三期RCC围堰工程项目是确保三峡工程2003年蓄水、通航和发电目标按期实现的关键项目，也是右岸厂房坝段和右岸电站厂房等后续施工项目安全施工的保障。受施工通航、施工场地及工期条件等限制，三期RCC围堰的混凝土施工强度和上升高度均超过目前现有施工水平，针对这些难点开发出有效的处理工艺，保证了围堰工程的实施。

The phase Ⅲ RCC cofferdam construction belongs to the phase Ⅲ diversion works. It is a key item to ensure achievement of the reservoir impoundment, navigation and power generation in 2003 and the guarantee to the safety construction of the follow-up right-bank intake dam section and the powerhouse. Restrained by navigation while construction, the construction site and duration, both the concreting intensity and the rise height of the phase Ⅲ RCC cofferdam exceed the current construction level. In view of these difficulties, a huge amount of research work has been performed by relevant departments and is described in the paper.