The Pandaoling tunnel is the longest non-pressure diversion tunnel of the main channel from Datong river to water irrigation project at Qinwangchuan region.
盘道岭隧洞是引大入秦灌溉工程总干渠上最长的无压引水隧洞。
The diversion tunnel section excavated by tunneller is buried deeply, the under ground water level is high, the activities of underground water is lively, and Karst topography is quite developed.
采用掘进机开挖的引水隧洞洞段埋藏较深，地下水位高，地下水活动强烈，岩爆频繁，岩溶较为发育。
In the Qing Jiang diversion tunnel of water power engineering, the bench cut method is applied and construction simulation is analysed.
清江水布垭导流洞具有复杂的工程环境，考虑工程各种不利因素确定采用台阶法施工，并对隧洞施工进行了数值模拟。
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