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In the context of global climate change, the impact of group-occurring ocean dynamic disasters on China's off shore areas is becoming more and more intense. The study of the eff ect of existing ocean dynamic disasters on off shore hazard-bearing bodies mostly focuses on the eff ect of single disaster-causing factors, and it is still insuffi cient to study storm surge and dynamic wave coupling & reinforcement eff ects as well as the process of the dynamic response of such hazard-bearing bodies as seawalls. This study fi rstly realized the synchronous process of water level and wave through continuous tide generation and wave generation by the wave maker and tide generating device, so as to realize the dynamic coupling simulation of storm surge and wave in the laboratory. Then the physical model test of the typical seawall section was carried out under the dynamic coupling of storm surge and wave as well as at a conventional fi xed water level respectively. In the process of test wave overtopping discharge and the damage process of the levee crown and backwall of seawalls were observed and compared, and their damage mechanism was also studied.

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