Factor of Safety of a Consolidating Slope by Finite Element Method

摘要

Factor of safety of a consolidating slope is obtained at various time intervals using finiteelement method. Four noded isoparametric plane strain element with two translational degrees offreedom is used to model the soil deformation. Pore pressure in soil is also modeled using fournoded isoparametric element. Displacement and pore pressure in soil are coupled and the resultingequations are solved to obtain the displacement and pore pressure in soil at various time intervalsfrom the beginning of consolidation up to the end of consolidation. Effective stresses in soil areobtained using finite element method whereas the critical slip surface and factor of safety of a slopeis obtained using a Monte Carlo technique. The analysis is used to obtain the factor of safety, porepressure and effective stresses in soil at various time intervals. It is concluded from the study thatthe method of combining the finite element method to determine effective stresses and Monte Carlotechnique to determine the critical slip surface is simple and can be used to obtain the factor ofsafety of a consolidating slope at various time interval.