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CHANNEL TUNNEL RAIL LINK CONTRACT 103,KING'S CROSS CIVIL WORKS, NORTH LONDON

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BCI AWARDS - MAJOR PROJECT

For building and civil engineering projects valued at over £50 million.

Sponsored by HSE, the Health & Safety Executive.

The Channel Tunnel Rail Link (CTRL) civil works on the King's Cross 'railway lands' was constrained by the interconnecting geometry of the new high-speed line with the Grand Union Canal plus existing live, relocated and new rail lines weaving across and under the site. Much of the area consisted of semi-derelict rail yards with strategically important ready-mix concrete plants and a major road that had to be relocated to -t around the new lines.

The main chord of the CTRL emerges from tunnels at the north-east of the site, crosses the East Coast Main Line (ECML) on a steel-truss bridge and climbs on to an embankment leading into the new high-level extension of St Pancras Station at the southwest corner. Branching from this, a ying junction was built to link into the North London Line (NLL) at the north-west extremity, creating a through rail connection to the West Coast Main Line.

A chord linking the ECML with the NLL had to be totally rebuilt across the north of the railway lands to make space for the CTRL lines. Cutting through all this work, two large tunnels had to be bored from north east to south west to carry the Great Northern regional rail service under the CTRL and canal to connect with Thameslink beneath the extension of St Pancras.

Client Union Railways (North) Cost £150 million Principal designer Rail Link Engineering Contractor Kier Construction/ Edmund Nuttall JV

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