Scour Critical Bridge Case Study: Wireless Tilt, Wireless Water Level Sensors and Camera on Continuous Span Concrete Girder Bridge

Monitored variables and members: piers tilt (incline; roll and pitch), water level of the river under the bridge, camera

Bridge Structure:  The two west/east-bound bridges over river consists 7 piers and 2 abutments.

 

sample 8

Continuous span girder bridge

Installed Devices: a Resensys structural health monitoring system that was deployed on the structure consists inclinometer 2d (tilt) and level meter SenSpot sensors. Inclinometer SenSpot sensors also measure temperature in real time. Also, a wireless camera was deployed on the bridge. SeniMax data logger with remote communication gateway were installed to collect data from SenSpot gauges and send them to main server and SenScope.

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Inclinometer (Tilt) SenSpot sensor

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Wireless ultrasonic water level sensor

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  Wireless Camera

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SeniMax Gateway

Monitoring Purposes and Methods:

  • Inclinometer 2d (tilt) SenSpot sensors monitor pitch and roll of the piers.
  • Detect pier instability hydraulics damage and scour condition
  • Obtaining dependency of pitch and roll on temperature variations by performing regression analysis.
  • Calculating and implementing temperature linear regression alert levels of roll and pitch for each device (2D-Alert Levels).
  • Measuring water level of the river under the bridge by Level Meter

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