多排抗滑桩支护边坡稳定性计算抗力模型改进及其应用OA

To address the significant discrepancies in stability analysis results caused by ambiguous resistance definitions and complex thrust distribution mechanisms in the design of multi-row anti-slide piles,this study develops a new stability analysis method for pile-reinforced landslides.The proposed method is characterized by clear physical concepts,computational robustness,and direct applicability in engineering practice.A computational model based on the"stepwise static equilibrium"principle is established,which discretizes the sliding mass into blocks and achieves stability through a mechanism in which the combined resistance of each sliding block and its preceding pile rows progressively balances the driving forces.Furthermore,a"pile-soil deformation coordination"model is introduced to quantify the pile resistance,comprehensively accounting for the pile flexural stiffness,the subgrade reaction of the embedded segment,and the pile-head displacement.Analysis of a case study demonstrates that the proposed method produces a global factor of safety of 1.005 and a critical pile row resistance of 2547.2 kN/m.These results lie between the outputs from Lizheng software(a stability factor of 0.987 and a resistance of 1175.0 kN/m)and GEO5 software(a stability factor of 1.09 and a resistance of 3186.8 kN/m),effectively mitigating the design risks of"over-conservatism"or"potential unconservative"associated with conventional methods.This study confirms that the stability analysis framework centered on"deterministic resistance"offers conceptually clear and rationally consistent outcomes,providing a novel design pathway that circumvents the intricate challenge of thrust distribution in multi-row anti-slide pile design.