Embankment Stability Analysis Using Finite Element Method and Genetic Algorithm on Layered Consolidating Soil - A Time Dependent Study

In the present study, the embankment stability constructed on a consolidating soil is examined using finite element modelling of the soil, which employs the Mohr-Coulomb elasto-plastic model, and optimized by applying a genetic algorithm (GA). The time available for excess pore pressure dissipation while constructing an embankment on a consolidating soil influences soil strength and might generate instability problems. The factor of safety (FOS) varies until the pore pressure is dissipated. In the current work, the FOS of the embankment is determined for three distinct problems at different time slots, starting from the moment of construction and continuing until consolidation is achieved. The finite element analysis evaluates the effective stresses, and GA is utilized to compute the least FOS conforming to the critical slip surface. The evaluation process is carried out at various intervals of time to determine the variation of the embankment's FOS. From the present study, it is possible to determine the FOS of an embankment constructed on layered consolidating soil at different time slots using a combination of the finite element method and GA. Using non-linear analysis, the effect of Poisson's ratio and modulus of elasticity on FOS is presented.