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The improvement of soil behaviour of an embankment constructed over a soft soil foun.oation stratum on a layer of a strong geosynthetic material as reinforcement, is examined in this paper. Emphasis is given in the analysis of deformations under undrained conditions .. A Finite Element elastoplastic code is used for the analysis of foundation soil displacements. Reduction of the lateral and vertical soil movements, compared with an unreinforced case are presented and discussed for a range of values of reinforcement tensile stiffness. Reinforcement in general, reduces the horizontal and
vertical movements of soj1 This improvement depends on the reinforcement tensile stiffness and on the displacement field of the soil layer, whi_ch is a function of the thickness of the foundation soil and of the soil strength.