基于PFC3D粘性与无粘崩滑土体运动过程对比分析

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	基于PFC3D粘性与无粘崩滑土体运动过程对比分析
	陆桂红; 王钧; 欧国强; 杨顺
刊名	四川大学学报（工程科学版）
	2013-06
卷号	45 期号:S1 页码:67-73
关键词	崩滑土体粘性运动过程对比分析 PFC3D
其他题名	Comparison Analysis of the Motion Process About Viscous and No-viscous Landslip-collapse Soil Based on PFC3D
通讯作者	欧国强
中文摘要	大多数岩土体崩滑后形成由粗颗粒和黏性填隙介质组成的黏性崩滑体。为分析黏性填隙介质对运动过程的影响,利用MCR301,测定容重为1.360 g/cm3成都黏土法向黏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、法向黏连强度为200 Pa和无黏情况下,不同部位颗粒位置、速度随时步演化过程,分析结果表明:黏连强度改变崩滑土体启动运动模式,在200 Pa为推移式启动模式,无黏情况下为溜滑启动模式;黏性条件下颗粒峰值速度较无黏条件下小,而碰撞频率较无黏条件下高,速度波动幅度大。更多还原
英文摘要	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.
学科主题	灾害学
分类号	P642.2
收录类别	EI
语种	中文
公开日期	2013-12-20
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6668]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式 GB/T 7714	陆桂红,王钧,欧国强,等. 基于PFC3D粘性与无粘崩滑土体运动过程对比分析[J]. 四川大学学报（工程科学版）,2013,45(S1):67-73.
APA	陆桂红,王钧,欧国强,&杨顺.(2013).基于PFC3D粘性与无粘崩滑土体运动过程对比分析.四川大学学报（工程科学版）,45(S1),67-73.
MLA	陆桂红,et al."基于PFC3D粘性与无粘崩滑土体运动过程对比分析".四川大学学报（工程科学版） 45.S1(2013):67-73.