-07-31 | 2019-02-07 | 中国科学院地质与地球物理研究所 | Three-dimensional topography high-precision imaging method of cracks of rock hydraulic fracturing test |
| CN109406291A (en) * | 2018-11-08 | 2019-03-01 | 中国矿业大学 | A kind of saturating X-ray test device and method being crushed in situ for simulation rock |
| CN109490103A (en) * | 2018-12-18 | 2019-03-19 | 重庆交通大学 | Frost zone direct shear test system and its test method |
| CN109975106A (en) * | 2019-04-09 | 2019-07-05 | 大连理工大学 | A kind of radioprotector of pair of CT scan rock joint shear test |
| CN110907479A (en) * | 2018-09-14 | 2020-03-24 | 株式会社岛津技术研究 | Material testing machine and radiation CT apparatus |
| CN111413196A (en) * | 2020-04-20 | 2020-07-14 | 中山大学 | Experimental method and system for measuring fracture change in rock joint surface shearing process |
| CN113063665A (en) * | 2021-04-29 | 2021-07-02 | 四川大学 | Rock triaxial creep test device and system thereof |
| CN114034580A (en) * | 2019-01-25 | 2022-02-11 | 安阳师范学院 | Fiber-reinforced recycled brick aggregate concrete shear test device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107036911A (en) * | 2017-05-17 | 2017-08-11 | 绍兴文理学院 | A kind of seepage flow of CT real-time three-dimensionals scanning, shearing coupling rock triaxial test system |
| CN107084876A (en) * | 2017-05-17 | 2017-08-22 | 绍兴文理学院 | A kind of high temperature of CT real-time three-dimensionals scanning, seepage flow, shearing coupling rock triaxial test system |
| WO2019024137A1 (en) * | 2017-07-31 | 2019-02-07 | 中国科学院地质与地球物理研究所 | Three-dimensional topography high-precision imaging method of cracks of rock hydraulic fracturing test |
| CN107884288A (en) * | 2017-12-18 | 2018-04-06 | 成都理工大学 | Rock compressed shearing sample making containing Among Intermittent Joints and test method under high temperature |
| CN107884288B (en) * | 2017-12-18 | 2023-09-26 | 成都理工大学 | Manufacturing and testing method of rock compression shear sample containing intermittent joints at high temperature |
| CN108169261A (en) * | 2018-01-05 | 2018-06-15 | 李中民 | A kind of core holding unit for CT scan |
| CN108169261B (en) * | 2018-01-05 | 2021-02-19 | 四川省川建勘察设计院有限公司 | Rock core holder for CT scanning |
| CN108760550A (en) * | 2018-05-17 | 2018-11-06 | 郝文峰 | The experimental provision that material internal deforms under a kind of measurement corrosive environment |
| CN110907479A (en) * | 2018-09-14 | 2020-03-24 | 株式会社岛津技术研究 | Material testing machine and radiation CT apparatus |
| CN109406291A (en) * | 2018-11-08 | 2019-03-01 | 中国矿业大学 | A kind of saturating X-ray test device and method being crushed in situ for simulation rock |
| CN109490103A (en) * | 2018-12-18 | 2019-03-19 | 重庆交通大学 | Frost zone direct shear test system and its test method |
| CN114034580A (en) * | 2019-01-25 | 2022-02-11 | 安阳师范学院 | Fiber-reinforced recycled brick aggregate concrete shear test device and method |
| CN109975106A (en) * | 2019-04-09 | 2019-07-05 | 大连理工大学 | A kind of radioprotector of pair of CT scan rock joint shear test |
| CN111413196A (en) * | 2020-04-20 | 2020-07-14 | 中山大学 | Experimental method and system for measuring fracture change in rock joint surface shearing process |
| CN113063665A (en) * | 2021-04-29 | 2021-07-02 | 四川大学 | Rock triaxial creep test device and system thereof |
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