Investigation of contribution of high modulus columns on liquefaction mitigation based on effective stress approach by 3D finite difference method

Abstract

High modulus columns have become general engineering practice in terms of liquefaction mitigation although their effectiveness has not been validated thoroughly by both case and numerical analyses. Besides, only total stress analyses that do not take excess pore water pressure into account widely form numerical studies. Thus, in this study, role of high modulus columns as a precaution are investigated parametrically with intensive numerical analyses scheme adopting effective stress approach. It is indicated that high modulus columns can prevent liquefaction by decreasing pore pressure ratio. Their effectiveness increases with decrease of stiffness. © Copyright 2016 by the International Society of Offshore and Polar Engineers (ISOPE).