Construction Monitoring Control Systems Ltd

Tel/Fax  01923 682300
 
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  1. Index
  2. CMCS at BRE
  3. Development of AMS
  4. Non-destructive testing of Marine Jetties
  5. Fixed sensor monitoring of Diaphragm walls
  6. Monitoring Buildings during Redevelopment
  7. Tunnel Monitoring
  8. Embankment Systems
  9. Loggers
  10. Tunnel Distortion Monitoring
  11. In-place tilt monitoring system
  12. Tunnels Interaction System
  13. Re-Development of Small Properties
  14. Viaducts
  15. DLR at Mansion House
  16. Tunnel Monitoring System (Discrete beams)
  17. CTRL 240
  18. Dams
  19. Electro-levels
  20. Movement indicators
  21. Results of Charing Cross Load Cells
  22. Non-destructive testing of concrete structures
  23. Radio in Construction Monitoring
  24. Settlement Reducing Piles
  25. Land Surveying and Total Station Monitoring
  26. Vibration Monitoring
  27. Monitoring the complete strain history of concrete elements
  28. Past CMCS Projects

During the construction of the Second Severn Crossing, the approach roads crossed the 150 year old railway tunnel. To protect the tunnel, piled abutments were constructed either side to support a road bridge. During the driving of the piles CMCS monitored the effects o the tunnel lining. The results showed that the peak particle velocities (PPV) were greater from the trains than from the piling.

CMCS monitored the vibrations caused by the traffic and the use of a heavy breaker within 5 m of some of the support columns of the elevated section of the Harrow Road - no harmful effects were recorded.

The photograph and sketch opposite illustrate a project where CMCS have supplied vibration monitoring equipment and advice on a new development in Edinburgh.

Peak Particle Velocities allowed vary from: 2 - 5 - 10 - 40 mm/second depending on the state and historic value of the building. The larger value relates to concrete and steel commercial buildings. (Human response to vibration requires additional consideration).

 
 
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