Experimental Study on the Difference in Soil Liquefaction Under Uniformly Distributed and Planar Wavy Cyclic Loads

In order to investigate the effect of lateral extrusion generated by the pressure difference between the peak and valley on seabed liquefaction, this paper used a self-designed hydraulic cyclic loading device to study the liquefaction differences of soil under uniformly distributed and planar wave cyclic loads with and without lateral extrusion. The results indicate that the planar wave cyclic load with lateral extrusion can accelerate the occurrence of soil liquefaction compared to the uniformly distributed cyclic load without lateral extrusion, with acceleration rates ranging from 23% to 60%. Moreover, the larger the peak value and shorter the period of the cyclic load, the more likely the soil is to liquefy.