Xiluodu Hydropower Station is located on the Jinsha River in Leibo county ,Sichuan Province and Yongshan county , Yunnan Province. It is a huge water conservancy andhydropower project with main purpose of power generation and other functions of sedimentretaining and downstream navigation condition improving . It consists of the dam , spillwaystructures, water conveyance and power generation works and river diversion works. Theproject will mainly supply power to East China and Central China areas and satisfy powerdemand in Sichuan and Yunnan as well. It is one of the key power sources on the Jinsha Riverfor “west-east power transmission” in China at the shortest distance and is also the largesthydropower station on this river. The dam is a concrete double curvature arch one with its crestelevation of 610.00m, the lowest dam base elevation of 332.00m, the maximum height of278.00m, the crown cantilever base width around 60.00m(the maximum width is 64m), the damcrest width of 14.00m and arc length of 681.49m along the dam axis . Concrete volume of thedam reaches 5.58×106 m3. The whole dam is divided into 31 blocks .Because the dam plays animportant part in the project and its construction schedule is on the critical path of constructionat Xiluodu Project, the dam construction characteristics are studied including the structures,topographic and geologic conditions and construction schedule etc. The method of computersimulation of the dam concrete construction for various cableway layout alternatives and damconcrete placement schemes is presented. The simulation analysis procedures and results aredescribed . The dam contraction joint grouting scheme is analyzed and determined. The detailconstruction schedule and construction scheme of dam are worked out. It is expected that thedam concrete placement will commence in November 2008. By the end of July 2011, the top oflowest dam part will be constructed up to el.481.00m and the contraction joints will be groutedto el.451.00m. By the end of May 2012, the top of the dam lowest part will reach to el.526.00mand the contraction joint grouting will be finished up to el.499.00m. In May 2013 , the top ofthe lowest dam part will be at the elevation of 601.00m and the dam contraction joints will begrouted up to el.586.00m. All the above conditions will fully meet the requirements of the damconcrete construction during flood season every year according to the river diversion planning .In flood season of 2013, the flood flow will be able to be discharged through 4 spillway tunnels,4 diversion bottom outlets and 8 low level spillway outlets in the dam .
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