深基坑水平止水帷幕无压性地下水控制设计及实践

Design and practice of non-pressure groundwater control for horizontal waterproof curtain in deep foundation pit

摘要:

沉降微扰动控制区域进行深基坑建设中，采用水平止水帷幕进行地下水控制的技术变得越来越重要。本文探讨了水平止水帷幕无压性地下水控制设计的原理，并应用到某车站的地下水控制设计中，抽水试验及最终的工程实践表明，水平止水帷幕的设计和施工达到了预期的效果。在此基础上针对水平止水帷幕施工工艺及渗漏检测方法、施工开挖期间的水位实时观测和预警提出了建议。

Abstract:

For the deep foundation pit construction in settlement micro-disturbance control area, the horizontal waterproof curtain technique is more and more important in the groundwater control. The design principle of non-pressure groundwater control technology by the horizontal waterproof curtain is discussed and this technology is applied in the groundwater control design of a subway station. The pumping test and the final engineering practice result show that the design and construction of horizontal waterproof curtain have achieved the expected effects. On this basis, the suggestions are put forward for the construction technology & leakage detection methods of horizontal waterproof curtain and the real-time observation & early warning during excavation.