HS2 Marston Box Slide
The world longest box bridge slide took place over Christmas 2022 to enable the HS2 railway line to cross over the M42 motorway in Warwickshire.
In collaboration with Balfour Beatty Vinci (BBV) teams, Freyssinet worked around the clock over the Christmas period to move the 12,600-tonne bridge structure over 163 metres and into position.
Freyssinet designed and implemented the sliding mechanism, utilising its Autoripage technique for heavy handling, which enabled the box to be pushed on a guiding raft and into place.
The box bridge slide operation took place between 24th and 26th December. Progressing at four metres per hour, the box was moved into position in 36 hours, completing ahead of the programmed schedule. This enabled BBV to proceed with subsequent works and reopen the M42 a day ahead of schedule.
Video uploaded on 18/04/2023 12:00am.
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