International infrastructure group Balfour Beatty VINCI has completed the installation of 120 concrete beams on a 14,500-tonne box structure for the HS2 line under the A46 Kenilworth Bypass in Warwickshire.
The beams, measuring 13 to 24m, were lifted into place using three giant cranes.
This milestone was achieved ahead of schedule in 14 days, representing major progress in this engineering project.
The structure, built on land adjacent to the A46, eliminates up to two years of traffic management. This construction method reduces disruption while ensuring the safe and efficient completion of complex works.
With the beams installed, the next steps are completing the deck, the flat surface on top of the beams and installing parapets.
In spring, the structure will be moved into its final position beneath the A46 using an advanced jacking system by Freyssinet. This system will move the box at 2.5m per hour over 64m.
National Highways network planner David Patmore said: “We work closely with HS2 and its partners and welcome the innovative techniques being used to minimise disruption while delivering such a major, complex project.
“It’s good news that works are progressing so well, and we are grateful for drivers’ patience as the scheme moves towards the box push in spring.”
Additionally, preparatory works for the ‘box push’ are underway. The infrastructure group, in collaboration with National Highways and HS2, will close a section of the A46 between Festival Island (Coventry) and Thickthorn Island (Kenilworth) for two weekends in February.
The closures, from 8 pm on 7-10 February and 8 pm on 14-17 February, will allow engineers to upgrade safety barriers, adjust the central reservation, and complete drainage works.
A full closure is planned for spring 2025.
Balfour Beatty VINCI project director John McNiffe said: “The safe and successful installation of 120 giant beams is another great achievement for the Balfour Beatty VINCI team delivering this box bridge slide in Warwickshire.
“This 14-day operation required extensive planning and precision, and I am incredibly proud of how the team rose to the challenge.”
HS2 construction is advancing quickly between the West Midlands and London, supporting more than 31,000 jobs.
In the West Midlands, recent milestones include the completion of the first stage of a bridge over the M42 and the installation of two 159m steel spans for the River Cole Viaducts near Coleshill, North Warwickshire.
