软岩筑坝料在芝瑞抽水蓄能电站中的应用OACSTPCD

According to the characteristics of soft rock materials in the excavation materials of the upper reservoir basin of Zhirui Pumped-storage Power Station,the application of soft rock dam materials in the upper reservoir of Zhirui Pumped-storage Power Station is explored combined with the study of filling design parameters,indoor mechanical tests and dam slope stability analysis.The results of stability calculation show that,(a)it is feasible for the upper reservoir dam of Zhirui Pumped-storage Power Station to adopt 70% stomatal basalt+30% tuffaceous breccia in the rockfill Zone 2 and to use the excavated tuffaceous breccia material as the filling material in the rockfill Zone 3;and(b)it is suitable to adopt the slope ratio of 1∶2.0 for the downstream dam slope above 1550 m elevation and the 15 m-width rockfill Zone 2 to protect the rockfill Zone 3,and to control the compaction degree of 0.98 by heavy compaction in the rockfill Zone 2 and Zone 3,that can sufficiently guarantee the stability and safety of the dam.