Solid-fluid sequentially coupled simulation of internal erosion of soils due to seepage

doi:10.1007/s10035-020-01076-0

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	Solid-fluid sequentially coupled simulation of internal erosion of soils due to seepage
	Yin, Yanzhou 1,3; Cui, Yifei 2; Tang, Yao 4; Liu, Dingzhu 1,3; Lei, Mingyu 1,3; Chan, Dave 5
刊名	GRANULAR MATTER
	2021-05-01
卷号	23 期号:2 页码:14
关键词	Wide-grading soil Rainfall infiltration Internal erosion of soil Discrete element method sequentially coupled with Darcy's flow model Fine particle migration Landslides
ISSN号	1434-5021
DOI	10.1007/s10035-020-01076-0
通讯作者	Cui, Yifei(yifeicui@mail.tsinghua.edu.cn)
英文摘要	Loose wide-grading soils are commonly found in the source areas of debris flows, and in landslides after an earthquake. During rainfall events, fine particles (fines) in the soils gradually migrate downward, and eventually the loss of fines results in an increase in the pore volume of the soil and a reduction in the stability of the soil skeleton, which can lead to subsequent slope failure. To gain more understanding of the fine migration process at the microscopic scale, a 3D discrete element-fluid flow sequentially coupled model is developed, based on Darcy's Law, to simulate fluid flow through a porous medium and calculate the transportation of soil solids. The erosion model is verified using experimental data. Parametric studies are carried out to investigate the effects of coarse particle size. The results reveal that changes in pore structure caused by fine particle migration can change the local permeability of the material. For the case of the average pore throat diameter to fine particle ratio (J) of 2.41, changes in local porosity with time from internal erosion in the sample can be divided into four stages: (1) a rapid increase with some variations in porosity, (2) a slow increase in porosity, (3) a rapid increase in porosity, and (4) a steady state with no change in porosity. Not all stages are present for all value of J. Stages (1) (2) (4) are present for 2.48 <= J <= 2.58 and stages (1) (4) are present for J <= 2.24 and J >= 2.74. A sharp increase in the fine's erosion possibility occurs for a J value lies between 2.58 and 2.74. The erosion possibility sensibility shows an exponential relationship with J. The model provides an effective and efficient way to investigate the process of pore blockage and internal soil erosion.
资助项目	National Natural Science Foundation of China[42077238] ; National Natural Science Foundation of China[41941019] ; National Natural Science Foundation of China[51908493] ; CAS[QYZDY-SSW-DQC006] ; State Key Laboratory of Hydroscience and Engineering[2020-KY-04] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0903] ; Major International (Regional) Joint Research Project[41520104002] ; Fundamental Research Funds for the Central Universities[2019QNA4035]
WOS研究方向	Materials Science ; Mechanics ; Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000621440700001
资助机构	National Natural Science Foundation of China ; CAS ; State Key Laboratory of Hydroscience and Engineering ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Major International (Regional) Joint Research Project ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/56014]
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
通讯作者	Cui, Yifei
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China 2.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Zhejiang Univ, Coll Civil Engn & Architecture, Ctr Hypergrav Expt & Interdisciplinary Res, MOE Key Lab Soft Soils & Geoenvironm Engn, Hangzhou 310058, Zhejiang, Peoples R China 5.Univ Alberta, Dept Civil & Environm Engn, Edmonton, AB, Canada
推荐引用方式 GB/T 7714	Yin, Yanzhou,Cui, Yifei,Tang, Yao,et al. Solid-fluid sequentially coupled simulation of internal erosion of soils due to seepage[J]. GRANULAR MATTER,2021,23(2):14.
APA	Yin, Yanzhou,Cui, Yifei,Tang, Yao,Liu, Dingzhu,Lei, Mingyu,&Chan, Dave.(2021).Solid-fluid sequentially coupled simulation of internal erosion of soils due to seepage.GRANULAR MATTER,23(2),14.
MLA	Yin, Yanzhou,et al."Solid-fluid sequentially coupled simulation of internal erosion of soils due to seepage".GRANULAR MATTER 23.2(2021):14.