钻孔灌注桩断桩成因分析与预防

在钻孔灌注桩工程中，断桩事故是危害最为严重而且最难处理的一种事故。造成断桩事故的主要原因，既有可能产生于成孔阶段，也有可能产生于砼灌注阶段，因此必须根据不同阶段采取相应的预防措施。实践表明，必要的预防措施有助于减少断桩事故的发生。

The Analysis of Reasons of Pile Breaking and its Prevention in Bored- Pile

Pile-break is the most serious and hard-handled pile failure of the bored pile engineering. The reasons cause a pile-break come from either the step of drilling or the step of concrete grouting. Thus we must carry out the corresponding preventive measures during the different steps. In fact,as we know , the necessary preventive measures benefit the decrease of pile-break.