Abstract
Dynamic compaction (DC) is a well-known method of ground improvement used for its efficiency and operability. Currently, the majority of studies have focused on the analysis of dynamic compaction in dry soils, and only a few investigations have been conducted for saturated soil responses caused by DC, despite the fact that most application of DC in saturated deposits. Therefore, it is necessary to understand the behavior of saturated soils during DC, particularly in the saturated soils with poor permeability under multi-location tamping, in order to enrich the detailed design of DC. In this study, a numerical investigation on the responses of saturated silty soils under multi-location tamping is carried out using a coupled hydro-mechanical model. Verification of the proposed model is performed against the previous test data. Then, a series of parametric studies have been performed to examine the effects of tamping distance, tamping order and tamping patterns on the improvement degree of saturated granular soils under DC. Finally, some suggestions are presented to improve dynamic compaction effect in saturated deposits.
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