Application of ABAQUS in calculating deformation of excavations

The physical meanings of the parameters for the porous elasticity model and the critical state plasticity model in ABAQUS, a popular commercial finite element software, are discussed, and the methods to decide the parametric values from triaxial compression tests or oedometer tests are presented. Based on the relationship among the normal consolidation line, unloading-reloading line, K0 consolidation line and the critical state line of e–lnp′ curves and the modified Cam-clay model, the correlation between the initial void ratio and the mean effective stress in the field is deduced and used in the simulation by ABAQUS. A soil-nailing case is simulated in ABAQUS by means of the porous elasticity model and the critical state plasticity model. The deformation results of this soil nailing case are analyzed, and the rationality is verified by the monitoring data in practice. |