气候变化领域集成服务门户(CCPortal): Laboratory investigation on strength and deformation characteristics of ice-saturated frozen sandy soil

CCPortal

DOI	10.1016/j.coldregions.2011.07.005
	Laboratory investigation on strength and deformation characteristics of ice-saturated frozen sandy soil
	Xu, Xiangtian; Lai, Yuanming; Dong, Yuanhong; Qi, Jilin
发表日期	2011
ISSN	0165-232X
EISSN	1872-7441
起始页码	98
结束页码	104
卷号	69 期号:1
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.
英文关键词	Frozen sandy soil; Strength criterion; Stress-strain behavior; Pressure melting; Confining pressure
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	DAMAGE CONSTITUTIVE MODEL ; STRAIN-RATE ; CONSTANT STRESS ; BEHAVIOR ; CRITERION ; CREEP ; SILT
WOS记录号	WOS:000296311100010
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239517
作者单位	[Xu, Xiangtian; Lai, Yuanming; Dong, Yuanhong; Qi, Jilin] Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China; [Dong, Yuanhong] 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],2011,69(1).
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).
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).