Key technical problems of the Three Gorges Project construction

摘要

The Three Gorges Project (TGP) has huge work load, amounts to about 2.8 X 10~7 m~3 concrete, 1.04 X 10~8 m~3 earth-rock excavation and 7.2 X 10~5t metal structures and reinforcing steel bars. TGP is constructed in three stages, 5 years preparative and the first stage, 6 years the second stage and 6 years the third stage. Main river closure of the second stage and diversion channel closure of the third stage were orderly actualized. In the second stage, from 1998 to 2003, poured 1.846 X 10~7 m~3 concrete and installed 1.92 X 10~5 t metal structures and embedded elements of mechanical and electrical equipments. The new world's record of 5.4285 X 10~6 m~3 concrete-placing in one year was created in 2000.