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Tender design, detailed design and construction supervision.
April 01, 1990
December 27, 1992
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.
Soft ground, terrace gravels overlying London Clay.
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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.