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.
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
