Abstract

Deep water foundation is constructed by cofferdam in bridge engineering. Safety, quality, cost, and duration of bridge construction depend on the reasonable and feasible deep water cap cofferdam design and construction scheme. “Pile first, cofferdam back” construction program of double-wall steel cofferdam for deep water cap is applied in second SongHua river bridge. The results show that structural stiffness of steel cofferdam, strength of each component both meet work requirements under the most unfavorable conditions in the life-span of the construction process. This scheme effectively solves the technical difficulties in cofferdam construction and improve the working environment of installation and subsidence process. The project is going on well and the duration of construction time is reduced. This technique serve as a helpful reference to similar engineering.

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