双江口水电站大坝心墙建基岩体松弛特征研究  

Study on the Relaxation Feature of Foundation Rock of Dam Core Wall of Shuangjiangkou Hydropower Station

作　　者：孙永清 李桂林 SUN Yongqing;LI Guilin(PowerChina Guiyang Engineering Co., LTD, Guiyang, Guizhou, 550081;Guodian Dadu River Hydropower Development Co., LTD, Chengdu, Sichuan, 610041)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081 [2]国电大渡河流域水电开发有限公司,四川成都610041

出　　处：《四川水力发电》2021年第S01期1-5,共5页Sichuan Hydropower

摘　　要：双江口水电站是大渡河流域水电规划“3库22级”的第5级,其拦河土质心墙堆石坝最大坝高312 m,是目前在建世界级高坝,为一等大(1)型工程。工程建设周期长,大坝建基开挖后,两岸坝肩及上部危岩体形成高度差约600 m的高边坡。建基面岩体松弛情况关系着高边坡稳定及后续基础处理措施,根据不同时期的声波检测数据,分析岩体松弛特征,评价坝肩边坡稳定,为后续基础处理提供可靠资料。Shuangjiangkou Hydropower Station is at the fifth cascade of the"3 reservoirs and 22 cascades"overall development scheme of the Dadu River Basin.The rock-filled dam with soil core wall is 312m in height,it is one of the world-class high dams under construction and classified as first class(A)project scale-wise.The construction period of the project is long.A high slope with a height difference of about 600 meters is formed on both sides of the dam abutment and the upper dangerous rock mass after excavation of the dam foundation.The relaxation of the foundation rock is related to the stability of the high slope and the subsequent foundation treatment measures.This paper analyzes the relaxation feature of rock and evaluates the stability of the dam abutment slope based on the wave velocity data of the rock mass in different periods,so as to provide reliable data for subsequent foundation treatment.

关 键 词：双江口水电站 大坝心墙 松弛特征 

分 类 号：TV74[水利工程—水利水电工程] TV698.23