Abstract:A numerical nonlinear analysis procedure based on finite element method is developed for the geogrids-reinforced retaining walls. The effects of both backfills and geogrids can be considered in the procedure. A case study for a large-scale test wall reinforced by geogrids,which is well documented by Royal Military College of Canada,is used to verify the reliability of the proposed numerical method. Then a comparative study is conducted for a varied range of parameters involved in the analysis such as deformation and strength properties of backfills and rigidity,length and vertical spacing of geogrids. The influence of these parameters on distribution and variation modes of stresses and deformations of the system are examined based on the computed results. It is shown that the rigidity of geogrids had a considerable effect on the behavior of geogrids-reinforced retaining walls when the backfills are of lower strength and stiffness;and that the geogrids have a limited length when the height of wall is fixed;and that the spacing of geogrids also has an effect on the deformation of the wall face. The performance behavior of geogrids-reinforced retaining wall is further discussed.