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Real-Time Subsidence Monitoring Along I-70, Washington, PA

Implementing automated monitoring for real-time insight into subsurface and surface movement along I-70 in Washington, PA using TDR, tiltmeters, and GPS survey technology.

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Real-Time Subsidence Monitoring Along I-70, Washington, PA

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  1. Kevin M. O’Connor, P.E., Ph.D. www.geotdr.com

  2. Real Time Monitoring of Subsidence along I-70Washington, PAKevin M. O'Connor GeoTDR Subsidiary Geotechnical Consultants, Inc

  3. Dec 1999 Mar 2000 I-70 Mar 2000 Oct 2000

  4. Monitor subsurface movement using TDR

  5. TDR

  6. Mining Panel 4 South Mining Panel 3 South

  7. Monitor surface movement using tiltmeters and GPS survey

  8. Transient

  9. Residual

  10. radius of influence outside draw angle

  11. Outside angle of draw Outside angle of draw

  12. AUTOMATED MONITORING • Real time, automated monitoring versus periodic manual monitoring • Call back alarm

  13. Residual sag Residual sag Compression bumps Highway Damage

  14. Residual sag & curvature

  15. Compressive curvature and bumps

  16. www.geotdr.com

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