CN204849791U - Structure of earth rock cofferdam prevention of seepage system - Google Patents
Structure of earth rock cofferdam prevention of seepage system Download PDFInfo
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- CN204849791U CN204849791U CN201520600055.6U CN201520600055U CN204849791U CN 204849791 U CN204849791 U CN 204849791U CN 201520600055 U CN201520600055 U CN 201520600055U CN 204849791 U CN204849791 U CN 204849791U
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Abstract
(B, ) the utility model discloses a structure of earth rock cofferdam prevention of seepage system, this structure includes the weir body, and the upstream face of the weir body is equipped with the ratchel throwing and fills out the bank protection, and the ratchel is equipped with the laid dry stone on throwing and filling out the bank protection, and the back side of laid dry stone is equipped with bank protection transition material, weir body middle part is equipped with the compound geomembrane that sets up along weir body length direction one, and compound geomembrane bottom is equipped with the clay groove of intercepting water, intercepts water the groove through bed course concrete and clay and is connected in compound geomembrane base, and compound geomembrane topside is through facing concrete and weir closed connection of body top surface, and complex geomembrane both ends imbed the sloping concrete of bank. The utility model discloses an at the compound geomembrane of earth rock cofferdam internal layout to set up the clay groove of intercepting water at the weir base, form the prevention of seepage system, can satisfy the needs of water conservancy diversion in the construction of middle -size and small -size hydraulic and hydroelectric engineering, compare with traditional prevention of seepage mode and reduced the construction degree of difficulty, practiced thrift the construction investment, shortened construction period. (B, )
Description
Technical field
the utility model relates to a kind of structure of seepage control for rock-earth cofferdam system, belongs to the hydraulic architecture technical field in Hydraulic and Hydro-Power Engineering.
Background technology
in Construction for Hydroelectric Project water conservancy diversion process, the seepage prevention system of earth rock cofferdam is in the status of the most important thing, is directly connected to the success or failure of engineering.At present in hydroelectric project, hydraulic engineering, the antiseepage in cofferdam adopts the structure such as concrete cut, gunite sheet-pile mostly, although said structure can meet requirement of engineering, there is the problem that cost is higher, the construction period is longer.For medium and small project, it is large to there is difficulty of construction in technique scheme, long in time limit, the problem that construction costs is high.
Utility model content
the purpose of this utility model is, a kind of construction method and structure of seepage control for rock-earth cofferdam system are provided, large, long in time limit with the seepage prevention system difficulty of construction solving middle-size and small-size Hydraulic and Hydro-Power Engineering earth rock cofferdam, the problem that construction costs is high, thus overcome the deficiencies in the prior art.
the technical solution of the utility model is achieved in that
the structure of a kind of seepage control for rock-earth cofferdam system of the present utility model is that this structure comprises weir body, and the upstream face of weir body is provided with ratchel throwing bank protection, is provided with laid dry stone on ratchel throwing bank protection, and the back side of laid dry stone is provided with bank protection Transition Materials; The composite geo-membrane arranged along body length direction, weir is together provided with in the middle part of the body of weir, clay cutoff trench is provided with bottom composite geo-membrane, composite geo-membrane base is connected with clay cutoff trench through blinding concrete, composite geo-membrane top margin is closed through facing concrete and weir body end face and is connected, composite geo-membrane two ends embedding bank slope concrete.
in aforementioned seepage control for rock-earth cofferdam architecture, described composite geo-membrane both sides are filled with antiseepage Transition Materials.
owing to have employed technique scheme, the utility model compared with prior art, the utility model passes through at earth rock cofferdam internal placement composite geo-membrane, and clay cutoff trench is set at weir base, form seepage prevention system, the needs of water conservancy diversion in middle-size and small-size Construction for Hydroelectric Project can be met, reduce difficulty of construction compared with traditional antiseepage mode, save construction investment, shorten the construction period.
Accompanying drawing explanation
fig. 1 is structural representation of the present utility model.
mark in accompanying drawing: 1-composite geo-membrane, 2-antiseepage Transition Materials, 3-blinding concrete, 4-clay cutoff trench, 5-facing concrete, 6-ratchel throwing bank protection, 7-laid dry stone, 8-bank protection Transition Materials, 9-weir body.
