堆积层滑坡垂直位移方向率的数值模拟研究

以长江三峡库区巴东县境内的黄腊石滑坡工程实例为背景，运用大型有限元软件FLAC3D进行数值模拟，引入能反映滑坡位移方向改变的特征参数-滑坡垂直位移方向率作为滑坡稳定状态的评价参数，研究在边坡稳定演化过程中垂直位移方向率时空变化特征，发现了滑坡垂直位移方向率由稳定时的恒定值到失稳时的突然增大或减小的突变规律，得出边坡垂直位移方向率可以作为边坡稳定状态的预测判据。

Study on Numerical Simulation of the Directional Rate of Vertical Displacement in Landslide of Colluvial Layer

Based on the monitoring data of displacements resulted from the H uanglashi landslide, this paper completed a study on the change characters of time and space in directional rate of vertical displacement in the process of slope stability evolution by means of the large-scale finite element software F1AC3D and the eigen parameter-directional rate of vertical displacement which reflected the change of slope displacement direction was introduced as the parameter of evaluating the slope stability state. We found that the directional rate of vertical displacement had an anomal regulation from the constant value in stable stage to sudden increase or decrease of values in unstable stage. The conclusion is that the directional rate of the vertical displacement can be used for the criterion of predicting the slope stability.