压水试验在止水帷幕止水效果评价中的应用

Application of Water Pressure Test in the Evaluation for the Waterproof Effects of the Specialized Curtain

压水试验是检测基坑止水帷幕止水效果的直接方法。本文首先提出了一整套压水试验方法,重点解决了最大试验水压力的选择、试验段密封方法、微小流量测试方法等问题,在此基础上提出了使用压水试验结果评判止水帷幕止水效果的标准,利用此标准可对止水帷幕止水效果进行定性及定量的分析判断,有较强的可操作性,最后,结合工程实例验证了该方法的可行性。

Water pressure test is the commonly used method to test the waterproof capacity of specialized curtain directly. A whole set of the test procedures are designed in this paper, where solution to the problems, such as the selection of the maximum test water pressure, the scheme of sealing the test section and the measurement of the mi- cro flow rate are highlighted. Furthermore, the standard of using pressurized water testing to evaluate the waterproof effects the specialized curtain is proposed, which is effective and operable both for qualitative and quantitative anal- ysis and judgment. Finally, the feasibility of the proposed method is verified by engineering examples.