The　excavation　disturbance　of　the　shield　tunnel　under　the　pile-plank　structure　in　the　shallow　buried　construction　condition　was　studied.　Relying　on　the　excavation　project　of　the　subway　shield　tunnel　in　the　coastal　soft　soil　stratum　area,　the　deformation　law　of　the　near-field　and　far-field　structural　components　in　two　disturbance　stages　of　excavation　and　grouting　was　analyzed　by　in-situ　test　and　numerical　dynamic　simulation　methods,　and　the　disturbance　mechanism　was　clarified.　Results　show　that　during　the　shield　excavation　stage,　the　radial　squeezing　on　the　surrounding　soil　from　the　jacking　force　causes　the　lateral　bending　of　the　piles　and　the　lifting　of　the　roof,　and　when　the　cutter　head　drives　past　the　target　pile　by　1.00D　(D　is　excavation　diameter),　the　bending　of　the　near-field　pile　reaches　the　maximum.　In　the　grouting　stage,　the　roof　and　the　near-field　pile　rebound　with　the　soil　deformation　before　the　grouting　layer　hardens,　and　tend　to　be　stabilized　after　the　cutter　head　passes　over　the　target　cross　section　by　about　3.00D.　Meanwhile,　a　settlement　groove　appears　on　the　roof.　The　far-field　pile　1.00D　away　from　the　excavation　space　is　successively　squeezed　by　the　radial　extrusion　from　the　jacking　force　and　the　lateral　pushing　effect　by　the　rebound　settlement　of　the　tunnel　upper　stratum,　and　thus　the　bending　deformation　gradually　increases,　without　showing　the　rebound　deformation.　©　2021　Editorial　Board　of　Journal　of　Huazhong　University　of　Science　and　Technology.　All　right　reserved.