The contract, worth more than US$28m, is part of the repair works following a landslide in December 2010 adjacent to the bridge.
FCC will build a 175m concrete bridge with five spans, sitting on 1.5m-diameter pile caps. The project also includes safety and lighting works as well as traffic management on the entire section of the road affected by the landslide.
Repair work on the Centennial Bridge is now 63% complete.
FCC Construction had already been working since December on repairing damage resulting from the heavy rains, which led to the collapse of the embankment supporting the three northern lanes of the eastern access to the Centennial Bridge.
Collapse of the road was avoided by emergency reinforcement works, which were carried out with a view to later constructing the new bridge where the embankment had been. The reinforcement work is helping to stabilise the debris from the landslide, using about 200,000m3 of stone together with drainage trenches. Additionally, shotcrete has been applied to the slip plane and ductile iron micropiles have been driven into the weakest area and close to the support of the Centennial Bridge.
A pile wall is being anchored on the road median to contain the southern road. The wall will be made up of 141 perforated piles measuring 1m in diameter and with an average length of 35m, anchored at two heights. Once the anchors have been executed, the bed for the new bridge will be excavated.
