鳌江特大桥潮汐深水基础施工技术

鳌江的水位受潮汐影响很大，鳌江特大桥3号墩处于江中心，桩基及承台在水下5～10m深，为确保施工方案安全可行，采用搭设栈桥及钻孔平台先施工桩基，然后利用钻孔平台现场拼装钢套箱沉井下沉到设计标高，水下砼封底后施工承台、墩身。

Construction Technology for Ao River Bridge Deep-water Foundation in Tide

The water level of Ao River is influenced greatly by tide. The 34 pier of Ao River Bridge lies in the center of the river and the pile foundation and beating platform are 5-10 m under water. For the safety and feasibility of the construction scheme, a trestle and drilling platform will be built before the pile foundation, and then the steel box is assembled on the drilling platform, together with its sinking to the design level, in the end the bearing platform and pier will be built after closing the caisson with sub-aqueous concrete.