CFG桩复合地基承载力质量问题探析

Discussion on bearing capacity quality problem in CFG pile composite foundation

南水北调温博三标大沙河倒虹吸CFG桩试验区施工后,检测时发现CFG桩的复合地基承载力均不满足设计要求。通过一系列的分析、研究,找到了出现质量问题的原因,主要是持力层土壤扰动、雨水浸泡造成的地基承载力降低,并据此提出了施工时要注意的事项。

After South-to-North Water Diversion Project Wenbo Bid 3 Dasha River Inverted Siphon CFG pile test area is constructed, it is found that CFG pile composite foundation bearing capacity does not meet design requirement during detection. Causes of quality problems are discovered through a series of analysis and study, mainly including soil disturbance in supporting layer, and reduction of foundation bearing capacity due to rainwater immersion. Notes that should be emphasized during construction is proposed accordingly.