Encyclopedia of Engineering Geology

2018 Edition
| Editors: Peter T. Bobrowsky, Brian Marker

Rock Bolts

  • Alberto OrtigaoEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-319-73568-9_241


Tension elements designed to resist tension forces in the rock, usually made of a steel bar installed in pre-drilled hole and grouted.


A rock bolt has the following elements:
  • Head is the anchor end outside the ground, comprising a plate, a nut, and a bearing plate.

  • Bonded length is the length that transmits tension forces to the ground.

  • Spacer is a plastic device, not always used to keep the tendon centered in the drill hole (Fig. 1).
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  1. Ortigao JAR, Brito H (2004) Anchors, bolts and nails, Chapter 11. In: Ortigao JAR, Sayao AFSFJ (eds) Handbook of slope stabilisation. Springer, Heidelburg. www.springeronline.com, 478 p

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.TerratekRio de JaneiroBrazil