CN202787196U - Seepage-proofing and pressure reducing structure of deeply buried pressurized hydraulic tunnel concrete lining - Google Patents
Seepage-proofing and pressure reducing structure of deeply buried pressurized hydraulic tunnel concrete lining Download PDFInfo
- Publication number
- CN202787196U CN202787196U CN2012203624484U CN201220362448U CN202787196U CN 202787196 U CN202787196 U CN 202787196U CN 2012203624484 U CN2012203624484 U CN 2012203624484U CN 201220362448 U CN201220362448 U CN 201220362448U CN 202787196 U CN202787196 U CN 202787196U
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- Prior art keywords
- seepage
- proofing
- antiseepage
- pressure reducing
- vent
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model relates to a seepage-proofing and pressure reducing structure of a deeply buried pressurized hydraulic tunnel concrete lining, and aims to enable the pressurized hydraulic tunnel concrete lining to adapt to external water pressure conditions and guarantee no seepage of the internal water. The technical scheme includes that a pressurized hydraulic tunnel is of a composite bearing seepage-proofing structure formed by a concretion grouting ring and a concrete lining, and seepage-proofing and pressure reducing holes are distributed in the concrete lining at certain intervals. The seepage-proofing and pressure reducing structure is characterized in that water plugs are arranged in the seepage-proofing and pressure reducing holes and are fixedly connected to inner openings of the seepage-proofing and pressure reducing holes through springs, and rubber washers matched with the water plugs to realize opening and closing of the seepage-proofing and pressure reducing holes are fixed in the seepage-proofing and pressure reducing holes. The seepage-proofing and pressure reducing structure is applicable to water conservancy and hydropower engineering.
Description
Technical field
The utility model relates to a kind of buried pressure water worker tunnel concrete liner antiseepage pressure reduction structure.Be applicable to Hydraulic and Hydro-Power Engineering.
Background technology
In recent years, China has built large quantities of western hydroelectric project and Inter-Basin Water Transfer Project, the large increase that the Hydraulic and Hydro-Power Engineering its construction level has obtained, and a lot of technology all are in world lead level.Wherein buried, the big-length of the multidirectional height of pressure water worker tunnel, major diameter future development, the pressure water worker tunnel buried depth maximum that China is built surpass 2000m.Deep-lying tunnel is often brought high external water pressure problem, and high external water pressure is brought huge challenge to pressure water worker tunnel concrete liner structure design.
For the deep-lying tunnel liner structure, common method for designing is exactly the composite bearing leakage preventing structure that adopts consolidation grouting circle and concrete lining to form at present, bear huge external water pressure by the consolidation grouting circle, and concrete lining generally is subjected to the restriction of physical dimension, resist the limited in one's ability of external water pressure, often according to the external water pressure size, arrange vent in concrete lining, form permeable lining cutting, guarantee the critical external compressive resistance safety of liner structure.The method that forms permeable lining cutting at tunnel lining concrete structure layout vent is feasible in high external water pressure hole section, but consider that the tunnel rear external water pressure that puts into operation may be able to be changed by the supply situation, when internal water pressure during greater than external water pressure, will cause that water exosmoses in the pressure water worker tunnel, produce new problem.
Summary of the invention
The technical problems to be solved in the utility model is: for the problem of above-mentioned existence, a kind of buried pressure water worker tunnel concrete liner antiseepage pressure reduction structure is provided, make pressure water worker tunnel concrete liner can adapt to different external water pressure conditions, and guarantee not produce interior water and exosmose.
The technical scheme that the utility model adopts is: a kind of buried pressure water worker tunnel concrete liner antiseepage pressure reduction structure, this pressure water worker tunnel has the composite bearing leakage preventing structure of consolidation grouting circle and concrete lining composition, the antiseepage vent of array pitch between arranging necessarily in the concrete lining, it is characterized in that: described antiseepage vent is built-in with filler block, filler block is connected and fixed on the inboard aperture of antiseepage vent through spring, is fixed with the rubber washer that cooperates filler block to realize antiseepage vent switch in this antiseepage vent.
Described antiseepage vent body is that stainless steel is made, and hole week is welded with the twice water-ring.
The aperture, the outside of described antiseepage vent is provided with geotextiles anti-filter net.
The beneficial effects of the utility model are: the utility model can anti-the blend decompression operating mode of the buried pressure water worker of self adaptation tunnel concrete liner structure under different external water pressure conditions; utilize the elasticity of the inside and outside differential water pressures of tunnel and spring; automatically fasten or open filler block; be issued to sealing anti-seepage and drainage effect of easing stress in different operating modes; guarantee the safety of concrete lining structure; have better practical value to building pressure water worker tunnel under the buried Complex Hydrogeological Conditions, can be western hydroelectric project and provide reference with the in the future buried pressure water worker tunnel construction of West Line of South-North Water Transfer Project.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the enlarged drawing of A section among Fig. 1.
