Calculation Method for Uplift Capacity of Suction Caisson in Sand Considering Different Drainage Conditions

Uplift capacity of suction caissons is one the main concerns in design jackets with multi-caissons supported offshore wind turbine. The uplift movement leads to soil stress variation and increases difficulty predict capacity. In this paper, a calculation method considering release differential pressure contribution proposed caisson. Firstly, series numerical simulations based on SANISAND model are conducted study responses caisson sand, it verified centrifuge test results. Considering drainage condition during being pulled out, fully drained, partially drained undrained divided, an equation provided assess beneath lid incorporating effects factors. Based above simulation results, calculate caissons. prediction results compared tests previous studies, which indicate that accuracy much improved. This contributes more accurate assessment sand.