深基坑承压水组合式处理措施的研究及应用

代兴云，应卫超，孙海明

摘要:

随着社会发展，基坑的开挖越来越深，如何更经济、更安全、更有效的处理基坑承压水问题越来越重要。本文结合杭州某地铁深基坑工程，对四种常见的承压水处理措施进行了分析，提出深基坑承压水组合式处理方法；并采用数值分析软件对隔水帷幕的长度进行了数值模拟分析，计算出最经济的、最合理的围护深度为63m；通过现场的抽水试验进一步验证了数值模型的合理性，试验的结果也验证了的深基坑承压水组合式处理方法的可行性；可为杭州等地区其他深基坑承压水处理提供有益的参考。

Abstract:

With the development of society, the excavation of foundation pit is deeper and deeper, How to deal with the confined water of foundation pit more economically, safely and effectively is becoming more and more important. Combined with the deep foundation pit project of a subway in Hangzhou, this paper analyzes four common treatment measures of confined aquifer, The combined treatment method of confined water in deep foundation pit is proposed. The length of water curtain is simulated and analyzed by numerical analysis software, and the most economical and reasonable enclosure depth is 63m. The rationality of the numerical model is further verified by the field pumping test, The test results also verify the feasibility of the combined treatment method of confined aquifer in deep foundation pit. At the same time, it provides a useful reference for the treatment of confined aquifer in other deep foundation pits in Hangzhou and other areas.