Construction method of marine self-floating type steel soleplate single-wall suspension box cofferdam and single-wall suspension box cofferdam

Abstract

The invention discloses a construction method of a marine self-floating type steel soleplate single-wall suspension box cofferdam and a single-wall suspension box cofferdam, wherein the construction method comprises the following steps of: firstly installing a soleplate suspended shoulder pole girder and lowered guiding device of the cofferdam, then installing a steel soleplate, a lateral plate and an inner support, then carrying out the construction of lowering, fixing and bottom sealing by concrete of the cofferdam and finally carrying out the construction of a bearing platform. The cofferdam can be repeatedly used after being dismantled. The marine self-floating type steel soleplate single-wall suspension box cofferdam comprises the steel soleplate, the lateral plate, the inner support and the soleplate suspended shoulder pole girder and lowered guiding device. The steel soleplate of the invention is of a self-floating type assembled structure, an inner inclined strut of the cofferdam is utilized as a distributing girder suspended on the cofferdam when in the construction of bottom sealing by concrete, the lateral plate adopts a massive integral design, and meanwhile, an inner guide girder and the lateral plate are combined into a whole, thereby improving the integral rigidity of the lateral plate and also reducing the assembled working procedures of the cofferdam. The invention has the advantages of effective acceleration of construction schedule, simple and convenient construction operation, high repeated use ratio, safety, reliability and less cost investment.

Description

technical field [0001] The invention relates to a bridge construction method, in particular to a construction method for a single-wall suspension box cofferdam of a self-floating steel floor on the sea and a single-wall suspension box cofferdam. Background technique [0002] With the rapid development of my country's economy, the construction of transportation infrastructure has also been developed rapidly. At the same time, the number of bridges built on the rivers and lakes of our country has also increased. As everyone knows, building a bridge at first will build bridge piers in water, and building bridge piers will adopt cofferdams in water to drain the water therein before construction. [0003] As a temporary facility for bridge foundation construction, the cofferdam is mainly used as a waterproof device for foundation construction in water or as a protective support for excavation of deep foundation pits, so as to carry out binding steel bars, formwork installation an...

AI Technical Summary

Problems solved by technology

[0004] When the geological conditions are not complicated, usually steel sheet pile cofferdams, double-wall steel cofferdams or conventional single-wall steel cofferdams are mainly used for construction. After drying, the cofferdam operation will be carried out, and there will be tides every day, and the wind and waves will be very strong when the weather is bad, so the construction is very difficult

Due to the large number of high pile caps of offshore bridges, if double-wall steel hanging box cofferdams and conventional single-wall steel hanging box cofferdams are used for construction, the cofferdam floor cannot be reused, and a large amount of cofferdam floor needs to be invested, which increases the cost input. In addition, steel sheet pile cofferdam, double-wall steel hanging box cofferdam and conventional single-wall hanging box are used for construction, and the construction period is long, which is not conducive to speeding up the construction progress

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