| Téléchargement | - Voir la version finale : Lessons learned from long-term frost heave monitoring under a railway embankment (PDF, 1.0 Mio)
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| Auteur | Rechercher : Roghani, A.1; Rechercher : Caldwell, Robert1; Rechercher : Hiedra-Cobo, Juan2; Rechercher : Charbachi, Paul |
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| Éditeur | Rechercher : Canadian Rail Research Laboratory |
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| Affiliation | - Conseil national de recherches du Canada. Automobile et les transports de surface
- Conseil national de recherches du Canada. Construction
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| Format | Texte, Article |
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| Conférence | Canadian and Cold Regions Rail Research Conference, CCRC 2021, November 9-10, 2021, Virtual Event |
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| Résumé | Frost heave is a major issue for railway tracks constructed in cold regions that degrades track geometry and may affect the safety of railway operations. Canadian railway operators perform frequent maintenance during winter to eliminate track deformation and ensure the safe passage of trains. In early spring, frequent maintenance such as tamping and surfacing are required to alleviate the surface deformation due to thawing. Freeze-thaw cycles are expected to become more frequent under future climate conditions and thus a greater understanding of this phenomenon is essential to develop adequate mitigation measures in the face of a changing climate. National Research Council Canada in collaboration with VIA Rail Canada has conducted a 3-year field investigation to study the mechanism of frost development and its impact on safety and performance of train operations. In this project, a 50 m section of track in eastern Ontario was instrumented with various geotechnical and structural monitoring systems. In addition, measurements from ground penetrating radar and a track geometry car were collected over 90 km of track to map frost-susceptible sections of track and quantify its effect on track geometry degradation. The difference in winter conditions during the monitoring period (which consisted of two freeze-thaw seasons) in terms of temperature and snow on ground, induced different temperature regimes within the track substructure and led to different track responses. This paper summarizes some of the major lessons learned during the field observation period and discusses how the expected future climate may adversely affect the frost heave issues. |
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| Date de publication | 2021-11-09 |
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| Maison d’édition | University of Alberta. Deptment of Civil & Environmental Engineering |
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| Licence | |
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| Dans | |
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| Autre format | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 7a8c7eea-8cef-424a-b991-3c8cf6de208d |
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| Enregistrement créé | 2022-09-16 |
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| Enregistrement modifié | 2022-10-04 |
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