摘要
以澜沧江上游苗尾水电站某倾倒变形岸坡为例,对研究区工程地质概况、库区岸坡结构特征以及水库蓄水影响特征进行详细分析,发现库区边坡的稳定性在水库蓄水和运营过程中受到水位变化的影响较大。借助UDEC离散元软件对该倾倒变形体进行数值模拟分析,认为在水库蓄水后,岩体强度明显降低,破坏模式由滑动破坏变为崩塌破坏,但边坡应力场变化不大。最后以二维极限平衡计算的边坡稳定性结果作参考,与有限元计算结果相符。
Taking a toppling deformed bank slope of the Miaowei hydropower station in the upstream Lancang River as an example, carried out detailed analysis of study area engineering geological general situation, reservoir bank slope structural features and reservoir impoundment impact features. The analysis has found that the stability of reservoir bank slope has suffered greater impact from water-level fluctuation under reservoir impoundment and operating procedures. With support of the UDEC software carried out numerical simulation of the toppling deformed mass, considered that the rock mass strength obviously lowered down, failure mode has changed from slide failure into collapse failure, but slope stress field changed not large. Finally found that the results from 2D limit equilibrium method and the UDEC are consistent.
作者
许泽舟
李雨坤
Xu Zezhou;Li Yukun(School of Earth Sciences and Engineering, Hohai University, Nanjing, Jiangsu 211100)
出处
《中国煤炭地质》
2019年第5期36-41,共6页
Coal Geology of China
基金
华能澜沧江科研项目(20158101216)
关键词
倾倒变形
库区岸坡
蓄水工况
UDEC
toppling deformation
reservoir bank slope
impoundment mode
UDEC
