3D Laser Scanning as Applied to Subway Tunnel Inspections Techniques for Gathering, Documenting and Managing Inspection Data

摘要

Mass transit agencies have found, increased operational hours have severely limited the time periods available for tunnel inspection teams. One Baltimore Mass Transit agency teamed with a consulting firm, to think outside the box and develop a viable solution to this situation. 3D laser scanning was initially considered for its ability to record the tunnel liner condition. The data from the scanner was combined with "off-the-shelf-software" (CAD, rail design software and Excel spreadsheet) to develop a system for documenting and managing tunnel inspection data. Current maintenance methods are manually intensive, involving numerous cross referencing of the data. The full process includes collection, documentation, analysis, prioritization, plan preparation, advertisement, award, repair, inspection and records upkeep. The decision to incorporate the 3D scanner into the process, with its ability to record spatial data so completely seemed like a natural fit. As the workflow developed, it became apparent that the inspection process could be significantly streamlined, with the application of this and other technologies.