Instrumented Rock Bolts

Instrumented Rock Bolts

For long or short-term monitoring of strata loads.
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.

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

Measures loads in:

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

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