Forward thinking engineering design has played a key part in ‘future proofing’ the maintenance of a Network Rail bridge in South Yorkshire.
Rotherham’s Parkgate Sluice Bridge, which crosses a former canal, was subject to a Permanent Speed Restriction (PSR) due to poor track alignment.
However, engineering teams were struggling to gain access to key maintenance components, frustrating attempts to properly maintain the structure.
HBPW Partner, Jon Livesey, takes up the story.
“Access for maintenance was virtually impossible and consequently, components were gradually failing with corrective action difficult due to this access issue.
“We could have opted for minor adjustments but HBPW discussed this with Network Rail’s engineers and we agreed this would most likely result in an inferior outcome. So, in the end, a more radical approach was adopted and the decision taken to replace the structure’s rail bearers and change the way the track was supported. “New rail bearers were sized allowing direct fastening of VIPA baseplates, positioned to match the preferred track alignment. Alongside these, new mesh grating was then installed on the existing cross girders.”
The existing track and rail bearers were removed and the new system installed in a single disruptive weekend possession, along with re-laying of over 300m of track.
“The track alignment was dramatically improved enabling the Permanent Speed Restriction to be lifted,” added Jon.
“More to the point, and thanks to some careful pre-planning, the approach taken means that unincumbered inspection and maintenance access can now take place because engineering teams have unfettered access to track and bridge components.
“It would have been so easy to have taken the less disruptive route but, had problems recurred and access not been improved when there was an opportunity to bring about change for the better, then little would have been achieved.
“In the event we have a solid structure with full engineering maintenance access which is a great outcome for everyone concerned.”
Client: Network Rail
Contractor: Network Rail Works Delivery