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| | Abstract | | Thermal conductivity is one of the most important engineering properties to design electric power cables in the ground. However, measurement of thermal conductivity requires huge consumption times. So if thermal conductivity is estimated by geophysical methods without drilling boreholes, measurement time and cost will be reduced. Thermal conductivity, resistivity and seismic velocity vary with water content and porosity, respectively. Therefore, there is a possibility to have a correlation among these three properties. We have carried out laboratory measurements of resistivity, P-wave velocity and thermal conductivity of soil sample in various saturation and porosity conditions. As a result, resistivity varied with water contents and porosity, and had a correlation with thermal conductivity. This suggests that there is high possibility to estimate thermal conductivity from resistivity. However, P-wave velocity did not vary with water contents in unsaturated conditions, and had an uncorrelation with thermal conductivity. |
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