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三峡工程分三期,总工期17年。 一期工程5年(1993-1997年),除准备工程外,主要进行一期围堰填筑,导流明渠开挖等。 二期工程6年(1997—2003年),工程主要任务是修筑二期围堰,左岸大坝的电站设施建设及机组安装等。导流明渠截流是二期工程转向三期工程建设的重要标志。 三期工程6年(2003-2009年),本期进行右岸大坝和电站的施工,并继续完成全部机组安装。届时,三峡水库将是一座长达600公里,最宽处达2000米,面积达10000平方公里,水面平静的峡谷型水库。
The Three Gorges Project is divided into three phases with a total construction period of 17 years. In the first phase of the project for five years (1993-1997), in addition to the preparation of the project, the first phase of the reclamation of the cofferdam and the diversion of the diversion channel were mainly carried out. The second phase of the project is 6 years (1997-2003). The main tasks of the project are the construction of the second-stage cofferdam, the construction of the power plant facilities of the left bank dam, and the unit installation. The closure of diversion channels is an important symbol for the construction of the second phase of the project. The third phase of the project was for 6 years (2003-2009). During the current period, construction of the right bank dam and power station was carried out and the installation of all units was continued. By then, the Three Gorges Reservoir will be a canyon reservoir with a length of 600 kilometers, a maximum width of 2,000 meters, an area of 10,000 square kilometers, and a calm water surface.