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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摘要 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.

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	金龙
	汪双杰
	陈建兵
	段康进

关键词 ： road engineering, ice-rich frozen soil, thawing compression deformation, theoretical model, laboratory experiment

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

收稿日期: 2013-01-12

基金资助: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)

通讯作者: JIN Long, jlcoolmail@163.com E-mail: jlcoolmail@163.com

引用本文:

金龙, 汪双杰, 陈建兵, 段康进. 高含冰量冻土的融化压缩变形机理探讨[J]. Journal of Highway and Transportation Research and Development, 2013, 7(3): 23-29.
JIN Long, WANG Shuang-jie, CHEN Jian-bing, DUAN Kang-jin. Study on the Thawing Compression Deformation Mechanism of Ice-rich Frozen Soil. Journal of Highway and Transportation Research and Development, 2013, 7(3): 23-29.

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