Description of Long-term Settlement of the Pleistocene Reclaimed Marine Foundations Due to Construction of Kansai International Airport

Abstract

A series of Elasto-viscoplastic finite element analyses is conducted to assess the stress and deformation of the reclaimed Pleistocene foundations of the 1st phase island of Kansai International Airport. Non-elastic behavior of the quasi-overconsolidated region is assumed to occur for the Pleistocene clays. The concept of "mass permeability" is also introduced by assuming the equivalent coefficient of permeability for the Pleistocene sand gravel layers to describe the overall behavior of excess pore water pressure for the individual layers. The calculated performance is found to describe the time - settlement relations of the individual Pleistocene clay layers that had been measured for about 14 years from the start of reclamation of the 1st phase island to that of the 2nd phase island.