厚砂覆盖层喀斯特地质条件下群桩综合施工技术

Comprehensive Construction Technology of Group Piles Under Karst Geological Conditions with Thick Sand Overburden

结合工程实际,对厚砂覆盖层喀斯特地质条件下的桩群施工技术进行了研究。在超前钻基础上,介绍了覆盖层塌陷半定量预测、钢护筒后跟进护壁、抛填片石及袋装黏土混合料和气举反循环清孔等综合施工技术,以期为同类工程的施工提供借鉴。

Combining with the actual engineering practice,the pile group construction technology under karst geological conditions of thick sand overburden is studied.On the basis of overburden drilling,the integrated construction techniques such as semi-quantitative prediction of overburden collapse,steel retainer followed by retaining wall,throwing flake and bagged clay mixture and air lift reverse cycle hole cleaning are introduced,so as to provide a reference for the construction of similar projects.