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。
Abstract
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 insufficient. 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
Key words
dominant joints extending outward along the slope /
Wudongde hydropower station /
high slope /
connectivity rate /
stability /
bandwidth
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] 邵 兵,徐 青,邬爱清. 复杂水工边坡稳定性研究方法探讨[J].raybet体育在线
院报,2013,30(7):69-74. (SHAO Bing, XU Qing, WU Ai-qing. Research on Methods of Stability Analysis of Complex Hydraulic Slopes[J]. Journal of Yangtze River Scientific Research Institute, 2013,30 (7):69-74.(in Chinese))
[2] 段永伟,胡修文,吁 燃,等. 顺层岩质边坡稳定性极限平衡分析方法比较研究[J]. raybet体育在线
院报, 2013,30 (12): 65-68. (DUAN Yong-wei, HU Xiu-wen, YU Ran, et al. Comparative Study on Limit Equilibrium Methods for Stability Analysis of Bedding Rock Slope[J]. Journal of Yangtze River Scientific Research Institute, 2013,30 (12): 65-68 .(in Chinese))
[3] 肖建勋,程远帆,王利丰. 岩体结构面连通率研究进展及应用[J]. 地下空间与工程学报, 2006,2(2): 325-334 (XIAO Jian-xun,CHENG Yuan-fan, WANG Li-feng. Development of Research of Connectivity Rate of Discontinuities in Rock Mass and Application[J].Chinese Journal of Underground Space and Engineering, 2006,2(2): 325-334 .(in Chinese))
[4] 胡耀飞,张 勇,靳晓光, 基于现场实测的缓倾硬性结构面连通率统计[J].水文地质工程地质, 2011,38(4): 78-81 (HU Yao-fei,ZHANG Yong,JIN Xiao-guang, Statistics of gentle angle rigid structural plane persistence ratio, 2011,38(4): 78-81 .(in Chinese))
PDF(1320 KB)
