The Highways Agency has warned that repairs to the Gravelly Hill Interchange in Birmingham, commonly known as Spaghetti Junction, will now extend into spring 2016, as engineers uncovered damage to loadbearing supports and joints.
“We expected to carry out concrete repairs as part of this work”, project manager Jess Kenny said. However, water has breached the old waterproofing, damaged the concrete deck and corroded the internal steel reinforcement on the 40-year-old junction that carries 200,000 vehicles a day.
It was estimated originally that 2.5% of the concrete carriageways needed repairs, however, the location of the damage makes the repairs “very challenging”.
Work will now be carried out in phases, to maintain structural integrity of the bridge. Kenny said: “We’d love to be able to pull up all the surfacing and complete this work in one go: but that would seriously weaken the integrity of the bridge deck and cause a real threat that the structural stability of the bridge will be compromised.”