潮汐条件下双壁钢围堰施工技术研究

Construction Technology of Double Wall Steel Cofferdam Under Tidal Conditions

潮汐条件下,河流水位变化大,流速快,对河床的冲刷较强,钢围堰下沉阻力大,施工条件复杂,下沉时易发生偏斜。结合浙江省乐清湾港区瓯江特大桥17#主墩钢围堰施工实例,探讨了潮汐条件下钢围堰的结构设计与施工工艺,并对施工过程中需要注意的事项进行了分析,确保了该墩顺利下沉到位,取得了较好的施工效果。

Under tidal conditions,the river water level changes greatly,the flow velocity is fast,and the scouring effect on the riverbed is strong,it result in large sinking resistance to the steel cofferdam,so the deflection is easy to occur when sinking.According to the construction of No.17 main pier steel cofferdam of Oujiang bridge in Leqing bay port area,Zhejiang province,the structural design and construction technology of the steel cofferdam under tidal conditions were discussed,and the matters needing attention during construction were analyzed to ensure the pier was successfully sunk in place and achieved good construction results.