CHARACTERISTICS OF GEOLOGICAL HAZARDS IN BAZHOU REGION OF SICHUAN PROVINCE AFTER WENCHUAN EARTHQUAKE

This paper presents the results of site investigation on the influence of the 512 Wenchuan Earthquake on the geological hazards in Bazhou region of Sichuan province.The paper considers that the geological structure and landform are the fundamental factors that control the geological hazards in this region. The rainfall is the most important one among the geological hazard inducing factors. The site investigation reveals that collapses and landslides are the main types of geological hazards. The main form of collapses in this region is rock fall and the main form of landslides is eluvium landslide. Both of them distribute on low-mid mountain regions with the eroded landforms that are so-called rock desks. The analysis shows that the earthquake has greatly weakened the stability of potential collapse rock slopes.