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	Effects of cyclic freezing and thawing on mechanical properties of Qinghai-Tibet clay
	Wang, Da-yan; Ma, Wei; Niu, Yong-hong; Chang, Xiao-xiao; Wen, Zhi
刊名	COLD REGIONS SCIENCE AND TECHNOLOGY
	2007-04-01
卷号	48期号:1页码:34-43
关键词	freeze-thaw cycle failure strength elastic modulus cohesive force friction angle
ISSN号	0165-232X
DOI	10.1016/j.coldregions.2006.09.008
通讯作者	Wang, Da-yan(dywang@lzb.ac.cn)
英文摘要	A fine-grained clay was compacted in the laboratory and was thereafter exposed to a maximum of 21 closed-system freezing and thawing cycles. The sample height, water content, stress-strain behavior, failure strength, elastic modulus, cohesion and friction angle were measured in initial unfrozen soil as well as in subsequent thawed soil. The results show that the physical-mechanical characteristic of investigated soils changed after it was subjected to freeze-thaw cycles. The height of sample increased and water content decreased before the sample exposed to 7-10th cycle of freeze-thaw, but both the height and water content remained constant after the 7th freeze-thaw. The shape of the stress-strain behavior curves were not affected by the freeze-thaw process, but the resilient modulus and the failure strength were heavily influenced by the number of freeze-thaw cycles. The minimal values for both the resilient modulus and the failure strength were frequently achieved after the specimen was exposed to about 3-7 freeze-thaw cycles, therefore, the resilient modulus and the failure strength of soils experienced seven freeze-thaw cycles could be applied to the process of cold region engineering design. For the soil investigated, the cohesion decreased with the increasing number of freeze-thaw cycles, and the friction angle exhibit an increasing trend. (c) 2006 Elsevier B.V All rights reserved.
收录类别	SCI
WOS关键词	HYDRAULIC CONDUCTIVITY ; VOLUME CHANGES ; PERMEABILITY ; BEHAVIOR ; SOILS ; CONSOLIDATION ; SANDS ; SILTS ; TILL
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000245571400004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2555919
专题	寒区旱区环境与工程研究所
通讯作者	Wang, Da-yan
作者单位	Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Da-yan,Ma, Wei,Niu, Yong-hong,et al. Effects of cyclic freezing and thawing on mechanical properties of Qinghai-Tibet clay[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2007,48(1):34-43.
APA	Wang, Da-yan,Ma, Wei,Niu, Yong-hong,Chang, Xiao-xiao,&Wen, Zhi.(2007).Effects of cyclic freezing and thawing on mechanical properties of Qinghai-Tibet clay.COLD REGIONS SCIENCE AND TECHNOLOGY,48(1),34-43.
MLA	Wang, Da-yan,et al."Effects of cyclic freezing and thawing on mechanical properties of Qinghai-Tibet clay".COLD REGIONS SCIENCE AND TECHNOLOGY 48.1(2007):34-43.

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