Overview of Baozhusi Hydropower Station

The main buildings are barrage, hydropower station, wooden road, industrial water intake facilities and reserved irrigation water intake.

The barrage is a concrete gravity dam with a height of 595m and a total length of 524.48m The dam is divided into 27 dam sections, of which 1 -9 is the right bank dam section, 10 -22 is the powerhouse dam section and its left and right spillway dam sections, and 23 -27 is the left bank dam section.

The dam site controls the drainage area of 28,428 square kilometers. The average annual flow of the dam site is 335 cubic meters per second, and the annual runoff is 654.38+0.05 billion cubic meters. The measured maximum discharge at Sanleiba Hydrological Station downstream of the dam site is 8960m3/s, and the measured minimum discharge is 85m3/s: historical maximum discharge18600m3/s.. The average sediment transport for many years is 265,438+600,000 t, and the average sediment concentration for many years is 2.04 kg/m3. There are abundant mountains and high water on both sides of the reservoir, and the banks at the bottom of the reservoir are mostly composed of impermeable rocks, so the terrain is closed and there is no permanent leakage problem. The bedrock of the dam site is Ordovician sandstone and Silurian shale. The rock mass of the dam is mainly hard sandstone, and the wet compressive strength is 186MPa. The main engineering geological problem of dam site is the stability of rock mass caused by combined cutting of weak structural planes such as interlayer argillaceous interlayer. Through geological exploration, especially the exposure of river tunnel, it is considered that the sliding problem of high slope on the left bank and deep riverbed can be properly solved by general engineering measures. The basic earthquake intensity in the dam site area is 6 degrees.

When the normal water level is 588m, the reservoir area is 6 1.2km2, and the backwater length of the main stream is 67km. Reservoir inundation involves Guangyuan and Qingchuan in Sichuan, Ningqiang in Shaanxi and Wenxian in Gansu, and the main inundation loss is in Sichuan Province, accounting for about 90%. The standard of reservoir inundation and resettlement is 30-year sediment deposition, the standard of farmland expropriation is 5-year flood, the standard of residential housing is 20-year flood, and the standard of main highway inundation is 25-year flood. According to the above standards, the submerged physical indicators are: 29,239 people have emigrated, including 26,203 agricultural people; 3 1.222 mu of flooded farmland, including 22,552 mu of paddy fields and dams; The flood affected 70km of Gansu-Sichuan Highway and16km of Qingchuan-Zhao Hua Highway.