CN205719785U - A kind of actual triaxial testing apparatus for simulating crack propagation - Google Patents
A kind of actual triaxial testing apparatus for simulating crack propagation Download PDFInfo
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- CN205719785U CN205719785U CN201620654060.XU CN201620654060U CN205719785U CN 205719785 U CN205719785 U CN 205719785U CN 201620654060 U CN201620654060 U CN 201620654060U CN 205719785 U CN205719785 U CN 205719785U
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- test specimen
- crack propagation
- upward pressure
- pressure head
- head
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Abstract
A kind of actual triaxial testing apparatus for simulating crack propagation, including pedestal, test specimen is placed above described pedestal, described test specimen front, rear, left and right four direction is respectively equipped with head, the one side that described head contacts with described test specimen is provided with sealant, and described upward pressure head is made up of upward pressure head hollow space and upward pressure head entity part；Liquid silica gel is pushed to described upward pressure head hollow space by the road by grouting pressure pump, and pipeline is provided with grouting pressure table and overflow valve.The beneficial effects of the utility model are: by analyzing the Silica hydrogel shape taken out after each test specimen pressurized, obtain crack propagation rule, and then adjust test specimen proportioning, and repeatedly test obtains stoichiometric(al)；Three-dimensional physical simulation crack propagation can represent cranny development degree more visually, provides reference for crack propagation research；Simple, convenient.
Description
Technical field
This utility model relates to a kind of simulation crack propagation device, especially a kind of for laboratory true triaxial test simulation
The device of crack propagation.
Background technology
For engineering rock mass, due to the impact of the Engineering Disturbances such as explosion, loading excavation off-load, inevitably exist
Producing new crack on the basis of protolith, these cracks newly-increased because of Engineering Disturbance will make rock mass be damaged, to rock mass
Mechanical characteristic adversely affects.Simulate crack propagation by true triaxial test, to cranny development qualitative analysis, rock is damaged
Wound is analyzed the biggest value.
For the ease of observing the extension mechanism in crack in conventional research, Many researchers uses plexiglas etc. transparent
Uniform analog material makes three-dimensional fracture sample.But, owing to rock interior is that heterogeneous body is anisotropic, three-dimensional fracture
Overlap joint, extension mechanism and pattern differ greatly with homogeneous material, some resinous material needs under cryogenic could table
The best brittle fracture feature.For liquid silica gel is relative solid high-temperature sulphurated siliastic, it is liquid glue, has stream
Dynamic property is good, and sulfuration is fast, safer environmental protection, and liquid silica gel has transparency, tearing toughness and the resilience of excellence, extensively
For injection molding process.
In order to observe the propagation law in the crack of true rock sample, many scholars use CT technology.Infrared Thermography Technology
Or acoustic emission carrys out the expansion of observation and analysis internal tiny crack, and has obtained a lot of important conclusion.But, these several classes
Technology used the most costly, general true triaxial test is difficult to possess this condition.
Summary of the invention
This utility model aims to overcome that the deficiency in prior art, it is provided that a kind of for simulating the true of crack propagation
Triaxial tester, provides foundation for research engineering Rock Damage crack propagation rule.
For reaching above-mentioned purpose, use technical scheme as follows:
A kind of actual triaxial testing apparatus for simulating crack propagation, including pedestal, places test specimen, test specimen above pedestal
Front, rear, left and right four direction is respectively equipped with head, and the one side that head contacts with test specimen is provided with sealant, and sealant prevents
Liquid overflows；Microcomputer controls upward pressure head and moves down and test specimen is produced pressure, and upward pressure head is by upward pressure head hollow space
Form with upward pressure head entity part；Liquid silica gel is pushed by grouting pressure pump upward pressure head hollow space by the road, pipeline
Being provided with grouting pressure table and overflow valve, grouting pressure table plays supervisory function bit, and overflow valve shields；It is steady that test specimen produces crack
Determining to start slip casting afterwards, under the effect of grouting pressure pump, liquid silica gel is injected crack by upward pressure head hollow space through hole,
When amount to be implanted does not changes with grouting pressure change, close grouting valve and stop pressurization.
The beneficial effects of the utility model are: by analyzing the Silica hydrogel shape taken out after each test specimen pressurized, split
Gap propagation law, and then change test specimen proportioning, repeatedly test obtains stoichiometric(al)；Three-dimensional physical simulation crack propagation is permissible
Represent cranny development degree more visually, provide reference for crack propagation research；Simple, convenient.
Accompanying drawing explanation
Accompanying drawing is this utility model structural representation.
Drawing reference numeral: the 1. left head of pedestal 2. 3. right head 4. sealant 5. upward pressure head 6. upward pressure head entity portion
Divide 7. upward pressure head hollow space 8. hole 9. crack 10. grouting pressure table 11. overflow valve 12. grouting valve 13. grouting pressure pumps
14. test specimens.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail.
A kind of actual triaxial testing apparatus for simulating crack propagation, including pedestal 1, places test specimen 14, examination above pedestal 1
Part 14 front, rear, left and right four direction is respectively equipped with head, and the one side that head contacts with test specimen 14 is provided with sealant 4, close
Sealing 4 prevents liquid from overflowing；Microcomputer controls upward pressure head 5 and moves down and test specimen 14 is produced pressure, and upward pressure head 5 is by upper pressure
Power head hollow space 7 and upward pressure head entity part 6 form；Liquid silica gel is by grouting pressure pump 13 by the road upward pressure head
Empty part 6 pushes, and pipeline is provided with grouting pressure table 10 and overflow valve 11,10 supervisory function bits of grouting pressure table, overflow valve 11
Shield；Test specimen 15 produces crack and stably starts slip casting afterwards, and under the effect of grouting pressure pump 13, liquid silica gel is by upper
Head hollow space 7 injects crack 9 through hole 8, when amount to be implanted does not changes with grouting pressure change, closes grouting valve 12
And stop pressurization.
