Numerical Investigation on the Spudcan Penetration into Sand Overlying Clay Considering the Strain Effects

A numerical model with a Coupled Eulerian–Lagrangian (CEL) approach is proposed for spudcan penetration into sand overlying clay. Both stress-dependence and strain-softening effects are incorporated the M–C to describe sand, whereas Tresca softening effect used Effects of critical state strain threshold in clay sensitivity investigated. The verified against different soil conditions: uniform loose clay, dense It found that dominates shallow penetration, deep penetration. assumption constant peak friction angle accumulated deviatoric plastic less than leads an overestimation resistance sand. Furthermore, fit parameter obtained from triaxial tests tends underestimate should provide valuable tool geotechnical engineering analysis