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P. Pereira¹, A. Gay Neto², R. Dos Santos Motta¹, L. Bariani Bernucci¹, E. Moura¹ and R. Silva³

¹Department of Transportation, University of São Paulo, Brazil
²Department of Structural and Geotechnical Engineering, University of São Paulo, São Paulo, Brazil
³Railways Engineering, Vale S.A., Vitória, Brazil

doi:10.4203/ccc.7.18.3

P. Pereira, A. Gay Neto, R. Dos Santos Motta, L. Bariani Bernucci, E. Moura, R. Silva, "The Effects of Different Types of Tamping Operations on the Degradation of Railway Track Geometry", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 18.3, 2024, doi:10.4203/ccc.7.18.3

Keywords: railway track, heavy haul line, maintenance, monitoring, tamping operation, geometric degradation.

Abstract

Throughout the accumulation of transported loads, the railway track accumulates geometric defects that can negatively impact its mechanical behavior, reducing the useful life of its components. These geometric defects can become more pronounced after construction, ballast cleaning, or total renewal. In such scenarios, efficient tamping is crucial to prevent the accelerated appearance of geometric defects. Some studies have demonstrated increased track stability with multiple insertions of tamping tines, when compared to single insertion, in such track conditions. However, the impact on geometric quality and its degradation rate still requires assessment. The present study evaluates the impact of applying tamping of single or multiple insertions on the track geometric quality and its degradation rate. For this, sections of the Carajás Railway had their geometric parameters monitored immediately after the renewal process until an accumulation of 195.8 million gross tons. Geometric degradation was modeled using linear, exponential, and logarithmic regressions on the geometric dataset. Among these, logarithmic regression demonstrated the best fit. Multiple insertion demonstrated a lower rate of geometric degradation, despite presenting lower initial geometric qualities. Future investigations will evaluate if this phenomenon is directly attributable to the tamping type or to characteristics associated with the experimental section.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 7 PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 18.3 The Effects of Different Types of Tamping Operations on the Degradation of Railway Track Geometry P. Pereira¹, A. Gay Neto², R. Dos Santos Motta¹, L. Bariani Bernucci¹, E. Moura¹ and R. Silva³ ¹Department of Transportation, University of São Paulo, Brazil ²Department of Structural and Geotechnical Engineering, University of São Paulo, São Paulo, Brazil ³Railways Engineering, Vale S.A., Vitória, Brazil doi:10.4203/ccc.7.18.3 Full Bibliographic Reference for this paper P. Pereira, A. Gay Neto, R. Dos Santos Motta, L. Bariani Bernucci, E. Moura, R. Silva, "The Effects of Different Types of Tamping Operations on the Degradation of Railway Track Geometry", in J. Pombo, (Editor), "Proceedings of the Sixth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 7, Paper 18.3, 2024, doi:10.4203/ccc.7.18.3 Keywords: railway track, heavy haul line, maintenance, monitoring, tamping operation, geometric degradation. Abstract Throughout the accumulation of transported loads, the railway track accumulates geometric defects that can negatively impact its mechanical behavior, reducing the useful life of its components. These geometric defects can become more pronounced after construction, ballast cleaning, or total renewal. In such scenarios, efficient tamping is crucial to prevent the accelerated appearance of geometric defects. Some studies have demonstrated increased track stability with multiple insertions of tamping tines, when compared to single insertion, in such track conditions. However, the impact on geometric quality and its degradation rate still requires assessment. The present study evaluates the impact of applying tamping of single or multiple insertions on the track geometric quality and its degradation rate. For this, sections of the Carajás Railway had their geometric parameters monitored immediately after the renewal process until an accumulation of 195.8 million gross tons. Geometric degradation was modeled using linear, exponential, and logarithmic regressions on the geometric dataset. Among these, logarithmic regression demonstrated the best fit. Multiple insertion demonstrated a lower rate of geometric degradation, despite presenting lower initial geometric qualities. Future investigations will evaluate if this phenomenon is directly attributable to the tamping type or to characteristics associated with the experimental section. download the full-text of this paper (PDF, 14 pages, 1146 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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