基于有限体积法的滑坡–碎屑流三维运动过程模拟分析

doi:10.13722/j.cnki.jrme.2015.03.005

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Abstract Because of super mobility，high velocity and enormous energy，the landslide-debris flow is a kind of geological disaster with extreme destructive power. In order to simulate three-dimensional movement of landslide-debris flow，a simulation model considering the erosion effect and the change of friction resistance at the bottom of landslide was established in the paper based on the local Lagrange coordinate system and the finite volume method. The simulation model was validated with the example of El Picacho landslide using the parameters of distance erosion rate and Voellmy model. The results of simulation showed that the runout path and distance agreed with the field data of measurement，which indicated the effectiveness of the proposed model. Besides，the simulation without erosion effect was carried out. It is indicated that the total volume of sliding mass was decreased and the runout distance was shortened，which indicating that the erosion effect at the bottom of landslide was an important factor for the movement of landslide-debris flow.

Key words： slope engineering landslide-debris flow three-dimensional movement process numerical simulation finite volume method

Received: 25 February 2014

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.03.005 OR https://rockmech.whrsm.ac.cn/EN/Y2015/V34/I3/480

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