拉森钢板桩围堰在跨海湾大桥水中墩承台施工中的应用

Application of Larssen Steel Sheet Pile Cofferdam to Deep-water Construction of Cross-sea Bridges

采用拉森钢板桩围堰做水中墩承台时,确定钢板桩的强度、刚度和入土深度是保证承台顺利施工的关键。文中以某跨海特大桥水中墩承台围堰为例,介绍了拉森钢板桩围堰的结构形式、内力和入土深度的计算方法,并对拉森钢板桩围堰的工艺流程和施工方法做了较详细的阐述,可为类似工程的施工提供一定的借鉴作用。

Determining the stiffness and strength of steel piles and soil depth is the key point to guarantee the smooth construction of pile caps when using Larssen steel sheet pile cofferdam as pier base in deep water. Taking the pier base cofferdam of a Cross-sea Bridge as an example,this paper introduced the method to calculate the structural internal force as well as the soil depth of Larssen steel sheet pile cofferdam. Some important aspects are described in detail,such as process flows and construction method of Larssen steel sheet pile cofferdam,which can provide reference for similar project construction.