Experimental Study on Silty Seabed Liquefaction and Its Impact on Sediment Resuspension by Random Waves

Seabed liquefaction and sediment resuspension under wave loading are key issues in marine engineering, but usually regarded as independent processes (instead of coexisting interacting processes). Here, we analyzed random wave-induced seabed its impact on using flume experiments. Results show that a nonliquefaction scenario, excess pore pressure the oscillates with fluctuations, accumulation is low, while consistent upward gradient promotes suspension. Wave-induced shear stress was driver scenario. In liquefied state, waves different amplitudes differently responded to pressure; small-amplitude accumulated pressure, large-amplitude dissipated it. Liquefied soil formed mud waves, creating elliptical motion along waves. accelerated following ways: reducing critical stress; forming seepage channels inside seabed; resulting increased turbulent kinetic energy; dissipating releasing porewater, expelling fine-grained from soil. Our study reveals variation silty effect resuspension, which significant for understanding movement silt.