冻土未冻水含量与电导率的关系研究

doi:10.13722/j.cnki.jrme.2020.0718

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Abstract The determination method of unfrozen water content and ice content in frozen soils is one of the critical issues in cold region geotechnical engineering. This study performs a series of laboratory tests to investigate the electrical conductivity of frozen soils. The relationships among the electrical conductivity of frozen soils，the unfrozen water content and the temperature are revealed. The testing results show that the relationship between the conductivity and the temperature at positive temperature cannot be directly applied to negative temperature，and that the traditional simple methods which do not distinguish the electrical conductivity at positive and negative temperature zones will result in a considerable error. Based on the soil conductivity theory，an electrical conductivity model which can be applied at both positive and negative temperature zones is established to predict the unfrozen water content. Based on the analysis of the changing law of the bulk conductivity and the surface conductivity，it is found that the bulk conductivity can be ignored for the frozen soil. The developed simplified conductivity model is then validated by the tested results and the existing method in the literature，showing that the new model has a good agreement with the measured data.

Key words： soil mechanics unsaturated frozen soil bulk conductivity surface conductivity electrical double layer cation exchange capacity

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	Articles by authors
	LUO Haoliang1
	TENG Jidong1
	2
	ZHANG Sheng1
	2
	SHENG Daichao1
	2

Cite this article:

LUO Haoliang1,TENG Jidong1,2, et al. Study on the relationship between unfrozen water content and electrical conductivity in frozen soils[J]. , 2021, 40(5): 1068-1079.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2020.0718 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I5/1068

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