Effect of freeze-thaw cycles on uniaxial mechanical properties of cohesive coarse-grained soils

doi:10.1007/s11629-019-5426-7

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.9

	Effect of freeze-thaw cycles on uniaxial mechanical properties of cohesive coarse-grained soils
	Qu Yong-long; Chen Guo-liang; Niu Fu-jun; Ni Wan-kui; Mu Yan-hu; Luo Jing
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:9 页码:2159-2170
关键词	Freeze thaw cycles Residual strength Resilient modulus Softening modulus Uniaxial compressive strength Slope stability
ISSN号	1672-6316
DOI	10.1007/s11629-019-5426-7
文献子类	Article
英文摘要	Freeze-thaw cycles are closely related to the slope instability in high-altitude mountain regions. In this study, cohesive coarse-grained soils were collected from a high-altitude slope in the Qinghai-Tibet Plateau to study the effect of cyclic freeze-thaw on their uniaxial mechanical properties. The soil specimens were remolded with three dry densities and three moisture contents. Then, after performing a series of freeze-thaw tests in a closed system without water supply, the soil specimens were subjected to a uniaxial compression test. The results showed that the stress-strain curves of the tested soils mainly performed as strain-softening. The softening feature intensified with the increasing dry density but weakened with an increase in freeze-thaw cycles and moisture content. The uniaxial compressive strength, resilient modulus, residual strength and softening modulus decreased considerably with the increase of freeze-thaw cycles. After more than nine freeze-thaw cycles, these four parameters tended to be stable. These parameters increased with the increase of dry density and decreased with the increasing moisture content, except for the residual strength which did not exhibit any clear variation with an increase in moisture content. The residual strength, however, generally increased with an increase in dry density. The soil structural damage caused by frozen water expansion during the freeze-thaw is the major cause for the changes in mechanical behaviors of cohesive coarse-grained soils. With results in this study, the deterioration effect of freeze-thaw cycles on the mechanical properties of soils should be considered during the slope stability analysis in high-altitude mountain regions.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000485301000014
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46580]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.9
推荐引用方式 GB/T 7714	Qu Yong-long,Chen Guo-liang,Niu Fu-jun,et al. Effect of freeze-thaw cycles on uniaxial mechanical properties of cohesive coarse-grained soils[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(9):2159-2170.
APA	Qu Yong-long,Chen Guo-liang,Niu Fu-jun,Ni Wan-kui,Mu Yan-hu,&Luo Jing.(2019).Effect of freeze-thaw cycles on uniaxial mechanical properties of cohesive coarse-grained soils.JOURNAL OF MOUNTAIN SCIENCE,16(9),2159-2170.
MLA	Qu Yong-long,et al."Effect of freeze-thaw cycles on uniaxial mechanical properties of cohesive coarse-grained soils".JOURNAL OF MOUNTAIN SCIENCE 16.9(2019):2159-2170.