Characteristics of the electrical resistivity of frozen soils.

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  • 凍土の比抵抗値の特性
  • トウド ノ ヒ テイコウチ ノ トクセイ

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Abstract

Electrical resistivities of unsaturated frozen soils were measured under different temperature and soil moisture conditions in order to develop a reliable model for field exploration. Electrical resistivities of pore water and unfrozen water in partially frozen soils were also measured. Based on the obtained data, the reliability of the previous model used for the determination of the electrical resistivity of unfrozen soil, known as Archie's law, was evaluated in the case of partially frozen soil. The trend of temperature dependency of resistivity yields a sudden increase of values occur in the frozen state near 0°C. Archie's law is not applicable in the case of fine-grained soil with a high water content above 0°C but is applicable below 0°C.

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