The specific embodiment
As shown in Figure 1 and Figure 2, present embodiment adopts consolidation grouting circle 1 and concrete lining 2 to form the composite bearing leakage preventing structure in pressure water worker tunnel, the antiseepage vent 3 of array pitch between concrete lining 2 interior layouts are certain, antiseepage vent 3 diameters 60 ~ 90mm, length is determined by concrete lining thickness, antiseepage vent 3 bodies adopt steel to make, and aperture, the outside is provided with geotextiles anti-filter net 8, and hole week is welded with twice water-ring 7.Mounting spring 4, filler block 5, rubber washer 6 in antiseepage vent 3 holes, wherein filler block 5 is connected and fixed on the inboard aperture of antiseepage vent 3 through spring 4, and rubber washer 6 is fixed on the inwall of hole, cooperates filler block 5 to realize antiseepage vents 3 switches.
The operating principle of antiseepage vent 3 is to utilize the elasticity of the inside and outside differential water pressures of tunnel and spring 4, automatically fastens or open filler block 5, is issued to sealing anti-seepage and drainage effect of easing stress in different operating modes, is specially:
1) when pressure water worker tunnel internal water pressure during greater than external water pressure, under the effect of spring 4 and internal water pressure, filler block 5 can automatic impaction rubber washers 6, form anti-seepage effect, and water can not exosmose in the tunnel.
2) when pressure water worker Tunnel External Water Pressure during greater than internal water pressure, outer water can act on the thrust to the tunnel center to filler block 5: when external water pressure is a bit larger tham internal water pressure, filler block 5 is owing to be subjected to the pulling force of spring 4, can't open immediately, can design according to the critical external compressive resistance supporting capacity of concrete lining structure the elasticity of spring, the poor critical external compressive resistance ability that is the concrete lining structure of inside and outside water pressure when opening filler block; When inside and outside differential water pressures during greater than the critical external compressive resistance ability of concrete lining structure, spring 4 elongations, filler block 5 can progressively be opened until all open, and forms the decompression drainage channel, guarantees the critical external compressive resistance safety of concrete lining structure.
For improving durability, antiseepage vent 3 and accessory can adopt stainless steel to carry out processing and fabricating, can consider pre-buried installation when concrete lining 2 construction.Aperture anti-filter net can adopt non-woven geotextile, and its effect is: prevent that when draining outer water cement granules is taken out of by current in the antiseepage carrying grouting circle, threatening is in the milk encloses seepage stability.
Claims (3)
1. buried pressure water worker tunnel concrete liner antiseepage pressure reduction structure, this pressure water worker tunnel has the composite bearing leakage preventing structure of consolidation grouting circle (1) and concrete lining (2) composition, the antiseepage vent (3) of array pitch between arranging necessarily in the concrete lining (2), it is characterized in that: described antiseepage vent (3) is built-in with filler block (5), filler block (5) is connected and fixed on the inboard aperture of antiseepage vent (3) through spring (4), is fixed with the rubber washer (6) that cooperates filler block (5) to realize antiseepage vent (3) switch in this antiseepage vent (3).
2. buried pressure water worker tunnel concrete liner antiseepage pressure reduction structure according to claim 1, it is characterized in that: described antiseepage vent (3) body is that stainless steel is made, and is welded with twice water-ring (7) hole week.
3. buried pressure water worker tunnel concrete liner antiseepage pressure reduction structure according to claim 1 and 2, it is characterized in that: the aperture, the outside of described antiseepage vent (3) is provided with geotextiles anti-filter net (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203624484U CN202787196U (en) | 2012-07-25 | 2012-07-25 | Seepage-proofing and pressure reducing structure of deeply buried pressurized hydraulic tunnel concrete lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203624484U CN202787196U (en) | 2012-07-25 | 2012-07-25 | Seepage-proofing and pressure reducing structure of deeply buried pressurized hydraulic tunnel concrete lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202787196U true CN202787196U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203624484U Expired - Lifetime CN202787196U (en) | 2012-07-25 | 2012-07-25 | Seepage-proofing and pressure reducing structure of deeply buried pressurized hydraulic tunnel concrete lining |
Country Status (1)
| Country | Link |
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| CN (1) | CN202787196U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332716A (en) * | 2015-11-18 | 2016-02-17 | 中国水利水电科学研究院 | Adaptive lining structure capable of bearing simultaneous actions of high internal and external water |
| CN106759169A (en) * | 2017-01-22 | 2017-05-31 | 国家电网公司 | A kind of lining cutting and preparation method thereof |
| CN107975018A (en) * | 2017-12-05 | 2018-05-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Method and structure for improving external pressure resistance stability of pressure steel pipe |
-
2012
- 2012-07-25 CN CN2012203624484U patent/CN202787196U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332716A (en) * | 2015-11-18 | 2016-02-17 | 中国水利水电科学研究院 | Adaptive lining structure capable of bearing simultaneous actions of high internal and external water |
| CN105332716B (en) * | 2015-11-18 | 2017-06-06 | 中国水利水电科学研究院 | The self adaptation liner structure that water is acted on simultaneously inside and outside height can be born |
| CN106759169A (en) * | 2017-01-22 | 2017-05-31 | 国家电网公司 | A kind of lining cutting and preparation method thereof |
| CN107975018A (en) * | 2017-12-05 | 2018-05-01 | 中国电建集团贵阳勘测设计研究院有限公司 | Method and structure for improving external pressure resistance stability of pressure steel pipe |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |