岩溶地区钻（冲）孔灌注桩施工的难点及其技术对策

Construction Difficulties of Bored Cast-in-situ Pile in Karst Area and the Technical Countermeasures

摘要:

岩溶地区施工钻（冲）孔灌注桩难度较大，出现质量隐患的概率较高。针对钻（冲）孔灌注桩在岩溶地层中施工时遇到的溶洞区桩底高程的控制、漏浆与塌孔、偏孔与斜桩、卡钻或锤头脱落、混凝土流失、扩径与缩颈等问题进行分析，并提出相应的技术对策。

关键词:岩溶地区;钻（冲）孔灌注桩;施工难点;技术对策

Abstract:

It is difficult to carry out construction of bored cast-in-situ pile in the Karst area with high probability of quality problems. The article shows the analysis on the problems encountered during the course of bored piles construction in the Karst area, and it also provides the relevant technical countermeasures.

Key words:karst area; bored cast-in-situ pile; construction difficulty; technical countermeasures