The construction of a new industrial and commercial area has involved heavy dynamic compaction work. The objective was to improve the ground mechanical properties of 7 to 15 m of well-graded gravel backfills lying on the geotechnical bedrock. To assess the quality and depth of ground compaction, cone penetration tests are often performed before and after the compaction. The method is intrusive, covers only one location at a time and requires a substantial amount of time to evaluate a large area. The evaluation quality is very dependent on the operational technique and soil type. In this paper, the quality and extent of ground compaction were evaluated using the results from in situ Multi-Channel Analysis of Surface Waves (MASW) seismic method and cone penetration tests (CPTs). The MASW tests were used to determine the shear wave velocity (Vs) profiles before and after the compaction, and the CPTs were utilised to determine the correlation between the Vs and the measured penetration resistance (qc) improvement along the profiles. The results of this study demonstrate both the effectiveness of using surface waves for the evaluation of compaction performance and the potential application of this technique to engineering and environmental problems.


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