Detection of High-Speed Railway Subsidence and Geometry Irregularity Using Terrestrial Laser Scanning
Publication: Journal of Surveying Engineering
Volume 140, Issue 3
Abstract
Subsidence and geometry deformation monitoring are essential for safe transportation on a high-speed railway. Terrestrial laser scanning (TLS) is able to collect dense three-dimensional point data from the survey scene and achieve highly accurate measurements; therefore, it is considered to be one of the most promising surveying techniques for railway track geometry deformation monitoring. This paper proposes a new approach that uses TLS to detect subsidence and irregularities in a track by fitting boundaries of the cross section of the track. In addition, for a section of local railway, an outdoor experiment was performed to ascertain the feasibility and accuracy of this method. The deformations detected with TLS were compared with the field measurements gathered with other methods such as those from a track inspection car. The results indicate that the subsidence difference between TLS and precise leveling is 2–3 mm, and the difference in the geometric parameters of the tracks is 1–2 mm. Finally, the possible causes of error involved with TLS are discussed.
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Acknowledgments
This work is supported by the National Natural Science Foundation of China (Nos. 41371333 and 41101382) and the National Basic Research Program of China (No. 2013CB733204). The authors thank the German Society for Tianjin Railway Survey Design Institute Group for allowing surveying of the high-speed track and providing assistance in the field laser scanning.
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Published In
Journal of Surveying Engineering
Volume 140 • Issue 3 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Feb 14, 2013
Accepted: Dec 10, 2013
Published online: Dec 12, 2013
Published in print: Aug 1, 2014
Discussion open until: Aug 20, 2014
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