库水位变化条件下堆积体滑坡变形特征及稳定性分析

为研究库水位变化条件下堆积体滑坡的变形特征及稳定性,以三峡库区某典型堆积体滑坡为例,结合已有的监测资料,分析了变形与时间、变形与水位之间的变化规律,并采用FLAC二维数值模拟方法,建立了数值模型,分析了库水位变化条件下滑坡内的应力应变情况。结果表明,库区回水对滑坡的变形和稳定性影响巨大;二维数值计算的变形位移场与现场监测的位移基本吻合,说明数值计算可以较好地模拟库水位变化条件下的堆积体应力应变情况。

Deformation and Stability of Collapse and Gliding Landslide with Changes of Water Level

In order to study the deformation and stability of collapse and gliding landslide with the changes of water level, based on the typical landslides in Three Gorges Reservoir Area, combined with the existing monitoring data, the laws between the deformation and time, the deformation and water level were analyzed. And then a finite difference model was established by using FLAC two-dimensional numerical simulation method. Finally, the changes of stress and displacement were analyzed with the changes of water level inside the landslide. The results show that the stability of landslide deformation was affected by backwater in reservoir enormous; the consistency of the numerical deformation displacement field and the site monitoring displacement explained that the numerical calculation can simulate and analyze the stress and strain of the collapse and gliding under changes of reservoir water level well.