HIGHWAY ROCK EXCAVATION . GROUND ENGINEERING AND BRIDGE RESEARCH. PAPERS PRESENTED AT STRUCTURES 90, TRANSPORT AND ROAD RESEARCH LABORATORY, CROWTHORNE, 25-26 APRIL, 1990

In this paper, the varied approaches to the design and excavation of hard rock are considered, and the research work, principles and techniques on which the current strategy relating to highways is based is briefly described. It is concluded that the stability of a rock face is determined by the levels of natural and induced instability present. Optimum stability is achieved by designing the rockface to minimise their levels. Minimum levels of natural instability are evaluated by carrying out stability assessments using discontinuity data collected in the field. Induced instability is minimised by excavating using a technique which does not impart damage to the design slope. Presplit blasting is an example of such a technique, and the method is outlined. Highway rock cutting designed and excavated in accordance with the principles outlined will have optimum stability and need minimum remedial treatment and maintenance. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Transport and Road Research Laboratory (TRRL)

    Wokingham, Berkshire  United Kingdom 
  • Authors:
    • Matheson, G D
  • Publication Date: 1990

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00612228
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Aug 31 1991 12:00AM