Construction method of wading open cut foundation pit combined type steel sheet pile cofferdam

Abstract

The invention relates to a construction method of a wading open cut foundation pit combined type steel sheet pile cofferdam. The construction method comprises the following steps that 1), constructionpreparation is conducted; 2), inserting of an inside steel sheet pile and an outside steel sheet pile is conducted; 3), construction of gabion river bottom protection around the piles is conducted; 4), construction of filling of a clay infill is conducted; 5), arrangement of the infill in a bag is conducted; 6), construction of a cast-in-place cover plate is conducted; and 7), and setting of a balance pressure-heavy truck is conducted. The construction method has the beneficial effects that the top ends of the inside steel sheet pile and the outside steel sheet pile are provided with limit roofs, connecting anchor cables are arranged between the limit roofs and a foundation soil body, and the tops of the inside steel sheet pile and the outside steel sheet pile can be limited; and at the same time, an inner support position control rod and an inside wall pressure rod are arranged between the inside steel sheet pile and the outside steel sheet pile, outside wall pressure rods are correspondingly arranged between the inside steel sheet pile and the limit roof, and the outside steel sheet pile and the limit roof, and interior support and exterior support can synchronously be providedfor the inside steel sheet pile and the outside steel sheet pile.

Description

technical field [0001] The invention relates to a construction method for a wading open excavation foundation pit compound steel sheet pile cofferdam, which can reduce the difficulty of controlling the position of steel sheet piles, improve the construction efficiency of the cofferdam gap filling body, and improve the stability and waterproof performance of the cofferdam structure. In the field of pit engineering, it is suitable for wading open excavation foundation pit construction projects. Background technique [0002] When excavating foundation pits in areas significantly affected by surface water, a certain amount of water retaining structures are often required to reduce the impact of surface water on the stability of foundation pits. Cofferdam is a water-retaining structure commonly used in engineering at present. Considering that the steel sheet pile cofferdam structure has the advantages of high construction efficiency, less construction procedures, and recyclabilit...

AI Technical Summary

Problems solved by technology

The steel sheet pile cofferdam structure solves the problem of lateral stability control of the cofferdam structure, but due to the single row of steel sheet piles, it is difficult to seal the water; moreover, this technology does not involve the steel sheet Seepage filling, dynamic control of the stability of the cofferdam structure and other issues, and the solution of these problems is the key to the construction quality, water-proof effect and stability of the steel sheet pile cofferdam

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