南四湖大桥岩溶区桩基施工全护筒跟进处理技术

Study on the follow-up treatment technology of pile foundation construction in karst area of Nansihu bridge

枣菏高速南四湖特大桥桩基施工场地岩溶发育,溶洞大小不一,为半填充或全填充,在处理溶洞过程中,出现卡钻、掉钻现象,给施工造成难度。在工程实际建设中,采用全护筒跟进技术处理不同岩溶溶洞,提高桩基施工质量。

The construction site of the pile foundation of Nansihu super large bridge of Zaohe high speed has developed karst,and the size of the karst cave is different,which is half filled or full filled.In the process of dealing with the karst cave,the phenomenon of sticking and falling out of the borehole occurs,which makes the construction difficult.In the actual construction of the project,the full casing follow-up technology is used to deal with different karst caves,improve the quality of pile foundation construction.