This article reports the March 2000 meeting of the British Tunnelling Association, which discussed tunnelling works on Contracts 102 and 104 for London Underground's new Jubilee Line Extension (JLE). Each contractor had chosen sprayed concrete linings as an integral part of the station and interchange construction process. They were especially suitable for the labyrinthine network of shafts, connecting tunnels, and escalators, many with awkward curves and junctions. Valuable lessons were learned from the collapse of a tunnel under construction at Heathrow Airport, which had led to the halt of JLE tunnel construction to allow reviews and redesign. The speakers reported in context the redesigns, which emerged to allow the renewal of construction. They also discussed various aspects of compensation grouting, and described some of the more important temporary works designs. Contract 102 covered the JLE section from Green Park Station to Waterloo Station, which included line tunnels, platform tunnels, a deep station box at Westminster, and interchanges with existing underground lines at Westminster and Waterloo. Contract 104 covered the extension of London Bridge Station to include not only the JLE, but also upgrade the Northern Line, modernise the whole interchange, and build a new ticket hall.

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  • Corporate Authors:

    Miller Freeman

    Calderwood Street
    London,   United Kingdom  SE18 6QH
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  • Publication Date: 2000-6


  • English

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Filing Info

  • Accession Number: 00798043
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Sep 8 2000 12:00AM