基于颗粒流方法的滑坡灾变过程及冲击致灾预测研究  

Simulation on Landslide Disaster Process and Impact Disaster Prediction Based on PFC2D

作　　者：陈鑫 赵洲[1] 杨鹏 CHEN Xin;ZHAO Zhou;YANG Peng(College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,Shaanxi,China;Xi'an Institute of Geological and Mineral Exploration Co.,Ltd.,Xi'an 710100,Shaanxi,China;Xi'an Investigation Design and Research Institute of Chinese Nonferrous Metals Industry Co.,Ltd.,Xi'an 710054,Shaanxi,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]西安地质矿产勘查开发院有限公司,陕西西安710100 [3]中国有色金属工业西安勘察设计研究院有限公司,陕西西安710054

出　　处：《水力发电》2020年第4期35-40,共6页Water Power

基　　金：国家自然科学基金资助项目(41302276);西安科技大学博士(后)启动金联合资助项目(2015QDJ085)。

摘　　要：滑坡冲击致灾研究是滑坡风险评价的关键环节。以勉县老道寺镇楼子沟滑坡为研究对象,通过PFC2D双轴压缩试验获取岩土体细观力学参数,建立滑坡模型及冲击模型,模拟了滑坡灾变动力学全过程,对滑坡的运动位移、运动速度、冲击力等动力学指标进行了定量分析;根据力与变形关系,建立建筑物失效模型,对滑坡冲击致灾进行了定量化评价。研究认为,数值模拟方法可为同类滑坡运动过程分析提供参考,同时也为滑坡防灾减灾定量评估提供新思路。The study of landslide impact disaster is a key link of landslide risk assessment.Taking Louzigou Landslide in Laodaosi Town,Mianxian County as the research object,the meso-mechanical parameters of rock and soil are obtained by PFC2D biaxial compression test,and the landslide model and impact model are established to simulate the whole process of landslide catastrophe dynamics.The dynamic indexes such as movement displacement,motion velocity and impact force of landslide are quantitatively analyzed.The building failure model is established according to the relationship between force and deformation,and the disaster caused by landslide impact is evaluated quantitatively.The research suggests that the numerical simulation method can provide reference for the analysis of similar landslide motion processes,and also provide new ideas for quantitative assessment of landslide disaster prevention and mitigation.

关 键 词：滑坡 运动过程 冲击致灾 颗粒流方法 PFC2D 

分 类 号：P642[天文地球—工程地质学]