Steel sheet pile cofferdam structure construction method

Abstract

The invention discloses a steel sheet pile cofferdam structure construction method which comprises the steps that (1) an inner side locating steel pipe pile and an outer side locating steel pipe pile are arranged on the inner side and the outer side of a steel sheet pile in a ramming mode, and an upper layer plane locating structure is fixedly arranged on the inner wall of the upper portion of the outer side locating steel pipe pile; (2) a cantilever beam which is connected with a lower layer precast concrete supporting whole system through a hanging rod is arranged on the top of a steel protecting cylinder; (3) an upper layer enclosing purlin is arranged on the inner side locating steel pipe pile, a steel sheet pile is inserted between the upper layer enclosing purlin and the upper layer plane locating structure in a ramming mode, the steel sheet pile is welded with the upper layer enclosing purlin in an inserting mode, and then an upper layer steel inner support is fixedly arranged in the upper layer enclosing purlin; (4) water in the steel sheet pile cofferdam is extracted out, a bracket is welded to support a lower layer precast concrete inner support, then the steel sheet pile and the lower layer enclosing purlin are welded, finally the hanging rod is removed, and the cantilever beam is detached; and (5) bearing platform concrete construction is carried out. The vertical accuracy of the steel sheet plate can be effectively controlled with the method.

Description

technical field [0001] The invention relates to a construction method of a steel sheet pile cofferdam structure. Background technique [0002] With the widespread construction of high-grade highways and railways, there are more and more cross-river and sea-crossing bridge projects. For the construction of underwater caps, the construction technology of using steel sheet pile cofferdams for water isolation has become the focus of attention. When the construction position of the cap is deep, the bottom of the cap is above the mud surface, and the construction formwork of the cap needs to be designed separately, and the position of the construction formwork of the cap often conflicts with the inner support layout of the cofferdam, which increases the difficulty of the design of the steel sheet pile cofferdam. In addition, it is difficult to control the verticality of the steel sheet pile insertion during the construction of the steel sheet pile cofferdam, and the deviation and ...

AI Technical Summary

Problems solved by technology

When the water is deep in the construction position of the cap, and the bottom of the cap is above the mud surface, the construction formwork of the cap needs to be designed separately, and the position of the construction formwork of the cap often conflicts with the layout of the inner support of the cofferdam, which increases the difficulty of the design of the steel sheet pile cofferdam

In addition, it is difficult to control the verticality of the steel sheet pile insertion during the construction of the steel sheet pile cofferdam, and the deviation and inclination of the steel sheet pile insertion often occur when the ordinary single-layer guide technology is used for construction.

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