岩溶区段大直径钻孔灌注桩施工技术

结合毫山村高架桥岩溶段大直径钻孔灌注桩实践,轻微溶蚀采取常规的片石黏土填充挤密,一般溶洞加入水泥和护筒,深大溶洞先填后用多级护筒跟进,并在施工过程加强监控,针对地质选择和改进钻机,取得较好的效益。

Construction Technology of Large-diameter Cast-in-situ Bored Piles in Karst Section

Combined with the practice of the large-diameter cast-in-situ bored pile in Haoshan Village viaduct carst section,this paper introduces the technique that treating a slight corrosion with a regular filling and compaction of clay and stones,normal karst caves by adding cement and caring caves,and for deep ones firstly filling then the multi-level caring tube followed-up.And also the monitoring is strengthened during construction process,and the drill is chosen and improved according to the geological conditi...