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Railway surveying - A case study of the GRP 5000
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geoinformatik och Geodesi.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The GRP 5000 is a track measuring trolley capable of collecting track geometry data and performing clearance analyses based on laser scanning technology. The obtained laser data can also be used for as-built documentation, and the track recording functionality makes applications such as surveying, tamping assistance and slab track construction possible. The accuracy, huge data amount and time efficiency by which the system operates sets a new standard in railway surveying, and outdates traditional methods of manual and visual inspection. This thesis is a case study of the GRP 5000 with several objectives: a functional and technical description of the system is given; the accuracy of the system is evaluated, showing overall good values except for one of the sensors used; comparisons are made to other railway surveying techniques, such as track recording vehicles, manual devices and other track recording trolleys; possible improvements are pointed out, both based on comparison results as well as testing results. Finally, new and innovative ways of using the trolley, such as offtrack usage, as well as for the obtained laser data, such as GIS, maintenance aspects and CFD aspects, are examined.

Place, publisher, year, edition, pages
2011. , 53 p.
Trita-GEOFOTO, 11-001
, Trita-GIT, ISSN 1653-5227 ; 11-001
Keyword [en]
railway surveying, GRP 5000, laser scanning, lidar, applications, accuracy assessment
National Category
Environmental Analysis and Construction Information Technology
URN: urn:nbn:se:kth:diva-31747OAI: diva2:406184
Available from: 2011-04-08 Created: 2011-03-24 Last updated: 2011-04-11Bibliographically approved

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Engstrand, Andreas
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