锦屏一级水电站IV～VI山梁雾化边坡稳定性分析  

STUDY ON STABILITY OF WATER-FOG SLOPE ON IV–VI RIDGES OF JINPING FIRST STAGE HYDROPOWER STATION

作　　者：刘明[1] 黄润秋[1] 严明[1] 

机构地区：[1]成都理工大学地质灾害防治国家专业实验室,四川成都610059

出　　处：《岩石力学与工程学报》2006年第z1期2801-2807,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金"雅砻江水电开发"联合研究基金重点项目资助(50539050);成都理工大学地质灾害防治与地质环境保护国家专业实验室开放基金资助项目(GZ2005-07)

摘　　要：针对锦屏一级水电站左岸IV～VI梁部位岸坡“深部裂缝”发育、坡脚阻抗段岩体单薄等结构特点,分析岸坡潜在失稳的边界条件及变形破坏模式。基于多个水电工程边坡雾化失稳实例的启示,从雾化降水对岸坡岩体的作用机制入手,指出雾化对该段岸坡稳定性影响的关键是深部裂缝充水及坡体饱水。据此,按坡内不同水位对稳定性系数的影响进行初步的敏感性分析。分析结果表明:在泄洪雾化情况下,IV～VI梁边坡稳定性问题较为突出,不能满足工程边坡安全稳定要求,应加强相应的工程处理。Aimed at the structure characteristics of the slope at the IV–VI ridges on the left bank of the Yalongjiang River in Jinping First Stage Hydropower Station,such as the existence of deep fractures in the slope and the thin anti-sliding rock masses at the toe of slope,it is found that the possible boundary conditions,which control the underlying slope deformation or failure,may be comprised of the fault f9 and the larger deep fractures(SL15,SL13,etc.).Then the deformation and failure mode of the slope is indicated.Subsequently,based on the examples of slope instability induced by atomized rain in several hydroelectric projects,it shows that the key point,which is one of the basic ways having influences on the slope instability by the flood discharge,is the filled water in deep fractures,from which the saturation in slope will gradually arise.With the sensitiveness analysis of the static stability coefficients in the ultimate equilibrium state under the different water level conditions in the slope,the elementary results indicate that the slope stability problems will be comparatively serious.And the stability coefficients most possibly be difficult to satisfy the stability demands of the engineering slope design in the IV–VI ridge positions when the flood is discharged.So the corresponding engineering treatment measures must be adopted.

关 键 词：水利工程 蠕滑-剪断 泄洪雾化 深部裂缝 敏感性分析 

分 类 号：TV223.3[水利工程—水工结构工程] TV698.2+32