SEmG

Railway Structures
Pre-stressed Concrete

Cottage bridge, Selhurst, photographed on 20th August 2009.

photograph by Gregory Beecroft

Cottage bridge, Selhurst

Cottage Bridge came into use in October 1983 to carry the new slow lines between Selhurst and East Croydon over the Norwood Junction to West Croydon line. The four spans comprise pre-stressed concrete beams. The relatively short spans meant that the beams could be lifted in without extended possessions of the tracks below.

Southerham bridge, Lewes Southerham bridge, Lewes, photographed on 2nd August 2009.

photograph by Gregory Beecroft

 
Southerham bridge, Lewes.

photograph by Gregory Beecroft

Southerham bridge, Lewes

Southerham bridge carries the railway over the River Ouse between Lewes and Southerham Junction. The deck comprises a series of concrete beams.

Southerham bridge, Lewes Southerham bridge.

photograph by Gregory Beecroft

 
Southerham bridge, Lewes.

photograph by Gregory Beecroft

Southerham bridge, Lewes

The piers on each bank are very substantial, but are raised off the ground and supported on metal bearings.

Southerham bridge, Lewes Southerham bridge, Lewes.

photograph by Gregory Beecroft

There are two river piers. Foundations for these were created by driving steel piles into the bed of the river to form an enclosure. These were then excavated out and filled with concrete. This detail is only evident when the water level is low.

Holmethorpe Relief Road bridge, photographed on 25th August 2007.

photograph by Gregory Beecroft

Holmethorpe Relief Road bridge

The Ormside Way underbridge carries the Brighton line over the Holmethorpe Relief Road. The bridge was constructed alongside the railway by Hochtief in 2004. The 17 metres span is integral with the abutments and wingwalls, so that the entire 1,500 tonnes structure could be rolled into position during a possession of 104 hours. The embankment was removed on Christmas Day and the bridge moved into place on transporter bogies during the night. The embankment was backfilled during Boxing Day. Two further days were required for reinstatement and testing of track, signalling and power supplies.

First Pre-stressed Concrete

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This page was created 9 January 2010

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