摘要
西部某大型水电站左岸边坡开挖高度高、规模大、稳定条件差,高边坡的安全稳定问题十分突出,进入运行期后部分区域变形仍未收敛,需持续关注边坡的变形和稳定性。通过对左岸边坡长周期的表面变形监测、浅部变形监测与深部变形监测成果对比分析。研究结果表明,除开口线以上高位倾倒变形区外,左岸边坡表面变形平稳,浅层岩体变形趋于收敛,深部变形趋于稳定。左岸边坡深部变形主要受深部裂缝区持续张拉变形、f42-9断层和煌斑岩脉等不良地质影响,整体处于可控范围内。研究分析思路可供其他类似高边坡工程参考、借鉴。
The left bank slope of a large hydropower station in the West has high excavation height,large scale and poor stability conditions.The problem of safety and stability of the high slope is very prominent.After entering the operation period,the deformation of some areas has not converged.It is necessary to continually pay attention to the deformation and stability of the slope.Through the comparative analysis of the results of long-term surface deformation monitoring,shallow deformation monitoring and deep deformation monitoring of the left bank slope.The results show that except for the high dumping deformation area above the opening line,the surface deformation of the left bank slope is stable,the deformation of the shallow rock mass tends to converge,and the deep deformation tends to be stable.The slope in the high-level dumping deformation area above the opening line is still undergoing deformation adjustment and continuous dumping.The deep deformation of the left bank slope is mainly affected by the continuous tension deformation in the deep fracture area,f42-9 fault and lamprophyre vein,which is within the controllable range as a whole.The research and analysis ideas can be used as a reference for other similar high slope projects.
作者
卢为伟
张凯
Lu Weiwei;Zhang Kai(PowerChina Zhongnan Engineering Corporation Ltd.,Changsha410014,China)
出处
《吉林水利》
2022年第6期27-31,40,共6页
Jilin Water Resources
关键词
边坡稳定性
水电站
左岸边坡
分析
收敛
slope stability
hydropower station
Left bank slope
analysis
convergence
