Steel sheet pile cofferdam construction process

Abstract

The invention discloses a steel sheet pile cofferdam construction process. The steel sheet pile cofferdam construction process comprises the steps of preparation before construction, guide pile driving construction, steel sheet pile inserting and driving construction, steel sheet pile folding construction, inner support installation, seepage-proofing and leakage-stopping treatment and bottom sealing concrete. The steel sheet pile cofferdam construction process has the beneficial effects that the side pressure of a soil body in a cofferdam to steel sheet piles is reduced through the steel sheet pile cofferdam mode, the pile length is properly decreased, and compared with a traditional cofferdam structure, the steel sheet pile consumption is greatly reduced; due to the fact that the steel sheet piles are located on the water side of the cofferdam, overwater driving and pulling are convenient, the construction difficulty of cofferdam engineering is effectively lowered, the cofferdam construction quality is improved, the construction progress is accelerated, and the construction period is shortened; and the steel sheet piles have a good seepage-proofing effect and good anti-scouring performance, compared with a traditional earth-rock cofferdam, the cofferdam upstream face protection and seepage-proofing workload can be greatly reduced, and the steel sheet pile cofferdam structure has better adaptability and feasibility.

Description

technical field [0001] The invention relates to a steel sheet pile cofferdam, in particular to a steel sheet pile cofferdam construction process, which belongs to the technical field of building construction. Background technique [0002] For water conservancy and hydropower projects, water transport and port projects, municipal engineering and civil construction projects built near the water, construction cofferdams for retaining water must be installed before construction to form foundation pits for dry land construction. Currently commonly used cofferdam structures include earth-rock cofferdam structure, bagged soil cofferdam structure, bagged sand cofferdam structure and double-row steel sheet pile frame cofferdam structure. The existing bagged sand cofferdam structure mainly has the following disadvantages: the section of the cofferdam is large, which occupies the river channel and affects the discharge; the underwater fill cannot be compacted, and the reliability is lo...

AI Technical Summary

Problems solved by technology

The existing bagged sand cofferdam structure mainly has the following disadvantages: the section of the cofferdam is large, which occupies the river channel and affects the discharge; the underwater fill cannot be compacted, and the reliability is low; Difference

The steel sheet pile cofferdam structure, compared with the bagged sand cofferdam structure, has a smaller cofferdam section, and has better anti-seepage effect and anti-scouring performance, but the conventional steel sheet pile cofferdam structure is double-row continuous arrangement, the steel plate The amount of piles is large; the steel sheet piles need to be equipped with steel tie rods, and the steel tie rods generally need to be pulled manually on board, which is difficult to construct

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