Finite Element Analysis of Embankment with Soft Foundation Reinforced by Geogrids

Abstract

In order to appraise the effect on which geotechnical reinforce soft soil foundation, based on a finite element model of reinforced embankment on soft ground, the stability of soft foundation with step loading during the construction of subgrade was studied, and the influencing factors of reinforced effect were analyzed. The results show that reinforced by geogrid the lateral displacement of the foundation can be controlled effectively with little effect on the vertical displacement; with the increase of the embankment fill, the tension of geogrid is gradually increasing, and its peak is gradually moving to the middle line of subgrade; multi-layers geogrid is better, the effect of 2 layers geogrid is significantly better than 1 layer, the effect of 4 layers is not obvious compared with 2 layers; the closer the reinforcing position is to the ground, the better the effect; with lateral displacement of slope side becoming smaller with increase of the reinforced modulus, the reinforcement effect can be improved.