[1]熊传祥,王涛,鲁晓兵,等.降雨作用下崩岗形成细观机理模拟[J].山地学报,2013,(06):710.
　XIONG Chuanxiang,WANG Tao,LU Xiaobing.Mesomechanical Simulation of Slope Disintegration Erosion Under Rainfall[J].Mountain Research,2013,(06):710.
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降雨作用下崩岗形成细观机理模拟()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2013年06期
页码:
710
栏目:
山地环境
出版日期:
2013-01-01

文章信息/Info

Title:
Mesomechanical Simulation of Slope Disintegration Erosion Under Rainfall
作者:
熊传祥;王涛;鲁晓兵;
1. 福州大学 环境与资源学院，福建 福州 350108；
2.中国科学院力学研究所，北京 100190
Author(s):
XIONG Chuanxiang;  WANG Tao; LU Xiaobing
1. School of Environment and Resources, Fuzhou University, Fuzhou 350108，China；
2. Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080，China
关键词:
崩岗; 降雨; 颗粒流; 细观数值模拟
Keywords:
slope disintegration; rainfall; particle flow code(PFC3D); mesomechanical numerical simulation
分类号:
P642.21,X141
文献标志码:
A
摘要:
崩岗是我国南方地区一种特殊水土流失现象。利用颗粒流PFC3D软件,结合流体力学数值模拟有限体积法,通过三轴实验与数值试验结果对比,获得与宏观参数相匹配的细观参数,建立崩岗坡体模型。通过模拟不同降雨强度,再现崩岗坡体渐进性破坏过程。崩岗的形成历经裂隙发生、发展直至崩滑面贯通,最后崩岗产生。在高强度降雨条件下崩岗具有分块、分级特点。与此同时,对崩岗形成过程中岩土体渗透系数、孔隙水压力与坡面渗流量等变化发展规律也进行了研究。渗透系数总趋势随着时间的推移先增大,到达峰值后减小;而渗流量却表现为增加,当降雨强度大时,还表现为跳跃式增长。孔隙水压力在低降雨强度下,增长后随后稳定;在高降雨强度下,波动较大。...
Abstract:
Slope disintegration is a special type of water and soil loss phenomenon in the south of China. Based on particle flow theory and finite volume method of fluid dynamics，the Mesomechanical parameters obtained by comparing the PFC3D and that of triaxial test results, a numerical model of slope disintegration is set up. The gradual forming process of slope disintegration is simulated under different rain intensity. The results show the failure undergoes a process of fissure formed and developed until slope disintegration occurs. Under high rain intensity, it has the features of blocks and multigrades. Meanwhile, the development of the permeability, pore pressure and seepage discharge in the slope are also discussed. Permeability increases with time passing until it arrives its maximum, then decreases; While the seepage discharge keeps increasing, especially sharply under heavy rain; The pore pressure under low rain intensity firstly increases, then is steady, but fluctuates under high rain intensity. The results of the research is similar to the site conditions, which proves the feasibility of particle flow theory in the study of mechanism of slope disintegration .

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备注/Memo

备注/Memo:
收稿日期(Received date)：2013-01-23；改回日期(Accepted)：2013-04-15。
基金项目(Foundation item)：国家自然科学基金（41002127）。[Project（41002127）supported by National natural Science Foundation of China.]
作者简介（Biography）：熊传祥（1967-），男，湖北公安人，博士，副教授，主要从事土力学与地质工程教学和科研工作。[Xiong Chuanxiang, male, born in Gongan,Hubei province, Ph D, associate professor, major in soil mechanics and geological engineering.] E-mail：xiongchxa@@yahoo.com.cnn
更新日期/Last Update: 1900-01-01