CN207538055U - A kind of thin section broken line type cofferdam structure - Google Patents
A kind of thin section broken line type cofferdam structure Download PDFInfo
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- CN207538055U CN207538055U CN201721442387.1U CN201721442387U CN207538055U CN 207538055 U CN207538055 U CN 207538055U CN 201721442387 U CN201721442387 U CN 201721442387U CN 207538055 U CN207538055 U CN 207538055U
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- cofferdam
- broken line
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Abstract
The utility model provides a kind of thin section broken line type cofferdam structure, cofferdam axis uses broken line type, axis direction intersects in wide-angle with place streamflow direction, is substantially parallel with coombe trend or hydraulic tunnel axis, the weir phosphor bodies of the underwater placement part of cofferdam structure use rock ballast material, and weir body upstream face uses reinforced gabion pile and boulder bank protection；The upstream face that weir body is higher by working water level uses reinforced gabion piling structure erosion control, seepage prevention system is set in bedding material, back side uses rock ballast material, and Transition Materials are set between bedding material；As height increases, weir body section is to after-contraction.The utility model section build is thinner and other buildings is not interfered to arrange, adapt to the anti-impact requirement that two sides have coombe or hydraulic tunnel to bring, simultaneously topographic and geologic condition is suitable for by adjusting cofferdam axis, has the operating condition filled since under water, it is adaptable, while shorten and build the duration, save construction investment.
Description
Technical field
The utility model patent is related to a kind of thin section broken line type cofferdam structure, is primarily adapted for use in various hydraulic and hydroelectric engineerings
In.
Background technology
Hydraulic and hydroelectric engineering cofferdam mainly has earth rock cofferdam, concrete cofferdam, steel sheet-pile cofferdam, bamboo cage cofferdam, crib to enclose
Weir, turf cofferdam etc., wherein earth rock cofferdam, concrete cofferdam are most commonly seen due to its wide adaptability, construction technology maturation.Native stone
Cofferdam advantage is simple in structure, can be gathered materials on the spot, and not only convenient for rapid construction, but also is easy to remove, and in office where can be built on base, is lacked
Point is that cross dimensions is big, build " obesity ", and impact resistance is poor.The advantage of concrete cofferdam is that impact resistance is strong, and cross dimensions is small,
It is easy to same permanent construction to combine, shortcoming is cost height, and dry work environment is needed when building so that it is seated on batholith.
Hydraulic condition of river characteristic often requires that completion is built in cofferdam within a dry season, and it is usually more nervous to build the duration；
When since cofferdam need filled underwater when, just do not have the condition for building concrete cofferdam；When cofferdam is because of topographic and geologic condition
Reason, arrangement space are limited or nearer apart from coombe, hydraulic tunnel, when having higher anti-impact requirement, conventional earth rock cofferdam
It is difficult to meet engine request.
Utility model content
Technical problem to be solved in the utility model is：In view of the above problems, a kind of thin section broken line is provided
Type cofferdam structure, it is intended to which with reference to the advantages of conventional earth rock cofferdam and concrete cofferdam, duration anxiety, water are built in comprehensively solve cofferdam
Under start to fill, the global questions such as arrangement space is limited, anti-impact flow rates demand height.
Thin section broken line type cofferdam structure, it is positioned adjacent with coombe or hydraulic tunnel, it is characterised in that：
Cofferdam axis uses broken line type, and axis direction intersects outside with place streamflow direction in wide-angle, and also and coombe
Trend or hydraulic tunnel axis are substantially parallel, are washed away to avoid weir body by coombe or hydraulic tunnel mainstream；
The weir phosphor bodies of the underwater placement part of the cofferdam structure use rock ballast material, and weir body upstream face uses reinforced gabion
Pile and boulder bank protection；The cofferdam structure also sets underwater seepage prevention system in weir phosphor bodies；
The weir body is higher by the upstream face of working water level using reinforced gabion piling structure erosion control, and reinforced gabion rear side fills
Rock ballast material, Transition Materials, bedding material set seepage prevention system in bedding material；Back side uses rock ballast material, and is set between bedding material
Transition Materials；
Reinforced gabion thickness uses 3 ~ 10m, and as height increases, weir body section is to after-contraction.
Further, often rise 1m, for weir body section to after-contraction 1m, synthesis slope ratio is 1:1.
Further, the coombe or hydraulic tunnel are respectively provided in two sides.
The advantageous effect of the utility model patent is：The utility model is organic to have gathered earth rock cofferdam and concrete cofferdam two
The respective advantage of kind of cofferdam, section build is thinner and other buildings is not interfered to arrange, adapt to two sides have coombe or
The anti-impact requirement that hydraulic tunnel is brought, while topographic and geologic condition is suitable for by adjusting cofferdam axis, have since underwater
The operating condition filled, it is adaptable, while shorten and build the duration, save construction investment.
Description of the drawings
Fig. 1 is the plane structure chart of the utility model patent.
Fig. 2 is the construction profile of the utility model patent.
