Cofferdam construction method combining film bag sand filling with steel sheet pile

Abstract

The invention discloses a cofferdam construction method combining film bag sand filling with a steel sheet pile. The cofferdam construction method comprises the steps of measurement and alignment, film bag positioning and laying, layer-by-layer film bag sand filling, muddy water discharging to enable a film bag sand cofferdam to precipitate, blow filling of closed sand between two layers of film bag sand, water pumping and drainage in a cofferdam foundation pit, steel sheet pile anti-seepage core wall construction and the like. According to the construction method, the film bag sand filling is combined with the steel sheet pile anti-seepage full-section cofferdam, the upper portion of the cofferdam is piled up with the film bag wrapped with sand soil, the lower portion of the cofferdam is anti-seepage through the steel sheet piles, the whole cofferdam becomes a whole, so that the cofferdam is high in integrity, good in self stability, high in adaptability to foundation, high in water pressure resistance and good in anti-seepage effect. The problem that the construction cofferdam is constructed under complex underwater geological conditions can be basically and effectively solved, the overall stability of a cofferdam structure is improved, and the cofferdam construction method has the advantages of being simple in process, fast in construction progress, low in cost and the like and has wide application prospects in the field of cofferdam construction of water conservancy projects.

Description

Technical field [0001] The present invention relates to the field of water conservancy construction techniques, in particular a membrane bag sand sand-binding steel sheet pile cofferdam construction method. Background technique [0002] At present, the conventional cofferdam method has soone, steel plate pile cofferdam, wooden camfall, reinforced concrete slate, etc. Among them, the earth-rock cofferdam is a cofferdam made from earth and stone is the most widely used cofferdam in my country. However, there is a low anti-brush capability of earth and stone, and the area is large, and the foundation requirements are higher, generally used in horizontal cofferdam. The concrete cofferdam is characterized by high water grid head, small bottom width, large impact capacity, and top overflow of the top, but the concrete cofferdam cost is high. When using a steel plate pile cofferdam, the tilt terrain of the river bed causes the steel sheet pile to increase the side pressure, which is not...

AI Technical Summary

Problems solved by technology

This construction method has strong integrity, good self-stability, strong adaptability to the foundation, strong water pressure resistance, and good anti-seepage effect. The overall stability of the cofferdam structure, and it also has the advantages of simple process, fast construction progress and low cost, and has broad application prospects in the field of water conservancy construction cofferdams

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