喀斯特地区钻孔灌注桩施工工艺及承载能力研究

Research on Construction Technology and Bearing Capacity of Bored Pile in Karst Areas

文章总结了喀斯特区钻孔灌注桩溶洞处理方法,依托某高速公路大桥工程,从埋设护筒、制备泥浆、钻孔清孔、灌注混凝土等方面阐述了喀斯特地区桩基的施工要点,同时分析了喀斯特区钻孔灌注桩承载力来源及单桩承载力、群桩承载力计算方法,研究成果可为喀斯特地区桥梁桩基施工提供理论参考。

This paper summarizes the bored pile karst cave treatment method in karst areas.Based on an expressway bridge project,the construction points of pile foundation in karst areas are expounded from the aspects of casing burying,mud preparing,hole drilling and cleaning,and concrete pouring.At the same time,the bearing capacity source of bored pile in karst areas and the calculation method of single pile bearing capacity and group pile bearing capacity are analyzed.The research results can provide theoretical reference for bridge pile foundation construction in karst areas.