Concrete has been used extensively for reconstruction or repair of old structures.
Concrete segments are often used for reconstructing arch bridges, in order to give better clearance. This may be necessary in connection with overhead electrification or to enable larger freight containers to be used. Many bridges on the routes to the Channel Tunnel have been enlarged in this way, including Pluckley Road bridge, Charing (above left) and Station Road bridge, Staplehurst (above right).
It is less usual for underbridges to be rebuilt in this way. However, the former brick arch bridge at Mill Road, Patcham has been.
A series of small underbridges near between Leatherhead and Dorking have had their decks renewed with pre-cast concrete components. This bridge spans Cowslip Lane, north of Box Hill & Westhumble.
This arch at Folkestone Harbour has been strengthened by the addition of concrete segments inside the original brick rings.
Bridge 70A, Croham Road, South Croydon has been strengthened with the two inner arch rings replaced in concrete. This is the original London & Brighton Railway bridge, which now carries the slow lines.
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This page was created 9 January 2010