Abstract
The present study developed and applied a new wave reduction method through caisson joints to suppress the risks of washout, cavity formation and collapse of seawalls and quaywalls to aging facilities under various influences of previous repair work and sediments. The results of backfill digging, internal cavity photographing, 3D sonar scanning and joint-transmitted wave force measurements demonstrate that over 90% reduction in the joint-wave transmission was achieved confirming the effectiveness and a wide range of the applicability of the proposed method. The method was further verified for the first time in deterring the collapse incidence where the cycle of collapse was known in advance in the field. Hence, the proposed method would contribute significantly not only to disaster prevention and mitigation but also to prolonging the life of aging port and coastal infrastructures.
