For many unstable slopes

local or transient large displacement often occurs

even collapse due to excavation

rainfall or earthquake. The large lateral soil displacement may generate additional internal forces and deflection in stabilizing piles. Based on the two-stage method

the Winkler’s model is adopted to simulate the effect of pile-soil interaction

and the horizontal displacement control equations of a single pile are established. By considering the continuity condition and the boundary conditions

the analytical solutions of control equations are obtained and verified by monitoring data and Poulos’s elastic continuum method. Finally

with the typical engineering accident

the influence of lateral soil movements on adjacent stabilizing piles in slope is investigated by parametric analysis. It shows that the pile deflection and bending moment are obviously affected by soil lateral movement model

such as maximum displacements

distribution shapes and center of gravity

displacements energy

etc

on which it should be pay more attention practically.