Deformation Control of the Existing Medium-Low-Speed Maglev Metro Viaduct over a Double-Line Bored Tunnel

Taking a double-line underground excavation subway tunnel underneath the medium-low-speed Maglev bridge section of Beijing S1 Metro line as project reference, deformation control index metro and track panel was studied using numerical simulation data monitoring, under conditions deep-hole grouting measures for soil layer around active lifting superstructure viaduct. The results show that maximum value pier is −1.73 mm vertical rail −1.56 mm. Monitoring shows magnetic levitation −1.25 within allowable range. Both field monitoring reflect trend existing structures; taken to strengthen upper structure roof elevation frame can effectively structure. study provide guidance reference similar projects.