Effect Of Scp Improvement Geometry On Mitigation Of Liquefaction-Induced Embankment Settlement

Liquefaction of foundation soil attributes significant damage to infrastructures. The sand compaction pile (SCP) method is one of the countermeasures against liquefaction to densify the ground by installing dense sand piles. Recently, an innovative method which can install the sand piles at various geometric form into the ground has been developed. However, the effects of the geometric form on the response and deformation behaviour of the improved ground are not well understood. The authors have studied the effects of SCP improvement geometric form on seismic behaviour of ground and embankment by centrifuge tests and numerical analyses. In this manuscript, the results of numerical analyses are presented, where it indicates that the SCP geometric form influences the deformation mode and related settlement of ground. Additionally, it is suggested that it has an optimum improvement geometric form for mitigating embankment settlement in certain ground conditions.