UP-TO-DATE MEANS OF SHEAR STRENGTH TESTS COMPARISON BETWEEN SIMPLE AND DIRECT SHEAR

Abstract

A modern laboratory for shear-strength testing has been developed in the last ten years at the Department of Hydrogeology and Engineering Geology at University of Miskolc. The own-developped computer-controlled triaxial equipment is suitable to perform tests at different stress paths. The computer controlled ring shear equipment due to its special technics of normal stresses is suitable for constant volume testing. The wall friction can also be measured. The study compares the shear equipments based on direct or simple shear theory, analyses the stress distribution, deformation fields inside the sample formation of failure planes.