冻融循环对固化盐渍土的抗压强度与变形的影响

doi:10.13722/j.cnki.jrme.2015.1078

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Abstract The frost heave and thaw subsidence of saline soil induced by freezing and thawing weaks the compressive property of saline soil in northern China. In order to study the effect of freezing-thawing cycles on the compressive properties of solidified saline soil，unconfined compressive tests(UCS) were conducted on the original saline soil，the lime-saline soil and the lime-SH agent-saline soil. The results indicate that the UCS values of the original saline soil，lime-saline soil and lime-SH agent-saline soil decrease as the freezing-thawing cycles increasing. The UCS value of lime-SH agent-saline soil is higher than that of other two types of soils after each freezing-thawing cycle. The lime-saline soil and lime-SH agent-saline soil are strain-softening after each cycle of freezing-thawing. The original saline soil without being frozen-thawed is strain-softening and after cycles of freezing-thawing is strain-hardening. Under the condition of same freeze-thaw cycles，the UCS values decrease with the increase of water contents of lime-SH agent-saline soil，meanwhile，the stress-strain curves tend to be flat gradually and the brittle behavior of specimen reduces. According to the results，the lime-SH agent-saline soil has a marked resistance against freezing-thawing，and the water content is the key factor to affect the compressive property of three soils after freeze-thaw cycles.

Key words： soil mechanics freezing-thawing cycles unconfined compressive strength stress-strain saline soil water content

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	FANG Qiuyang1
	CHAI Shouxi1
	LI Min2
	WEI Li1

Cite this article:

FANG Qiuyang1,CHAI Shouxi1,LI Min2, et al. Influence of freezing-thawing cycles on compressive strength and deformation of solidified saline soil#br#[J]. , 2016, 35(5): 1041-1047.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2015.1078 OR http://www.rockmech.org/EN/Y2016/V35/I5/1041

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