New bridge lifting technique for Network Rail

Network Rail may start using a new bridge lifting technique – the first of its kind in the UK.

Developed with Alun Griffiths Ltd, Cass Hayward and Network Rail IP Engineering, and unveiled today by bridge and engineering services specialist Mabey, the technology combines proprietary steel supports and jacking, designed to be built remotely and transported into position.

At the moment, the £1.4m project has only been trialled on a single pier that forms part of a 150-year-old timber viaduct over the River Artro in Gwynedd, Wales – but allegedly it is already helping to save time and minimise disruption to Network Rail’s line to Pensarn and Llanbedr.

“The railway is vital to economic growth. Our essential renewal work to the River Artro viaduct will ensure it remains safe and reliable long into the future,” said Andrew Sperring, programme manager for Network Rail in Wales and the borders.

Using the technology, it is possible to repair or completely replace timber crossheads or support piers without having to strip the track and deck structures – saving time and money. In future, the system might be used for the upcoming refurbishment of Barmouth viaduct, the longest viaduct in Wales.

“The successful trial over the River Artro will change the way we approach and programme these repairs,” said Steve Richardson, contracts manager for rail at Alun Griffiths Contractors Ltd.