A NEW TUNNEL ROOF SUPPORT SYSTEM WITH SPECIFIC REFERENCE TO THE BROVELLO TUNNEL

This paper describes the use of jet grouting with particular reference to the roof support of tunnelling excavtions in weak ground at the Brovello Tunnel in northern Italy. Details are given of the geology of the area. The particular problem at Brovello was the presence of numerous archaeological artifacts and the requirement for minimal settlement. The scheme chosen involved a combination of conventional minipiling and ground anchoring techniques, subvertical and inclined jet mixed columns for block ground stabilisation and subhorizontal jet mix columns for tunnel roof support. Details are given of the scope of the works and the construction sequence. The advantages of a jet mix shield are listed and include access to difficult areas, non-toxicity, permanence, minimal vibration, reduced noise and predictable results. For the covering abstract see IRRD 877168.

  • Availability:
  • Corporate Authors:

    THE GEOLOGICAL SOCIETY PUBLISHING HOUSE, UNIT 7

    BRASSMILL ENTERPRISE CENTRE, BRASSMILL LANE
    BATH,   United Kingdom  BA1 3JN
  • Authors:
    • KETTLE, C T
    • GANDAIS, M
  • Publication Date: 1995

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00722405
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 1-897799-28-4
  • Files: ITRD
  • Created Date: Jun 28 1996 12:00AM