|Concrete structures have sometimes been built using pre-cast
blocks, which are laid like stonework, but this is not an especially common
The London & South Western Railway built a number of viaducts using concrete blocks. These were pre-cast and then laid like masonry. Woolston and Derriton viaducts, on the Bude branch, still stand though they have been out of use since 1966. Calstock viaduct was by far the largest of these concrete block viaduct and is the only one to remain in operational use.
Weston Green bridge, between Surbiton and Esher has concrete block abutments and wing walls.
Bridge 90 at St Mary Cray was reconstructed when the railway was quadrupled in the 1950s. The massive abutments and wing walls are built of large concrete blocks on a reinforced concrete plinth. The abutments are wide enough to take a fifth track. The batter to the abutments is a pleasing design feature.
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This page was created 9 January 2010