Abstract
The sliding of the caisson breakwater placed in the outer region of breaker zone with the sea bottom slope of 1:100 is studied. Through the hydraulic model tests, it is found out that when the law-frequency surface variation makes the water level law, the breaking wave impact pressure is appeared and makes the caisson slide. In order to increase the sliding resistance force and to reduce the sliding distance, the crushed stone back filling method is proposed. The validity of this method was verified through the hydraulic model tests and the numerical simulation based on the non-linear dynamic spring model.
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