DESIGN FEATURES OF THE BOTLEK RAIL TUNNEL IN THE BETUWEROUTE

This paper describes the design features and construction method of the Botlek Rail Tunnel, the most westerly of the three bored tunnels on the Betuweroute in the Netherlands [see IRRD E102766]. The ground consists of dredged fill, and layers of silts, sands, and clays, under ground water. The tunnel will be 3000m long and go under the River Oude Maas, with an overburden there of only about 7m. The tunnel will have two tubes, each lined with one layer of reinforced concrete segments, which must have high quality, because the tunnel has 100 years design life. There are three cross-passages between the tubes, and entry and exit shafts. The tunnel is being constructed using a Herrenknecht earth-pressure balance (EPB) shield as tunnel boring machine (TBM). The paper describes the TBM characteristics and the following other aspects of the tunnel construction: (1) muck transport system; (2) ground conditioning; (3) creation of a grouted zone in front of the shield; (4) ground investigations under the shield; and (5) difficulties in using mass balance in settlement control. The difficult ground conditions, combined with high water pressures and the single-layer lining system, required innovative research and development. The experience gathered will create new criteria and standards for future projects.

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  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Maidl, U
  • Publication Date: 1999

Language

  • English

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Filing Info

  • Accession Number: 00779410
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Dec 7 1999 12:00AM