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| | Abstract | | Design of underground power transmission lines requires simple and effective techniques for estimating soil thermal resistance which is one of the most important engineering properties to determine the transmission capacity of power lines. In order to evaluate the relationship between thermal resistance, electric resistivity and S-wave velocity with the parameter of water saturation or pore water conductivity, we conducted laboratory experiments using soil samples. As a result, we found a positive correlation between thermal resistance and electrical resistivity. We developed an empirical formula depended on soil types among thermal resistance, electrical resistivity and pore water conductivity. We also found a relation between S-wave velocity and soil granular size, which is concerned with soil types. |
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