Tunnelling Vibration Monitoring — Victorian Railway Viaduct
Kent
32
Sensors deployed
14 weeks
Monitoring period
3.2mm/s
Peak PPV recorded
The Challenge
Real-time wireless monitoring of a Victorian brick railway viaduct during adjacent tunnelling works for a new utility corridor. The asset owner required continuous structural monitoring with automated alerts throughout the tunnelling programme to satisfy Network Rail's asset protection requirements.
What We Did
32-sensor wireless monitoring network deployed across 6 spans of the viaduct, measuring vibration velocity, tilt, and crack width at critical locations. Sensors calibrated to Network Rail PPV thresholds. Continuous data streaming to a live dashboard accessible to the client's project team, with automated SMS and email alerts set at 80% and 100% of threshold values. Weekly condition reports issued throughout the 14-week programme.
The Outcome
No threshold exceedances recorded across the full 14-week monitoring period. Peak PPV recorded was 3.2mm/s against a 12mm/s threshold — providing the asset owner and contractor with documented evidence of structural integrity throughout works. Client maintained full programme confidence with zero unplanned stoppages or Network Rail interventions.
Project Details
- Location
- Kent
- Service
- Movement Monitoring
Related service
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