| 降雨条件下北川斜坡破坏的数值模拟 |
| |
| 引用本文： | 王淑云,叶天力,鲁晓兵,聂雪媛.降雨条件下北川斜坡破坏的数值模拟[J].中国地质灾害与防治学报,2014(2):43-48. |
| |
| 作者姓名： | 王淑云 叶天力 鲁晓兵 聂雪媛 |
| |
| 作者单位： | 中国科学院力学研究所流固耦合系统力学重点实验室,北京100190 |
| |
| 基金项目： | 国家基础研究计划“地震引起山地次生灾害的活动性和形成规律”（2008CB425802） |
| |
| 摘 要： | 本文采用FLAC的两相流模式和修正的Mohr—Coulomb模型，对北川地区震后土在降雨条件下的位移和速度矢量进行了数值模拟和分析，同时在室内进行了降雨条件下斜坡破坏的模型实验。分析结果表明：土体在沿坡面的最大水平位移发生在坡脚处，土体水平位移是衡量斜坡破坏的首要指标，可采用坡面特征点的位移突变作为斜坡破坏的判别标准；数值模拟得到的斜坡破坏与降雨历时关系与室内模型实验结果吻合较好。
|
| 关 键 词： | 降雨 斜坡破坏 启动 数值模拟 |
Numerical simulation of rainfall-induced slope failure debris flow in Beichuan |
| |
| WANG Shu-yun,YE Tian-li,LU Xiao-bing,NIE Xue-yuan.Numerical simulation of rainfall-induced slope failure debris flow in Beichuan[J].The Chinese Journal of Geological Hazard and Control,2014(2):43-48. |
| |
| Authors: | WANG Shu-yun YE Tian-li LU Xiao-bing NIE Xue-yuan |
| |
| Institution: | ( Key Laboratory for Mechanics in Fluid Solid Coupling Systems, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190,China) |
| |
| Abstract: | The displacement and velocity of Beichuan soil under rainfall conditions is numerically simulated by FLACin two-phase fluid and Mohr-Coulomb model, and then a series of model test about rainfall-induced slope failure areperformed in laboratory. It is shown that the maximum horizontal displacement occurs at the foot of the slope and thehorizontal displacement is the first indicator to measure the slope failure. Moreover, it is suggested that the slopefailure can be predicted by a sudden change of displacement at the characteristic point on the slope. There are a goodagreement between the simulation results and the model test data. |
| |
| Keywords: | rainfall slope failure initiation numerical simulation |
| 本文献已被 维普 等数据库收录！ |
