Sarens crew deploys SPMTs and jacking towers to quickly and expertly guide bridges into place.
When a project demands precise, secure bridge installations on an extremely tight timeline, clients know they can trust Sarens to deliver. In the summer of 2022, Sarens successfully transported and installed two concrete railway bridge sections in the Nittedal municipality of Norway, replacing an existing single-track railway bridge with a dual-track bridge for client NRC Norge.
The railway remained operational between the installation of the two bridges, meaning only a brief period of four hours was available for bridge installation. This put the Sarens crew under continual time pressure as everything had to be executed perfectly to avoid delays. To ensure a smooth operation, Sarens deployed 24-axle SPMTs as well as four CS350 jacking towers chosen for their stability and speed of operation. Both were mobilised to the site by truck four days ahead of the installation date.
The new bridge had been fabricated in two separate sections, in different locations approximately 300 metres from the installation point. This made it possible to install the bridge one section at a time, carefully transporting and jacking sections that weighed 500 tonnes and measured 24 metres long, eight metres high, and four metres wide. The bridges were jacked up approximately 2.9 metres before being jacked down into position (the height under the bridge was jacked to 9 metres during final transportation).
Transport was a particular challenge due to the hilly topography of the area, with its steep 6 per cent inclines and similar declines for the second bridge installation. This required the SPMTs to drive with the bridge jacked up some of the distance.
NRC Norge commended Sarens’ equipment and performance during the bridge installation, which was completed on schedule thanks to the professionalism and expertise of Sarens’ supervisor and five operators.