顺坡向外倾优势裂隙连通率对高边坡稳定性影响分析  

Effect of Connectivity Rate of Dominant Joints Extending Outward of the Slope on High Slope Stability

作　　者：刘冲平[1] 郝文忠[1] 王吉亮[1] 白伟[1] 覃振华[1] 李志[1] 

机构地区：[1]长江三峡勘测研究院有限公司,武汉430074

出　　处：《长江科学院院报》2014年第12期74-77,共4页Journal of Changjiang River Scientific Research Institute

摘　　要：顺坡向外倾优势裂隙控制的岩质高边坡,其连通率对边坡整体稳定性起到重要作用,但目前关于裂隙连通率对边坡稳定性影响敏感程度研究尚较少。为此,针对金沙江乌东德水电站高达180 m的进水口岩质边坡,采用定性与定量相结合的分析方法,通过对顺坡向外倾裂隙连通率统计,及其与岩桥组合的"底滑面"参数加权平均,采取刚体极限平衡法计算边坡稳定系数。通过连通率敏感性分析计算,论证了裂隙连通率对该类边坡稳定性的影响程度以及在统计线连通率带宽投影法中,带宽的选取对连通率和稳定系数的影响程度。The connectivity rate of dominant joints which extend outward along high rock slope plays an important role in the slope＇ s overall stability, but research on the sensitivity of slope stability to connectivity rate is insuffi- cient. In view of this, qualitative and quantitative methods were employed to research the high rock slope （180m） at the water inlet of Wudongde hydropower station at Jinsha River. On the basis of connectivity rate statistics and the weighted average parameters of the ＂bottom sliding surface＂ combined with rock bridge, the stability factor of slope was calculated by using rigid limit equilibrium method. The degrees of connectivity rate＇ s influence on slope stability were obtained. Moreover, in the statistics using bandwidth projection method, the selection of bandwidth also has big influence on the connectivity rate and the stability factors.

关 键 词：顺坡向外倾优势裂隙 乌东德水电站 高边坡 连通率 稳定性 带宽 

分 类 号：TV223[水利工程—水工结构工程]