CN104314089A - Method for composite geo-membrane sloping core cofferdam - Google Patents
Method for composite geo-membrane sloping core cofferdam Download PDFInfo
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- CN104314089A CN104314089A CN201410627016.5A CN201410627016A CN104314089A CN 104314089 A CN104314089 A CN 104314089A CN 201410627016 A CN201410627016 A CN 201410627016A CN 104314089 A CN104314089 A CN 104314089A
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- weir
- membrane
- concrete
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- cofferdam
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
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Abstract
The invention discloses a method for a composite geo-membrane sloping core cofferdam. A buffer platform is reserved between an anti-seepage structure and a weir foot by moving a lower anti-seepage structure forwards, so that the synchronous construction of the lower anti-seepage structure and weir body filling is facilitated. A weir body comprises a weir body concrete extruding side wall, a weir body bedding material, a weir body transition material and a weir body rockfill material from upstream to downstream in sequence. The top of the lower anti-seepage structure is provided with anchoring concrete; the anchoring concrete is arranged after the weir top is filled to the top. The top and the bottom of a composite geo-membrane are provided with telescopic joints respectively and are anchored with the concrete at the weir top and the weir bottom respectively; the surface of the composite geo-membrane is protected by spraying the concrete. By using the method, conditions are created for parallel construction of the lower anti-seepage structure and the weir body filling, the weir body partition is simplified, the straight construction period is favorably shortened, the engineering construction progress is quickened, the engineering safety flood season is guaranteed, and the economic and social benefits are obvious.
Description
Technical field
The present invention relates to a kind of method being applied to the composite geo-membrane sloping core cofferdam of Hydraulic and Hydro-Power Engineering, belong to Hydraulic and Hydro-Power Engineering technical field.
Background technology
In Hydraulic and Hydro-Power Engineering, in order to create dam dry work condition, blocking riverbed by the mode of damming, filling cofferdam, and take seepage control measure to control seepage flow, for dam foundation ditch creates dry work condition.In seepage prevention of cofferdam measure, composite geo-membrane is cheap with it, easy construction is widely used in seepage prevention of cofferdam, and existing technology is based on composite geomembrane core cofferdam.
Due to the particularity of Hydraulic and Hydro-Power Engineering, cofferdam and seepage prevention system thereof must complete within a dry season, and first flood season namely after damming will play the dash effect of passing the flood period, cofferdam and seepage prevention system construction period very short, the duration is very nervous.As can not be completed cofferdam and seepage prevention system construction thereof on schedule, the Dam Construction duration, by postponement 1 year, postpones generating, causes huge economic loss; Meanwhile, as cofferdam and seepage prevention system thereof cannot complete before flood, be faced with huge engineering safety risk flood season, jeopardize downstream people life property safety.
No matter be adopt composite geomembrane core leakage preventing structure, or adopt sloping core leakage preventing structure, often all will connect the leakage preventing structure such as concrete cut or grouted cut off wall below the base of weir, be connected with geomembrane, jointly to form seepage prevention system.Adopt seepage prevention of core wall structural shape, after damming, bottom leakage preventing structure, cofferdam fill and watertight core construction becomes the straight line duration, namely after bottom leakage preventing structure has been constructed, the cofferdam just carrying out top is filled and watertight core construction, cause the straight line duration longer, the difficulty completing cofferdam and seepage prevention system construction thereof in the dry season is larger.
Summary of the invention
The object of the invention is for Hydraulic and Hydro-Power Engineering cofferdam, provide a kind of method of composite geo-membrane sloping core cofferdam, the method is conducive to speeding up the work, and guarantees that engineering safety is passed the flood period.
