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根据巴东县张家屋滑坡的地表位移变化,分析三峡库区高水位运行下,降雨为该滑坡变形的主要影响因素,进一步根据深部(滑带)位移与降雨量的相关性,得出滑带土变形较降雨有一定的滞后性,且滞后时间由后至前逐渐增大,表现出滑带变形由后缘向前缘传递的特征,揭示了渐进推移式滑坡的变形特点,并利用FLAC数值软件模拟了该滑坡在滑体重度逐渐饱和下位移的变化过程,结果与实际变形传递特征一致。
According to the change of surface displacement of Zhangjiawu landslide in Badong County, it is analyzed that the rainfall is the main influencing factor of the landslide deformation under the high water level operation in the Three Gorges Reservoir Area. Based on the correlation between the displacement of the deep (slip) and rainfall, The deformation of soil is more lag than that of rainfall, and the lag time gradually increases from the back to the front, which shows that the deformation of the sliding belt is transmitted from the trailing edge to the leading edge, and the deformation characteristics of the progressive sliding landslide are revealed. The software simulates the process of the landslide displacement under the gradual saturation of the sliding body. The result is consistent with the actual deformation transfer characteristics.