This　paper　presents　a　simplified　elastic　continuum　method　for　calculating　the　restraint　effect　of　isolation　piles　on　tunneling-induced　vertical　ground　displacement,　which　can　consider　not　only　the　relative　sliding　of　the　pile‒soil　interface　but　also　the　pile　row–soil　interaction.　The　proposed　method　is　verified　by　comparisons　with　existing　theoretical　methods,　including　the　boundary　element　method　and　the　elastic　foundation　method.　The　results　reveal　the　restraining　mechanism　of　the　isolation　piles　on　vertical　ground　displacements　due　to　tunneling,　i.e.　the　positive　and　negative　restraint　effects　exerted　by　the　isolation　piles　jointly　drive　the　ground　vertical　displacement　along　the　depth　direction　from　the　original　tunneling-induced　nonlinear　variation　situation　to　a　relatively　uniform　situation.　The　results　also　indicate　that　the　stiffness　of　the　pile‒soil　interface,　including　the　pile　shaft‒surrounding　soil　interface　and　pile　tip-supporting　soil　interface,　describes　the　strength　of　the　pile‒soil　interaction.　The　pile　rows　can　confine　the　vertical　ground　displacement　caused　by　the　tunnel　excavation　to　the　inner　side　of　the　isolation　piles　and　effectively　prevent　the　vertical　ground　displacement　from　expanding　further　toward　the　outer　side　of　the　isolation　piles.　©　2023　Institute　of　Rock　and　Soil　Mechanics,　Chinese　Academy　of　Sciences