Numerical Analysis of a Geogrid-Reinforced High Embankment

High embankment with geogrid can restrict the deformation and improve the strength and stability of soil. In order to study the characteristics of geogrid reinforced high embankment, the stability based on geogrid reinforced high embankment project of Hebei province and compare reinforced embankment under different conditions by using the FLAC3D and analyze the mechanism of reinforced embankment were studied in this paper. The results show that the maximum deformation happened in the center of high embankment, and relatively small deformation appear at the edge of high embankment. The interface friction angle the greater the better, it can make the better friction between geogrid and soil, and could reduce vertical additional stress within a certain depth. Geogrid can improve the redistribution and decrease horizontal stress and vertical stress of reinforced embankment. Plastic zone appears the slope angle at top and bottom of the slope. Stretching damage of plastic region of embankment is located in the bottom of the embankment, tensile failure occurs in the slope of top of the embankment, shear failure and tensile failure appears at the bottom of the embankment.