Staged cofferdam design scheme

Through the phased cofferdam design plan, the flow characteristics and river flow of the diversion structure were calculated, and the anti-seepage elevation and top elevation were designed. The cofferdam construction period was extended and safety was improved, which solved the problems of short cofferdam construction period and large equipment investment, and reduced the difficulty of resource organization and construction costs.

CN120683874APending Publication Date: 2025-09-23中国水利水电第七工程局有限公司
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Patent Information

Application Number
CN202510611257.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-13
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

In the existing technology, the cofferdam construction period is short and the equipment investment is large. Once the dry season is missed, it will have a significant impact on the project schedule, and the safety of the cofferdam is difficult to ensure.

Method used

A phased cofferdam design scheme is adopted. By calculating the flow characteristics of the diversion structure and the river flow, the anti-seepage elevation and top elevation of the cofferdam are designed. The cofferdam construction is implemented in phases, including the early construction of the first-phase cofferdam and the combined construction of the second-phase cofferdam, using different anti-seepage bodies and protective measures.

Benefits of technology

It extends the cofferdam construction period, reduces equipment investment, improves the safety of the cofferdam and the reliability of construction, ensures the safety of foundation pit construction, and reduces the difficulty of resource organization and construction costs.

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Abstract

The invention discloses a staged cofferdam design scheme, which is characterized in that on the basis of the overall design of a cofferdam, a first-stage cofferdam design is added, a dry-stage construction is carried out in advance, and the scheme comprises the steps of overall design of the cofferdam, the first-stage cofferdam design, flood protection design of the first-stage cofferdam and closure design. According to the staged cofferdam design scheme, the problems that the construction period of a single dry period of a large-flow river channel cofferdam is short, and the equipment investment is large are solved; and the construction safety of the cofferdam and the flood safety of the first-stage cofferdam can be effectively ensured, so that the safety during the construction period of the foundation pit is effectively ensured. According to the design and construction scheme, cofferdam construction is intervened in advance, and the cofferdam construction period is better guaranteed; cofferdam construction resources are input by stages, so that the resource organization difficulty is reduced; according to the design and construction scheme, filling of the first-stage cofferdam and the second-stage cofferdam and construction resources of the anti-seepage body can be repeatedly used, resource investment is saved, and then the construction cost is saved.
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Citation Information

Patent Citations

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    CN112900353A

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