Railway track inspection using GPR |
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| Authors: | J. Hugenschmidt |
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| Affiliation: | 1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China;2. Rail Transportation and Engineering Center (RailTEC), School of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, USA;3. Department of Civil Engineering, Queen’s University, 58 University Ave, Kingston, ON K7L 3N6, Canada;1. Department of Civil Engineering, School of Engineering, University of Birmingham, Birmingham B152TT, United Kingdom;2. Birmingham Centre for Railway Research and Education, School of Engineering, University of Birmingham, Birmingham B152TT, United Kingdom;1. Université Gustave Eiffel, MAST/EMGCU, 5 Boulevard Descartes, 77454 Marne-la-Vallée cedex 2, France;2. University of Minho, ISISE, Department of Civil Engineering, Guimarães, Portugal;3. Universidad Politécnica de Cataluña, EEBE School, RMEE Department, Barcelona, Spain;4. CINTECX, GeoTECH Research Group, Universidade de Vigo, Vigo, Spain;5. University Lusíada, Norte, Largo Tinoco de Sousa, Vila Nova de Famalicão, Portugal;6. National Laboratory for Civil Engineering (LNEC), Transportation Department, Lisbon, Portugal;7. CWRR, School of Civil Engineering, University College Dublin, Belfield, Dublin 4, Ireland;8. Setec Group, Structural and Geotechnical Health Monitoring Department, LERM, Paris, France;1. Fugro B.V., Utrecht, the Netherlands;2. Delft University of Technology, Delft, the Netherlands |
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| Abstract: | Swiss Federal Railways (SBB) inspect their railway tracks at regular intervals. The first step of track renewal planning is a geotechnical study. Inspection is focused on the thickness of the ballast, on subsoil material penetrating upwards into the ballast and on geotechnical properties of subgrade and subsoil materials. Up to now, the inspection has been done mainly by digging trenches at evenly spaced intervals and in locations of special interest. In order to evaluate the benefits and limits of GPR railway track inspections, three GPR surveys were carried out on three different railway lines. Data were acquired using a mobile system travelling at 10 km/h. Subsequent to radar data acquisition, trenches were dug. The positioning of some of the trench locations was based on preliminary GPR results in order to support the interpretation of GPR data. Only those trenches were available during interpretation of radar data. In addition, SBB performed their usual investigation programme. This provided an opportunity for checking the radar results in great detail. |
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| Keywords: | GPR Railway track inspection Ballast inspection Non-destructive testing |
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