考虑水位变化的江西万安水库库岸边坡稳定性分析  

Stability Analysis of Bank Slope of Wan’an Reservoir in Jiangxi Considering Water Level Changes

作　　者：占晨 ZHAN Chen(Shangrao Kexin Soil and Water Conservation Monitoring Co.,Ltd.,Shangrao 334000,China)

机构地区：[1]上饶市科信水土保持监测有限公司,江西上饶334000

出　　处：《中国水能及电气化》2024年第11期30-35,共6页China Water Power & Electrification

摘　　要：库岸边坡稳定性与水库水位变化关联紧密,文章以江西万安水库库岸边坡在水位变化条件下的滑坡体为研究对象,针对主要滑坡剖面,结合Slide数值模拟技术与基于传感光纤应变分布的IFOST现场监测数据,对水位变化引起的滑坡体失稳特征进行分析。结果表明:水库水位的上升会导致边坡的安全系数显著降低,且不考虑坡脚软化的边坡安全系数大于考虑坡脚软化的边坡安全系数,两者之差最大为0.157;在对边坡0~40m范围内的应变进行监测时发现,35m处的应变峰值和宽度最大,说明滑坡体在深度较大以及边界的位置更不稳定。基于传感光纤应变分布的IFOST边坡监测系统,对库岸边坡进行预警、变形模式识别以及稳定性分析十分有效。The stability of the reservoir bank slope is closely related to changes in reservoir water level.This paper takes the landslide body of the Wan’an Reservoir bank slope in Jiangxi as the research object under varying water level conditions.Based on the main landslide profiles,combined with Slide numerical simulation technology and IFOST on-site monitoring data based on sensing fiber strain distribution,the characteristics of landslide instability caused by water level changes are analyzed.The results show that the rise in reservoir water levels significantly reduces the slope safety factor,and the safety factor of the slope without considering toe softening is greater than that when toe softening is considered,with the maximum difference being 0.157.When monitoring strain within the 0~40m range of the slope,it was found that the strain peak and width at the 35m mark were the largest,indicating that the landslide body is less stable at greater depths and at boundary locations.The IFOST slope monitoring system based on the strain distribution of sensing optical fiber is very effective for early warning,deformation pattern recognition and stability analysis of the reservoir bank slope.

关 键 词：水位变化 库岸边坡 稳定性分析 

分 类 号：TV861[水利工程—水利水电工程]