An engineering classification of jointed rock masses, termed the geomechanics classification, is proposed which is characterized by the following features: 1. Best aspects of previously used classification systems are incorporated. 2. It is based on properties of rick materials and rock masses. 3. It is functional (it can be applied to solutions of practical engineering problems). 4. Standard terms are employed. 5. A rating system is provided to weigh the relative importance of various classification parameters. The geological parameters which the engineer needs for his design are specified and the reasons therefore are explained. The functional feature of the geomechanics classification is demonstrated by applying it to the selection of primary support in tunnel design. The proposed classification system is based on a detailed study of all existing major rock classifications, on personal discussions with many overseas specialists in this field and on experience gained in numerous visits to construction sites aboard and in South Africa, where various classification systems has been used. /Author/

  • Availability:
  • Corporate Authors:

    South African Institute of Civil Engineers

    Kelvin House, 75 Marshall Street
    Johannesburg,   South Africa 
  • Authors:
    • Bieniawski, Z T
  • Publication Date: 1973-12


  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 353-343
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00260051
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 5 1974 12:00AM