The use of hydraulic impact hammers over a range of activities from basic concrete breaking to full face tunnelling is described. Equipment development, low capital cost and high productivity has brought about its increasing use for the latter. The principles of hammer tunnelling are discussed suggesting that the only theorectical limit on its use is the rate of progress through a given type of rock. Mention is made of five tunnels being driven in Italy. The operation and equipment in use at two, the Rieti highway and Cape Nero rail tunnels are discussed in detail. A short account of the largest impact hammer, the rammer S86 is given and following some basic observations on the suitability of this method for the variety of applications the conclusion is drawn that hammer tunnelling will soon become a standard technique. (TRRL)

  • Availability:
  • Corporate Authors:

    Mining Journal Limited

    60 Worship Street
    London EC2A 2HD,   England 
  • Authors:
    • Smith, M
  • Publication Date: 1988-3

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00492834
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Mar 31 1990 12:00AM