Buchan lays it on the lining

The Docklands Light Railway (DLR) in London, UK, is being extended 2.5km from its present north Woolwich terminus to Woolwich Arsenal, south of the Thames. The extension will be constructed and operated by a joint venture comprising the AMEC Group and the Royal Bank of Scotland. Designed by Halcrow, the 3.5-year project began with the boring of two parallel tunnels under the river using a 6m-diameter Lovat earth pressure balance tunnel boring machine. The precast concrete tunnel lining segments are being manufactured by Buchan Concrete Solutions at a new precasting factory at King George V Dock, close to the tunnel portals. Sustainability issues are a key feature of the project. Segments are manufactured with steel-fibre reinforced concrete, incorporating polypropylene monofilament fibres to increase fire resistance and 30% pulverised-fuel ash replacement of cement. Ring-to-ring connection uses the Buchan plastic 'Buclock' system. Ground conditions include alluvium, organic silt, clay and peat bands, river terrace gravels, Thanet Sand and chalk. (A)

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01043384
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Mar 6 2007 9:02AM