Multi-Factor Influence Analysis on the Liquefaction Mitigation of Stone Columns Composite Foundation

To optimize the design of stone columns composite foundation for liquefiable ground improvement in Tibar Bay Port Project, a 3D Finite Element (FE) analysis is implemented on earthquake response and liquefaction mitigation effect. Nine schemes are designed with orthogonal method. Taking peak acceleration excess pore pressure ratio as target indicators, influences four factors, including diameter, replacement ratio, stiffness, permeability analyzed by means range analysis, subsequently, optimal obtained. The results indicate that responses relatively sensitive to columns’ little ratio. stiffness diameter ranging prescribed boundary only have negligible effect drainage rather significant when soils’ greater than 100.