Construction method of deep water high pile bearing platform steel hanging box cofferdam

Abstract

The invention discloses a construction method of a deep water high pile bearing platform steel hanging box cofferdam. The construction method comprises the following steps: 1) design of a steel hanging box cofferdam: Larson steel plate piles are adopted as wall plates of the steel hanging box cofferdam; 2) assembly and placement of the steel hanging box cofferdam: the steel hanging box cofferdam adopts high assembly and overall placement technologies; 3) bottom cover concrete construction: a bottom cover construction process is performed twice; after primary bottom covering, water in the steelhanging box cofferdam is extracted to a bottom cover surface; and then, the secondary bottom cover concrete casting is performed; and 4) disassembly of the steel hanging box cofferdam: after a bearing platform and part of underwater piers are constructed, the water is injected in the steel hanging box cofferdam to reach balanced inner and outer water levels; and the steel hanging box cofferdam isdisassembled. In the construction method, through the Larson steel plate piles as the wall plates of the steel hanging box cofferdam and twice bottom cover construction process, the construction progress can be accelerated, the economical cost is saved, and the engineering quality is guaranteed.

Description

technical field [0001] The invention relates to the technical field of deep-water bridge engineering construction, in particular to a construction method for a deep-water high pile cap steel hanging box cofferdam. Background technique [0002] At present, in the foundation construction of long-span deep-water bridges, the steel hanging box cofferdam construction technology has been widely used. The water-free construction is provided for the construction of high pile caps through the back-sealing concrete surrounding water on the side plates and bottom plates of steel hanging boxes. environment. Existing steel hanging boxes are generally divided into two structures: single-wall steel hanging boxes and double-wall steel hanging boxes. Among them, double-wall steel hanging boxes are suitable for deep water areas, and double-wall steel hanging boxes use double-walled steel hanging boxes as steel hanging boxes. There are multiple layers of horizontal trusses between the side pa...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: aim at the construction of deep-water high-pile cap cofferdam by using double-wall steel suspension boxes, because the side panels of the double-wall steel suspension box cofferdam adopt a double-side wall panel truss structure, and its structure is self-heavy and difficult to lower Large size, difficult underwater demolition, long construction period, thick bottom concrete and other shortcomings are difficult to meet the construction period and economic cost requirements. A construction method for deep-water high-pile cap steel suspension box cofferdam is provided. This construction method adopts Larsen Steel sheet piles are used as steel hanging box cofferdam wall panels and secondary back-sealing construction technology, which can speed up the construction progress, save economic costs, and ensure project quality

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