STABILIZATION OF FISSURED ROCK MASSES BY GROUTED STEEL BARS

STABILISATION DES MASSIFS ROCHEUX FISSURES PAR BARRES D'ACIER SCELLEES

The practical use of passive steel rock bolts grouted along their entire length for the consolidation of fissured rock masses has made it possible to demonstrate the effectiveness of such a procedure. The aim of the study described in this report was to arrive at a better understanding of the mechanism of operation of this type of anchorage. Initially a study is made of the behaviour under shear of the surfaces of discontinuity of rock masses, which constitutes basic data for the stability of these masses. A description is given of an experimental study carried out in the laboratory on the model of a joint reinforced with a passive anchorage, in which the following parameters were varied: mechanical characteristics of the steel used for the anchorage; characteristics of the grouting material; compressive strength of the rock; the inclination of the bar at the joint; surface conditions of the discontinuity. This study makes it possible to develop methods for the evaluation of the additional strength gained with a passive anchorage placed perpendicularly to a smooth joint. /TRRL/

  • Availability:
  • Corporate Authors:

    Central Laboratory of Bridges & Highways, France

    75732 Paris,   France 
  • Authors:
    • Azuar, J J
  • Publication Date: 1977-11

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00302873
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS
  • Created Date: Dec 29 1979 12:00AM