Experimental study on mechanical behaviors of saturated rock under different loading paths

The different loading paths have influences on strength characteristics, deformation behaviors, and the types of rock failure. The characteristics of strength, deformation and failure of saturated rock are investigated by the conventional triaxial test and that under cyclic loading with different deviatoric stress states, for instances, current triaxial test, current triaxial test of undrainage, proportional loading test, lateral unloading test, injection test under different deviatoric stress states, unloading test of water pressure under different deviatoric stress states, and current loading test with cyclic loading, etc.. The experimental results show that the fundamental properties, i.e., the strength decrease, deformation increase, and splitting effect of water pressure and etc., come from cyclic loading, injecting under different deviatoric stress states, unloading of water pressure with undrainage under different deviatoric stress states, proportional loading and the lateral unloading and the like. These fundamental behaviors are very important for geotechnical engineering.