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我国山区地质地貌条件复杂,有利于灾害的形成,道路沿线泥石流滑坡广泛分布,活动频繁,危害严重。从道路展线和路基条件等方面,分析了山区道路特别是沿河道路的易损性;通过分析以往泥石流滑坡对公路、铁路的危害实例,总结出山区道路泥石流滑坡的危害方式,主要有危害路基路面、冲毁道路桥梁、淤埋道路设施、弯道超高和漫流改道、阻塞河道引发次生灾害等;分析了道路泥石流滑坡的活动特征,发现道路泥石流滑坡的分布规律主要表现为地带性、集中性、地段性和坡向差异性。这种认识能为山区道路工程建设和山区交通安全保障,提供减灾的背景资料和科学依据。
The geological conditions of mountainous areas in our country are complex and are conducive to the formation of disasters. Debris flow landslides along the road are widely distributed with frequent activities and serious harms. From the aspects of road route and subgrade conditions, the vulnerability of road in mountainous area, especially the road along the river, is analyzed. By analyzing the hazard of landslide to the road and railway in the past, the ways of landslide hazard of mountainous road are summarized, Roadbed and pavement, the road and bridge to be destroyed, the road facilities buried, the high bend and the diversion and the secondary disasters caused by the blockage of the river channel. The characteristics of debris flow landslide on the road were analyzed. The distribution of debris flow landslides on the road was mainly zonal Concentration, fragmentation and aspect differences. This understanding can provide the background information and scientific basis for disaster reduction for mountain road construction and mountain traffic safety.