The present invention adopts composite geo-membrane sloping core leakage preventing structure to substitute seepage prevention of core wall structure, and bottom leakage preventing structure is moved forward to upstream, cofferdam, and bottom leakage preventing structure and cofferdam can be made to fill synchronous construction.Concrete grammar is as follows:
After dam of closure has filled, upstream filling construction platform, at construction bottom, upstream leakage preventing structure, bottom leakage preventing structure top anchor concrete, and carry out cofferdam filling construction at downstream synchronization, weir, cofferdam body is all followed successively by concrete squeezing sidewall, weir body bedding material, weir body Transition Materials, weir body stockpile filling construction to downstream from upstream, top is filled in cofferdam, weir crest portion arranges anchoring concrete, then the composite geo-membrane carrying out upstream face is laid, composite geo-membrane top and the anchoring of weir crest anchoring concrete; With the anchoring of bottom leakage preventing structure anchoring concrete bottom composite geo-membrane, with clay blanket ballast and auxiliary seepage proof above weir crest anchoring concrete, expansion coupling is reserved bottom weir crest and weir, to adapt to cofferdam sedimentation and deformation, reduce the stress at weir crest portion and bottom anchor position, weir, on composite geo-membrane surface, pneumatically placed concrete closes protection.
Method of the present invention is that bottom leakage preventing structure and weir body fill parallel construction and create condition, simplifies weir body subregion, and be conducive to shortening the straight line duration, accelerate engineering construction progress, guarantee that engineering safety is passed the flood period, economic and social profit is remarkable.
Accompanying drawing explanation
Fig. 1 is the cross-sectional schematic diagram in composite geo-membrane sloping core cofferdam of the present invention.
In figure: 1-initial land form line, 2-dam of closure, 3-bottom leakage preventing structure, 4-bottom leakage preventing structure top anchor concrete, 5-cofferdam axis, 6-weir body stockpile, 7-weir body Transition Materials, 8-weir body bedding material, 9-weir body concrete extrusion side wall, 10-composite geo-membrane sloping core, 11-composite geo-membrane expansion coupling, 12-pneumatically placed concrete, 13-weir crest anchoring concrete, 14-clay blanket, 15-weir crest wave wall.
Detailed description of the invention
As shown in Figure 1, after dam of closure 2 has filled, first upstream filling construction platform, at construction bottom, upstream leakage preventing structure 3, bottom leakage preventing structure top anchor concrete 4, meanwhile, cofferdam filling construction is carried out at downstream synchronization, each layer weir, cofferdam body that fill all is followed successively by concrete squeezing sidewall 9 from upstream to downstream, weir body bedding material 8, weir body Transition Materials 7, weir body stockpile 6 filling construction, top is filled in cofferdam, weir crest portion arranges anchoring concrete 13, then the composite geo-membrane 10 carrying out upstream face is laid, composite geo-membrane top adopts mechanical anchor mode and the anchoring of weir crest anchoring concrete, mechanical anchor mode and the anchoring of bottom leakage preventing structure anchoring concrete is adopted bottom composite geo-membrane, with clay blanket 14 ballast and auxiliary seepage proof above anchoring concrete at the bottom of weir, expansion coupling 11 is reserved bottom weir crest and weir, to adapt to cofferdam sedimentation and deformation, reduce the stress at weir crest portion and bottom anchor position, weir, on composite geo-membrane surface, pneumatically placed concrete closes protection, at weir crest portion anchoring groove concreting weir crest wave wall 15, reserved buffer platform between weir, cofferdam pin and bottom leakage preventing structure axis, in order to synchronous construction.
Claims (5)
1. the method in composite geo-membrane sloping core cofferdam, is characterized in that being carried out as follows:
After dam of closure has filled, upstream filling construction platform, at construction bottom, upstream leakage preventing structure, bottom leakage preventing structure top anchor concrete, and carry out cofferdam filling construction at downstream synchronization, weir, cofferdam body is all followed successively by concrete squeezing sidewall, weir body bedding material, weir body Transition Materials, weir body stockpile filling construction to downstream from upstream, top is filled in cofferdam, weir crest portion arranges anchoring concrete, then the composite geo-membrane carrying out upstream face is laid, composite geo-membrane top and the anchoring of weir crest anchoring concrete; With the anchoring of bottom leakage preventing structure anchoring concrete bottom composite geo-membrane, with clay blanket ballast and auxiliary seepage proof above weir crest anchoring concrete, expansion coupling is reserved bottom weir crest and weir, to adapt to cofferdam sedimentation and deformation, reduce the stress at weir crest portion and bottom anchor position, weir, on composite geo-membrane surface, pneumatically placed concrete closes protection.
