The Nonlinear Finite Element Analysis Of Geosynthetics In Reinforced Embankment

The field of soil mechanics is a classical topic. With the using of geosynthetics, the stability analysis of geosynthetics reinforcement slope becomes more important. The analysis of slope stability in engineering practice has been made dominantly with Total Stress Analysis methods up to nowadays, but as a matter of fact in most cases the state of stress on critical slip surface is not in agreement with that of real ones, as the Total Stress Analysis methods only consider the integral unit stress of soil mass, take no account of the distributing of stress and the relationship between stress and strain.In this paper, the nonlinear finite element method is to be used to analyses the stresses field and displacements field of geosynthetics reinforcement slope, and the result that calculated by the finite element method program is used to search the critical slip surface and decided the safety factor. Duncan-Chang nonlinear numerical model and Goodman interface elements are used in this program. The safety factor is determined by the ratio of the summed shear to the summed shear stress along the critical slip surface. The dynamic programming method is adopted in searching for the critical slip surface of a slope.The stresses and displacements field of various geosynthetics reinforcement slopes are analyzed in this paper. It is this result that indicates that the advantages of these tow methods based on finite element technique to limit equilibrium methods is quite obvious, as the finite element method rather than traditional limit equilibrium method can simulate the behavior of stress and strain of soils and the processes of slope formation and /or excavations.