CN213390185U - Cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together - Google Patents
Cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together Download PDFInfo
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- CN213390185U CN213390185U CN202021271034.1U CN202021271034U CN213390185U CN 213390185 U CN213390185 U CN 213390185U CN 202021271034 U CN202021271034 U CN 202021271034U CN 213390185 U CN213390185 U CN 213390185U
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Abstract
The utility model provides a cofferdam structure combining an earth-rock cofferdam and a concrete cofferdam, wherein the upper part is the concrete cofferdam, the lower part is the cofferdam structure of the earth-rock cofferdam, the weir body of the earth-rock cofferdam is provided with a structural cast-in-place pile and a cut-off wall, the structural cast-in-place pile and the cut-off wall are upwards embedded into the bottom of the concrete cofferdam to a certain depth, the interior of the weir body of the upstream face of the earth-rock cofferdam is downwards communicated with an anti-impact cast-in-place pile, and; the utility model discloses the lower part is the earth-rock cofferdam, and upper portion is the concrete cofferdam, reduces riverbed area occupied, and construction period is short, and the engineering volume is little, invests in for a short time.
Description
Technical Field
The utility model relates to a hydraulic and hydroelectric engineering technical field, concretely relates to cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together.
Background
Construction diversion is a key technology of water conservancy and hydropower engineering construction, wherein staged diversion is a commonly used construction diversion mode in a wide riverbed, and for a large-flow and high-flow-speed riverway, staged diversion usually requires newly-built longitudinal concrete cofferdams.
However, the existing scheme has the following problems: 1. the construction of the longitudinal concrete cofferdam requires the construction of an earth-rock cofferdam, the earth-rock cofferdam occupies a large area of a riverbed, and the riverbed is narrow and large; 2. the construction process of the scheme comprises sub-cofferdam earth-rock filling, seepage-proofing construction, sub-cofferdam foundation pit pumping, longitudinal concrete cofferdam foundation excavation and concrete pouring, and the construction period of the construction process is long, the engineering quantity is large, and the investment is large.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together, the utility model discloses the lower part is the earth-rock cofferdam, and upper portion is the concrete cofferdam, reduces riverbed area occupied, and construction period is short, and the engineering volume is little, invests in for a short time.
Therefore, the utility model adopts the following technical scheme:
the utility model provides a cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together which characterized in that: the upper portion is the cofferdam structure of concrete cofferdam, the lower part is the earth and rockfill cofferdam, the earth and rockfill cofferdam weir body sets up the cut-off wall and sets up the structure bored concrete pile in the low reaches of cut-off wall, structure bored concrete pile and cut-off wall embedding concrete cofferdam bottom certain degree of depth, the internal downward link up of weir of the face water side of earth and rockfill cofferdam sets up anti-scouring bored concrete pile, anti-scouring bored concrete pile top connection apron.
Further: the bottom of the earth-rock cofferdam is arranged on the covering layer, and the structural cast-in-place pile and the impervious wall penetrate through the covering layer and are embedded into the bedrock.
Further: the anti-impact cast-in-place pile penetrates through the covering layer and is embedded into the bedrock.
Further: and an anti-impact protective layer is arranged on the upstream face of the earth-rock cofferdam.
Further: the anti-impact protective layer can be selected from a steel reinforcement gabion, a concrete panel or a boulder.
Further: the earth-rock cofferdam is built so that the top of the earth-rock cofferdam can be used as a construction platform.
Further: and a plurality of structural cast-in-place piles and anti-impact cast-in-place piles are arranged in the earth-rock cofferdam body along the width direction.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model is a cofferdam structure of a lower earth-rock cofferdam and an upper concrete cofferdam, which reduces the occupied area of a riverbed, and has short construction period, small work amount and small investment; further, because the velocity of flow is often great during the water conservancy diversion, the utility model discloses a solve rivers and erode, draw the problem of brushing the destruction, set up anti-impact protective layer at the embankment cofferdam upstream face to protection weir integument rivers are destroyed.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
The labels in the figures are: 1-concrete cofferdam; 2-an earth-rock cofferdam; 3-structural cast-in-place piles; 4-a diaphragm wall; 5-impact-resistant cast-in-place pile; 6-impact protection layer; 7-cover plate.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
As shown in fig. 1, the utility model provides a pair of cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together, upper portion is concrete cofferdam 1, the lower part is the cofferdam structure of earth-rock cofferdam 2, earth-rock cofferdam 2 is that earth-rock is filled and is formed, 2 weir bodies of earth-rock cofferdam set up structure bored concrete pile 3 and cut-off wall 4, structure bored concrete pile 3 and the certain degree of depth in 4 embedding concrete cofferdams 2 bottoms of cut-off wall, the weir body of 2 sides of meeting water of earth-rock cofferdam is inwards link up and is set up anti-impact bored concrete pile 5, concrete apron 7 is connected at 5 tops of anti-impact bored concrete pile.
