Abstract
Verification of geotomography has ever been reported through numerical analysis, but not phenomenological approach. In-situ application of geotomography is increasing in these days, therefore its accuracy must be inspected at actual rock mass throgh direct collation.
The anthers had a chance to compare the in-situ geotomography with investigational results and rock mass of dam foundation. According to this comparison, it became clear that geotomography is useful as an auxiliary method for rock foundation survey.
