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| | Abstract | | Design of underground power transmission lines requires simple and effective techniques for estimating soil thermal resistance which is the most important factor to determine the capacity of power lines. We performed field experiments with a real size soil structure model with the backfill materials to estimate thermal resistance distribution by analytical cross sections of the 3D electric resistivity survey and the 2D seismic surveys. As the results, the 3D resistivity section was able to identify the boundary between the reclaiming soils and surrounding natural soil. And, the thermal resistance sections based on empirical formula obtained by the laboratory tests almost adjusted to the measurement value with the thermal resistance meter laid to the reclaiming soils. It was proposed that the exploration flow for the soil thermal resistance containing the electrical survey. |
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