Detailed description of the invention
below in conjunction with drawings and Examples, the utility model is described in further detail, but not as to any restriction of the present utility model.
the utility model is that the method is a kind of method being suitable for the seepage prevention system constructing middle-size and small-size Hydraulic and Hydro-Power Engineering earth rock cofferdam constructed by the construction method of following a kind of seepage control for rock-earth cofferdam system; The method eliminates the conventional concrete cut of large water conservancy hydroelectric engineering earth rock cofferdam or gunite sheet-pile structure; The method is as shown in Figure 1: weir body 9 adopts composite geo-membrane 1 to carry out antiseepage, and weir base adopts clay cutoff trench 4 to carry out antiseepage; Limit, composite geo-membrane top 1 is closed by the facing concrete 5 at weir body 9 top, and composite geo-membrane 1 base is combined with clay cutoff trench 4 to be formed by blinding concrete 3 closes seepage prevention system.Clay cutoff trench 4 two ends connect with two sides basement rock, and composite geo-membrane 1 two ends in weir body 9 embed bank slope concrete, and bank slope concrete is excavated to after basement rock until bank slope, carries out building and squeeze into anchor pole being fixed.Composite geo-membrane 1 both sides adopt antiseepage Transition Materials 2 to protect, and antiseepage Transition Materials 2 raises with the synchronous successively place mat of weir body 9, every place mat one deck with regard to grinding compacting one deck, until reach weir body 9 design height.
the structure of of the present utility model a kind of seepage control for rock-earth cofferdam system of constructing as stated above, as shown in Figure 1, this structure comprises weir body 9, the upstream face of weir body 9 is provided with ratchel throwing bank protection 6, be provided with laid dry stone 7 on ratchel throwing bank protection 6, the back side of laid dry stone 7 is provided with bank protection Transition Materials 8; The composite geo-membrane 1 arranged along body length direction, weir is together provided with in the middle part of weir body 9, clay cutoff trench 4 is provided with bottom composite geo-membrane 1, composite geo-membrane 1 base is connected with clay cutoff trench 4 through blinding concrete 3, composite geo-membrane 1 top margin is closed through facing concrete 5 and weir body 9 end face and is connected, composite geo-membrane 1 two ends embedding bank slope concrete.Composite geo-membrane 1 both sides are filled with antiseepage Transition Materials 2.
Embodiment
the seepage control for rock-earth cofferdam system of this example mainly comprises composite geo-membrane 1, antiseepage Transition Materials 2, blinding concrete 3 and clay cutoff trench 4.The weir body 9 of this example adopts composite geo-membrane 1 to carry out antiseepage, and weir base adopts clay cutoff trench 4 to carry out antiseepage; Both combine to be formed by blinding concrete 3 and close seepage prevention system.This example is mainly used in the antiseepage of water conservancy diversion earth rock cofferdam in middle-size and small-size Construction for Hydroelectric Project, and the concrete cut in constructing with existing large water conservancy hydroelectric engineering is compared with gunite sheet-pile and reduced construction investment, saved the construction period.During Specific construction, the situation clay cutoff trench 4 thicker for covering layer, weir body 9 excavation of foundation pit is darker should connect with two sides basement rock, composite geo-membrane 1 in weir body 9 should embed bank slope concrete, and bank slope concrete is excavated to after basement rock until bank slope, carries out building and squeeze into anchor pole being fixed.Composite geo-membrane 1 both sides adopt antiseepage Transition Materials to protect, and when during construction diversion, head is larger, antiseepage Transition Materials 2 need be considered to thicken and grinding compacting, to guarantee the safety of composite geo-membrane 1.
as follows in the present embodiment work progress:
1, first according to the factor such as high water head, the dam excavation of foundation pit degree of depth most during construction diversion, after being analyzed by seepage flow stability computation, should consider and choose impervious form.
when 2, damming, form dam of closure at weir body 9 upstream face, after dam of closure is formed, when streamflow is let out from outlet structure escape works, in dam of closure downstream, first heap is built simple and easy cofferdam and lays interim seepage control measure.
3, after simple and easy seepage prevention of cofferdam measure completes, at its downstream excavation clay cutoff trench 4, and backfill clay grinding compacting, clay cutoff trench 4 cutting depth, width, determine according to the dam excavation of foundation pit degree of depth, seepage flow stability computation etc.
