Abstract:
Soil liquefaction is a very dangerous phenomenon that involves huge damages during strong earthquake ground motion event. Stone columns (SCs) are widely used as liquefaction mitigation element which are expected to perform the following improvements against liquefaction hazard: a) densifying the surrounding soil increases the Cyclic Resistance ratio (CRR) b) stiffness of the column reduces the Cyclic Stress Ratio (CSR) c) rapid dissipation of excess pore water pressure. Although a very few studies in the behaviour of stone columns in the seismic zone has recently evolved, there is not much study in the performance of SCs in the multi-layered soils. This paper presents the investigations on the performance of SCs using 3D Finite element package under the action of seismic acceleration in the multi-layered soil profile. Effectiveness of the stone columns in terms of reduction in lateral deformation, improved shearing resistance capacity, stress ratio and pore water dissipation will be studied.
Abstract: Theme 4