<p>This study evaluated the uplift performance of granular pile anchors and geotextile-encased granular pile anchors in cohesionless soils through experimental testing and finite element modelling. The investigation focused on the influence of pile length, diameter, embedment ratio, and soil relative density on pullout load capacity. Results showed that an increase in pile length, diameter, embedment ratio, and relative density led to a significant improvement in pullout capacity for both systems. Geotextile encasement enhanced lateral confinement and reduced bulging, resulting in a 20–48% increase in pullout load compared with the unencased pile anchor. As the relative density of the soil increased from 40% to 80%, the pullout capacity of the geotextile-encased system improved by 25–72%, whereas the unencased pile showed a smaller increase of 27–33%. The benefit of encasement became more pronounced at higher embedment ratios, with the pullout load reaching up to 2.2 times that of the granular pile anchor at an embedment ratio of 15. The results indicated that geotextile encasement modified the failure mechanism and improved the efficiency of load transfer. Overall, the geotextile-encased granular pile anchor demonstrated greater stability and cost-effectiveness for resisting uplift forces in cohesionless soils.</p>