Structural survey, inspection and evaluation using LS technology
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Structural survey, inspection and evaluation using LS technology

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A presentation by Michael Xinogalos, Surveying Engineer NTUA 1988, Technical Director of ASTROLABE ENGINEERING at Innovative LIDAR Solutions Conference - Toronto 2009 (www.astrolabe.gr -......

A presentation by Michael Xinogalos, Surveying Engineer NTUA 1988, Technical Director of ASTROLABE ENGINEERING at Innovative LIDAR Solutions Conference - Toronto 2009 (www.astrolabe.gr - www.laseraction.eu)

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  • 1. Innovative LIDAR Solutions Conference June 24 - 26, 2009 - Toronto, CanadaStructural Survey, Inspection and Evaluation Using Laser Scanner Technology Michael Xinogalos Surveying Engineer NTUA ASTROLABE ENGINEERING / JGC
  • 2. Terrestrial Laser Scanning projects a. Bridge survey and structural deformation analysis b. Railway tunnel survey and structural inspection in comparison to theoretical geometry c. Survey and modelling of road interchanges for the design and evaluation of safety improvement measures
  • 3. Axios river motorway bridge
  • 4. Axios river motorway bridge
  • 5. Axios river motorway bridge
  • 6. Axios river motorway bridge Project tasks• Establishment of geodetic network (GGRS’87)• TLS survey with Optech ILRIS36D: • 6 scanning positions (from newest bridge) • Average resolution 2-3 cm • Georeferencing: 6 scanning stations, 12 circular (d:50 cm) targets, additional “natural” control points• Conventional survey for remaining details (southern side)• Basic processing of TLS data and other measurements• 3D features collection (deck geometry, piers, road level, etc)• Geometric evaluation and deformation analysis
  • 7. Axios river motorway bridgeProcessing and Results
  • 8. Axios river motorway bridgeProcessing and Results
  • 9. Axios river motorway bridgeProcessing and Results
  • 10. Axios river motorway bridgeProcessing and Results
  • 11. Axios river motorway bridgeProcessing and Results
  • 12. Axios river motorway bridgeProcessing and Results
  • 13. Agios Stefanos railway tunnel
  • 14. Agios Stefanos railway tunnel
  • 15. Agios Stefanos railway tunnel Project tasks• Establishment of geodetic network (GGRS’87)• TLS survey with Optech ILRIS36D: • 8 scanning positions (6 inside – 2 outside) • Average resolution 1-2 cm • Georeferencing: 8 conical targets, additional control points• Conventional survey of ground surface above tunnel• Basic processing of TLS data and other measurements• 3D modelling of tunnel and ground above, H and V section extraction• Inspection in comparison to theoretical geometry
  • 16. Agios Stefanos railway tunnelProcessing and Results
  • 17. Agios Stefanos railway tunnelProcessing and Results
  • 18. Agios Stefanos railway tunnelProcessing and Results
  • 19. Agios Stefanos railway tunnelProcessing and Results
  • 20. Agios Stefanos railway tunnelProcessing and Results
  • 21. Agios Stefanos railway tunnelProcessing and Results
  • 22. Survey and modelling of road interchanges for the design and evaluation of safety improvement measures Project tasks (1/2)• Selection of “Reduced Safety” locations by the Maintenance Department (Greek Ministry of Public Works) For each location:• Establishment of geodetic network (GGRS’87)• TLS survey with Optech ILRIS36D and lifting device: • Approx. 10 scanning positions • Average resolution 5-10 cm • Georeferencing: scanning stations, conical targets
  • 23. Survey and modelling of road interchanges for the design and evaluation of safety improvement measures Project tasks (2/2)• Basic processing of TLS data and other measurements• Vector drawing and orthophoto creation as background for design• Design of safety improvement measures (additional lanes, vertical and horizontal signage, changes in traffic regulation, closure of secondary roads, etc.)• 3D modelling of design elements• Modelling of vertical signage (existing and new)• Generation of video fly - through and driving simulations (before-after)• Evaluation of design by the Maintenance Department and Local Authorities
  • 24. Survey and modelling of road interchangesfor the design and evaluation of safetyimprovement measures Processing and Results
  • 25. Survey and modelling of road interchangesfor the design and evaluation of safetyimprovement measures Processing and Results
  • 26. Survey and modelling of road interchanges for the design and evaluation of safety improvement measures Processing and ResultsBefore After
  • 27. Survey and modelling of road interchangesfor the design and evaluation of safetyimprovement measures Processing and Results
  • 28. Conclusions… Any questions?Visit: www.astrolabe.gr www.jgc.gr