CN205484212U - Country rock damage time effect test structure - Google Patents
Country rock damage time effect test structure Download PDFInfo
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- CN205484212U CN205484212U CN201620295738.XU CN201620295738U CN205484212U CN 205484212 U CN205484212 U CN 205484212U CN 201620295738 U CN201620295738 U CN 201620295738U CN 205484212 U CN205484212 U CN 205484212U
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- backing plate
- country rock
- instrument connection
- cement bond
- hole
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Abstract
The utility model provides a country rock damage time effect test structure, this structural arrangement in underground cavern, including top backing plate, transmission column and bottom backing plate, the top backing plate is installed on the rock -wall of underground cavern's hole top, transmission column connects the top backing plate with the bottom backing plate, bottom backing plate below sets up hydraulic jack, hydraulic jack passes through the rigidity bearing plate and installs on the test country rock, the sound wave test hole has been arranged in the test country rock. The utility model discloses at the scene sound wave inspection hole of the system of arranging in advance, utilize pressurized equipment to the country rock pressure of exerting pressure for a long time, the damage of acquireing the country rock through sound wave test is along with the time change condition.
Description
Technical field
This utility model relates to underground engineering, particularly relates to rock convergence measure measuring technology.
Background technology
After Underground Engineering Excavation, stress generation redistribution, the damage of country rock not only shows that decay occurs in the mechanical property of country rock, and decays and have time effect, this effect is one of important mechanical characteristic of country rock, and caving in of a lot of underground engineerings all has substantial connection with time effect.The most buried in underground engineering, owing to its stress level is high, under the conditions of shallow embedding, much there is no the country rock of obvious time effect, it is also possible to show creep properties, cause the unstability of cavern or cave in.
Test for the time effect of coffer mechanics feature at present is concentrated mainly on laboratory test, utilizes single shaft or three axis flowing test instrument test rock test block mechanics parameter under the conditions of different pressures to change over process.Restriction due to test apparatus, it is thus achieved that test data be mainly stress and strain, the damage feature of rock itself is paid close attention to less.Simultaneously, the rock test block that laboratory test uses, wall rock condition actual with scene has the biggest difference, various joint fissure is there is inside on-the-spot country rock, these joint fissures directly influence the mechanical characteristic of country rock, destruction to country rock plays the control action of key, and these effects are that laboratory test cannot reflect.Above-mentioned factor causes the laboratory test cannot the trauma time effect of accurate evaluation country rock.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of rock convergence measure time effect test structure, it is possible to obtained the damage situation over time of country rock by sonic test.
This utility model solves technical problem and be the technical scheme is that a kind of rock convergence measure time effect test structure, described test structure is arranged in underground chamber, described test structure includes top backing plate, force-transmitting pole and backing plate at bottom, described top backing plate is arranged on the hole rimrock wall of underground chamber, described force-transmitting pole connects described top backing plate and described backing plate at bottom, arranging hydraulic jack below described backing plate at bottom, described hydraulic jack is arranged on test country rock by rigid bearing plate；It is disposed with cement bond logging prospect hole in described test country rock.
While using technique scheme, this utility model can also use or combine and use technical scheme further below:
Described cement bond logging prospect hole includes the first cement bond logging prospect hole being arranged in around loading area, the second sound wave instrument connection, the 3rd cement bond logging prospect hole, falling tone ripple instrument connection and is arranged in the fifth sound ripple instrument connection in the middle part of loading area.
Described first cement bond logging prospect hole, the second sound wave instrument connection, the 3rd cement bond logging prospect hole and falling tone ripple instrument connection are distributed on around described loading area, the edge 50cm of distance loading area.
The degree of depth of described first cement bond logging prospect hole, the second sound wave instrument connection, the 3rd cement bond logging prospect hole, falling tone ripple instrument connection and fifth sound ripple instrument connection is 10cm.
The beneficial effects of the utility model are: elastic wave reflects country rock inner structural features and degree of injury at the propagation characteristic of country rock, and main cause is that crack opening correspondingly can form low velocity of wave band by reduction velocity of wave；Value of wave speed is relatively low, illustrates that country rock sustains damage, and crack is opened.The sonic detection hole of this utility model arrangement system the most in advance, utilizes pressurized equipment pressure long-time to country rock pressure, is obtained the damage situation over time of country rock by sonic test.
Compared with prior art, this utility model has the advantage that 1, this patent test object is on-the-spot country rock, more can reflect the true condition of country rock than laboratory test；2, this patent have employed single hole and tests two kinds of methods across hole, it is possible to realize the comprehensive test to test zone rock convergence measure feature；3, the loading equipemtn in this patent is easy to use, and measuring accuracy is high, and voltage stabling control is long, is highly suitable for time effect test；4, the method for testing in this patent considers time and two factors of load, by once testing the mutual relation that just can obtain damage with the two factor, in hgher efficiency.
Accompanying drawing explanation
Fig. 1 is overall structure figure of the present utility model.
Fig. 2 is the layout drawing of cement bond logging prospect hole of the present utility model.
Detailed description of the invention
Referring to the drawings.
A kind of rock convergence measure time effect test structure of the present utility model is arranged in underground chamber, described test structure includes top backing plate 1, force-transmitting pole 2 and backing plate at bottom 3, described top backing plate 1 is arranged on the hole rimrock wall 4 of underground chamber, described force-transmitting pole 2 connects described top backing plate 1 and described backing plate at bottom 3, arranging hydraulic jack 5 below described backing plate at bottom 3, described hydraulic jack 5 is arranged on test country rock 7 by rigid bearing plate 6；Sound wave instrument connection is had according to certain regular arrangement in described test country rock 7.
