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拉西瓦水电站工程,位于青海省贵德县与贵南县的交界处.采用双曲薄拱坝方案,坝高250m,装机372万kW,是正在设计中的黄河上规模最大的水电站.该工程的库、坝区地处青海南山印支槽向斜内.从区域地质调查及卫星照片上可以看到:青海南山,拉脊山、鄂拉山及阿尼玛卿山等山底的基底断裂,把该向斜的东部地区分割成菱形地块,水电站工程就位于这菱形地块的东北部.自元古代以来本区曾发生过多次构造运动,受其影响,区域构造主压应力方向曾有过五次变迁.区域地质调查、断层活动性监测及热释光地质年代测定的结果表明:该区域11万年以来均属相对稳定地带.
Laxiwa Hydropower Project is located at the junction of Guidi County and Guinan County in Qinghai Province.Using the hyperbolic thin arch dam scheme, the dam height is 250m and the installed capacity is 3.72 million kW, which is the largest hydropower station under design in the Yellow River. The reservoir and dam area of the project are located within the syncline of the Indosinian Passage of Nanshan in Qinghai Province.From the regional geological survey and satellite photos, we can see the basement faults at the base of the mountain such as Nanshan, Lajishan, Ela Mountain and Animaqing in Qinghai , The eastern part of the syncline is divided into diamond-shaped blocks, and the hydropower station project is located in the northeast of this rhombic block.Many tectonic movements have occurred in this area since the Proterozoic. Influenced by the main tectonic stress direction There have been five changes.Regional geological survey, fault activity monitoring and thermoluminescence geochronology results show that: the region has been relatively stable for 110,000 years.