在青铜峡水电站混凝土坝基础中有9条大断层通过,其中以左岸重力坝下的F_1和右岸重力坝下的F_(5、6)断层最为严重,其宽度达12～18米,充填差,又因与岩溶共生,渗水量高达800升/秒,承载能力较低。为了保证大坝安全,施工时曾按国内大多数工程的做法,对大断层采取了回填混凝土塞的结构处理措施。当 There are nine large faults in the foundation of Qingtongxia Hydropower Station concrete dam, of which the F_ (5, 6) faults under the left bank gravity dam and the right bank gravity dam are the most serious, with a width of 12 ~ 18 meters, poor filling, Because of the symbiosis with karst, seepage volume up to 800 liters / sec, carrying capacity lower. In order to ensure the safety of the dam, according to the practice of most domestic projects during the construction, structural measures of backfilling of concrete plugs were adopted for large faults. when