Solution of engineering problems using combined geophysical tools

It is frequently occurring problem that existing buildings are located at filled up onetime open pit mining area or at recultivated waste deposit sites. Many times the quality of refilling is not appropriate for bearing the bad, moreover, the foundation also has not been built properly. Recent and present damages (subsidences, cracks of houses) call the attention for this problem and for the need of investigation of building foundations using some non destructive geophysical methods.