A method for constructing a foundation adjacent to a deep-cut cliff wall

By constructing islands and installing cofferdams in certain areas during the dry season, the problem of low construction efficiency for bridge foundations in semi-shore, semi-water slate terrain was solved. This approach achieved rapid formation of working surfaces, cost savings, and made full use of the geological advantages of slate.

CN116043832BActive Publication Date: 2026-02-17CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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Patent Information

Application Number
CN202310131079.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-17
Publication Date
2026-02-17
Estimated Expiration
2043-02-17

AI Technical Summary

Technical Problem

In existing technologies, the construction of bridge foundations in semi-shore and semi-water slate terrain is affected by water flow and wind loads, resulting in low construction efficiency and failure to fully utilize the geological advantages of slate.

Method used

During the dry season, the first partial island construction was carried out, a temporary road was set up, and a cofferdam was installed to form a water-blocking structure with the deep cliff. The second full-range island construction was carried out to form a drilling pile working platform, and construction was carried out on the drilling pile working platform.

Benefits of technology

By utilizing construction methods during the dry season, a working surface can be quickly formed, construction costs can be saved, the geological advantages of the smooth slate can be fully utilized, the construction process can be simplified, and construction efficiency can be improved.

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Abstract

The application relates to a construction method of a foundation near a deep-cut cliff, which comprises the following steps: firstly, carrying out local island construction near the deep-cut cliff in the dry season, and setting a convenient path leading to the bottom of the deep-cut cliff; secondly, installing a cofferdam at a cofferdam construction area, so that the cofferdam, the deep-cut cliff and the original riverbed surface jointly form a water-blocking structure; thirdly, carrying out second full-range island construction between the inner side of the cofferdam and the deep-cut cliff, and forming a bored pile working platform; fourthly, carrying out bored pile construction on the bored pile working platform; and finally, carrying out a bearing platform construction. The method makes full use of the advantages of the near shore, introduces the convenient path from the bottom of the deep-cut cliff in the dry season, enters the cofferdam through the convenient path in the later period, changes water construction into pure land construction, greatly saves the construction cost, makes full use of the dry season construction advantage, only needs to carry out local island construction to meet the cofferdam installation condition, and can quickly form an operation surface after the construction access is formed; and the cofferdam and the deep-cut cliff jointly form the water-blocking structure, and the topographic features of the deep-cut cliff are fully utilized.
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