苏丹某工程钻孔灌注桩桩头缺损原因分析及预防

Cause Analysis and Prevention of Damage of Drill Cast Pile of an Engineering Subject in Sudan

在砂层等不良条件下施工钻孔灌注桩容易出现断桩、缩径、桩头缺损等质量通病。分析了苏丹尼罗河边松散砂层中旋挖钻机施工的钻孔灌注桩桩头达不到设计标高和缺损等事故,逐一分析了事故发生的过程、产生的原因及应吸取的经验教训,提出了相应的预防措施。

Common pile quality faults such as pile break, cross shrink, pile end damage are often met in sand stratum. Short of design elevation and damage of drill cast pile in Sudan Nile bank constructed by spin-dig borer are discussed in this paper. Developing process, cause and experience of these pile quality faults are also demonstrated and measurement of preventing fault is put forward.