Lifting begins as a new utility bridge is installed before Power Road Bridge is replaced. TfL
The partnership between Ramboll and Parsons Brinckerhoff will see the two consultancies developing designs for reconstruction and refurbishment work on a number of TfL structures and tunnels (STIP) during the next few years.
Work can now begin to replace Power Road Bridge which carries the A406 North Circular Road (Gunnersbury Avenue) over the Network Rail track following the successful installation of a new service bridge by TfL and contractor Hochtief (UK). The new service bridge is the first of three key phases of work to be completed in TfL’s £35m project to rebuild Power Road Bridge. The old bridge has reached the end of its operational life and is beyond simple repair.
Power Road Bridge is one of the eight structures to be improved or replaced in the Structures and Tunnels Investment Portfolio (STIP), which is part of TfL’s £4bn Road Modernisation Plan to improve London's roads. TfL appointed Ramboll and Parsons Brinckerhoff in a joint venture as designers on all eight projects.
The new service bridge is designed to last 120 years and will divert utilities (gas, electricity, water and telecommunications) from the existing carriageway. This will reduce the need to close traffic lanes on the road bridge during future maintenance of utility pipes or cables.
The service bridge was fabricated in Bolton and was transported to Power Road Bridge using a specialist bridge transporter. It is 30m long and the main girders are two metres deep with an additional 1.5m parapet on top. The six bored piles supporting the service bridge are approximately 20m in depth and were constructed with 200 tonnes of concrete.
Click the following image to see the 30 second timelapse video of the service bridge installation.
TfL is replacing the three span Power Road Bridge, which carries the A406 North Circular Road (Gunnersbury Avenue) over two Network Rail lines. This complex project involves diversion of utilities onto a new service bridge, and highway bridge deck demolition and replacement works without the need for road closure.
The London 2012 Summer Olympic and Paralympic Games was Britain's largest peacetime logistical exercise and a major challenge for Transport for London (TfL). London's road network had suffered decades of under-investment preceding TfL’s ownership, and the highest priority structures had to be in a state of good repair before the Games began.