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我国目前在建的最大水电站——二滩水电站自1991年9月主体工程开工以来,在各方面的共同努力下,工程进展顺利。目前,处于施工关键线路上的左、右岸导流隧洞开挖断面达20.5m×25.0m(宽×高),顶部开挖已于1992年8月贯通,现正在进行中、下部开挖,其中左、右岸出口段开挖断面已基本到位,计划采用钢模台车进行隧洞衬砌全断面混凝土浇筑。根据施工网络进度,左、右岸导流隧洞将在1993年10月中旬竣工,以保证1993年12月10日河床截流。
Since the construction of the main project of Ertan Hydropower Station, the largest hydropower station currently under construction in China, started in September 1991, the project has progressed smoothly with the concerted efforts of all parties. At present, the excavation sections of the diversion tunnels on the left and right banks on the key construction lines are 20.5m × 25.0m (width × height). The excavation at the top was completed in August 1992 and the middle and lower excavations are currently underway, in which The left and right bank exit section excavation section has been basically in place, plans to use steel mold trolley tunnel full-face concrete pouring. According to the progress of the construction network, the diversion tunnels on the left and right banks will be completed in mid-October 1993 to ensure river closure on December 10, 1993.