A vital bridge replacement project has taken a major step forward, following six days of intensive work over the main line between London, Hertfordshire, Essex and Cambridgeshire.
Network Rail is replacing the central spans of Nazeing New Road bridge in Broxbourne during a four-month road closure, but the main work over the railway took place between 13 and 18 January.
Trains couldn’t run under the bridge while this critical phase of the works was carried out, so there were rail replacement buses on some routes and alternative travel options for other journeys.
Engineers from Network Rail’s contractor, J Murphy and Sons, successfully achieved a number of important project milestones during the six days. They:
dug out the road over the central part of the bridge
lifted out the structure of the old bridge
put in the structure of the new bridge
Although the railway reopened on time on Thursday 19 January, the bridge remains closed to road users until Sunday 30 April. This is because there is still lots of work for the engineers to do, including:
pouring, curing and waterproofing the new concrete bridge deck
putting the road and pavement back
reinstalling the gas, electricity and internet connections that run across the bridge (these are currently redirected over a temporary structure)
strengthening other parts of the bridge, which will help to avoid the need for additional major work in future
The work is vital to keep passengers, drivers and pedestrians safe, and to avoid a more disruptive closure at short notice. Despite remedial works being carried out between 2010-14, the old bridge continued to deteriorate and reached the end of its useful life.
The new bridge is designed to last 120 years.
Pedestrian and vehicle diversionary routes are signposted while the road is closed.