Abstract: West Sichuan is one of the areas in China, where the debris flows occur centrally and its harmfulness is much more than that of any other areas. According to the analysis of this material, which is obtained by means of field study and laboratory study in the main roads of this area, we can know the mechanism of debris flow formation and its scale, intensity, type as well as characteristics. There are two debris flow ditches in the county town-Hanyuanxian-of this area. Having investigated, measured and calculated, in this material we put forward some plan of the road leaping over ditch and some idea of bringing a ditch under control.

摘要： 川西是我国泥石流分布集中,危害较大地区。本文剖析了该区危害主要公路干线和县城的两条典型泥石流沟。通过大量的野外调查、量测、取样、室内分析计算资料,阐明论证了其形成机理,形成过程,以及规模、强度、类型、特征等。并提出了公路跨越方案和整治意见。