PROJECTSubway tunnels

Subway tunnels

Subway tunnelsSeoul Subway Line 9 (C915)
Category T / K Basic Design
Client Seoul Metropolitan Government Office of Subway Construction
Contractor Hyundai E & C
Period August 01, 2007 ~ January 31, 2008
Project Information
  • Location
    Yeoksam-dong, Gangnam-gu, Seoul, Korea


  • Description

    • Total L = 1,770m
    • Tunnel L = 1,440m
    • Station L = 330m


  • Technical Issues
    • For the 37m section between cut-and-cover station and ventilation shaft, large scale 1-Arch tunnel station was applied considering ground conditions and maintenance convenience by installing passageways in upper part of tunnel
    • Change of the excavation method, from cut-and-cover to drill and blast, for improving traffic flows on the ground