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一、对三峡工程施工技术可行性的分析论证领导小组第四次(扩大)会议提出以一级开发、一次建成、分期蓄水、连续移民,坝顶高程185米、最终正常蓄水位175米,初期正常蓄水位156米的方案作为初选方案。施工专家组赞同依据这个初选方案进行工作。 (一)工程概况工程按三期进行安排。一期工程主要是在右岸一期围堰范围内修建导流明渠和混凝土纵向围堰,同时进行左岸临时船闸和垂直升船机以及其他水上部分基础开挖的施工,江水由主河槽下泄。二期工程主要是以二期围堰围左岸主河槽,修建溢流坝及左岸大坝和厂房,同时进行水久船闸和升船机的施工,江水由右岸导流明渠下泄。这一期后期在导流明渠做三期围
First, the feasibility analysis of the construction technology of the Three Gorges Project Demonstration The fourth leading group (enlarged) meeting proposed to develop at a level, a built, staging water, continuous immigration, crest elevation of 185 meters, the final normal water level of 175 meters , The initial normal water level of 156 meters of the program as a primary election program. The construction expert group agrees to work on the basis of this primary election. (A) Project Overview Project arranged by three phases. The first phase of the project mainly involves the construction of diversion channels and concrete longitudinal cofferdams within the scope of the right bank cofferdam. Meanwhile, the construction of the temporary lock of the left bank and vertical ship lift and other foundation parts of the water section will be carried out. The river will be discharged from the main channel. The second phase of the project mainly consists of the main channel of the left bank of the second cofferdam, the construction of the overflow dam and the dam and workshop on the left bank, and the construction of a long-time lock and lift ship. The river is discharged from the right bank diversion channel. The latter part of this period in the diversion channel to do three Wai