Evaluation of Vibratory Compaction by In Situ Tests

Abstract

The effect of vibratory compaction on a sandy deposit was investigated using different types of in situ methods. An important objective was to determine the change in soil resistance and horizontal stress at different time intervals after compaction. The horizontal stress, measured by different in situ methods, showed a significant and permanent increase due to vibratory compaction. The overconsolidation ratio of compacted sand was estimated based on the increase in horizontal stress using different methods. The tangent modulus method is shown to be a powerful concept for evaluating the settlement of compacted soil by considering the increase in soil stiffness (modulus number) and overconsolidation. The modulus number derived from in situ tests was compared with data reported in the literature.