THE HEATHROW airside road tunnel project has won the 2002 Fleming Award for geotechnical teamwork, innovation and quality.
Client BAA, designer Mott MacDonald and civils contractor Laing O'Rourke beat entries for landslide stabilisation on the A542 at Pentredwr in North Wales and remediation of the failed Aznalcollar tailings dam in northern Spain.
Use of the observational method at the western portals of the road tunnels, which link Terminal 3 with the western aircraft stands and will eventually serve Terminal 5, allowed props to be removed entirely from temporary works. Up to 15m of contiguous pile walls, installed by Bachy Soletanche, were exposed during excavations for the TBM launch chamber and approach ramps.
Alan Powderham (Mott), Ian Williams (BAA) and Martin Daniels (Laing O'Rourke) picked up the £3,000 prize from Cementation Foundations Skanska chairman Robin Wood at the ICE last month.
The annual award is sponsored by Cementation in honour of its chief engineer Ken Fleming who died at the beginning of last year. The competition is supported and judged by the British Geotechnical Association.