The instantaneous seabed liquefaction around offshore pile-type foundation and seabed protection under combined wave and current loading

The physical processes involved in the wave–seabed–mono-pile interactions are rather complex, and its upper lower structures affected by different loads. This paper presents application of a three-dimensional numerical model, which was validated with laboratory experiments available literature. First, soil response induced combined wave current around mono-pile is discussed, then stability pile foundation further evaluated. Numerical examples demonstrate run-up distribution seabed liquefaction piles closely related to characteristics ocean currents. Meanwhile, for group system, hydrodynamic dynamic regarded as function layout, will affect development near-trapping phenomenon under wave–current loading. Furthermore, protection mattresses proven be an effective option reducing potential liquefaction, not considered previous studies.