Abstract
This study investigated the mechanism of liquefaction-induced ground displacement caused by the collapse of a quay wall. The investigation was based on case studies of past earthquakes, 1G tests, and centrifuge tests using a ground model. The ground displacement in the area of the collapsed quay wall was five to ten times greater than the thickness of the liquefied soil layer. The displacement ultimately extended 200∼300 meters from the quay wall, which centrifuge tests showed was due to the inclination of the land surface. This was verified through re-analyses of the ground slope measurements and case studies of the 1995 Kobe earthquake. The results of these tests and case study analyses were used to quantitatively measure the attenuation characteristics of the horizontal displacement of the liquefied soil behind the quay wall.
