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Instrumented Rock Bolts
For long or short-term monitoring of strata loads.
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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:
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Robust – requires no special handling |
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Recessed VW gauge can be left unattended for long-term monitoring |
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The strain gauge is located along the axis of the rockbolt and so is not affected by bending of the bolt |
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Long-term stability and accuracy |
Measures loads in:
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Ungrouted rockbolts |
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Tiebacks used to stabilise ground around excavations & supporting retaining walls |
