Progress in tunnelling during the last decade is reviewed. Although the output in 1977 was 40 per cent below the peak level of 1973, it was significantly greater than that of 1970 and 1971. Recent major projects are mentioned but three quarters of the work was on sewers. No major breakthrough in tunnelling technique has occurred but there has been a steady incorporation of new techniques such as shotcreting and rock bolting in hard rock, and precast linings in soft ground. Full-face hard-rock machines are improving steadily and partial-face boom type machines are now widely used. Progress in research mentioned includes the large scale instrumentation used in observational tunnelling. Speed of tunnelling and lining erection are dominating influences requiring more detailed ground information. The author believes that tunnelling has survived the period of depression well and looks forward to tunnelling rates of 100 to 200 M of finished work per week which he thinks could be achieved by the end of the century.

  • Availability:
  • Supplemental Notes:
    • From the special Celebration Issue, 1978.
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • O'REILLY, M P
  • Publication Date: 1978

Media Info

  • Features: Photos;
  • Pagination: p. 11-12
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00194136
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: May 26 1979 12:00AM