岩土力学2012，Vol.33Issue(5)：1527-1534,1541,9.
基底刮铲效应对岩石碎屑流停积过程的影响
Influence of substrate ploughing and erosion effect on process of rock avalanche
摘要
Abstract
The substrate of rock avalanche bears severe ploughing and erosion effect during the depositing process of rock avalanche. Firstly, characteristics of the substrate-ploughing and esrosion are described and compared with each other. Then the calibration and verification of particle flow method are carried out, and multiple numerical rock avalanche depositing tests based on this method are done. Test results reveal that both the substrate ploughing and esrosion effect can enhance the runout ability of rock avalanche moving on a horizontal substrate. The influence of substrate materials are also studied by doing numerical tests. The results indicate that smaller strength of the substrate materials leads to more intensive ploughing and erosion effect, however, it seems that, the characterstic of lower strength and lower density of the substrate's surface material is the key factor of enlarging the runout ability of rock avalanche, this fragile layer serves as lubricant in the base; in contrast, the strength of the underlying substrate material gives no contribution on the avalanche's runout ability.关键词
岩石碎屑流/停积过程/刮铲效应/二维颗粒离散元方法Key words
rock avalanche/ depositing process/ substrate ploughing and erosion/ two-dimentional particle flow method分类
建筑与水利引用本文复制引用
李祥龙,唐辉明,熊承仁,罗红明..基底刮铲效应对岩石碎屑流停积过程的影响[J].岩土力学,2012,33(5):1527-1534,1541,9.基金项目
中国地质调查局项目——高速远程滑坡形成机制研究(No.1212011014030). （No.1212011014030）
