We were tasked with developing a methodology that did not impede the travelling public and using a temporary works design that enabled the bridge to remain live throughout construction while also allowing the integrated team to work safely and efficiently.
We carried out thorough ECI, designed significant temporary enabling works, and delivered a complete renovation and a new permanent concrete pedestrian underpass to strengthen this busy 176-year old road bridge.
Constructed in 1848, the original bridge deck consisted of eight cast iron beams, but over the years it had been strengthened and new trestle supports added. The project came about after an inspection had found cracks in a number of the beams.
Jackson installed portal frames running parallel with the cast iron beams but situated central to each jack arch to support the bridge throughout construction, decreasing road closure spells and creating a safer working environment for the team. Throughout this project, the team used real-time monitoring around the clock to ensure the stability of the structure.