Recently, much e ort has been devoted to improving the performance of geosynthetic reinforced walls under various stress conditions. In this research, the e ect of using cemented mixed soil as a back ll material on the static response of Geosynthetic Reinforced Soil (GRS) walls is studied. For this, numerical models based on a nite di erence code are made according to one of the Royal Military College's (RMC) fullscale test walls with the segmental facing. Di erent arrangements of soil reinforcement are considered in the presence of cemented sandy soil and sandy soil alone. In the cementtreated approach, each reinforcement layer is surrounded by a 30-cm cemented sand soil. The results show that the application of cement-treated sandy soil decreases the maximum deformation of the wall by as much as 75% compared to the cases where untreated sandy soil is used. Moreover, by applying cemented soil around reinforcements, the reinforcement forces reduce considerably. Therefore, increasing the number of reinforcement layers in the back ll will decrease the face wall deformation and the reinforcement forces, which are not cost e ective in many situations. It is also suggested that the application of the cementtreated technique can be an e cient cost-saving method, compared to common GRS walls.
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