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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。
In order to study the deformation characteristics and stability of landslides of reservoir landslides under the condition of reservoir water level changes, taking a typical reservoir landslide in the Three Gorges Reservoir as an example, with the existing monitoring data, the variation rules between deformation and time, deformation and water level are analyzed The numerical model is established by FLAC two-dimensional numerical simulation method. The stress and strain in the landslide under the condition of reservoir water level changes are analyzed. The results show that the backwater in the reservoir area has a great influence on the deformation and stability of the landslide. The deformation and displacement fields calculated by two-dimensional numerical simulation are in good agreement with the on-site monitoring displacements, indicating that the numerical calculation can better simulate the stress of the accumulations under reservoir water level changes Strain situation.