The bottom of the earth-rock cofferdam 2 is arranged on the covering layer, and the structural cast-in-place pile 3 and the impervious wall 4 penetrate through the covering layer and are embedded into bedrock. The impact-resistant cast-in-place pile 5 penetrates the overburden and is embedded in the bedrock face.
And an anti-impact protective layer 6 is arranged on the upstream surface of the earth-rock cofferdam 2.
The anti-impact protection layer 6 can be selected from a steel reinforcement gabion, a concrete panel or a boulder.
A plurality of structural cast-in-place piles 3 and anti-impact cast-in-place piles 5 are arranged in the weir body of the earth rock cofferdam 2, and the structural cast-in-place piles 3 and the anti-impact cast-in-place piles 5 are arranged along the width direction of the earth rock cofferdam 2.
The construction method of the cofferdam structure combining the earth-rock cofferdam and the concrete cofferdam comprises the following steps:
forming an earth-rock cofferdam 2 by filling earth and rock above the covering layer; constructing a structural cast-in-place pile 3, an impervious wall 4 and an impact-resistant cast-in-place pile 5 by taking the top of the earth-rock cofferdam 2 as a construction platform; constructing a concrete cofferdam 1 at the top of the earth-rock cofferdam 2, and connecting a structural cast-in-place pile 3 and an impervious wall 4 at the bottom of the concrete cofferdam 1; and laying a cover plate 7 on the top of the anti-impact filling pile 5, and laying an anti-impact protective layer 6 on the upstream face of the earth-rock cofferdam 2.
The above embodiments are merely preferred technical solutions of the present invention, and it should be understood by those skilled in the art that modifications or substitutions of technical solutions or parameters in the embodiments can be made without departing from the principles and essential conditions of the present invention, and all the modifications or substitutions should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together which characterized in that: the upper portion is the cofferdam structure of concrete cofferdam, the lower part is the earth and rockfill cofferdam, the earth and rockfill cofferdam weir body sets up the cut-off wall and sets up the structure bored concrete pile in the low reaches of cut-off wall, structure bored concrete pile and cut-off wall embedding concrete cofferdam bottom certain degree of depth, the internal downward link up of weir of the face water side of earth and rockfill cofferdam sets up anti-scouring bored concrete pile, anti-scouring bored concrete pile top connection apron.
2. The cofferdam structure of combination of earth-rock cofferdam and concrete cofferdam as recited in claim 1, characterized in that: the bottom of the earth-rock cofferdam is arranged on the covering layer, and the structural cast-in-place pile and the impervious wall penetrate through the covering layer and are embedded into the bedrock.
3. The cofferdam structure of combination of earth-rock cofferdam and concrete cofferdam as recited in claim 1, characterized in that: the anti-impact cast-in-place pile penetrates through the covering layer and is embedded into the bedrock.
4. The cofferdam structure of combination of earth-rock cofferdam and concrete cofferdam as recited in claim 1, characterized in that: and an anti-impact protective layer is arranged on the upstream face of the earth-rock cofferdam.
5. The cofferdam structure of combination of earth-rock cofferdam and concrete cofferdam as recited in claim 4, characterized in that: the anti-impact protective layer adopts a steel bar gabion, a concrete panel or a large stone.
6. The cofferdam structure of combination of earth-rock cofferdam and concrete cofferdam as recited in claim 1, characterized in that: the earth-rock cofferdam is built so that the top of the earth-rock cofferdam can be used as a construction platform.
7. The cofferdam structure of combination of earth-rock cofferdam and concrete cofferdam as recited in claim 1, characterized in that: and a plurality of structural cast-in-place piles and anti-impact cast-in-place piles are arranged in the earth-rock cofferdam body along the width direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021271034.1U CN213390185U (en) | 2020-07-01 | 2020-07-01 | Cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021271034.1U CN213390185U (en) | 2020-07-01 | 2020-07-01 | Cofferdam structure that earth-rock cofferdam and concrete cofferdam combined together |
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| CN213390185U true CN213390185U (en) | 2021-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718817A (en) * | 2021-08-05 | 2021-11-30 | 中国电建集团北京勘测设计研究院有限公司 | Construction method for treating dam foundation of staged diversion hydropower engineering |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113718817A (en) * | 2021-08-05 | 2021-11-30 | 中国电建集团北京勘测设计研究院有限公司 | Construction method for treating dam foundation of staged diversion hydropower engineering |
| CN113718817B (en) * | 2021-08-05 | 2023-01-24 | 中国电建集团北京勘测设计研究院有限公司 | Construction method for treating dam foundation of staged diversion hydropower engineering |
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