溶洞地基钻孔灌注桩基础施工方法及其质量控制措施应用

Construction Method of Cast-In-Place Pile Foundation in Karst Cave Foundations and Application of Quality Control Measures

本文针对溶洞地基的特点和危害,以及溶洞地基钻孔灌注桩基础施工方法展开分析,内容包括桩身垂直度控制、持力层施工质量控制、桩底持力层质量控制、清孔质量控制,等等。结合溶洞地基钻孔灌注桩基础质量控制措施,研究漏浆、塌孔、偏孔、卡钻、掉钻、埋钻、混凝土流失、钢筋笼等常见施工问题及其原因,并提出处理措施,其目的在于积累有价值数据信息,为相类似工程作业活动的推进奠定基础。

This article analyzes the characteristics and hazards of karst cave foundations,as well as the construction methods of cast-in-place pile foundation for karst cave foundations,including the control of the verticality of the pile body,the construction quality control of the bearing layer,the quality control of the bearing layer at the bottom of the pile,and the quality control of the hole cleaning.Combined with the quality control measures of the cast-in-place pile foundation for karst cave foundations,the common construction problems and their causes such as slurry leakage,collapsed holes,partial holes,stuck drills,dropped drills,buried drills,concrete loss,and reinforcement cages are studied,and the treatment measures are proposed.The purpose is to accumulate valuable data information and lay the foundation for the promotion of similar engineering operations.