Study on wave-current force for pile foundation of sea-crossing bridge considering local scouring

Wave and current loads on pile foundation of sea-crossing bridges have always been given priority in the design of sea-crossing bridges. The wave-current force in practical projects is usually obtained by the computing method of wave-current force for single pile foundation recommended in the Code of Hydrology for Harbour and Waterway (JTS145-2015),without reasonable consideration of the influence of local scour shape. In this study,Hong Kong-Zhuhai-Macao Bridge has been taken as an example. Based on physical model test results,a calculation method of wave-current force for pile foundation considering local scour patterns is proposed by modifying the selection of such parameters as velocity,C_D and C_M in the calculation model. The proposed method,which guarantees the project safety and can be cost-effective as well,has been successfully applied to the design of pile foundation of Hong Kong-Zhuhai-Macao Bridge.