Xiangjiang River Changsha Navigation and Power Hub Project is a major project in Hunan Province and Changsha City during the Eleventh Five-Year Plan period. It is a public welfare infrastructure construction project that mainly adapts to the construction of Xiangjiang waterway, improves the level of urban and rural water supply security and the needs of urban development in Changsha and Xiangtan, and gives consideration to power generation and transportation functions. Increasing the navigation capacity from Changsha to Hengyang Xiangjiang Chenglingji from 1000 tons to 2,000 tons will help to ensure water supply, improve the riverside environment in Xiangjiang scenic belt, develop tourism resources, enhance the city's taste, enhance the overall economic competitiveness of Changsha, Zhuzhou and Xiangtan, and accelerate the pace of building a "two-oriented society" in Changsha, Zhuzhou and Xiangtan urban agglomeration; It is an important economic project, environmental improvement project and livelihood project. The main construction contents of this project include: lock, sluice, power station, highway bridge at dam top, fishway, bank protection and owner's camp, etc. The hub is the left bank flood dike, the left bank auxiliary dam and the reserved third-line lock, second-line lock, first-line lock, 26-hole low weir gate with a clear width of 22m, 1 hole with a clear width of 7m, the power plant, Caijiazhou auxiliary dam and 20. The scale of the lock, sluice and power station of the hub is as follows: the lock level is 2000 tons, the effective size of the lock chamber is 280m×34m×4.5m (length× width× door depth), the 2,000-ton double-line lock has an annual storage capacity of 98 million tons, 46-hole sluice, 6 single bulb tubular hydrogenerators, 27m wide and 1900. The design flood of the first-class permanent hydraulic structure is once in 100, the check flood is once in 500 years, the design flood of the permanent second-class hydraulic structure is once in 30 years, and the check flood is once in 100.
Spillway gate has 46 holes, left branch has 26 holes, weir crest elevation 18.5m, single hole net discharge width of 22m and discharge width of 572m；; The right branch has 20 holes, the crest elevation is 25.0m, the net discharge width of a single hole is 14m, and the discharge width is 280 m; The total discharge width of the left and right branches is 852m, the design flood standard is 100, and the corresponding discharge is 26,400 m? /s, check the 500-year flood standard, and the corresponding flow is 30,200m? /s. The power station is a riverbed workshop with a total installed capacity of 57MW. Six single 9500 kW bulb tubular units were installed, with an average annual power generation of 232 million kWh.
The upstream of the dam is 26 kilometers away from Juzizhou Bridge, the upstream is 26 kilometers away from Zhuzhou Navigation and Power Hub 13 1.4, and the downstream is 35 kilometers away from Wenxing Town, Xiangyin County. The normal water level of the reservoir is 29.7 meters (the elevation of the Yellow Sea) and the storage capacity is 675 million cubic meters.