西四环暗涵工程以其工程难度大、工期长成为南水北调中线工程的主要控制性工程之一。在设计中将浅埋暗挖技术首次应用于大流量有压输水暗涵,进一步拓展了适用于城市输水工程的工程技术手段。对结构及全封闭防水层的设置进行了专门的论证分析,突出了监控量测的重要地位,并将第三方监测引入到水利工程中。 Nansihuan HAN project with its difficult engineering, construction period has become a major project of the South-to-North Water Diversion Project. In the design of shallow buried tunneling technology for the first time applied to large flow pressurized culvert, further expanding the engineering and technical means suitable for urban water projects. The structure and fully enclosed waterproofing layer set up a special demonstration and analysis, highlighting the important position of monitoring and measurement, and third-party monitoring into the water conservancy project.