As part of the initial investigation for the Highways Agency of proposed improvements to the A167, south of Durham, it was necessary to collect discontinuity data in areas of proposed rock cutting, remote from rock exposures. A trial was therefore carried out to compare available techniques for measuring discontinuity data from boreholes. Comparison of results obtained from impression packer, CCTV, local exposures and the core orientator system are presented. The core orientator system relies on a pendulum which on an inclined borehole under gravitational force locates the lowest point of the core. The system is described fully within the paper. (A) For the covering abstract see IRRD 883023.


  • English

Media Info

  • Features: References;
  • Pagination: p. 306-11

Subject/Index Terms

Filing Info

  • Accession Number: 00729274
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-7277-2513-0
  • Files: ITRD
  • Created Date: Dec 12 1996 12:00AM