PROJECTSubway tunnels

Subway tunnels

Subway tunnelsDX Line (Shinbundang) Northern Extension
Category BTO (Alteration proposal)
Client Seoul Metropolitan City Infrastructure Headquarters
Contractor Posco E & C
Period November 16, 2010 ~ December 30, 2010
Project Information
  • Location
    Downtown of Yongsan, Seoul ~ Gangnam Station ~ Jeongja-dong, Sungnam-si, Gyeonggi-do, Korea


  • Description  

    • Gangnam Station ~ Gwanghwamun Station L = 11,478m
    • Sinhannam ~ Yongsan L = 5,400m


  • Technical Issues
    • Design of the 2-Arch tunnel station for the downtown area considering elevated road, underground shopping mall, adjacent building, etc.
    • Application of a shield TBMl for the safe tunneling under the Han River