A9 Dualling Project, Lynebeg Inverness

Construction of a precast railway bridge in Moy Inverness as part of the early works for the A9 dualling project, for BAM Nuttall and Network Rail.

A site adjacent to the replacement bridge was utilised for the construction phase of the project and during a weekend railway line possession in November 2021, our client BAM Nuttall demolished the old stone railway bridge and then carefully transport the new 700t portal frame using self-propelled modular transporter (SPMT) trailers several hundred metres to it’s new location. This method of off-site construction meant closures to the railway network were kept to an absolute minimum and disruption times reduced.

The construction phase of the structure was restricted to an extremely limited window, as construction and curing had to be completed well in advance of other works and well before the line closure deadline which was booked before the main contract award.

Construction of the reinforced concrete elements required working at heights of up to 6.0m to construct all aspects of the bridge and wing walls. We utilised a combination of MEWPs and scaffold to achieve this.  Seven precast wing walls were also constructed along the entranceway for the replacement structure, which were transported to their final location and positioned by large cranes.

Click here to view the installation video.