A description is given of research into the efficiency of present mechanical tunnelling methods, including use of full cut machines. Details are presented of the range of boring tools used, and the mode of tunnelling operation. Three artificial and four natural stones were used in the tests, and the experimental results are discussed. Fundamental characteristics of rock in relation to their natural setting are considered, also the determination of rock hardness, and the relaion between its properties and boring load. Track distance/specific energy used in boring process are presented graphically in the consideration of tunnelling efficiency. It is concluded from the tests that boring, ultimate load, boreability and optimal track distance can be related, and the conditions for optimising the tunnelling process by computer are presented. (TRRL) originally published in German in tunnelbau, ingenieurbau Strassenbau, 1978, vol 20, pt 11, P866-79. (TRRL) (TRRL)

  • Supplemental Notes:
    • This paper was originally published in German in Tunnelbau, Ingenieurbau Strassenbau, 1978, vol 20, pt 11, PB66-79.
  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Truemper, T
  • Publication Date: 1979-10-16

Media Info

  • Features: References;
  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00322067
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: TRRL 2783 Monograph
  • Files: ITRD, TRIS
  • Created Date: Jan 19 1981 12:00AM