软土深基坑高压力水头承压水突涌治理与研究

在软土深大基坑开挖过程中,高水头承压水对基坑的威胁不容轻视。依托于长江北岸某软土深基坑高压力水头承压水突涌事故,从降低承压水水头方向入手,通过理论计算和数值模拟对比分析现场监测数据,研究通过减压降水降低坑内外承压水水头的工程措施,实现对高压力水头承压水导致的基坑突涌事故的治理。结果表明:坑外施工降水井进行减压降水对于基坑突涌的治理效果显著。

Control and Research on High Pressure Head Confined Water Surge in Deep Foundation Pit in Soft Soil

In the process of deep and large foundation pit excavation in soft soil, the threat of high head confined water to foundation pit should not be underestimated. Starting from the direction of reducing confined water head, relying on the high pressure confined water head inrush accident of a deep foundation pit in soft soil of the north bank of the Yangtze River, the paper studies the engineering measures of reducing confined water head inside and outside the pit by decompression precipitation through numerical simulation calculation and comparative analysis of site monitoring data, so as to realize the treatment of pit inrush accident. The results show that decompression dewatering is an efficient and cost saving measure for the treatment of foundation pit water gushing.