Described cement bond logging prospect hole includes first cement bond logging prospect hole the 8, second sound wave instrument connection the 9, the 3rd cement bond logging prospect hole 10 being arranged in around loading area 13, falling tone ripple instrument connection 11 and is arranged in the fifth sound ripple instrument connection 12 in the middle part of loading area 13.
Described first cement bond logging prospect hole the 8, second sound wave instrument connection the 9, the 3rd cement bond logging prospect hole 10 and falling tone ripple instrument connection 11 are distributed on described loading area 13 around, the edge 50cm of distance loading area 13；The degree of depth of described first cement bond logging prospect hole the 8, second sound wave instrument connection the 9, the 3rd cement bond logging prospect hole 10, falling tone ripple instrument connection 11 and fifth sound ripple instrument connection 12 is about 10cm.
Specific embodiments of the present utility model is:
First, underground chamber selects the preferable region of wall rock condition, according to arranging cement bond logging prospect hole as shown in Figure 2.Wherein first to fourth cement bond logging prospect hole carries out single-hole sound-wave test, distance loading area edge 50cm, and fifth sound ripple instrument connection is affected by loading equipemtn, needs to fit into row acoustic wave measurement over holes with first to fourth cement bond logging prospect hole, and the instrument connection degree of depth is about 10m.
Then, install pressurized equipment, time effect test to pressurization and pressure stabilizing device precision and stability require higher, it is ensured that equipment can long-time steady operation, the load capability scope of pressurized equipment is recommended as 0 ~ 90MPa, the precision of voltage regulation less than full scale 2%.Pressurized equipment of the present utility model is as it is shown in figure 1, directly applied to rigid bearing plate by jack, and centre arranges backing plate to ensure uniform force.Contact with hole, top top girth rock by passing column, it is ensured that stablizing of loading equipemtn.
In order to ensure that force-bearing of surrounding rock mass is uniform, needing hierarchical loading, grading control is at 5 ~ 10 grades, and every grade of load time is 1 ~ 2 day, and when loading stress reaches design pressure, voltage stabling control is 10 ~ 30 days, and on-load pressure is less than the 80% of rock mass strength.
Before loading, first carry out 1 infrasonic wave test, then every grade load after test 1 time, during design pressure to be achieved, tested 1 time every 1 day, draw velocity of wave versus time curve, just can get degree of injury in time with the change procedure of on-load pressure.
Claims (4)
1. a rock convergence measure time effect test structure, it is characterized in that: described test structure is arranged in underground chamber, described test structure includes top backing plate, force-transmitting pole and backing plate at bottom, described top backing plate is arranged on the hole rimrock wall of underground chamber, described force-transmitting pole connects described top backing plate and described backing plate at bottom, arranging hydraulic jack below described backing plate at bottom, described hydraulic jack is arranged on test country rock by rigid bearing plate；It is disposed with cement bond logging prospect hole in described test country rock.
2. a kind of rock convergence measure time effect test structure as claimed in claim 1, it is characterised in that: described cement bond logging prospect hole includes the first cement bond logging prospect hole being arranged in around loading area, the second sound wave instrument connection, the 3rd cement bond logging prospect hole, falling tone ripple instrument connection and is arranged in the fifth sound ripple instrument connection in the middle part of loading area.
3. a kind of rock convergence measure time effect test structure as claimed in claim 2, it is characterized in that: described first cement bond logging prospect hole, the second sound wave instrument connection, the 3rd cement bond logging prospect hole and falling tone ripple instrument connection are distributed on around described loading area, the edge 50cm of distance loading area.
4. a kind of rock convergence measure time effect test structure as claimed in claim 2, it is characterised in that: the degree of depth of described first cement bond logging prospect hole, the second sound wave instrument connection, the 3rd cement bond logging prospect hole, falling tone ripple instrument connection and fifth sound ripple instrument connection is 10cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295738.XU CN205484212U (en) | 2016-04-09 | 2016-04-09 | Country rock damage time effect test structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620295738.XU CN205484212U (en) | 2016-04-09 | 2016-04-09 | Country rock damage time effect test structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205484212U true CN205484212U (en) | 2016-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620295738.XU Active CN205484212U (en) | 2016-04-09 | 2016-04-09 | Country rock damage time effect test structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN205484212U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982214A (en) * | 2018-07-11 | 2018-12-11 | 中国电建集团华东勘测设计研究院有限公司 | Brittle rock degree of injury test method and rock permeability coefficient testing device |
| CN115979811A (en) * | 2022-12-30 | 2023-04-18 | 吴志勇 | Method for testing dynamic-static deformation parameters of rock mass in same body, same direction and synchronization |
-
2016
- 2016-04-09 CN CN201620295738.XU patent/CN205484212U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982214A (en) * | 2018-07-11 | 2018-12-11 | 中国电建集团华东勘测设计研究院有限公司 | Brittle rock degree of injury test method and rock permeability coefficient testing device |
| CN115979811A (en) * | 2022-12-30 | 2023-04-18 | 吴志勇 | Method for testing dynamic-static deformation parameters of rock mass in same body, same direction and synchronization |
| CN115979811B (en) * | 2022-12-30 | 2024-02-23 | 吴志勇 | Rock mass dynamic-static deformation parameter same-body, same-direction and synchronous testing method |
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