锦屏一级水电站左岸边坡变形对拱坝安全的影响  

Effect of left abutment slope deformation on arch dam safety of Jinping Ⅰ Hydropower Station

作　　者：周钟[1] 张敬[1] 薛利军[1] 

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都610072

出　　处：《人民长江》2017年第2期49-54,共6页Yangtze River

摘　　要：依据锦屏一级水电站拱坝边坡监测成果,采用流变计算模型,预测了左岸边坡的长期变形趋势和稳定性。分析了大坝和边坡相互作用下有限元模型边界上的位移加载方式,并进一步分析边坡长期变形下拱坝的应力和变形情况,评价了边坡长期变形对拱坝结构的影响。分析表明,锦屏一级水电站拱坝能够承受一定量值的左岸边坡变形,且承受边坡变形的安全裕度较高。On the base of abutment slope monitoring data of Jinping Ⅰ Hydropower Station,the abutment slope long- term deformation tendency and stability are forecasted by using visco- elastic- plastic model. The displacement loading on the boundary of finite element model under dam and slope interaction is discussed,and the dam deformation and stress conditions under long-term slope deformation are analyzed to evaluate the influence of slope deformation on dam structure. The analysis of arch dam overloading capacity under long- term slope deformation is carried out to assess the dam safety margin. The results show that Jinping Ⅰ Hydropower Station arch dam could withstand a certain range of left slope deformation,and the arch dam is characterized as a higher safety margin to slope deformation.

关 键 词：边坡长期变形 整体安全度 相互作用 高拱坝 

分 类 号：P642[天文地球—工程地质学]