Risk Assessment of Rockfall Hazards in a Tunnel Portal Section Based on Normal Cloud Model
Xin-tong Wang, Shucai Li, Xiu-yuan Ma, Yiguo Xue, Jie Hu, Ziqiang Li · Polish Journal of Environmental Studies · 2017
In recent years, increasing casualties and economic losses as a result of unexpected extreme environmental conditions have been noticed [1,2], and rockfall is one of the most serious geological hazards in mountain valleys, tunnels, and highways [3,4].Rockfall is a common type of rapidly moving landslide that greatly endangers the safety of tunnel construction [5][6][7].In southwestern China, many tunnels have been built under limited geological conditions.Moreover, rockfall is the most common cause of landslide catastrophes in mountain areas of Sichuan Province [8].Therefore, it is crucial to predict the