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| | Abstract | | For the soundness evaluation of lining concrete at a headrace tunnel of hydraulic power station, we performed GPR survey and compared dynamics properties of concrete with the judgmennt index which was obtained from observed wave. In Soundness evaluation of lining concrete of a headrace tunnel using Ground Penetrating Radar Part1, we paid attention to the scattered wave which occured from deteriorated lining concrete and examined the possibility as the index of soundness evaluation. The plane distribution of RMS amplitude of scattered wave was well corresponding to the deterioration map which was obtained by visual inspections. In this report, we described the result of GPR survey, and comparison between RMS amplitude of scattered wave and compressive strength of concrete core. As a result, negative correlation between RMS amplitude of scattered wave and compressive strength of concrete was confirmed. |
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