This　paper　presents　an　isolation　pile–soil　lateral　interaction　model　that　considers　not　only　the　relative　linear　sliding　at　the　pile-soil　interface　but　also　the　pile　group–soil　interaction.　The　model　allows　for　the　calculation　of　the　pile–soil　interaction　force　using　the　elastic　continuum　method　combined　with　the　displacement　compatibility　relationship　at　the　pile–soil　interface,　thus　enabling　the　total　lateral　ground　displacement　to　be　obtained.　The　proposed　method　is　validated　by　comparisons　with　the　elastic　foundation　method　(EFM)　and　the　boundary　element　method　(BEM).　The　advantages　of　the　proposed　method　in　calculating　the　lateral　ground　deformation　resisted　by　isolation　piles　are　demonstrated.　The　mechanical　mechanism　of　the　isolation　pile＇s　lateral　resistance　effect　on　ground　deformation　can　be　summarized　as　follows:　the　combination　of　positive　and　negative　resistance　effects　drives　the　lateral　ground　displacements　along　the　depth　direction　from　the　original　inhomogeneity　caused　by　the　tunnel　excavation　to　a　relatively　homogeneous　state.　The　soil　parameters　including　Poisson＇s　ratio,　internal　friction　angle　and　ground　volume　loss;　the　isolation　pile　parameters　including　the　distance　of　the　tunnel　axis　from　the　pile　axis,　the　pile　length,　the　buried　depth　of　the　pile　top　and　the　relative　pile　bending　stiffness;　and　isolation　pile–soil　interface　parameters　including　relative　pile　shaft–soil　stiffness　and　relative　pile　tip–soil　stiffness　all　exert　a　significant　influence　on　the　lateral　resistance　effect　of　the　isolation　pile.　In　light　of　that　the　resistance　effects　at　different　depths　below　the　surface　are　not　uniform,　it　is　of　the　utmost　importance　to　assess　the　resistance　performance　of　the　isolation　pile　in　accordance　with　the　location　and　lateral　deformation　requirements　of　the　protected　structure　in　actual　engineering.　©　2024　Elsevier　Ltd