This article describes the construction of the Caluire Tunnel, carrying a key section of new motorway around the northern side of the city of Lyon, France. The world's largest earth pressure balance (EPB) tunnel boring machine (TBM), with 11.02m diameter, has been operating in very difficult ground to drill the 3.250km long tunnel, which has twin tubes each with 9.78m final diameter. The route of the tunnel passes under the River Saone and below the hill of Caluire; at its deepest, it is about 80m below the surface, but the cover between its crown and the river bed is at most 28m. Each tube will take two lines of traffic, with linking passages every 800m for traffic and every 400m for pedestrians. The lining consists of 2m long 440mm thick prefabricated concrete sections; the 16mm space between the lining and the tunnel wall will be filled with grout. The choice of an EPB TBM was determined partly by the different types of ground which it will have to handle. Lyon has a very complex geology, and the ground through which the tunnel will pass includes schists, gneiss, soft clays, conglomerates, fine sands, and alluvial gravels. The TBM is sufficiently adaptable to be used effectively in all these types of ground.

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    LONDON,   United Kingdom  EC2A 2HD
  • Authors:
    • MONRO, M
  • Publication Date: 1995-10


  • English

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Filing Info

  • Accession Number: 00719886
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Apr 26 1996 12:00AM