To　examine　the　mechanical　response　of　a　metro　shield　tunnel　during　the　construction　of　a　cross-passage　using　the　front-traction　pipe　jacking　method,　a　finite　element　model　based　on　a　Beijing　metro　shield　tunnel　is　established　to　simulate　the　construction　process.　The　model′　s　accuracy　is　validated　by　comparing　simulation　results　with　field　monitoring　data.　The　effects　of　cross-passage　construction　on　the　dislocations　between　rings,　stress　and　deformation　of　special　segments,　and　bolt　force　are　studied.　Meanwhile,　the　effect　of　different　reaction　modes　on　the　mechanical　characteristics　of　shield　tunnel　are　analyzed.　Key　findings　include　the　following.　(1)　Opening　a　special　segment　significantly　affects　the　mechanical　properties　of　the　shield　tunnel;　the　stress　and　deformation　increase　gradually　with　the　excavation　of　the　cross-passage.　(2)　The　maximum　displacement　between　segments　is　recorded　as　1.17　mm,　occurring　at　the　bottom　of　the　joint　between　the　special　and　ordinary　segments.　The　highest　tensile　stress　in　the　special　segment　is　18.　6　MPa　at　the　top　and　bottom　of　the　opening,　whereas　the　maximum　compressive　stress　is　27.0　MPa　at　the　waist　of　the　opening.　The　maximum　transverse　expansion　and　vertical　convergence　displacement　of　the　special　segment　are　2.13　and　4.56　mm,　respectively,　with　the　inter-ring　bolt　experiencing　a　maximum　tensile　stress　of　213　MPa.　(3)　The　back-thrust　reaction　mode　proves　more　effective　in　controlling　the　horizontal　and　vertical　displacement　at　the　opening,　whereas　the　front-traction　reaction　mode　better　manages　the　stress　and　deformation　of　the　segment　and　the　dislocation　between　rings　opposite　the　opening.　©　2024　Editorial　Office　of　Tunnel　Construction.　All　rights　reserved.