Vol16 No.1: 122-137
【Title】Simulation of landslide run-out by considering frictional heating and thermal pressurization
【Author】LIU Wei1,2; HE Si-ming1,2,3*; HE Zi-lu4
【Addresses】1 Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Science, Chengdu 610041, China; 2 Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 3 CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 10010, China; 4 Department of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu 611756, China
【Corresponding author】HE Si-ming
【Citation】Liu W, He SM, He ZL (2019) Simulation of landslide run-out by considering frictional heating and thermal pressurization. Journal of Mountain Science 16(1). https://doi.org/10.1007/s11629-018-5012-4
【Abstract】Some of the remarkable characteristics of natural landslides, such as surprisingly long travel distances and high velocities, have been attributed to the mechanisms of frictional heating and thermal pressurization. In this work, this mechanism is combined with a depth-averaged model to simulate the long runout of landslides in the condition of deformation. Some important factors that influence frictional heating and thermal pressurization within the shear zone are further considered, including velocity profile and pressurization coefficient. In order to solve the coupled equations, a combined computational method based on the finite volume method and quadratic upwind interpolation for convective kinematics scheme is proposed. Several numerical tests are performed to demonstrate the feasibility of the computational scheme, the influence of thermal pressurization on landslide run-out, and the potential of the model to simulate an actual landslide.
【Keywords】Landslide; Frictional heating; Thermal pressurization; Numerical simulation