Influence factors on pile foundation behavior by liquefaction ground flow

Abstract

In the past, authors have clarified that the behavior of the pile foundation when the liquefied ground flows in the sloping ground by conducting the model shaking table test under 1.0g gravitational field focusing on the interaction between the pile foundation and the surface non-liquefaction layer. It was confirmed that the surface non-liquefaction layer greatly influences on the pile foundation behavior when the liquefaction and the ground flow occurred.
In this study, the influence factors such as extent of the thickness, the stiffness of the surface non-liquefaction layer, the ground inclination, the base input vibration etc. on the pile foundation behavior were examined by conducting additional tests when the liquefaction and the ground flow occurred.
As a result, it was clarified that influences of the thickness, the stiffness of the surface non-liquefaction layer and the ground inclination level on external forces acting on the pile foundation became large during ground liquefaction and after shaking although it was small in the process to liquefaction initiation.