MODELING OF WAVE-INDUCED SEABED RESPONSE AND LIQUEFACTION POTENTIAL AROUND PILE FOUNDATION

A 3D integrated model is developed to study wave-induced seabed response and liquefaction potential around square pile foundation. While a Boussinesq wave mode (FUNWAVE) is used to simulate the wave-pile interaction, a seabed mode (WINBED) based on Biot's poro-elastic theory is solved for the seabed deformation, effective stresses and pore water pressure in soil. After verified with previous model and experimental works, this integrated model is applied to investigate the wave-induced seabed response and liquefaction potential in the vicinity of square pile foundation. The numerical results indicate that wave-induced pore pressure reduces rapidly with an increasing seabed depth, and the maximum pore pressure and largest liquefaction potential can be identified in front of the square pile foundation. It is also found that the phenomenon of liquefaction may occur inside the seabed soil while the upper layer remains un-liquefied.