Japan's answer to problems resulting from the use of the New Austrian Tunnelling Method (NATM), wasteful rebound, hazardous, and dusty working conditions, is the Nippon Tunnel Lining Method (NTLM). This method provides a primary lining designed to prevent loosening of the ground by sealing up the uneven excavated surface with the circular thin layer of the supporting concrete, maintains the strength of the ground against weathering, deterioration and failure caused by the concentration of stress on the excavated surface and ensures even distribution and reduction of earth pressure on the main lining. Several circular travelling forms, trowel forms and arch forms are described. Each method shows no loss of material due to rebound and no dust.

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  • Corporate Authors:

    Morgan-Grampian (Construction Press) Limited

    Morgan-Grampian House, 30 Calderwood Street
    London SE18 6QH,   England 
  • Authors:
    • Martin, David
  • Publication Date: 1989-12

Media Info

  • Features: Figures;
  • Pagination: p. 50-51
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00491319
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 28 1990 12:00AM