| 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 Author | Chen Lei-lei(llchen@imde.ac.cn) |
| 2019-08-01 | |
| Source Publication | JOURNAL OF MOUNTAIN SCIENCE
 |
| ISSN | 1672-6316 |
| Volume | 16Issue:8Pages:1743-1759 |
| Abstract | Glacial 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. |
| Keyword | Glacial till Shear behavior Water content Dilatancy Direct shear test Critical state |
| DOI | 10.1007/s11629-019-5440-9 |
| Indexed By | SCI |
| WOS Keyword | STRENGTH CHARACTERISTICS ; UNSATURATED SOIL ; PLASTICITY MODEL ; SUBGLACIAL TILL ; DEBRIS FLOWS ; STRESS ; STABILITY ; LOESS ; PRECIPITATION ; COMPRESSION |
| Language | 英语 |
| Funding Project | Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC010] ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) |
| WOS Research Area | Environmental Sciences & Ecology |
| WOS Subject | Environmental Sciences |
| WOS ID | WOS:000478892900002 |
| Funding Organization | Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS) |
| Publisher | SCIENCE PRESS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/26769 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Chen Lei-lei |
| Affiliation | 1.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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Zhou2019_Article_Eff（4457KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment