PROJECTSubway tunnels

Subway tunnels

Subway tunnelsBusan Subway Line 1 Extension (C4)
Category T / K Basic & Detailed design
Client Busan Transportation Corporation
Contractor Kolon Global
Period November 13, 2008 ~ January 31, 2010
Project Information
    • Location
      Jangnim-dong, Saha-gu, Busan ~ Dadae-dong, Saha-gu, Busan, Korea


    • Description
      • Total L = 1,790m
      • Tunnel L = 1,509m
      • 1 station
      • 4 Ventilation Shafts     


        • Technical Issues
          • Change of the shaft excavation method considering an urban development plan, from cut-and-cover method in large rectangular section to drill and blast method in circular section
          • Design of tunnel supports and auxiliary reinforcement methods for securing the safety of tunnel in shallow depth and poor ground conditions