This paper utilizes numerical method to simulate the application of geosynthetic reinforced soil retaining structures. The SLOPE/W computer program is employed in this study to introduce the calculation of the reinforcement forces and the strengthening mechanical behavior of the soil structure as well as the failure mode. When using SLOPE/W program for analyzing geosynthetic reinforced soil retaining structure, each layer of the reinforcement is considered with the identical tensile force on the sliding surface on the same slice. Once the reinforcements committed pull-out failure, they bear different tensile forces. While the reinforcement committed break-off failure, the reinforcement tensile forces are the same. The unique component is the neat consideration for making the different required length of reinforcement. Under the circumstance of the iailure surface not cutting through the reinforcement, it does not provide any resistance force. In addition, SLOPE/W is used for the slope stability analysis of the geosynthetic reinforced soil retaining structure built in FoGuang University, Ilan County, Taiwan. Slope condition in the absence of the reinforcement gives the factor of safety as 0.93, which does not meet the requirement of slope stability at all. While with the support of reinforcements, the safety factor is increased to 2.19, which matches the specification under normal condition.
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