Geosynthetic-reinforcement pile-supported embankments have been widely used in soft ground improvement, yet the interactions among their components and the corresponding load transfer mechanisms remain intrinsically complicated. This study proposes an analytical model based on limit equilibrium theory, considering pile head settlement, pile–soil differential settlement, soil arching, and geosynthetic-soil interface friction. The model’s accuracy and reliability are validated using four field tests and four standard design methods (EBGEO-2011, BS8006-2010, CUR226-2016, and NGG-2005), followed by parametric analyses. The results demonstrate that the proposed analytical model in this article has significant advantages in the prediction of pile–soil differential settlement. The average prediction error of soil arching efficiency of the proposed method is 3.8%, which is better than the existing methods (14.7–25.7%). With a fixed pile spacing, variations in pile stiffness and subgrade reaction modulus influence the soil arching height and pile–soil differential settlement, indicating that the soil arching height dynamically varies in response to different conditions. Furthermore, incorporating the geosynthetic-soil interface friction enhances the soil arching effect compared to cases where this interaction is not considered.
Sun et al. (Sat,) studied this question.