Renovation Of The Deck Of A Major Listed
Bridge Structure
Author(s)
R. Brueckner & P. Lambert
Abstract
The Silver Jubilee Bridge in the UK crosses the River Mersey between Runcorn
and Widnes. It was completed in the early 1960s and is an English Heritage
Grade II listed structure. It forms part of the major highway route in North West
England and carries over 90,000 vehicles per day on four lanes. The original
design carried a single lane in each direction, plus a single central shared
overtaking lane. This was widened to carry two narrow lanes in each direction
during the late 1970s.
The central span of the bridge is a 330m long steel arch structure with two
76m side spans and is the largest of its type in Europe. The deck is reinforced
concrete supported on structural steelwork. The original surfacing was hand
placed mastic asphalt. This provided some degree of waterproofing, but
remained in place for over 40 years until a new waterproofing and surfacing
system was installed in 2005. By this time the bridge deck was heavily
contaminated with chlorides from de-icing salts and the reinforcement was found
to be corroding in many areas.
To maintain and extend the functionality of the bridge, avoid major
disruptions to this major river crossing over the Mersey and to preserve the
Grade II listed character, it was necessary to identify a durable but sympathetic
repair strategy. This paper will discuss the many options considered and the
eventual adoption of a novel and subsequently award winning cathodic
protection system specifically developed for this application.
Keywords: cathodic protection, grade 2 listed, bridge, corrosion, concrete, steel,
repair.
Keywords
cathodic protection, grade 2 listed, bridge, corrosion, concrete, steel,
repair
Related Book
Other papers in this volume
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