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投稿时间：2012-12-11 修订日期：2013-04-01
投稿时间：2012-12-11 修订日期：2013-04-01
中文摘要: 大多数岩土体崩滑后形成由粗颗粒和粘性填隙介质组成的粘性崩滑体。填隙介质粘性对崩滑土体运动过程的影响少有人探讨。为分析粘性填隙介质对运动过程的影响，利用MCR301，测定容重为1.360g/cm3成都粘土法向粘连力和切向剪切抗力。利用PFC3D构建崩滑土体运动数值模型，并将崩滑土体试样划分为5个部位，用设定颗粒代表崩滑土体不同部位。通过对比分析颗粒间切向、法向粘连强度为200Pa和无粘情况下，不同部位颗粒位置、速度随时步演化过程，分析结果表明：粘连强度改变崩滑土体启动运动模式，在200Pa为推移式启动模式，无粘情况下为溜滑启动模式；粘性条件下颗粒峰值速度较无粘条件下小，而碰撞频率较无粘条件下高，速度波动幅度大。
Abstract: Most landslide and collapse formed viscous landslip-collapse soil composed of coarse particle and viscous gap filling. The influence of gap filling viscosity to the motion of landslip-collapse soil was few discussed. In order to analyze the influence of it, the normal-force and tangential-force of the certain density（1.360g/cm3） Chengdu clay were admeasured through experiments by MCR-301 Rheometer. Using the PFC3D, the numerical model of landslip-collapse soil was constructed and divided five parts. Every specific particle represents different parts of landslip-collapse soil. Through compared analysis of motion process about different parts particles under set normal and tangential bond strengths (0 Pa, 200Pa), the results showed, the starting forms of landslip-collapse soil was push type when the bond strength was set to 200Pa, but was skid type when the bond strength was 0 Pa. The peak velocity of particle at 200 Pa was smaller, while the collision frequency and velocity fluctuation amplitude were higher than the values at 0 Pa.
文章编号：201201033 中图分类号： 文献标志码：
基金项目:国家自然科学基金项目:南水北调西线一期工程区山地表层灾变过程与机理研究(No：40830742 )；泥石流沟道侵蚀实验研究（No：50979103）;泥石流坝后坑侵蚀实验研究（No:40901007）。
| 作者 | 单位 | |
| 季宪军 | 中国科学院山地灾害与环境研究所 | jifeng988@163.com |
| 欧国强* | 中国科学院山地灾害与环境研究所 | ougq@imde.ac.cn |
| 杨顺 | 中国科学院山地灾害与环境研究所 | |
| 王钧 | 中国科学院山地灾害与环境研究所 | |
| 陆桂红 | 中国科学院山地灾害与环境研究所 |
| Author Name | Affiliation | |
| Ji Xian-Jun | jifeng988@163.com | |
| Ou Guoqiang | Institute of Mountain Hazards and Environment, CAS | ougq@imde.ac.cn |
作者简介:
引用文本：
季宪军,欧国强,杨顺,王钧,陆桂红.基于PFC3D粘性与无粘崩滑土体运动过程对比分析(研究生论坛)[J].工程科学与技术,2013,45(Z1):67-73.
Ji Xian-Jun,Ou Guoqiang.Comparison Analysis of the Motion Process about Viscous and No-viscous Landslip-collapse Soil based on PFC3D[J].Advanced Engineering Sciences,2013,45(Z1):67-73.
引用文本：
季宪军,欧国强,杨顺,王钧,陆桂红.基于PFC3D粘性与无粘崩滑土体运动过程对比分析(研究生论坛)[J].工程科学与技术,2013,45(Z1):67-73.
Ji Xian-Jun,Ou Guoqiang.Comparison Analysis of the Motion Process about Viscous and No-viscous Landslip-collapse Soil based on PFC3D[J].Advanced Engineering Sciences,2013,45(Z1):67-73.