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Civil Engineering

Taipei MRT Wanda Line Contract CQ850A

Project Type
MRT System
Wanhua District, Taipei City; Yonghe District, New Taipei City

Architect / Supervising Engineer

Architect: Sinotech Engineering Consultants, Ltd.
Supervising Engineer: The 4th Site Office, Second District Project Office, Department of Rapid Transit Systems,Taipei City Government


Second District Project Office, Department of Rapid Transit Systems,
Taipei City Government


Including LG04 station:
It is an island platform station with 3 underground levels, covering depth of about 4.5 m, length of the station is 178.5 m (net length), width of the station is 18 m (net width) and the length of the platform is 80 m.

Scope of Work

  1. Underground MRT station, shield tunnel, MEP, elevator and escalator
  2. Station: LG04 underground station
  3. Shield tunnel: inner diameter 5.6 m, segment thickness = 25 cm, up track is about 1,716 m, down track is about 1,701 m, with 6 cross passages


  1. The longest river crossing tunnel with medium traffic volume in Taipei MRT:
    The shield tunnel is 1,716 m long, surpassing 1,270 m of the Wenhu Line CB420 . It is the longest tunnel in the medium volume system of  Taipei MRT.
  2. Maximum gradient:
    5.21% is the steepest tunnel of the MRT tunnel.
  3. The deepest excavation depth:
    The deep excavation of 44.1 m underground, passing through the complex geology and groundwater
  4. Maximum number of cross passages:
    There are as many as 6 cross passages in a single tunnel, so the excavation is risky and difficult.
  5. Unprecedented challenges:
    The distance between the outer edges of the upper and lower tunnels is the smallest, only 1.25 m; length with a net spacing of less than 1.5m, exceeding 80 m.

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