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Alternative TitleMPM-based Numerical Analysis of the Kinematic Characteristics of Xinmo landslide in Maoxian County,Sichuan,China
谢艳芳1,2; 李新坡2,3; 赵曙熙1,2; 刘洋1,2; 徐骏4
Source Publication山地学报
Contribution Rank2
Other AbstractOn June 24,2017,a tremendous debris flow disaster occurred in Xinmo village,Diexi town,Maoxian county,Sichuan province,China. Approximately 2.87 * 10~6 m~3 rock mass collapsed and the debris buried Xinmo Village,causing a large number of casualties and damages to houses. On the issue of the characteristics and formation mechanism of the landslide,relevant scholars have obtained certain research results in their researches. However,scientific comprehension is relatively lacking about dynamic processes and characteristics of this landslide. This paper introduced two-dimensional material point method (MPM),which combines the advantages of Langrangian and Eulerian algorithm,and is applicable to simulate mechanics with large deformation,to clarify this phenomenon. In the MPM simulation,the kinematic processes of the landslide were revealed through the analysis of time evolution of motion,velocity profile and contour of effective plastic strain. The overall duration time of motion and travelling distance were consistent with reality. Moreover,the results of simulation also suggested that rock mass moved as a whole at startup stage,and then translated into debris flow soon as the result of intense collision. In addition,the results can further reveal the process of debris flow collision and scraper erosion by comparing the slope morphology,the equivalent plastic strain development trend and the energy time history curve on the same position at different times. It showed that two-thirds of gravitational potential energy exhausted in the above processes,which revealed the energy dissipation capacity of collision and erosion. According to crushing collapse dilatancy and entrainment in travelling,the final volume of debris flow was far more than the initial rock mass. Furthermore,slide velocity obtained from numerical computation was basically consistent with the results calculated by the method of Scheidegger. It can be seen that the simulation results provide comprehensive information on the initiation and the dynamic evolution of the landslide.
Keyword碎屑流 动力特性 物质点法 新磨村滑坡
Indexed ByCSCD
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Document Type期刊论文
Corresponding Author李新坡
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
谢艳芳,李新坡,赵曙熙,等. 基于物质点法的新磨村滑坡动力特性分析[J]. 山地学报,2018,36(4):589-597.
APA 谢艳芳,李新坡,赵曙熙,刘洋,&徐骏.(2018).基于物质点法的新磨村滑坡动力特性分析.山地学报,36(4),589-597.
MLA 谢艳芳,et al."基于物质点法的新磨村滑坡动力特性分析".山地学报 36.4(2018):589-597.
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