Following a description of the first attempt at a channel rail tunnel crossing in 1874 a detailed account is given of the present project under construction. Details are given of the construction and engineering companies involved and of the cost and timescale. The tunnel design and alignment through various geological formations are outlined and rate of progress estimated. Reasons are listed for the choice of reinforced concrete segmental preformed linings. The tunnel boring machines in use are listed and their method of operation described. Other equipment considered includes the computer-controlled laser guidance systems, mortar backfill systems, pilot hole diggers, crosscut diggers, boom cutter loaders, generators and office accommodation. Spoil disposal involves the removal of a 65% solids mixture from the face to coastal lagoons utilising a variety of vehicles. Details are given of the cost of the project, finances and fines for any delay in handing over. Models are described which have been commissioned to aid design and for use in public relations exercises. It is commented that industrial relations are likely to cause the only hold-ups. (TRRL)

  • Availability:
  • Corporate Authors:

    Mining Journal Limited

    60 Worship Street
    London EC2A 2HD,   England 
  • Authors:
    • Smith, M
  • Publication Date: 1988-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00492832
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1990 12:00AM