某建筑工地基桩工程质量事故分析

Analysis of Constructional Foundation Pile Engineering Accident

某建筑工地在浇筑混凝土基桩时产生了严重的质量问题,出现了部分桩体产生严重离析、分层甚至没有强度等问题。针对该混凝土基桩取芯样品产生的问题进行了分类整理分析,并对取芯样品强度、细集料、粗集料、地下水、水泥等组成材料进行试验检测与分析,并按施工条件设计了实验室内模拟实验,对事故原因进行了分析解释。试验结果显示:混凝土取芯样品强度偏低,各组成材料及地下水均满足要求,模拟实验结果证实造成混凝土基桩质量问题的主要原因是由于地下水未排干、未下导管并振捣所致。

A constructional foundation pile engineering accident in Sichuan province was analyzed in study which was focused on the core sample of the concrete pile and the constituent materials of concrete. The data was analyzed and settled in this script. The compressive strength, coarse and fine aggregate, underground water and cement were tested and analyzed. A simulation experiment was also designed and carried out to elaborate the accident. The result showed that the compressive strength of concrete was low and the material of concrete was under request. The reason of the accident was the underground water could not be swab-off without conduit pipe. The cause of the engineering accident was researched and elaborated which was an important reference and guidance to avoid engineering problem of concrete pile.