The construction design and practice of Three Gorges Project

The construction of Three Gorges Project （TGP） is characterized by large construction scale, high construction intensity and complexity in technology. In view of various technical difficulties such as navigation in construction period, two river closures, high-intensity concrete and earth-rock construction, high-intensity construction and demolition of RCC （roller compacted concrete） cofferdam in stage III and immediate navigation of double-line five-step shiplock after impoundment of reservoir, the scheme of river diversion during construction is adopted, namely ＂diversion in 3 stages, open channel navigation and cofferdam power generation＂. The practice and innovation achievements in river diversion during construction as well as earth-rock and concrete construction are presented emphatically.