高含冰量冻土的融化压缩变形机理探讨

doi:10.3969/j.issn.1002-0268.2012.12.002

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Abstract Current theories on the thawing compression of frozen soil exhibit a number of inadequacies because of the failure to consider the effect of moisture. Considering the effect of temperature coupled with moisture and stress and introducing a field variable of void ratio e, the model of thaw compression deformation of ice-rich frozen soil was established. By comparing its simulated results with the experimental results, it can be seen that theoretical model accurately reflects the deformation process of ice-rich frozen soil. The test and the calculation results both indicate that the thawing compression deformation of ice-rich frozen soil results from the combined action of several factors such as temperature, moisture, and stress. The deformation of ice-rich frozen soil is mainly attributed to the thawing-compression-drainage (TCD) process, in which the deformation process is basically completed. The deformation in the TCD process accounts for most of the total deformation of frozen soil. Moreover, the deformation tends toward stability in this process. The thawing settlement property of frozen soil determines its deformation law, which is the mechanism of the thawing compression deformation of ice-rich frozen soil.

Key words： road engineering ice-rich frozen soil thawing compression deformation theoretical model laboratory experiment

Received: 12 January 2013

Fund:Supported by the Road and Transport R&D Project for Western Regions of China Commissioned by Ministry of Transport (No.200731849055);the Western Light Talent Culture Project of the Chinese Academy of Sciences (No.Y229051370);and the Applied Basic Research Project of Ministry of Transport of China (No.2011319495090)

Corresponding Authors: JIN Long, jlcoolmail@163.com E-mail: jlcoolmail@163.com

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	JIN Long
	WANG Shuang-jie
	CHEN Jian-bing
	DUAN Kang-jin

Cite this article:

JIN Long,WANG Shuang-jie,CHEN Jian-bing, et al. Study on the Thawing Compression Deformation Mechanism of Ice-rich Frozen Soil[J]. Journal of Highway and Transportation Research and Development, 2013, 7(3): 23-29.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/10.3969/j.issn.1002-0268.2012.12.002 OR http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/Y2013/V7/I3/23

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