湖口大桥副孔桩基施工中几个技术难点的处理

Processing of Several Technical Problems in Construction of Sub-span Pile Foundation of Hukou Bridge

湖口大桥副孔桩基施工中遇到了工勘遗留物、溶洞、裂隙漏浆等一系列技术难题。对工勘遗留物采用“直接冲砸、环箍检查”方法进行处理;对溶洞采用“补水、回填、堵漏”的方法处理;对特大型溶洞采用“套筒隔离上部松软地层”的方法进行处理;对裂隙漏浆采用”补水、投泥球、堵漏”方法处理。实践证明上述处理方法是行之有效的,可供处理同类问题时参考。

Some technical problems occurred in constructing the pile foumdation of sub\|span of Hukou Bridge,such as the article left over by site reconnaissance,karst,fissure,leakage grout.The paper mainly introduces the methods of how to solve the problems.It is proved that these methods are practical,which could offer the readers some references.