膜袋围堰在客专桥梁基础施工中的运用

摘要

杭甬铁路客运专线HYZQ-1标段桥梁地处萧绍平原河网化地区,桥址范围内水塘河流密布,大量的水中墩台制约着施工的进度,设计方案为搭设栈桥平台施工孔桩基础及便桥通过河道,施工需投入大量的措施费用。通过膜袋围堰的运用施工水中桥梁基础,改变了使用栈桥平台投资大,使用草袋围堰施工慢、安全性差等缺点,在保证快速施工、节约成本方面为客专桥梁水中基础施工提供了借鉴。%The bridge of HYZQ-1 section on the Hangzhou-Ningbo Passenger Dedicated Line is located at the river network region of Xiao-Shao plain,which is densely covered with ponds and rivers,large water piers hinders the progress of construction.Trestle platform construction,pile foundation and temporary bridge through the river are adopted in design scheme,which requires great construction investment.By the use of the membrane bag cofferdam in construction of bridge foundation in water,the problems such as big investment,long duration of sward cofferdam,poor safety are solved which provides a good reference for underwater bridge foundation construction in rapid construction and cost-saving.