CN218508368U - Cofferdam structure - Google Patents
Cofferdam structure Download PDFInfo
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- CN218508368U CN218508368U CN202222229540.XU CN202222229540U CN218508368U CN 218508368 U CN218508368 U CN 218508368U CN 202222229540 U CN202222229540 U CN 202222229540U CN 218508368 U CN218508368 U CN 218508368U
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Abstract
The utility model provides a cofferdam structure, include: the earth-rock cofferdam is arranged at the lower part of the cofferdam structure and is arranged on the covering layer; the clay core wall is arranged at the bottom of the earth-rock cofferdam and penetrates through the covering layer; the steel plate pile cofferdam is arranged at the upper part of the cofferdam structure and penetrates through the earth and rock cofferdam, the bottom of the steel plate pile cofferdam is embedded into the clay core wall, and the steel plate pile cofferdam is higher than the vertical part of the earth and rock cofferdam, so that the technical problems of large riverbed area occupied by the earth and rock cofferdam, large earth material demand and long construction period in the prior art are solved.
Description
Technical Field
The utility model belongs to the technical field of the water conservancy water and electricity technique and specifically relates to a cofferdam structure is related to.
Background
Construction diversion is a key technology of water conservancy and hydropower engineering construction, wherein staged diversion is used as a common construction diversion mode. For reservoir engineering or linear embankment engineering of a high-flow and high-water-level river channel, the earth-rock cofferdam can be selected for stage diversion so as to reduce the cost. However, the existing scheme has the following problems: 1. the longitudinal earth-rock cofferdam occupies a large area of a riverbed, and the narrow riverbed is large; 2. the demand for earth and stone filling materials and anti-seepage clay is large, and special earth material yards are required to be configured for part of projects; 3. the earth-rock cofferdam has large project amount and long construction period.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a cofferdam structure to solve the technical problem that the earth and rock cofferdam that exists among the prior art accounts for riverbed area big, the soil material demand is big, construction period is long.
The utility model provides a pair of cofferdam structure, include: the earth-rock cofferdam is arranged at the lower part of the cofferdam structure and is arranged on the covering layer; the clay core wall is arranged at the bottom of the earth-rock cofferdam and penetrates through the covering layer; the steel plate pile cofferdam is arranged at the upper part of the cofferdam structure and penetrates through the earth rock cofferdam, the bottom of the steel plate pile cofferdam is embedded into the clay core wall, and the steel plate pile cofferdam is higher than the vertical part of the earth rock cofferdam.
Furthermore, the height of the earth-rock cofferdam is matched with the non-flood season water level.
Furthermore, the steel sheet pile cofferdam is a double-layer steel sheet pile cofferdam and comprises a water-facing side steel sheet pile and a water-backing side steel sheet pile.
Furthermore, the height of the steel sheet pile on the backwater side is smaller than that of the steel sheet pile on the water-facing side, and the bottom of the steel sheet pile on the backwater side is arranged in the earth-rock cofferdam.
Furthermore, soil and stone materials are filled in the double-layer steel sheet pile cofferdam and are used as a construction road.
Furthermore, the steel sheet pile on the water-facing side and the steel sheet pile on the backwater side are fixedly connected through a counter-pulling screw, the steel sheet pile on the backwater side is provided with an inclined strut, and the other end of the inclined strut is inserted into the depth of the earth-rock cofferdam and is greater than one meter.
Furthermore, the top of the earth-rock cofferdam is filled as a construction platform.
Furthermore, the upstream face of the earth-rock cofferdam is provided with an anti-impact protective layer.
Furthermore, the anti-impact protective layer adopts a steel reinforcement gabion, a concrete panel or bagged soil.
The utility model provides a pair of cofferdam structure adopts steel sheet pile and earth-rock cofferdam to combine together, and the high and non-flood season water level of earth-rock cofferdam matches, has reduced the construction height of earth-rock cofferdam to reduce riverbed area occupied, reduce the native building stones engineering volume, solved the technical problem that the earth-rock cofferdam that exists among the prior art accounts for riverbed area big, the soil material demand is big, construction period is long.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is the cofferdam structure sketch map that the embodiment of the utility model discloses double-deck steel sheet pile cofferdam and earth-rock cofferdam combined together.
Icon: 1-steel sheet pile on the water-facing side; 2-an earth-rock cofferdam; 3-clay core wall; 4-soil stones; 5-an impact-resistant protective layer; 6-steel sheet piles on the waterline side; 7-channel steel; 8-oppositely pulling the screw rod; 9-inclined strut.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
According to the cofferdam structure provided by the embodiment, the lower part of the cofferdam structure is the earth-rock cofferdam 2, and the upper part of the cofferdam structure is the steel sheet pile cofferdam. Wherein the bottom of the earth-rock cofferdam 2 is arranged on the covering layer. The bottom of the weir body of the earth rock cofferdam 2 is provided with a clay core wall 3 for seepage prevention, and the clay core wall 3 needs to pass through the covering layer. The bottom of the steel sheet pile cofferdam 1 is embedded into the clay core wall 3 for a certain depth. The top of the earth-rock cofferdam 2 is filled as a construction platform. The height of the earth-rock cofferdam 2 is matched with the water level in the non-flood season and is used for retaining water in the non-flood season. The top of the steel sheet pile cofferdam is higher than the vertical part of the earth-rock cofferdam 2 by a certain height and is used for retaining water in flood season. The top height of the steel sheet pile cofferdam is matched with the flood season water level, so that the construction height of the earth-rock cofferdam 2 is reduced, the construction period is shortened, the earth material requirement is reduced, and the river bed occupied area is reduced.
