Numerical Modelling of Soft Soil Installed by PVDs
One small-scale physical model test on the PVD (Prefabricated Vertical Drain) treated Hong Kong marine clay was simulated using finite element method (FEM) in this study. A User MATerial (UMAT) subroutine describing an Elastic Visco-Plastic (EVP) constitutive model was developed and incorporated into one commercial finite element code ABAQUS. A degressive permeability of the PVD strip was included to consider variations of its permeability during the consolidation process. The UMAT and the adopted reducing technique were demonstrated to be effective by good agreement between the observed consolidation settlement and excess pore water pressures and the simulated ones.
N. Ohno and T. Uehara
X.J. Yu et al., "Numerical Modelling of Soft Soil Installed by PVDs", Key Engineering Materials, Vols. 340-341, pp. 1249-1254, 2007