MEASUREMENT OF STRESSES IN ROCK MASSES

MESURE DES CONTRAINTES DANS LES MASSIFS ROCHEUX

THE RESEARCH UNDERTAKEN IN 1978 WILL BE CONTINUED IN TWO DIRECTIONS: (1) DEVELOPMENT OF FLAT JACK TESTS IN DEEP TRENCHES. CONTINUATION OF THE DEVELOPMENT OF (I) THE DEVICE FOR DIGGING TRENCHES AND (II) LARGE JACKS. STUDY AND DEVELOPMENT OF THE STRAIN MEASURING DEVICE. DEVELOPMENT OF THE INTERPRETATION OF DEFORMABILITY MEASUREMENTS WITH A FLAT JACK IN DEEP TRENCHES. (2) CONTINUATION OF STUDIES FOR THE DEVELOPMENT OF STRAIN MEASUREMENTS IN BOREHOLES. CONTINUATION OF THE LABORATORY DEVELOPMENT OF THE MEASURING CELL AND SURFACING DEVICE. CONTINUATION OF LABORATORY TESTS ON MODELS (TEST UNDER BIAXIAL LOADS). IN-SITU EXPERIMENTS IN SHALLOW BOREHOLES AS A FUNCTION OF THE POSSIBILITIES ON SITE.