Optionally, the steel sheet pile cofferdam is double-deck steel sheet pile cofferdam, can be used to strengthen the steadiness of steel sheet pile cofferdam structure. The double-layer steel sheet pile cofferdam comprises a water-facing side steel sheet pile 1 arranged on the water-facing side and a backwater side steel sheet pile 6 arranged on the backwater side. The height of the steel sheet pile 6 on the backwater side can be slightly smaller than that of the steel sheet pile 1 on the water side, the bottom of the steel sheet pile 1 on the water side is inserted into the clay core wall 3, and the bottom of the steel sheet pile 6 on the backwater side is inserted into the earth-rock cofferdam, so that the construction difficulty of the steel sheet pile 6 on the backwater side can be reduced. Soil and stone materials 4 are backfilled in the double-layer steel sheet pile cofferdam, and the top of the soil and stone materials 4 can be used as a construction road. In double-deck steel sheet pile cofferdam, water-facing side steel sheet pile 1 and dorsal scale steel sheet pile 6 are through drawing screw rod 8 fixed connection, are equipped with channel-section steel 7 on water-facing side steel sheet pile 1 and the dorsal scale steel sheet pile 6 for fixed drawing screw rod 8. The back water side of the steel sheet pile at the back water side is fixed with an I-shaped steel inclined strut 9, the other end of the inclined strut 9 is inserted into the earth-rock cofferdam 2, and the insertion depth is not less than 1m. And an impact-resistant protective layer 5 is arranged on the upstream surface of the earth-rock cofferdam 2. The anti-impact protection layer 5 can be formed by a reinforced gabion, a concrete panel or a bagged soil slope protection.
During the non-flood season, the construction of the earth-rock cofferdam 2 can be rapidly completed by reducing the height of the earth-rock cofferdam 2, and the earth-rock cofferdam can be used for retaining water during construction. And before the flood season, completing the construction of the upper steel sheet pile cofferdam, so that the top height of the steel sheet pile cofferdam is higher than the water level of the flood season. And in the flood season, water is retained by a cofferdam structure formed by combining the steel sheet pile cofferdam and the earth-rock cofferdam 2. And after the flood season, removing the upper steel sheet pile cofferdam.
The construction steps of the cofferdam structure combined by the double-layer steel sheet pile cofferdam and the earth-rock cofferdam 2 are as follows:
s1, cleaning a surface covering layer, and excavating and filling a clay core wall 3.
And S2, filling earth and stones above the covering layer and the clay core wall 3 to form an earth and stone cofferdam 2.
And S3, paving an anti-impact protective layer 5 on the upstream face of the earth-rock cofferdam 2, and carrying out steel plate pile cofferdam construction by taking the top of the earth-rock cofferdam 2 as a construction platform.
And S4, implementing soil and stone material 4 filling in the double-layer steel sheet pile cofferdam.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (9)
1. A cofferdam structure, characterized in that it comprises:
-an earth-rock cofferdam (2) arranged in the lower part of the cofferdam structure on the overburden;
-a clay core (3) placed at the bottom of the earth-rock cofferdam (2) passing through the overburden;
-a steel sheet piling cofferdam, placed in the upper part of the cofferdam structure, passing through the earth rock cofferdam (2), the bottom of which is embedded in the clay core wall (3), the steel sheet piling cofferdam being higher than the vertical part of the earth rock cofferdam (2).
2. Cofferdam structure according to claim 1, characterized in that the height of said earth-rock cofferdam (2) matches the flood season water level.
3. Cofferdam structure according to claim 1, characterized in that said steel sheet pile cofferdam is a double layer steel sheet pile cofferdam comprising steel sheet piles (1) on the water-facing side and steel sheet piles (6) on the water-backing side.
4. Cofferdam structure according to claim 3, characterized in that the height of said steel sheet piles (6) at the lee side is less than that of said steel sheet piles (1) at the head side, and the bottom of said steel sheet piles (6) at the lee side is placed in said earth-rock cofferdam (2).
5. Cofferdam structure according to claim 3, wherein said double-deck steel sheet pile cofferdam is filled with earth and stone materials (4) for construction road.
6. The cofferdam structure of claim 3, wherein said steel sheet piles (1) on the water-facing side and (6) on the water-backing side are connected and fixed by tie screws (8), said steel sheet piles (6) on the water-backing side are provided with diagonal braces (9), and the depth of the other end of said diagonal brace inserted into said earth-rock cofferdam (2) is more than one meter.
7. Cofferdam structure according to claim 1, characterized in that the top of said earth-rock cofferdam (2) is filled as a construction platform.
8. Cofferdam structure according to claim 1, characterized in that the water facing side of the earth-rock cofferdam (2) is provided with an impact protection layer (5).
9. Cofferdam structure according to claim 8, characterized in that said impact protection layer (5) is made of reinforcement gabions, concrete panels or bagged soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222229540.XU CN218508368U (en) | 2022-08-23 | 2022-08-23 | Cofferdam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222229540.XU CN218508368U (en) | 2022-08-23 | 2022-08-23 | Cofferdam structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218508368U true CN218508368U (en) | 2023-02-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222229540.XU Active CN218508368U (en) | 2022-08-23 | 2022-08-23 | Cofferdam structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218508368U (en) |
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2022
- 2022-08-23 CN CN202222229540.XU patent/CN218508368U/en active Active
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