Abstract: The analysis theory of discrete PFC is introduced,and the calculating model is established on the base of cutting landslide of highway from Taiyuan to Dalian.The principle of particle flow code analysis method is introduced and applied to simulate a real case of a cutting landslide.The joints are formed using different property balls.The movement process of the landslide is calculated and forecasted and the deformation of the whole landslide,displacement and stress of various positions are analyzed.The slip of upside powder clay results from ripping within itself,while downside gravel slip results from retaining wall's destruction and the tense stress changes little.The 2 slide planes are pointed out and the suggestions for treatment are provided.

Key words: particle flow code (PFC), landslide, characteristic of movement

摘要： 介绍了颗粒离散元的分析原理,以太(原)-大(连)路堑滑坡为实例,构建了计算模型;各种属性不同的颗粒间划分出了节理。用此模型对该滑坡的运动过程进行了计算预测,对整体的变形、不同部位的位移和应力等运动特点进行了分析。结果表明,上部粉质黏土区系拉裂引起的下滑,下部碎石土区因挡墙损坏而产生滑动,拉应力变化不大;指出了在该滑坡存在2个滑动面,为治理工作提供了建议。

关键词: 颗粒流, 滑坡, 运动特点