CN206440589U - A kind of country rock initial infiltration coefficient test structure - Google Patents
A kind of country rock initial infiltration coefficient test structure Download PDFInfo
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- CN206440589U CN206440589U CN201720010139.3U CN201720010139U CN206440589U CN 206440589 U CN206440589 U CN 206440589U CN 201720010139 U CN201720010139 U CN 201720010139U CN 206440589 U CN206440589 U CN 206440589U
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- country rock
- infiltration coefficient
- pressure water
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Abstract
The utility model provides a kind of country rock initial infiltration coefficient test structure, including testing hole and being arranged in pressure water hole and the monitoring holes of test hole both sides, test hole bottom sets test section, the hole footpath in not less than one times test hole of the overhead height of the test section, pressure water hole top connects high-pressure hydraulic pump, arrangement current test sensor in the monitoring holes, the current test sensor is connected with data acquisition device.The utility model has effectively evaded the influence that damage zone is tested country rock infiltration coefficient, more accurately reflect the real physical mechanics state of country rock, and with original water pressure test equipment substantially always, operating process is simple, is easy to building site popularization and application for used equipment.
Description
Technical field
The utility model is related to underground engineering field, more particularly to country rock initial infiltration coefficient measuring technology.
Background technology
Accurate geologic parameter is most important for the construction of underground engineering, especially for water power, nuclear waste srorage etc.
Whether the engineering being had a major impact to environment, geologic parameter is accurately directly connected to public safety.The physical mechanics of original country rock
Characteristic is mainly influenceed by self structure, fracture state and external environment.But it is due to that underground engineering is generally in crustal stress
Under effect, after engineering excavation, stress is disturbed, and carries out secondary adjustment, stress concentration is produced near the underground engineering of excavation
Area and stress relaxation area.Country rock is influenceed by Stress relief, and damage will be produced inside country rock, and the presence of damage will be directly affected
The physico mechanical characteristic of country rock, and in damage zone country rock carry out test can not the original country rock of true representations physical force
Learn characteristic.
The infiltration coefficient of country rock is to represent a strong and weak quantitative target of country rock permeability, the correct measure of its numerical value for
Evaluate rock integrity it is significant, influence osmotic coefficient investigating factor it is numerous, for example rock mass structure, Fracture Networks,
Hydraulic pressure etc., the exact theoretical formula that set up infiltration coefficient is relatively difficult, generally adopts experimentally, including experimental determination
Method, on-the-spot test method and method for numerical simulation, wherein on-the-spot test method yardstick are bigger, can more reflect live country rock
Practical structures feature, tests the infiltration coefficient obtained also more representative.
Although infiltration coefficient test is commonly used in engineering site, with the continuous increasing of underground engineering buried depth
Plus, country rock inevitably will suffer from damage during Stress relief, is formed to excavate in the country rock on underground engineering periphery and damaged
There is marked difference in the country rock infiltration coefficient hindered in area, damage zone, what is carried out in damage zone oozes with country rock initial infiltration coefficient
Saturating coefficient test can not represent the true permeance property of country rock.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of country rock initial infiltration coefficient test structure, the test
Structure can directly test the permeability of country rock in non-damage zone, evade damage zone and exist on the infiltrative influence of country rock.
The utility model solves the technical scheme that is used of above-mentioned technical problem：A kind of country rock initial infiltration coefficient test
Structure, including test hole and the pressure water hole and the monitoring holes that are arranged in test hole both sides, test hole bottom set test section,
The hole footpath in not less than one times test hole of the overhead height of the test section, pressure water hole top connection high-pressure hydraulic pump, the prison
Arrangement current test sensor in gaging hole, the current test sensor is connected with data acquisition device.
While using above-mentioned technical proposal, the utility model can also be used or combined using further below
Technical scheme：
The pressure water hole and monitoring holes at the top of the test section more than region arrange seal sleeve.
The depth of the test section is 0.5-1m.
The depth of the pressure water hole and monitoring holes tests Dong Dong footpaths more than 1 times, and the bore diameter for pressing water hole and monitoring holes is
150~180mm。
A diameter of 100 ~ 130mm of seal sleeve, more than 1 times test Dong Dong footpath of seal sleeve length, and reserved 0.5 ~ 1m
Drilling depth is used as test zone.
The buried depth of current test sensor is located at the middle part of test section.
The beneficial effects of the utility model are：The utility model provides a kind of test knot of country rock initial infiltration coefficient
Structure, has effectively evaded the influence that damage zone is tested country rock infiltration coefficient, more accurately reflects the real physical mechanics of country rock
State, and used equipment and original water pressure test equipment are substantially always, and operating process is simple, and being easy to building site to promote should
With.
Brief description of the drawings
Fig. 1 is overall structure figure of the present utility model.
Embodiment
Referring to the drawings.