2. the method in composite geo-membrane sloping core cofferdam according to claim 1, is characterized in that composite geo-membrane top adopts mechanical anchor mode and the anchoring of weir crest anchoring concrete.
3. the method in composite geo-membrane sloping core cofferdam according to claim 1, is characterized in that adopting mechanical anchor mode and the anchoring of bottom leakage preventing structure anchoring concrete bottom composite geo-membrane.
4. the method in composite geo-membrane sloping core cofferdam according to claim 1, is characterized in that at weir crest portion anchoring groove concreting weir crest wave wall.
5. the method in composite geo-membrane sloping core cofferdam according to claim 1, is characterized in that reserved buffer platform between weir, cofferdam pin and bottom leakage preventing structure axis, in order to synchronous construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410627016.5A CN104314089A (en) | 2014-11-10 | 2014-11-10 | Method for composite geo-membrane sloping core cofferdam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410627016.5A CN104314089A (en) | 2014-11-10 | 2014-11-10 | Method for composite geo-membrane sloping core cofferdam |
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| Publication Number | Publication Date |
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| CN104314089A true CN104314089A (en) | 2015-01-28 |
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| CN201410627016.5A Pending CN104314089A (en) | 2014-11-10 | 2014-11-10 | Method for composite geo-membrane sloping core cofferdam |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354920A (en) * | 2017-07-20 | 2017-11-17 | 山东大学 | Combination against seepage structure and its construction method for culverts and water gates |
| CN107653842A (en) * | 2017-08-14 | 2018-02-02 | 合肥卓立雅工程材料科技有限公司 | A kind of geomembrane reservoir sloping core Seepage method |
| CN108677980A (en) * | 2018-07-12 | 2018-10-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Upstream cofferdam heightening method and structure with traffic function |
| CN108978689A (en) * | 2018-08-08 | 2018-12-11 | 中国水利水电第十二工程局有限公司 | A kind of method of holding one's breath of clay core wall earth rock cofferdam |
| CN114960707A (en) * | 2022-05-24 | 2022-08-30 | 浙江华东工程建设管理有限公司 | Inclined wall geomembrane earth rock cofferdam structure suitable for higher manger plate flood peak of geomembrane |
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| CN101086164A (en) * | 2007-05-10 | 2007-12-12 | 水电九局贵州基础工程有限责任公司 | Highly effective quick-speed anti-seep plugging technology for cofferdam |
| JP2009019449A (en) * | 2007-07-13 | 2009-01-29 | Hirose & Co Ltd | Water cut-off structure for cofferdam and water cut-off method |
| CN202945573U (en) * | 2012-11-08 | 2013-05-22 | 中国水电顾问集团华东勘测设计研究院 | Composite geo-membrane seepage-proofing connector wrapped by highly plastic clay |
| CN203113359U (en) * | 2013-03-18 | 2013-08-07 | 中国水电顾问集团成都勘测设计研究院 | Earth rock cofferdam structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107354920A (en) * | 2017-07-20 | 2017-11-17 | 山东大学 | Combination against seepage structure and its construction method for culverts and water gates |
| CN107354920B (en) * | 2017-07-20 | 2019-09-27 | 山东大学 | Combination against seepage structure and its construction method for culverts and water gates |
| CN107653842A (en) * | 2017-08-14 | 2018-02-02 | 合肥卓立雅工程材料科技有限公司 | A kind of geomembrane reservoir sloping core Seepage method |
| CN108677980A (en) * | 2018-07-12 | 2018-10-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Upstream cofferdam heightening method and structure with traffic function |
| CN108677980B (en) * | 2018-07-12 | 2023-10-31 | 中国电建集团贵阳勘测设计研究院有限公司 | Upstream cofferdam heightening method and structure taking traffic function into consideration |
| CN108978689A (en) * | 2018-08-08 | 2018-12-11 | 中国水利水电第十二工程局有限公司 | A kind of method of holding one's breath of clay core wall earth rock cofferdam |
| CN114960707A (en) * | 2022-05-24 | 2022-08-30 | 浙江华东工程建设管理有限公司 | Inclined wall geomembrane earth rock cofferdam structure suitable for higher manger plate flood peak of geomembrane |
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