Analysis of Development Characteristics of Youyiqiao Landslide along China-Nepal Highway
ZHANG Xiao-gang,QIANG Ba (Institute of Mountain Hazards and Environment, CAS, Chengdu 610041 China; Tibet Traffic Institute , Lhasa 850000 China)
Youyiqiao landslide is located at the last section which is the region between Zhangmu and Youyiqiao along China-Nepal Highway in China. Youyiqiao landslide endangers severely highway especially during rainy season every year and influents the development of port passage. Based on the analysis of landform, structure of land body and stability of slope, it can draw a conclusion that Youyiqiao landslide is a giant ancient landslide. After the first landslide activities, the slope has occurred repeated second-sliding. Youyiqiao landslide is a modern landslide which is of the characteristics of multiphase, multilayer, multistripe, multipart, multigrade.