Test structure of the present utility model includes two drillings excavated downwards along the bottom plate in test hole 7, and one is pressure water
Hole 1 is used for packer permeability test, and one is that monitoring holes 2 are gathered for Monitoring Data.In two drill, it is both needed to from test hole bottom plate 3
4 arrange seal sleeve 5 at the top of to test section, it is to avoid current enter in non-test region, influence final test result.In monitoring
Current test sensor 6 is arranged in hole 2, and is connected with data collecting instrument 8, packer permeability test is carried out in instrument connection 7, i.e. pressure water
The top connection high-pressure hydraulic pump 9 in hole 1, is arranged between flowmeter 10 and stressometer 11, is noted by high-pressure hydraulic pump into pressure water hole 1
Water, so as to carry out packer permeability test to test section 12, the top of test section 12 is that rock excavates damage around hole to testing between the bottom plate of hole 7
Area.
Specific embodiment is as follows：
（1）Designated depth is got into pressure water hole and monitoring holes, this depth will more than 1 times test Dong Dong footpath, 1.5 ~ 2.0 times of holes
Footpath is advisable, and the bore diameter of pressure water hole and monitoring holes is 150 ~ 180mm, to facilitate install sensor and sleeve.
（2）Seal sleeve is arranged in the borehole, and sleeve diameter is 100 ~ 130mm, and length sleeve will the hole hole of the test more than 1 times
Footpath, it is to avoid sustain damage influence of the area to hydraulic pressure test, and reserves 0.5 ~ 1m drilling depths as test zone.
（3）Current test sensor is embedded in instrument connection, buried depth is located at the middle part of test zone, and and data
Acquisition Instrument is connected.
（4）Carry out packer permeability test in instrument connection, the control of pressure water pressure in 0.1 ~ 0.5MPa, using connection flowmeter and
Stressometer obtains the initial flow and pressure of current.
（5）Sensor test current are tested using current and pass through flow and pressure behind test section, in being drilled according to two
The contrast of water flow pressure and flow, just can calculate the infiltration coefficient for obtaining test zone.Because test zone herein is avoided
The Excavation damage zone in hole week, therefore the infiltration coefficient now measured, are just the initial infiltration coefficient of country rock.
Claims (6)
1. a kind of country rock initial infiltration coefficient test structure, it is characterised in that：Including testing hole and being arranged in test hole both sides
Pressure water hole and monitoring holes, test hole bottom sets test section, not less than the one times test of the overhead height of the test section
Arrangement current test sensor in the hole footpath in hole, pressure water hole top connection water pump, the monitoring holes, the current test is passed
Sensor is connected with data acquisition device.
2. a kind of country rock initial infiltration coefficient test structure according to claim 1, it is characterised in that：The pressure water hole and
Monitoring holes at the top of the test section more than region arrange seal sleeve.
3. a kind of country rock initial infiltration coefficient test structure according to claim 1, it is characterised in that：The test section
Depth is 0.5-1m.
4. a kind of country rock initial infiltration coefficient test structure according to claim 1, it is characterised in that：The pressure water hole and
The bore diameter of more than 1 times test Dong Dong footpath of the depth of monitoring holes, pressure water hole and monitoring holes is 150 ~ 180mm.
5. a kind of country rock initial infiltration coefficient test structure according to claim 2, it is characterised in that：Seal sleeve it is straight
Footpath is 100 ~ 130mm, and seal sleeve length tests Dong Dong footpaths more than 1 times, and reserved 0.5 ~ 1m drilling depths are used as test zone.
6. a kind of country rock initial infiltration coefficient test structure according to claim 1, it is characterised in that：Current test sensing
The buried depth of device is located at the middle part of test section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720010139.3U CN206440589U (en) | 2017-01-05 | 2017-01-05 | A kind of country rock initial infiltration coefficient test structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720010139.3U CN206440589U (en) | 2017-01-05 | 2017-01-05 | A kind of country rock initial infiltration coefficient test structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206440589U true CN206440589U (en) | 2017-08-25 |
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ID=59643597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720010139.3U Active CN206440589U (en) | 2017-01-05 | 2017-01-05 | A kind of country rock initial infiltration coefficient test structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN206440589U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470621A (en) * | 2018-12-13 | 2019-03-15 | 重庆科技学院 | A kind of measuring device for formation permeability |
| CN109975169A (en) * | 2017-12-28 | 2019-07-05 | 核工业北京地质研究院 | A kind of country rock gas permeability coefficient test method |
-
2017
- 2017-01-05 CN CN201720010139.3U patent/CN206440589U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109975169A (en) * | 2017-12-28 | 2019-07-05 | 核工业北京地质研究院 | A kind of country rock gas permeability coefficient test method |
| CN109470621A (en) * | 2018-12-13 | 2019-03-15 | 重庆科技学院 | A kind of measuring device for formation permeability |
| CN109470621B (en) * | 2018-12-13 | 2021-01-26 | 重庆科技学院 | Measuring device for rock stratum permeability |
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