浅谈繁忙航道大直径桩基钢护筒沉放施工工艺

Discussion on Construction Technology of Steel Cylinder Sinking for Large Diameter Pile Foundation in Busy Channel

肇庆西江大桥防撞工程是西江(界首至肇庆)航道扩能升级工程桥梁防撞处理工程之一,其航道非常繁忙,水深且急,防撞墩桩基钢护筒定位难度较大,施工环境危险。本文分析了在封航条件下,搭设水上施工平台,采用导向架精准定位大直径桩基钢护筒沉放施工工艺,为今后类似桥梁防撞处理工程提供了有价值的参考资料。

Zhaoqing Xijiang Bridge Collision Avoidance Project is one of the bridge anti-collision treatment projects for the expansion project of the Xijiang （Jieshou-Zhaoqing） channel. The channel is very busy, the water is deep and urgent, the collapsible pier pile foundation steel casing is difficult to locate and the construction environment is dangerous. This paper analyzes the construction of a water-construction platform under the conditions of sealing and adopts a guide frame to accurately locate the construction technology of large-diameter piled steel sheathed steel caisson, providing valuable reference materials for similar bridge anti-collision engineering in the future.