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Experimental investigation of the creep behaviour of remoulded loess under different levels of compactness
Tang, Hao1,2; Luo, Jinzhi2; Duan, Zhao2; Wang, Dongpo3; Qi, Shengwen4
2022-01-24
Source PublicationPLOS ONE
ISSN1932-6203
Volume17Issue:1Pages:19
AbstractGenerally, a loess high fill project will undergo a time-dependent deformation and settlement process for a long time after the initial fill. Understanding the creeping behaviour of compacted loess is an important part of determining the stability of a compacted loess foundation. To study the creep behaviour of remoulded loess under different levels of compactness, we performed triaxial shear and triaxial creep tests using Q(2) loess specimens obtained from the new district of Yan'an city. Based on laboratory test results, the triaxial shear and creep characteristics of remoulded loess under different levels compactness are summarised. The regularity of instantaneous strain, creep strain, total accumulated strain and initial shear modulus were analysed and the relationship between the compactness and long-term strength of remoulded loess is provided. It was found that the remoulded loess becomes harder and its long-term strength increases with an increase in compactness. Furthermore, we propose a new creep model (HD), based on the hardening-damage mechanism, and have derived one-dimensional (1D) and three-dimensional (3D) creep equations based on this new creep model. This new creep model is flexible enough to fit the typical creep test curves of remoulded loess, while perfectly describing the tertiary creep stage. Finally, the sensitivity of the HD creep model parameters was analysed; the results indicate that the parameters denoted as alpha, gamma, and beta significantly affect the morphological changes and various stage characteristics are represented by the creep curve.
DOI10.1371/journal.pone.0262456
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordFRACTIONAL CALCULUS ; CONSTITUTIVE MODEL ; MECHANISMS ; EVOLUTION ; CHINA ; SOILS
Language英语
Funding ProjectNational Natural Science Foundation of China[41790442] ; National Natural Science Foundation of China[41602305]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000773223800032
PublisherPUBLIC LIBRARY SCIENCE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105069
Collection页岩气与地质工程院重点实验室
Corresponding AuthorLuo, Jinzhi
Affiliation1.Xian Univ Sci & Technol, Geol Res Inst Coal Green Min, Xian, Peoples R China
2.Xian Univ Sci & Technol, Coll Geol & Environm, Xian, Peoples R China
3.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Tang, Hao,Luo, Jinzhi,Duan, Zhao,et al. Experimental investigation of the creep behaviour of remoulded loess under different levels of compactness[J]. PLOS ONE,2022,17(1):19.
APA Tang, Hao,Luo, Jinzhi,Duan, Zhao,Wang, Dongpo,&Qi, Shengwen.(2022).Experimental investigation of the creep behaviour of remoulded loess under different levels of compactness.PLOS ONE,17(1),19.
MLA Tang, Hao,et al."Experimental investigation of the creep behaviour of remoulded loess under different levels of compactness".PLOS ONE 17.1(2022):19.
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