截水帷幕质量控制关键环节与效果检验方法

Key Links of Quality Control and Methods of Effect Inspection of Water Cut-off Curtain

截水帷幕目前广泛应用于水利水电、铁路交通、煤矿开采等防渗水领域。为保证截水帷幕的截水效果,以地下连续墙截水帷幕工法为例,总结了在槽段开挖、墙体材料浇筑和槽段之间连接3个关键工序施工期间的质量控制措施,提出了以流场观测法、抽水试验法、取心验证法和疏排水量分析法为主的4种效果检验方法。提出的质量控制措施和效果检验方法对其他形式截水帷幕的质量控制和效果检验具有普遍适用性。

Water cut-off curtain is widely used in water conservancy and hydropower,railway transportation,coal mining and other anti-seepage areas.In order to ensure the water reduction effect of water cut-off curtain,taking the construction method of underground diaphragm wall as an example,summarizes the quality control measures during the construction of three key processes:excavation of trench section,pouring of wall material and connection between trench sections,and puts forward four methods of effect test,such as flow field observation,pumping test,core sampling verification and hydrophobic analysis.The quality control measures and effect inspection methods proposed have universal applicability for quality control and effect inspection of other forms of water closure curtain.