论文部分内容阅读
南水北调西四环暗涵工程输水隧洞采用浅埋暗挖法施工,开挖直径3.7 m,埋深约2～8 m,开挖洞径小,高程降低快,且连续转弯,特别不利于开挖质量控制。施工中,通过加强小导管注浆、密切勘探地下管线、加强监控量测、精确测量放线等方式,较为顺利地完成了此段隧洞施工,保证了施工安全、质量及进度。
The water diversion tunnel of the Nansihuan Hulian Project of the South-to-North Water Diversion Project is constructed by means of shallow burying and undercutting. The excavation diameter is 3.7 m and the burying depth is about 2 ~ 8 m. The excavation tunnel is small, the elevation is reduced rapidly, and the continuous turning is especially detrimental to opening Dig quality control. During the construction, the tunnel construction was completed smoothly by strengthening the grouting of small pipes, closely surveying the underground pipelines, strengthening the monitoring and measuring, and accurately measuring the payoff and so on. This ensured the construction safety, quality and progress.