A kind of actual triaxial testing apparatus for simulating crack propagation, comprises the following steps:
1) determine mix proportion scheme, prepare the key rock sample of diameter 50mm, highly 100mm and place it in same ring
Cultivate under border；
2) test specimen is placed on simulation crack propagation true triaxial test platform on, controlled loading axial compression and confined pressure, confined pressure by
Four, upper and lower, left and right head provides；
3) after treating that test specimen ruptures, axial compressive force stops loading, and opens grouting pressure pump, to the internal note of rock fracture
Enter liquid silica gel；
4), after Pressure gauge registration reaches predetermined value, stop slip casting, wait to be solidified；
5) after liquid silica gel solidifies completely, the Silica hydrogel that test block internal crack is formed, eye slit expansion feelings are taken out
Condition.
A kind of simulation crack propagation uniaxial test device, it is also possible to simulation prefabricated crack spread scenarios, comprises the following steps:
1) determining mix proportion scheme, what each scheme proportioning prepared 5 pieces of diameter 50mm, highly 100mm has prefabricated crack
Key rock sample；
2) test specimen is placed on simulation crack propagation uniaxial test platform, controlled loading axial compression and confined pressure；
3) when pressing certain length under upward pressure head, keep pressure constant, open grouting pressure pump, inside rock fracture
Slip casting, after Pressure gauge registration reaches predetermined value, stops slip casting, waits to be solidified；
4) after liquid silica gel solidifies completely, the Silica hydrogel that test block internal crack is formed, eye slit expansion feelings are taken out
Condition；
5) change test block, obtain, by same method, the Silica hydrogel that upward pressure head presses down obstructed length to be formed；
The Silica hydrogel that contrast is formed, obtains prefabricated crack expansion model, observes prefabricated crack Changing Pattern.
Claims (1)
1., for simulating an actual triaxial testing apparatus for crack propagation, including pedestal, above described pedestal, place test specimen, described
Test specimen front, rear, left and right four direction is respectively equipped with head, and the one side that described head contacts with described test specimen is provided with sealing
Layer, described upward pressure head is made up of upward pressure head hollow space and upward pressure head entity part；Liquid silica gel is by grouting pressure pump
Upward pressure head hollow space pushes by the road, and pipeline is provided with grouting pressure table and overflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620654060.XU CN205719785U (en) | 2016-06-28 | 2016-06-28 | A kind of actual triaxial testing apparatus for simulating crack propagation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620654060.XU CN205719785U (en) | 2016-06-28 | 2016-06-28 | A kind of actual triaxial testing apparatus for simulating crack propagation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205719785U true CN205719785U (en) | 2016-11-23 |
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| CN201620654060.XU Expired - Fee Related CN205719785U (en) | 2016-06-28 | 2016-06-28 | A kind of actual triaxial testing apparatus for simulating crack propagation |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084894A (en) * | 2017-03-30 | 2017-08-22 | 燕山大学 | A kind of deep-sea oil gas pipeline low temperature explosion bulge test device |
| CN107101897A (en) * | 2017-05-26 | 2017-08-29 | 东北石油大学 | The analogy method and device of a kind of planar distribution hydraulically created fracture extension |
| CN109187211A (en) * | 2018-09-20 | 2019-01-11 | 中国矿业大学 | A kind of three-dimensional non-steady slurries grouting test device and method |
| CN112326945A (en) * | 2020-11-05 | 2021-02-05 | 山东科技大学 | Shear excitation permeability-increasing grouting test device and method for tight fracture of surrounding rock of deep roadway |
| CN112630121A (en) * | 2020-11-30 | 2021-04-09 | 中国矿业大学 | Device and method for testing permeability of fractured surrounding rock of deep chamber under stress action |
| CN113552323A (en) * | 2021-08-03 | 2021-10-26 | 山西银锋科技有限公司 | High-pressure rock grouting test experiment system and test method thereof |
-
2016
- 2016-06-28 CN CN201620654060.XU patent/CN205719785U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107084894A (en) * | 2017-03-30 | 2017-08-22 | 燕山大学 | A kind of deep-sea oil gas pipeline low temperature explosion bulge test device |
| CN107084894B (en) * | 2017-03-30 | 2019-06-25 | 燕山大学 | A kind of deep-sea oil gas pipeline low temperature explosion bulge test device |
| CN107101897A (en) * | 2017-05-26 | 2017-08-29 | 东北石油大学 | The analogy method and device of a kind of planar distribution hydraulically created fracture extension |
| CN109187211A (en) * | 2018-09-20 | 2019-01-11 | 中国矿业大学 | A kind of three-dimensional non-steady slurries grouting test device and method |
| CN112326945A (en) * | 2020-11-05 | 2021-02-05 | 山东科技大学 | Shear excitation permeability-increasing grouting test device and method for tight fracture of surrounding rock of deep roadway |
| CN112630121A (en) * | 2020-11-30 | 2021-04-09 | 中国矿业大学 | Device and method for testing permeability of fractured surrounding rock of deep chamber under stress action |
| CN113552323A (en) * | 2021-08-03 | 2021-10-26 | 山西银锋科技有限公司 | High-pressure rock grouting test experiment system and test method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20170628 |