The construction of cross‐sea bridges is increasingly essential in modern infrastructure, but it poses significant challenges due to complex environmental conditions such as strong tidal forces, waves, and ocean currents. These factors can lead to scouring of pile foundations, severely affecting the stability and safety of the bridge structure. This study proposes a multi‐indicator grading warning system for assessing the risk of scour‐induced damage to pile foundations in cross‐sea bridges. The system integrates both vertical and horizontal bearing capacities of the pile foundation and utilizes Monte Carlo simulations to account for the uncertainties in environmental parameters like flow velocity, sediment properties, and water depth. A key innovation in this study is the introduction of a risk index based on the foundation bearing capacity, which offers a more comprehensive method to evaluate the susceptibility of the bridge to scour damage. The paper also presents the case study of a typical cross‐sea bridge, which demonstrates the application of the proposed warning system. Through the probabilistic analysis of key environmental variables, the system categorizes the risks associated with varying scour depths, providing clear guidelines for risk levels and appropriate mitigation strategies. The research aims to enhance the safety of bridge designs by offering a reliable risk assessment framework that predicts potential scour impacts, ensuring timely interventions. Overall, the proposed grading system is crucial for safeguarding the structural integrity of cross‐sea bridges, particularly in marine environments prone to scouring and extreme weather conditions.
Meng et al. (Thu,) studied this question.