IMHE OpenIR  > 山地灾害与地表过程重点实验室
Effects of water content on the shear behavior and critical state of glacial till in Tianmo Gully of Tibet, China
Zhou, Gordon G. D.1,2; Chen Lei-lei1,2; Mu Qing-yi3; Cui, Kahlil Fredrick E.1,2; Song Dong-ri1,2
Corresponding AuthorChen Lei-lei(llchen@imde.ac.cn)
2019-08-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume16Issue:8Pages:1743-1759
AbstractGlacial tills are widely distributed in Tibet, China, and are highly susceptible to landslides under intense rainfalls. Failures of the slope during rainfall are closely related to the shear behavior of glacial tills at different moisture conditions. This study investigates the shear behavior and critical state of saturated and unsaturated glacial tills through a series of drained direct shear tests. The tests were conducted on two types of compacted glacial tills with different water contents and total normal stresses. A strain softening mode of failure is observed for all water content conditions accompanied by noticeable dilation. Dilatancy is found to decrease with increasing water content. Unsaturated samples showed increased rates of dilation as water content is decreased for all applied normal stresses a behavior which cannot be predicted well by classical stress-dilatancy models. Furthermore, it was found that the Critical State Line (CSL), plotted on the (e-ln sigma(n)) plane, can be used to define the shear behavior of unsaturated glacial tills at different water contents. The CSL of saturated glacial tills run parallel to this line. The experimental results in this study are aimed to provide a basic understanding to the underlying failure mechanisms of glacial tills.
KeywordGlacial till Shear behavior Water content Dilatancy Direct shear test Critical state
DOI10.1007/s11629-019-5440-9
Indexed BySCI
WOS KeywordSTRENGTH CHARACTERISTICS ; UNSATURATED SOIL ; PLASTICITY MODEL ; SUBGLACIAL TILL ; DEBRIS FLOWS ; STRESS ; STABILITY ; LOESS ; PRECIPITATION ; COMPRESSION
Language英语
Funding ProjectKey Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC010] ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS)
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000478892900002
Funding OrganizationKey Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS)
PublisherSCIENCE PRESS
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26769
Collection山地灾害与地表过程重点实验室
Corresponding AuthorChen Lei-lei
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Xi An Jiao Tong Univ, Dept Civil Engn, Xian 710049, Shaanxi, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding 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
Zhou, Gordon G. D.,Chen Lei-lei,Mu Qing-yi,et al. Effects of water content on the shear behavior and critical state of glacial till in Tianmo Gully of Tibet, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(8):1743-1759.
APA Zhou, Gordon G. D.,Chen Lei-lei,Mu Qing-yi,Cui, Kahlil Fredrick E.,&Song Dong-ri.(2019).Effects of water content on the shear behavior and critical state of glacial till in Tianmo Gully of Tibet, China.JOURNAL OF MOUNTAIN SCIENCE,16(8),1743-1759.
MLA Zhou, Gordon G. D.,et al."Effects of water content on the shear behavior and critical state of glacial till in Tianmo Gully of Tibet, China".JOURNAL OF MOUNTAIN SCIENCE 16.8(2019):1743-1759.
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