A displacement-based method for evaluating the stability of a pile-stabilized slope

This study proposes a theoretical model for evaluating the safety factor of a pile-stabilized slope using the monitored displacement of the sliding layer. The stabilizing force provided by the piles was determined using the subgrade reaction method, with the monitored displacement of the sliding layer as the primary input parameter. The sliding layer of the slope was considered as a rigid body sliding along the slip surface, assumed to be viscous-perfectly plastic with a Mohr-Coulomb failure condition. Based on the proposed model, the real-time safety factor of the slope could be determined using the limit equilibrium method based on the monitored displacement of the sliding layer. The model was applied to the Hongyan landslide to demonstrate its effectiveness. The results indicated that the model could reasonably predict the safety factor, offering practical convenience for engineers.