锦屏一级高拱坝坝肩刚体弹簧元动力抗滑稳定分析  

Rigid Body Spring Element Method for Dynamic Anti-sliding Analysis of Jinping I Arch Dam Abutment

作　　者：黄志刚[1] 周钟 张建海[1] 吴玉龙[1] 薛利君 

机构地区：[1]四川大学水利水电学院水力学及山区河流开发与保护国家重点实验室,四川成都610065 [2]中国电建成都勘察设计研究院有限公司,四川成都610072

出　　处：《西南科技大学学报》2015年第4期93-99,共7页Journal of Southwest University of Science and Technology

摘　　要：锦屏一级水电站地质条件复杂:拱坝右岸由特定结构面f13断层、f14断层及SN向裂隙参与形成了7个控制滑块;左岸为反向坡,存在煌斑岩脉、f2断层、f5断层、f8断层、f42-9断层且左岸坝肩松弛严重,左岸坝肩稳定是关键性的技术问题。利用刚体弹簧元法对锦屏一级高拱坝左、右岸坝肩控制滑移块体进行了地震动力稳定分析。通过计算分析,左岸最小动安全系数出现在L5滑块且其Kd为1.434,右岸最小动安全系数出现在R4-3滑块且其Kd为2.166,拱坝的坝肩抗滑动安全系数均在合理范围内,其左右岸坝肩均能满足稳定性要求。Jinping I Hydropower Station is in complex geological conditions. Investigation showes that the controlling blocks of the right bank of the arch dam are formed by specific structural plane f13 fault,f14 fault and the crack of SN orientation,while the slope of the left bank is reverse with lamprophyre veins,f2,f5,f8,f42- 9 faults. In addition,the left bank abutment is highly relaxed. All of this make the abutment stability of left bank to be a critical technical problem. The rock faults and discontinuous deformation characteristics can be expediently simulated by using the rigid body- spring element method,and then the analysis of the seismic dynamic stability for the controlling sliding block of the left and the right abutment can be performed. Through calculation and analysis,the minimum dynamic safety coefficient（ Kd） of left bank appears in the L5 slider and the value is 1. 434; the right bank is R4- 3 slider and its value is 2. 166. All safety coefficients of arch dam abutment sliders are reasonable and all the abutments can satisfy the stability requirement.

关 键 词：拱坝 刚体弹簧元 控制滑块 地震动力分析 

分 类 号：TV642.4[水利工程—水利水电工程]