滑体失稳后运动过程三维弹簧变形块分析模型

doi:10.13722/j.cnki.jrme.2015.03.010

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Abstract Assessment of landslide hazards often requires good knowledge of the moving characteristics of landslides. However，the current analysis is mainly based on qualitative models，which are not suitable for quantitative analysis. To overcome this shortcoming，a three-dimensional model of spring-deformable-blocks was formulated to produce the motion of landslides. The motion of landslides was assumed continuous and variable，and the sliding body was divided into a number of deformable columns. With the force acting on the side face of columns，the deformation of the column was obtained according to the relationship of force-deformation of sliding body. The formulas for the acceleration，velocity and displacement of sliding body were established considering the accumulation and the release of the deformation energy. The proposed model was implemented in a program based on Visual Basic for the visualization of the motion of landslides. The program was applied to analyze the sliding time，the maximum velocity and the displacement of the sliding body of Jiweishan landslide in Wulong， Chongqing. The results from the simulation was found to be in good agreement with the existing numerical results.

Key words： slope engineering landslides run out process analysis spring-deformable-block model risk assessment

Received: 03 May 2014

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.03.010 OR http://www.rockmech.org/EN/Y2015/V34/I03/528

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