DEVELOPMENT OF REINFORCEMENT METHOD FOR BREAKWATER CAISSONS AGAINST REPEATED IMPACT LOADS

Abstract

 In breakwater caissons covered with concrete blocks, repeated impact loads induced by collision of concrete blocks may cause localized failure of the wall. Generally, damaged walls are repaired after the localized failure is observed. On the other hand, a preventive reinforcement method for localized failure of caisson walls has not been established. In this study, an efficient and effective method of preventive reinforcement for caisson walls against repeated impact forces by using jet-grouting was proposed. The effect of reinforcement was evaluated by impact loading tests on models of caisson walls. The laboratory test results showed that the proposed reinforcing method is promising to enhance the resistance of caisson walls against repeated impact loads.