PROJECTRailway tunnels

Railway tunnels

Railway tunnelsDaegok ~ Sosa Railway
Category BTL (First proposal)
Client Ministry of Land, Transport and Maritime Affairs
Contractor Daelim Industrial
Period March 03, 2010 ~ August 31, 2010
Project Information


  • Location
    Daegok Station ~ Gimpo Airport ~ Sosa Station, Korea  


  • Description
    • Total L = 18,450m     
    • Tunnel L = 15,370m
    • Earthworks L = 3,080m     
    • 2 existing stations, 3 new stations


      • Technical Issues
        • Application of the EPB (Earth Pressure Balance) shield TBM for tunneling underneath the Han river considering the high water level and complex ground conditions
        • Changing the spacing between connecting tunnels, which is used emergency passage, to improve the safety through the evacuation simulation
        •  Design of the tunnel station considering user's accessibility and constructability