CENTRIFUGE MODELLING OF CAISSON TYPE QUAY WALL WITH DIFFERENT SOLIDIFIED AREA OF BACKFILL DURING EARTHQUAKE

Abstract

 In the gravity-type quay wall supporting the earth pressure behind the structure by the self-weight, an increase of the horizontal earth pressure due to liquefaction result in damage of the caisson. As a countermeasure against the quay damage, a method of solidifying the back-filling layer behind the caisson has been proposed. In this research, the seismic response of gravity-type quay wall with different improved area has been investigated by experimental simulation using geotechnical centrifuge. As a result, it was confirmed that the displacement of the caisson can be reduced by solidifying the backfill at the same height as the caisson.