第三系砾岩建筑拱坝的工程地质问题分析与评价

Engineering Geology Analysis and Assessment on Arch Dam Founded on Conglomerate of Tertiary Period

雅安铜头电站是国内第一座在下第三系砾岩上建造的双曲薄拱坝 ,坝高 75 m。对该坝基础下第三系砾岩的工程地质特征及拱坝存在的主要工程地质问题进行评价 ,并针对其地质问题提出了工程处理措施。建成后工程已正常运行 5年 ,表明在下第三系砾岩上建拱坝 。

The Tongtou hydropower station is the first double curvature thin dam founded on conglomerate of Tertiary period in China and the dam height is 75m .The assessment is carried out on characteristics of engineering geology in dam foundation and main engineering geology problems on arch dam and treatment measures are taken . Five-year normal operation since completion of the project show that dam can be built on conglomerate of Eogene System if proper treatment measures are taken .