How many years is the service life of the Three Gorges Dam?

1. The Three Gorges Dam, located in Yichang City, Hubei Province, China, 38km away from the downstream Gezhouba Water Control Project, is the main project of the Three Gorges Hydropower Station, the core landscape of the Three Gorges Dam tourist area, the eastern end of the Three Gorges Reservoir and the largest hydropower project in the world.

The Three Gorges Dam Project consists of the main building and diversion works, with a total length of about 2308m and a dam height of 185m. The total investment of the project is 95.46 billion yuan, which was officially started on May 20, 2006 and successfully completed on May 20, 2006.

With the approval of the National Defense General, the Three Gorges Reservoir was officially started at 0: 00 on September 201year 175m for the fourth experimental water storage. By 9: 00 on June 8/kloc-0, the water level of the reservoir reached160.18m .. 20. The upstream inflow surged to 46,000 cubic meters per second. 20 12 On July 24th, the inflow of the Three Gorges Dam reached 7120,000 cubic meters per second, the largest flood peak since the Three Gorges Reservoir was built.

The dam height of the Three Gorges Hydropower Station is185m, the normal water level is175m, the reservoir length is 2,335m, and the static investment is135.266 billion RMB, and 32 hydropower units with a single capacity of 700,000 kilowatts are installed. The last hydropower unit of the Three Gorges Power Station was put into operation on July 4th, 20 12, which means that the Three Gorges Hydropower Station with an installed capacity of 22.4 million kilowatts became the largest hydropower station and clean energy production base in the world on July 4th, 20 12.

2. The best in the world

(1), comprehensive project scale. The total engineering quantity of the main building (including diversion) of the Three Gorges Project includes: earthwork excavation of building foundation/kloc-0.0283 million cubic meters, concrete foundation of 27.94 million cubic meters, earthwork filling of 3 198 million cubic meters, installation of metal structure of 256,500 tons, and installation of 34 sets of electromechanical equipment of hydropower station of 22.5 million kilowatts. Except for the amount of earthwork, other indicators rank first in the world.

② Single building is large. (1) Dam: The dam of the Three Gorges Project is of concrete gravity type, with a total length of 2,345 meters of water retaining front, the maximum dam height of 1, 8 1 m, and the total amount of dam concrete of 1, 700 million cubic meters, ranking first in the world. ⑵ Hydropower Station: The Three Gorges Hydropower Station is a powerhouse behind the dam. The single unit capacity, total installed capacity and annual power generation of hydropower stations rank first in the world. The delivery project of hydropower station includes two 500 kV DC transmission lines and 1 1 500 kV AC transmission lines, ranking first in the world. ⑶ Double-track five-stage shiplock: The Three Gorges cascade shiplock is an inland river shiplock with the highest total head (1 13m) and many stages (five stages) in the world. The effective size (280m long, 34m wide and 5m deep) and tonnage (10,000-ton fleet) of its single-stage lock chamber belong to the highest-level inland river lock built in the world. The maximum working head of the ship lock is 49.5 meters, the maximum irrigation and drainage is 260,000 cubic meters, and the maximum slope excavation height is 1.70 meters, all of which are the highest in the world. ⑷ Single-track first-class vertical ship lift: The effective size of the ship lift in Three Gorges Project is 120× 18× 3.5m, the total weight is 1 13000t, the maximum lifting height is 1 13m, and the tonnage of passing ships is. The Three Gorges ship lift is the largest and most difficult ship lift in the world.

③ The metal structure ranks first in the world. The metal structure of the Three Gorges Project includes 386 gates, 39 hoists 139, and 26 penstocks for water diversion, with a total engineering quantity of 266,500 tons. Its comprehensive engineering quantity ranks first in the world. Among the single metal structures, the inner diameter of diversion steel pipe 12.4m, the height of miter gate of permanent shiplock is 37.75m, the height of gate is 39.75m, and the maximum submerged depth during operation is 17-35m, all of which are the highest in the world.