4, after clay cutoff trench 4 completes, build blinding concrete 3 in the above and embed composite geo-membrane 1, backfill simultaneously rolls weir body 9, composite geo-membrane 1 both sides adopt antiseepage Transition Materials 2 to protect, and antiseepage Transition Materials 2 grating protects requirement to determine according to high water head most during construction diversion and composite geo-membrane 1; Weir body 9 adopts composite geo-membrane 1 to embed bank slope concrete with the joint area of two sides, and bank slope concrete, after being excavated to basement rock, is built, and weir base clay cutoff trench 4 connects with bank slope basement rock.
5, after weir body 9 completes, build facing concrete 5 at an upper portion thereof and protect composite geo-membrane 1, seepage prevention of cofferdam system completes.
supplementary notes of the present utility model
described antiseepage Transition Materials 2 refers to as shown in Figure 1 and is filled in the Transition Materials of composite geo-membrane 1 both sides for the protection of composite geo-membrane 1.
described bank protection Transition Materials 8 refers to the Transition Materials being positioned at laid dry stone 7 as shown in Figure 1.
described clay cutoff trench 4 cross sectional shape is illustrated in figure 1 the trapezoidal-structure that base is less than top margin.
described weir body 9 cross sectional shape is illustrated in figure 1 the trapezoidal-structure that base is greater than top margin, and the upstream face of weir body 9 is provided with ratchel throwing bank protection 6, is provided with laid dry stone 7 on ratchel throwing bank protection 6, and the back side of laid dry stone 7 is provided with bank protection Transition Materials 8.
described composite geo-membrane 1 cross sectional shape is illustrated in figure 1 corrugated, has certain elasticity, to prevent from being burst at filling antiseepage Transition Materials 2.
described antiseepage Transition Materials 2 cross sectional shape is illustrated in figure 1 the trapezoidal-structure that base is greater than top margin.
Claims (2)
1. the structure of a seepage control for rock-earth cofferdam system, comprise weir body (9), the upstream face of weir body (9) is provided with ratchel throwing bank protection (6), is provided with laid dry stone (7) on ratchel throwing bank protection (6), and the back side of laid dry stone (7) is provided with bank protection Transition Materials (8); It is characterized in that: weir body (9) middle part is provided with the composite geo-membrane (1) arranged along body length direction, weir together, composite geo-membrane (1) bottom is provided with clay cutoff trench (4), composite geo-membrane (1) base is connected with clay cutoff trench (4) through blinding concrete (3), composite geo-membrane (1) top margin is closed through facing concrete (5) and weir body (9) end face and is connected, composite geo-membrane (1) two ends embedding bank slope concrete.
2. the structure of seepage control for rock-earth cofferdam system according to claim 1, is characterized in that: described composite geo-membrane (1) both sides are filled with antiseepage Transition Materials (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520600055.6U CN204849791U (en) | 2015-08-11 | 2015-08-11 | Structure of earth rock cofferdam prevention of seepage system |
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| CN201520600055.6U CN204849791U (en) | 2015-08-11 | 2015-08-11 | Structure of earth rock cofferdam prevention of seepage system |
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| CN204849791U true CN204849791U (en) | 2015-12-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839653A (en) * | 2016-05-18 | 2016-08-10 | 中铁隧道集团二处有限公司 | Construction method for reconstructing cofferdam anti-seepage system in immersed tube tunnel |
| CN115450236A (en) * | 2022-09-15 | 2022-12-09 | 中国葛洲坝集团国际工程有限公司 | Cofferdam anti-seepage structure and construction method thereof |
-
2015
- 2015-08-11 CN CN201520600055.6U patent/CN204849791U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839653A (en) * | 2016-05-18 | 2016-08-10 | 中铁隧道集团二处有限公司 | Construction method for reconstructing cofferdam anti-seepage system in immersed tube tunnel |
| CN105839653B (en) * | 2016-05-18 | 2018-06-08 | 中铁隧道集团二处有限公司 | A kind of immersed tube tunnel rebuilds the construction method of seepage prevention of cofferdam system |
| CN115450236A (en) * | 2022-09-15 | 2022-12-09 | 中国葛洲坝集团国际工程有限公司 | Cofferdam anti-seepage structure and construction method thereof |
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