京津城际铁路延伸线大直径超长钻孔桩施工实例

A Construction Example of the Large Diameter Over-length Drilled Pile in the Extension Project of Beijing-Tianjin Inter-City Railway

根据京津城际铁路延伸线跨津秦铁路特大桥441#墩大直径超长钻孔桩施工中遇到的各种问题,确定大直径超长钻孔桩在不同地质条件、不同施工环境下的施工方法,顺利完成钻孔桩施工,对同类条件下钻孔桩施工有一定的参考价值。

According to various problems appeared in constructing the large diameter over-length drilled pile for the 441# pier of the extra large bridge across Tianjin-Qinhuangdao Railway in the Extension Project of Beijing-Tianjin Inter-City Railway,this paper confirms the construction methods of large diameter over-length drilled piles in different geological conditions and construction environment. Construction of drilled pile can be finished smoothly. And there are a certain referential values for the similar construction of drilled piles.