A new construction method of steel hanging box cofferdam based on Larsen steel sheet piles

Abstract

The present invention relates to a new type of steel hanging box cofferdam construction method based on Larsen steel sheet piles, which is characterized in that: the specific construction process is as follows: S1: construction preparation; S2: bottom plate system assembly; S3 suspension system installation; S4: side plate System assembly; S5: installation of internal support system; S6: installation of lowering guide device; S7 lowering of steel hanging box cofferdam; S8: bottom sealing of steel hanging box cofferdam; Larsen steel sheet pile structure is used as steel hanging box cofferdam The side module structure of this structure has high strength, light weight, and good water-tightness; easy assembly and disassembly; high turnover, low cost, strong applicability to deep water and many internal supports, ensuring sufficient strength requirements In addition, pouring a concrete structure on the base plate module has the advantage of low economic cost compared with the base plate of the steel structure, and the steel structure of the present invention is easy to process and assemble; the construction efficiency is high, the cycle is short; the applicability is strong, Hole opening is easy.

Description

technical field [0001] The invention relates to the technical field of construction of steel hanging box cofferdams, in particular to a novel steel hanging box cofferdam construction method based on Larsen steel sheet piles. Background technique [0002] The steel hanging box cofferdam is the leading structure for the construction of high pile caps of bridges. Through the back-sealing concrete surrounding water on the side plates and bottom plates of the steel hanging box cofferdams, it provides a good construction environment for the construction of the caps. It has complex structures, high rigidity, High construction precision; Generally, there are single-wall and double-wall; the advantage of double-wall is that the wall plate has high rigidity, good water-stop performance, and internal support can be canceled or reduced; it has strong applicability to deep water; the disadvantage is that the double-wall steel crane The shortcomings of box cofferdam materials such as larg...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a new type of steel hanging box cofferdam construction method based on Larsen steel sheet piles, which solves the problems of large amount of materials used in the general steel hanging box cofferdam structure, high processing difficulty, cumbersome assembly process, and welding seam requirements. The disadvantages of high quality and heavy workload, and the difficulty of dismantling the underwater part restrict the construction progress, delay the construction period, and at the same time, the problem of huge construction costs

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