Evaluation of Grading Effect on Behavior of Rockfill Materials via Large-Scale Experiments

The rockfill structures are widely constructed throughout the world and rockfills are largely used in these structures as main materials or filler materials. In the crust of earth dams, the rockfill materials role is to stabilize the body of the dam, however, the behavior of these materials in Particular their shear strength is not fully understood. In this study, different tests have been conducted on the rocky materials of mianeh dam and the results have been studied to realize the behavior of these materials. These experiments Consist of Large Scale direct shear test (30×30) and large diameter triaxial test (20cm in diameter and 40cm in height) Carried out in geotechnical laboratories. In this study, the Following issues have been taken into account and discussed: Degree of compatibility between the triaxial tests results and the Large scale direct shear tests results and physical properties of materials for the Materials used in the dam under Consideration.