Effects of water content on the shear behavior and critical state of glacial till in Tianmo Gully of Tibet, China

doi:10.1007/s11629-019-5440-9

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 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol16 No.8

	Effects of water content on the shear behavior and critical state of glacial till in Tianmo Gully of Tibet, China
	Zhou, Gordon G. D.; Chen Lei-lei; Mu Qing-yi; Cui, Kahlil Fredrick E.; Song Dong-ri
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:8 页码:1743-1759
关键词	Glacial till Shear behavior Water content Dilatancy Direct shear test Critical state
ISSN号	1672-6316
DOI	10.1007/s11629-019-5440-9
文献子类	Article
英文摘要	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.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000478892900002
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46548]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.8
推荐引用方式 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.