Abstract
A project to replace a bridge across the River Severn between Highley and Alveley in Shropshire, UK is described. The early reinforced concrete, balanced cantilever bridge is in poor condition with heavy spalling of the concrete. It carries the Route 45 national cycleway and enables access onto a country park built on the site of the old Highley Colliery. The new bridge will be built alongside the existing bridge. Mowlem was appointed as contractor to design and build a new three-span, continuous, reinforced concrete bridge. The provision of a curved, painted steel parapet with tubular rails was specified. The side spans were cast in situ. The ribs and diaphragm beams for the central span were constructed on a specially prepared casting bed on the Alveley bank and lifted into place using a mobile crane. Hydraulic jacks were used to adjust its level. The bridge was designed to accommodate a reasonable amount of movement as the Highley bank is susceptible to geological movement. Construction was started in 2005.
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