冲淤变动型泥石流沟中物质启动 类型及机理研究(Ⅰ)

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.，Debris flow is a kind of high indicator compound liquid composed of water, sand and little rock, which is the movement of solid and liquid whose particles have great difference in size. In the debris flow's movement 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 evolution, and it's a typical calamity course. Based on explorations in-situ spot and deeply researches, the author analyzed the basic characters of the highways' debris flows, also proposed the debris flows' startup conditions and types.，