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Heathrow Express Rail Link

Tender design, detailed design and construction supervision.
Estimated cost: Commencement:
April 01, 1990
Completion date:
December 27, 1992
Nelson Road
United Kingdom
Technical data:

Railway link between Heathrow Airport and Paddington Station 2 underground stations: (Central Terminal and Terminal 4). Trial station tunnel with three different excavation and support sequences; lenght: 100 m, diameter: 8 m approx.

Geology description:

Soft ground, terrace gravels overlying London Clay.

Geology types:
Bid cost: Final cost:
£2.2 million GBP
Service areas:

The Heathrow Express Link provides a 15 minute high speed rail service between Paddington Station and Heathrow Airport. A 7.25 km spur running for the most part in tunnel provides the airport with underground stations at the Central Terminal area (Terminals 1, 2 & 3) and Terminal 4. Provision was also made for a link to the at this point proposed Terminal 5. The 5.5 km long tunnelled section will pass under the M4 motorway with the portal located to the north.

Removal of temporary side wall
Shotcrete lining completed
Finished adit
Subway entry at surface
Lattice girder and wire mesh installed at invert
Excavation of bench completed
Excavation of the side drift
Invert,installed lattice girder and wire mesh
Installed pressure cells
Installation of L.G. in top heading of side drift
Proposed Excavation Sequences
Instrumentation Scheme
Finite-Element Calculation
Excavation Sequence Type 1
Excavation Sequence Type 2
Excavation Sequence Type 3
Completed Trial Tunnel
Finished Platform Heathrow Central Terminal
Concourse Tunnel
Completed Escalator Shaft