L-shaped geodrain in embankment model test and numerical simulation

An embankment is usually made of unsaturated soil. Unsaturated soil when properly compacted is stiff and strong, since it sustains the matrix suction. The soil suction disappears quickly in the process of wetting, which in turn brings about large deformation or even failure of the embankment. In order to prevent seepage flow into the embankment, and also accumulation of water behind it. Design for an L-shaped geodrain in the embankment is proposed in this paper. A numerical simulation was carried out to examine the efficiency of the L-shaped geodrain system. The analysis was based on the results of a seepage flow test performed using a decomposed granite soil.