Abstract: Debris flow is a kind of high indicator compound l iq uid composed of water,sand and little rock,which is the movement of solid and li quid whose particles have great difference in size.In the debris flows movemen t sand and little rock mainly move in rolling and leaping.Debris flow is a short stage phenomena for a short time in the course of the valleys radical evoluti on,and its a typical calamity course.Based on explorations in-situ spot and d eeply researches,the author analyzed the the basic characters of the highways debr is flows,also proposed the debris flows startup conditions and types.

Key words: debris flow, character, startup, mechanism

摘要： 泥石流是一种高浓度的水、沙、砾混合流,是颗粒大小差异很大的固体和液体的联合运动,其中砂、砾主要按滚动及跃进状态迁移,是沟谷急剧演变的一个短历时的阶段性现象,属于典型的灾害地貌过程.基于实地考察和深入的研究,笔者分析了公路泥石流的基本特征,并分析提出了泥石流的启动条件、类型及其相应的机理

关键词: 泥石流, 特征, 启动, 机理