The article describes the concept of the so-called New Austrian Tunnelling Method (NATM). While it is not a method of excavation with permanent support, the NATM should be considered as constructing a tunnel on the basis of scientifically established principles proved in practice. The NATM concept is based on mobilizing the bearing capacity of a rock mass so that optimum safety and economy can be achieved. The article mentions some of the most important of the 22 principles which characterize the NATM. A number of tunnel design weaknesses are discussed which have led to construction difficulties. These include - lining too thin; delayed ring closing; failing to close the invert; and, destruction of the rock mass. /TRRL/

  • Availability:
  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Muller, L
  • Publication Date: 1978-10

Media Info

  • Features: Figures; References;
  • Pagination: p. 29-32
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00194137
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: May 26 1979 12:00AM