深基坑上部放坡段事故分析与防治措施

The prevention measures and accident analysis for the slope of the upper part of deep foundation

随着工程建设技术的发展,深基坑支护风险得到重视和有效控制,但深基坑上部放坡段(挂网喷浆支护)常出现工程事故。文章以某工程事故为例,介绍了该工程在外部因素(强降雨)作用下放坡挂网喷浆段发生的坍塌事故,分析了事故发生的原因,阐述其处理措施,并基此提出类似工程今后防治措施,避免重蹈覆辙。

With the developing of the engineering construction technology,the risk of the retaining and protecting for the deep foundation excavation has been attached importance to and effectively controlled,yet there are engineering accidents usually in the upper the deep foundation pit of the slope. This article takes an engineering accident as an example,showing the collapse accident in the upper of the deep foundation when this construction project is effected by external factors（ like rain）,analyzing the reason and solutions of this accident. In the end,the prevention measures of similar projects are put forward to avoid the same mistake.