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Solid-fluid sequentially coupled simulation of internal erosion of soils due to seepage
Yin, Yanzhou1,3; Cui, Yifei2; Tang, Yao4; Liu, Dingzhu1,3; Lei, Mingyu1,3; Chan, Dave5
Corresponding AuthorCui, Yifei(yifeicui@mail.tsinghua.edu.cn)
2021-05-01
Source PublicationGRANULAR MATTER
ISSN1434-5021
Volume23Issue:2Pages:14
AbstractLoose 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.
KeywordWide-grading soil Rainfall infiltration Internal erosion of soil Discrete element method sequentially coupled with Darcy's flow model Fine particle migration Landslides
DOI10.1007/s10035-020-01076-0
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMaterials Science ; Mechanics ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Mechanics ; Physics, Applied
WOS IDWOS:000621440700001
Funding OrganizationNational 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
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/56015
Collection山地灾害与地表过程重点实验室
Corresponding AuthorCui, Yifei
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
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.
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