摘要
乌东德水电站大坝为300m级超高薄拱坝,为有利于大坝混凝土温度控制,选用线膨胀系数较小的施期料场灰岩骨料。施期料场高程990m以上为灰岩,990m至终采高程850m为白云岩。料场边坡呈三面边坡,正面坡为横向坡,上游坡为顺向坡,下游坡为反向坡,边坡最大高度290m。采用FLAC3D和强度折减法对料场边坡稳定性进行数值分析,计算结果表明料场开挖和支护边坡安全系数高,稳定性好。提出了料场边坡的支护设计,目前料场已全部开挖支护完成,监测数据表明边坡整体稳定。
The dam of Wudongde Hydropower Station is 300 m super-thin arch dam.In order to facilitate temperature control of dam concrete,limestone aggregate with small coefficient of linear expansion is selected.Limestone is above 990m in Shiqi Material Yard and dolomite is between 990m and 850m in final mining.The slope of the material yard is a three-sided slope,the front slope is a transverse slope,the upstream slope is a forward slope,the downstream slope is a reverse slope,and the maximum height of the slope is 290m.FLAC3D and strength reduction method are used to carry out numerical analysis on slope stability of material yard.The calculation results show that excavation and support slope of material yard has high safety factor and good stability.In this paper,the support design of slope in material yard is proposed.At present,all excavation and support of the material yard have been completed.Monitoring data show that the slope is stable as a whole.
作者
高昂
刘盟盟
刘晓军
王媛媛
GAO Ang;LIU Meng-meng;LIU Xiao-jun;WANG Yuan-yuan(Changjiang Institute of Survey,Planning,Design and Research,Wuhan 430010,China)
出处
《云南水力发电》
2022年第11期148-152,共5页
Yunnan Water Power
基金
长江设计集团自主创新项目(CX2020Z10)。
关键词
料场
高边坡
强度折减法
开挖与支护
material yard
high slope
strength reduction method
excavation and support
