Influencing factors of landslides and rockfalls along the Jinchuan-Xiaojin highway in Sichuan

Geological hazards in plateau mountainous areas are the greatest hazards to traffic lines, and the key to effectively avoid risks is to grasp the engineering geological factors and inducing factors of geological hazards along the high way. Based on the geographical, geological, meteorological, remote sensing and field investigation, the paper systematically studies the influencing factors of the landslide and collapse in the belt area along the Jinxiao Highway in the plateau of Aba Prefecture in western Sichuan. The results indicate that: (1)the cleavage transformation of the carbonaceous mudstone, silty mudstone and siltstone in the zone, as well as The Himalayan period tectonic movement and frequent seismic activity intensified the fracture of rock mass, provided the material source for the landslide and collapse in the area and created favorable conditions for shaping the topography of the alpine valley; (2)concentrated rainfall in the region from June to September is the main factor triggering landslides and collapses; (3)high mountains, valleys, high-angle slopes and other terrain and geomorphology background and slope foot excavation are also an important factor that triggeringcollapse, landslides;(4)seasonal freezing-thawing accelerates the bedrock weathering failure and promotes the formation of landslides and rockfalls.