Abstract
The granulation technique is a method of improving soft cohesive soil by converting it into high-strength particles with cement and polymer. The granular cement treated soil is lighter than general ground material, and therefore the backfill ground of granular soil can reduce the horizontal displacement of caisson-type quay wall. In the present study, a series of centrifuge model tests and elemental cyclic load tests was performed to investigate seismic behaviour of quay wall with the mechanism of the displacement reduction. The earth pressure on the caisson back surface was directly measured in the model tests in order to reveal the relationship between the earth pressure and the caisson movement in detail. In the model tests, the small dynamic earth pressure of granular soil resulted in the small horizontal displacement of the caisson.
