INFLUENCE OF DIFFERENT CONSOLIDATED HISTORY OF ALLUVIAL CLAY ON THE CHARACTERISTIC OF LIQUEFACTION IN RECLAIMED GROUND

Abstract

It is found that the difference of consolidated history of an alluvial clay layer may affect the amplification of the vibration of the ground in a reclaimed ground during earthquake. For this reason, soil investigation, laboratory tests and numerical analysis were carried out in order to investigate the mechanism why Rokko Island experienced less liquefaction than the one in Port Island. It is found that the main reason is the existence of a large damping in the reclaimed ground of Rokko Island due to an unconsolidated alluvial clay layer beneath the reclaimed ground.