Heathrow Terminal 5
Coleshill Parkway
challenge in that its height of only 7.4m was relatively low compared to the span of 17.4m. This was successfully achieve using only 350mm thick precast arch segments over its entire length of 130m. The portals to the tunnel were formed with oblique ends to match the steep slope sides.
The most suitable and aesthetic way of achieving the roundabout with the perimeter road below was to install a cut and cover tunnel with a Reinforced Earth precast arch system. The arch itself comprised a standard twin section that met at the crown. The arch however represented a significant
During the build of T5 at Heathrow airport, a new perimeter vehicle access route had to built. The Western perimeter road also needed access to the main entry point off the M25. This was achieved by dropping the perimeter road below the access road and forming Terminal 5 roundabout above.
The Coleshill Parkway Transport Interchange comprises a new railway station and car park at Hams Hall, and an adjoining new bridge at Station Road, Coleshill, for pedestrians, cyclists and buses crossing the Birmingham-Nuneaton rail line. Reinforced Earth Company (RECo) was asked to undertake the specialist design of the Reinforced Earth approach ramps for Warwickshire County Council. The walls were constructed using selected granular fill with galvanized steel soil reinforcement. The walls were faced with precast concrete facing panels featuring a bush hammered finish. The curved alignment of the ramps meant that the precast wall panels had to be designed to accommodate radii of less than 12m. On top of the walls, vehicle containment was provided by parapets supported on precast copings designed and supplied by RECo which in turn are connected to in-situ concrete anchor slabs beneath the road surface. The performance of this parapet support arrangement has been verified under full scale dynamic impact tests and is included in our HAPAS certificate. In addition to designing and supplying materials for the project RECo provided on-site construction training to enable the Main Contractor to construct the walls using their own team.
Made with FlippingBook Annual report maker