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	Laboratory investigation on strength and deformation characteristics of ice-saturated frozen sandy soil
	Xu, Xiangtian1; Lai, Yuanming1; Dong, Yuanhong1,2; Qi, Jilin1
刊名	COLD REGIONS SCIENCE AND TECHNOLOGY
	2011-10-01
卷号	69期号:1页码:98-104
关键词	Frozen sandy soil Strength criterion Stress-strain behavior Pressure melting Confining pressure
ISSN号	0165-232X
DOI	10.1016/j.coldregions.2011.07.005
通讯作者	Lai, Yuanming(ymlai@lzb.ac.cn)
英文摘要	To investigate the properties of ice-saturated frozen sandy soil, a series of triaxial compression tests on frozen sandy soil with a volumetric ice content of about 50% were carried out at a temperature of -2.0 degrees C. The effect of confining pressure on strength and deformation features is analyzed according to the experimental results. The results show that the strength changes with increasing confining pressure in three distinct phases. According to the effective stress principle, the mechanism of strength is explained. A strength criterion is proposed to describe the strength characteristic. The equivalent stress versus axial strain curve shows strain-softening under each confining pressure, and the extent of strain-softening decreases with the increase in confining pressure, until it behaves the so-called perfect elasto-plastic feature when the confining pressure is large enough. The improved Duncan-Chang hyperbolic model is taken to simulate the stress-strain behaviors. The simulation shows that the model can well describe the strain-softening. The dependency of the volumetric deformation on the confining pressure is also discussed. (C) 2011 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	DAMAGE CONSTITUTIVE MODEL ; CONSTANT STRAIN-RATE ; CRITERION ; BEHAVIOR ; STRESS ; SAMPLES ; CREEP ; SILT
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:000296311100010
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556504
专题	寒区旱区环境与工程研究所
通讯作者	Lai, Yuanming
作者单位	1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China 2.CCCC First Highway Consultants CO LTD, Xian 710075, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Xu, Xiangtian,Lai, Yuanming,Dong, Yuanhong,et al. Laboratory investigation on strength and deformation characteristics of ice-saturated frozen sandy soil[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2011,69(1):98-104.
APA	Xu, Xiangtian,Lai, Yuanming,Dong, Yuanhong,&Qi, Jilin.(2011).Laboratory investigation on strength and deformation characteristics of ice-saturated frozen sandy soil.COLD REGIONS SCIENCE AND TECHNOLOGY,69(1),98-104.
MLA	Xu, Xiangtian,et al."Laboratory investigation on strength and deformation characteristics of ice-saturated frozen sandy soil".COLD REGIONS SCIENCE AND TECHNOLOGY 69.1(2011):98-104.

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