Amey and Transport for London engineers last night finished the installation and tensioning of new post tensioning cables inside London’s Hammersmith flyover, two days ahead of schedule.
New cables have ben installed above and below the bridge deck on the five weakest spans of the 16 span structure. Amey now has one month to complete works to allow the structure to be fully reopened to all traffic. This includes waterproofing of the bridge deck, replacing the road surface and other ancilliary works.
The works, which began in January, have seen around 200m of the central reservation along the flyover removed, a new structural slab and concrete barriers installed, as well as tailored anchorages for the new cables installed within the structure. The new cables supplement the load capacity of the existing cables.
The new cables will be surrounded by wax oil to prevent deterioration and allow inspection and replacement if required in the future.
Work to strengthen the remaining 11 spans will take place next year under a new contract. This work will not require further weight restrictions to be imposed.