HAZARD WAYS OF LANDSLIDES AND AVALANCHES ON ROAD ENGINEERING IN SICHUAN-TIBET TRAFFIC CORRIDOR

This paper aims to provide a scientific decision and basis of disaster prevention and reduction for the line determination and safe construction and operation of road engineering in Sichuan-Tibet traffic corridor. By field survey and remote sensing interpretation on the landslides and avalanches along the proposed railway and highway of Sichuan-Tibet, we find out that the spatial distribution characteristics and potential hazard conditions of the hazards. Further, we systematically analyze and summarize the possible hazard ways of the hazards in the corridor in detail, combined with the existing research results of hazard characteristics and their hazard ways along the old Sichuan-Tibet roads. The research results show that there are totally 488 hazards in Kangding to Linzhi section of the corridor. They include 262 landslides and 226 collapses(including sand-sliding slope).148 hazards have potential hazards and threats on the proposed railway. They include 89 landslides and 59 collapses. The ways of the hazards on the road engineering are mainly summarized as follows.(1) Landslide and avalanches threaten tunnel and its import and export.(2) Landslide and avalanches advance, bury and destroy road engineering.(3) Landslide and avalanches threaten the safety of stations.(4) Landslide and avalanches block rivers and flooding road engineering.(5) Landslide and avalanches destroy road engineering by converting into hazard chains, such as debris flows and floods.(6) Avalanches and sand-sliding slopes impact, disturb and bury road engineering.