Prediction and Control of Settlement of the Highway Constructed on Soft Soil using Reinforcement by Geotextile

Construction the embankment on the soft soils leads to problems such as long term deformations and embankment stability due to high compressibility and low shear strength of the soil. Nowadays the use of geosynthetics is a practical procedure for improving soft soils characteristics. In this paper, a numerical modeling of the embankment constructed on the soft organic soil in the part of the Shahid Kalantari Highway was performed using the PLAXIS Code and Soft Soil Creep Model. The settlement of the highway after 9 years was reasonably predicted by numerical analysis. The effect of geotextile layer at the base of the embankment was then evaluated as a remedial action to control settlement. The results showed that the application of the geotextile layer, as a reinforcement layer, could significantly improve the performance of the embankment in this part of the highway.