Seawall is one of the most important coastal infrastructures to withstand and reduce the harm of extreme sea condition. However, the strong interaction between seawall and waves in extreme weather is easy to cause instability and fracture of the artificial protective block and protective layer of seawall surface. In extreme cases such as tsunami waves, the wave height increases sharply when the nearshore water depth becomes shallower. Tsunami waves with great energy run-up the seawall. Tsunami waves interact with land and cause great damage. Therefore, the investigation on the hydrodynamic characteristics of tsunami waves during its propagation and run-up is a significant aspect to reveal the influence mechanism and decrease the risk. In this article, solitary wave is used instead of extreme sea conditions such as tsunami waves. In order to guarantee the accuracy of the calculation, this model is verified through the comparison between the numerical and experimental data. In this numerical simulation, the effects of solitary wave with different prominent conditions including wave height and submersion on wave run-up is studied. This paper analyzes the hydrodynamic characteristics of seawall slope protection surface. The distribution law of hydrodynamic load and instability mechanism of typical seawall slope protection structure are discussed. At the same time, this study obtains the trajectory law of water quality points under the influence of solitary wave. The analysis results can provide reference for seawall construction. This study can deepen the understanding of the interaction between solitary waves and marine infrastructure.
The seawall is an important social infrastructure for coastal areas to defend against wind and tide. The seawall is an important barrier to protect the land from marine hazards. As the first barrier along the coastline, seawalls make a significant contribution to reducing the risk of natural disasters caused by extreme sea conditions (Takagi and Bricker, 2014). However, as the seawall operation time increases, some problems are also exposed. After experiencing extreme sea conditions such as tsunami and huge waves, seawall is prone to seepage and structural cracking (Shimozono and Sato, 2016).
