This study investigates the performance of the rst reinforcement layer depth for sand subbase of a road or construction by plate load laboratory tests. Unreinforced and reinforced experiments on di erent reinforcement types were made by changing depth ratio of the rst reinforcement layer. One type of geotextile and two di erent geogrid specimens were used in the research. 'Load-settlement curves' and 'Bearing Ratios' were studied by measuring the results of di erent settlement ratios. Finally, laboratory measurements of unreinforced and reinforced soils using geotextile reinforcement were compared with Finite-Element Model (FEM) analyses modeled in similar conditions. The results demonstrated the e ects of di erent types of reinforcements for di erent rst reinforcement layer locations. The number of reinforcement layers was another parameter that a ected the bearing ratio along with the rst reinforcement layer depths. It was also observed that the bearing ratio (BR) and load-settlement behavior changed signi cantly with the rst reinforcement depth and settlements. E ects on failure modes for unreinforced and reinforced sand soils were compared for each test.