Vilchinska N.

Large scale long time experiment is carried out in situ on foundations of hydro power station located on soft soil. Cracked concrete and soft soils are realy nonlinear Loading assessment and analyses of recorded response are developed. It varied from quasi static to strong motion regimes. Acoustic emission (AE) spectra configuration, amplitudes, energy in different frequency ranges in 23 measurement point (MP) in 3D were investigated. AE spectra are high sensitive to static and dynamic load changes. Real concrete massifs are characterised by structural alterations, opening of fractures and their closure under load, i.e. transitional processes. They are reflected in the spectra of emitted acoustic signals, in the Q-factor of response, in surface wave velocity. To places with low velosity of surface wave corresponde low values of Q. Choose of saving regimes of exploitation from response analyze is the primary tasks of monitoring. Estimation of remain changes in the foundation after boosting regimes of exploitation are the second tasks of this investigation. Role of underlying soft soil emission in response forming is discussed. All measurements are carried out during usual work of hydroelectric power station.