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-  2018 

一种边坡临界滑动面确定方法研究 Searching critical slide surface of slope based on velocity field analysis

Keywords: 临界滑动面,强度折减法,速率突变,边坡稳定性

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Abstract:

基于临界状态速度场的分析,提出了一种新的边坡临界状态滑动面确定方法.当坡体发生滑动时,滑动体内部各点的速率要显著大于稳定体内部各点的速率,因此,朝某个方向直线上的速率突变点即为滑动面与该直线的交点.首先通过强度折减法使边坡达到临界状态,得到边坡单元各个节点的临界状态速率场数据,然后沿竖直方向设置一系列等间距的水平线,并且在每条竖直线上布置离散点,采用插值形函数原理得到每个离散点的速率,找出每条水平线上的速率突变点,则可得到一系列表征滑动面位置的分布点,利用最小二乘法对这些分布点作平滑处理即可得到临界滑动面.最后,以一个均质边坡和一个非均质边坡为研究对象,将该方法与传统Bishop法做对比,验证了该方法的可靠性

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