大渡河猴子岩水电站设计

Design for Houziyan hydropower station at Dadu RiverAbstractThe Houziyan hydropower station is located in Kongyu,Kangding County,GanziTibetan autonomous Prefecture,Sichuan Province.It is the ninth of 22 development programs,recommended by the Report of Adjusting Hydropower Plan about Dadu River in Sichuan.Itis a dam-type hydroelectric station,and its reservoir is about 60km long,with 957 million m3total reservoir capacity and 507 million m3 utilizable capacity.So the reservoir is belong toalpine canyon channel type.The normal,limited and extreme dead water level are 1852.0m,1842.0m and 1812.0m respectively.The station is located in the upper reaches of Dadu River,a natural unnavigable river.There will be no demand for navigation,water supply,irrigationor flood protection in its long-term plan.Therefore,the station is built only for electricity.Theinstalled capacity of this station is 1600MW with six units when the station can product 7635GW.h per year on average.The design decided to adopt HL160 Francis turbine and SF300-20/1207 suspendedgenerator ultimately.The rated speed of the units is 150 r/min,with a rated head of 142.0mand a rated discharge of 240.1 m3/s.According to the result of flood regulating calculation,the altitude of the top dam is determined to be 1858.09m.All of the outlet structures includetwo-spillway tunnel,an overflow weir and an emptying tunnel.One diversion tunnel cansupply water to two turbine.And three diversion tunnels are arranged at left bank next to eachother.There must be a surge shaft with an upper diameter of 34m in the tunnel by calculating.The station is made up with a powerhouse,an auxiliary house,a main transformer factory,aswitching station and a tailrace.The powerhouse is 195.62m long and 32.60m wide,when thegenerator floor is an elevation of 1700.0m.The T-shaped section crane girder is a staticallyindeterminate structure.It has been calculated that the girder can satisfy both the bearingcapability and serviceability request.Key Words:layout of hydro-project;hydropower station:turbine:crane girder.-Ⅱ