Extensometers

Instrumented Rock Bolts

A vibrating wire strain gauge is inserted into a short length of standard threaded rockbolt or rebar which can be connected to a longer length of the same material for installation in the normal manner, ensuring the strain gauge remains within the loaded part of the rockbolt. The gauge is read by a portable probe, connected to a strain gauge.

  1. Data Sheet
  2. Manual

Applications

  • Ungrouted rockbolts
  • Tiebacks used to stabilise ground around excavations & supporting retaining walls

Features

  • Robust – requires no special handling
  • Recessed VW gauge can be left unattended for long-term monitoring
  • The strain gauge is located along the axis of the rockbolt and so is not affected by bending of the bolt
  • Long-term stability and accuracy
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Tel: +98.41.33335117

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