Prediction Method of Damage of Ground Induced by Liquefaction Based on Geological Structure of Surface Ground

摘要

When ground liquefaction occurs, settlement is often caused by shear deformation during and consolidation after an earthquake. However, settlement does not occur regularly but usually varies in space. In order to clarify the mechanisms underlying non-uniform settlement caused by liquefaction, 2-dimensional effective stress analyses were performed on a field damaged in the 2011 off-the-Pacific-coast-of-Tohoku earthquake. Distributions of the thickness and resistance of the liquefiable layer obtained from field surveys were considered in the numerical models. Simulated results confirmed that the non-uniform settlement was caused by the spatial distribution of the thickness and resistance of the liquefiable layer.