HS2 Burton Green Tunnel – South Portal

The entrance and exit of high-speed trains from tunnels creates significant issues of air pressure dispersal. The solution adopted by the designers for the Burton Green Tunnel South Portal was to have a fixed height porous portal section of varying width with pressure relief vents of varying sizes. Whilst the overall design was issued to…

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A487 New Dyfi Bridge

The new Dyfi Bridge was to be constructed to provide a more resilient crossing of the River Dyfi and its flood plain on the arterial A487 near Machynlleth in mid-Wales. The scheme required a 725m long elevated carriage way and river crossing to be built in a flood plain which has historically been inaccessible to…

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Henley Gate Vehicle Bridge – an overnight success!

The Henley Gate residential development forms the latest part of the Ipswich Garden Suburb which is aimed to provide up to 4,500 new homes for the city. The development site is divided by a cutting accommodating the main Ipswich to Lowestoft railway line. Railway possession availability to allow the construction of the bridge was extremely…

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Bletchley Flyover Reconstruction

Over the first weekend in May 2021, ABM’s supply of prestressed beams and precast, reinforced concrete cill beams contributed to the successful achievement of a major milestone in the construction of the East West Rail (EWR) link which will reinstate the rail connection between Cambridge and Oxford. To the south of Bletchley station EWR crosses…

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