Technical specifications

Scope of work

  • 2 tunnel tubes
    length: 2,550 m each, internal diameter: 5.80 m
  • 6 cross-passages at intervals of 250 m
  • 2 stations:
    Serangoon Station, 205 m long
    Woodleigh Station, 210 m long,
    built in an open excavation supported by shoring (soldier piles and timber lagging)
    designed as civil defence shelters, turn-key
  • 1 viaduct with 2 separate superstructures with 2 x 3 lanes
    length: 1,750 m, width: 2 x 11.40 m
    using overhead launching system and the free cantilever method for large-span areas
  • Contiguous bored pile walls for Braddell Bartley Underpass
    approx. 1 km long, and soldier piles and timber lagging for the excavation of the Upper Paya Lebar Underpass box structure
  • extensive roadworks
  • 3 pedestrian bridges
  • 1 switching substation

Construction method

  • TBM tunnelling using 2 EPB shields
  • Shield diameter: 6.56 m
  • Cross-passages built using NATM techniques with an in-situ concrete inner lining

Geology

  • Sand
  • Clay
  • Granite

General data

Project
Singapore Metro, North East Line, Contract C704,
single-track metro tunnel

Client
Land Transport Authority of Singapore (LTA)

Contractor
Wayss & Freytag AG
as technical and commercial leader of a joint venture

Construction period
1997 to 2002

Construction costs
€ 177 million

Utilisation
Infrastructure
Type
Metro tunnel, single-track
Length
2 * 2,550 m
Construction Method
TBM tunneling using a EPB shield
Related Projects
SMART Tunnel
SMART Tunnel
Malaysia

A clever solution: What is normally a road tunnel turns into a storm water relief tunnel during floods. The storm water management and road tunnel in Malaysia is the answer to two challenges.

Read more
Finne Tunnel
Finne Tunnel
Germany

Biggest individual construction project within the scope of the traffic project Deutsche Einheit (German unity) 8.2 New section Erfurt – Leipzig/Halle.

Read more
Sluiskil Channel Crossing
Sluiskil Channel Crossing
Netherlands

Double-tube road tunnel under the Gent-Terneuzen Canal provides a new connection between the important ports of the Netherlands in the north and those of Flanders in the south.

Read more