Specific embodiment
With reference to attached drawing.The thin section broken line type cofferdam structure 300 of the utility model, in its vicinity with coombe or water conservancy project tunnel
The hydraulic structures such as hole.Embodiment is as follows：
As shown in Figure 1, the cofferdam axis L uses broken line type, axis direction is in big angle with place streamflow direction D1
Degree is intersecting, and the angle of cut is typically no less than 60 °, also with coombe 100 move towards D2 and 200 axis of hydraulic tunnel is substantially parallel, to avoid
Weir body is washed away by coombe 100 or 200 mainstream of hydraulic tunnel.
B, as shown in Fig. 2, 1 throwing of rock ballast material for starting underwater placement part forms the weir phosphor bodies of underwater placement part.
C, 4 slope protection construction of 3 pile of reinforced gabion and boulder of underwater placement part upstream face is carried out.
D, it carries out underwater placement partial barrier system 2 to build, seepage prevention system 2 uses diaphram wall, using percussive drill
Pore-creating, high pressure spray jetting slurry liquid are into wall or using trench machine grooving, casting concrete into wall.
E, it carries out part rock ballast material weir body 11, Transition Materials 5, the bedding material 6 waterborne of filling to fill, while steel is carried out in upstream face
3 pile of muscle gabion.Bedding material 6 is in middle part, and front and rear sides are Transition Materials 5, then rock ballast material weir body 11 is is divided in outside.Bedding material
6 are no more than the metaling or sandy gravel of 40mm using grain size, and to protect seepage prevention system 7, Transition Materials 5 are no more than using grain size
The metaling or sandy gravel of 300mm.
F, it while filling part rising on the water, carries out partial barrier system 7 waterborne of filling and builds.Seepage prevention system 7 is adopted
With composite earthwork membrane structure, composite geo-membrane is made of geomembrane among the geotechnique's cloth clamp of both sides.
G, thin section broken line type cofferdam structure is filled to top, builds completion.
Reinforced gabion thickness uses 3 ~ 10m, and as height increases, weir body section often rises 1m, weir body breaks to after-contraction
Towards after-contraction 1m, comprehensive slope ratio is 1:1.
Compared with conventional earth rock cofferdam, the utility model can shorten cofferdam completion time of project, cost saving 15% ~ 20%.
Structure feature the foregoing is merely specific embodiment of the utility model, but the utility model is not limited to
This, any those skilled in the art in the field of the utility model, all cover in this practicality newly by the variation or modification made
Among the protection domain of type.
Claims (3)
1. thin section broken line type cofferdam structure, positioned adjacent with coombe or hydraulic tunnel, it is characterised in that：
Cofferdam axis uses broken line type, and axis direction is also walked in addition to intersecting with place streamflow direction in wide-angle with coombe
To or hydraulic tunnel axis it is substantially parallel, washed away to avoid weir body by coombe or hydraulic tunnel mainstream；
The weir phosphor bodies of the underwater placement part of the cofferdam structure use rock ballast material（1）, weir body upstream face is using reinforced gabion
（3）Pile and boulder（4）Bank protection；The cofferdam structure also sets underwater seepage prevention system in weir phosphor bodies（2）；
The upstream face that the weir body is higher by working water level uses reinforced gabion（3）Piling structure erosion control, reinforced gabion rear side fill
Rock ballast material（11）, Transition Materials（5）, bedding material（6）, bedding material（6）Middle setting seepage prevention system（7）；Back side uses rock ballast material
（11）, and and bedding material（6）Between Transition Materials are set（5）；
Reinforced gabion thickness uses 3 ~ 10m, and as height increases, weir body section is to after-contraction.
2. thin section broken line type cofferdam structure as described in claim 1, it is characterised in that：Often rise 1m, weir body section is backward
1m is shunk, comprehensive slope ratio is 1:1.
3. thin section broken line type cofferdam structure as described in claim 1, it is characterised in that：Be respectively provided in two sides the coombe or
Hydraulic tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721442387.1U CN207538055U (en) | 2017-11-02 | 2017-11-02 | A kind of thin section broken line type cofferdam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721442387.1U CN207538055U (en) | 2017-11-02 | 2017-11-02 | A kind of thin section broken line type cofferdam structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207538055U true CN207538055U (en) | 2018-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721442387.1U Active CN207538055U (en) | 2017-11-02 | 2017-11-02 | A kind of thin section broken line type cofferdam structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905242A (en) * | 2017-11-02 | 2018-04-13 | 中国电建集团华东勘测设计研究院有限公司 | A kind of thin section broken line type cofferdam structure and construction method |
| CN109356091A (en) * | 2018-11-21 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Mountain stream river levee engineering |
-
2017
- 2017-11-02 CN CN201721442387.1U patent/CN207538055U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107905242A (en) * | 2017-11-02 | 2018-04-13 | 中国电建集团华东勘测设计研究院有限公司 | A kind of thin section broken line type cofferdam structure and construction method |
| CN109356091A (en) * | 2018-11-21 | 2019-02-19 | 中国电建集团成都勘测设计研究院有限公司 | Mountain stream river levee engineering |
| CN109356091B (en) * | 2018-11-21 | 2024-01-19 | 中国电建集团成都勘测设计研究院有限公司 | Mountain stream river embankment project |
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