B. Benmokrane et al., MONITORING BEHAVIOR OF GROUTED ANCHORS USING VIBRATING-WIRE GAUGES, Journal of geotechnical engineering, 121(6), 1995, pp. 466-475
Long-term monitoring of the behavior of ground anchors constitutes an
important aspect of the stability of structures reinforced by such str
uctural members. The present paper describes full-scale tests performe
d on three instrumented grouted anchors in the laboratory and one othe
r instrumented anchor in the field. Due to the long-term reliability,
stability, and accuracy, two types of surface-mounted vibrating wire g
auges were used to instrument the anchors. A series of vibrating-wire
gauges were microwelded on the anchors at certain intervals along thei
r lengths. The performance of these gauges, the load transfer mechanis
m, the debonding process, creep behavior, and long-term performance of
the anchors under loading, unloading, and sustained loading, were inv
estigated in the laboratory. A practical application and test results
of an instrumented anchor at Jeffrey Mine in Asbestos, Canada, are des
cribed. The results obtained show that this instrumentation technique
of grouted anchors is efficient for long-term monitoring.