Design and Construction of Steel Boxed Cofferdams for Xiangshan Port Sea-Crossing Bridge of Ningbo-Xiangshan Suburban Railway with Steel Pipe Driven Pile Foundation
The total length of Xiangshan Port Sea-Crossing Bridge of Ningbo-Xiangshan Urban(Suburban)Railway is 8.276 km,which is the first sea-crossing bridge of urban(suburban)railway in China.The foundation of the non-navigable hole approach bridge in the deep water area of the bridge adopts the steel pipe driven pile and the inclined pile design,with a high pile cap used as the pile cap.The overall structure of the cap steel suspension box cofferdam includes four parts:side wall system,bottom plate system,inner beam support hoisting system and inner longitudinal beam suspension system.The construction scheme of factory processing and manufacturing,overall assembly,offshore barge transportation,and overall lifting of floating crane is adopted.The steel boxed cofferdam has the advantages of simple stress structure,strong structural integrity,less material input,high turnover utilization rate,fast decentralization and positioning speed,short overall construction period and high safety.It lays a solid step for the successful penetration of Xiangshan Port Sea-Crossing Bridge of Ningxiang Urban(Suburban)Railway.
steel pipe driven pilepile capsteel boxed cofferdamdesign and construction
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