EMISSION OF SOUND DUE TO STRESSES AND DEFORMATIONS IN SOIL

EMISSIONS ACOUSTIQUES DUES AUX CONTRAINTES ET DEFORMATIONS DANS LES SOLS

OFTEN WITH THE DEFORMATION OF A MATERIAL SUBJECTED TO STRESSES THE ELASTIC WAVES ARE EMITTED FROM WITHIN THE MATERIAL. THE MEASUREMENT OF THESE WAVES IS POSSIBLE WITH A MECANO-ELECTRICAL SENSOR AND SIGNAL PROCESSING CHAIN. THE COUNTING AND ANALYSIS OF ACOUSTIC EMISSION ENABLES THE STATE OF EQUILIBRIUM OF THE SYSTEM TO BE EVALUATED. SOUND EMISSION IN SOIL HAS NOT BEEN STUDIED OFTEN UP TO THE PRESENT TIME. IT IS ENVISAGED TO CONDUCT A BIBLIOGRAPHIC ANALYSIS OF THE WORK ALREADY CARRIED OUT IN THIS FIELD, TO CONDUCT PRELIMINARY LABORATORY TESTS WITH WELL ADAPTED APPARATUS BY VARYING STRESSES ON SOIL SAMPLES SUBJECTED TO TRIAXIAL TESTS AND MEASURING SOUND EMISSION PERMANENTLY.