西江特大桥双壁钢围堰设计及施工计算

Design and Construction Calculation of Double-wall Steel Cofferdam of Xijiang River Bridge

双壁钢围堰作为桥梁深水基础施工一种临时的阻水结构,利用围堰壁板和封底混凝土围水,保证桥梁下部结构施工顺利进行。结合西江特大桥跨西江主桥深水基础工程的实况,从尺寸、构造、材料等方面总结出双壁钢围堰设计及施工计算的基本步骤,可为类似工程提供参考。

Double-wall steel cofferdam is a temporary water blocking structure in the construction of bridge deep water foundation. By using the cofferdam wallboard and the subsealing concrete to stop water from flowing,it could ensure the smooth construction of the bridge substructure. Based on the actual situation of the deep foundation engineering of Xijiang River Bridge,the paper summarized the basic steps of the design and construction calculation of double-wall steel cofferdam from the aspects of size,structure and materials,which could provide a reference for similar projects.