NDT MONITORING OF SLIDING SURFACES IN CONCRETE DAMS

摘要

During past years several methods have been used for dam monitoring along active and instable discontinuities, nevertheless engineers and researchers were looking for a precise, intelligent and fast method. One of the monitoring methods which recently has been under consideration and has been successfully applied is acoustic emission (AE). On the other hand, in order to have a better interpretation of the AE method, knowing the real circumstances of the discontinuities such as their opening, their bonding percentages, infilling material etc, are necessary. In this paper a methodology is developed for detecting location, continuity, opening, infilling materials of discontinuities by borehole logging techniques. At the next step, AE is used for monitoring movement and activity of different discontinuities in dam body, concrete-rock interfaces and rock mass.