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N. Calon, A. Robinet, V.N. Trinh, "Trackbed Evolution on the French Railway Network", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 47, 2014. doi:10.4203/ccp.104.47

Keywords: tracked, railways, interlayer, performance.

Summary

The aim of this paper is to show the evolution of the trackbed design of railway platforms from the 19th century to the present. In France, there are more than 30,000 kilometers of operational classic lines in use and 2,000 kilometers of high speed lines (HSL). Initially, the classic lines were built without standards and the platform appeared by interpenetration of ballast and subgrade, creating an intermediate layer. For their part, the HSL are built according to standards defining the mechanical characteristics of the products used and the thickness of the layers. In this paper, first the difference between classical lines and HSL design are describe. Then the main developments, for new lines, in term of design (diminution of thickness of the layers) and products (utilization of treated materials) and for the track bed investigations on the old lines, are presented. Finally the paper focuses on the impact of those developments on track maintenance.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 104 PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 47 Trackbed Evolution on the French Railway Network N. Calon¹, A. Robinet¹ and V.N. Trinh² ¹Engineering Department, SNCF, Paris, France ²Systra, Paris, France doi:10.4203/ccp.104.47 purchase the full-text of this paper Full Bibliographic Reference for this paper N. Calon, A. Robinet, V.N. Trinh, "Trackbed Evolution on the French Railway Network", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 47, 2014. doi:10.4203/ccp.104.47 Keywords: tracked, railways, interlayer, performance. Summary The aim of this paper is to show the evolution of the trackbed design of railway platforms from the 19th century to the present. In France, there are more than 30,000 kilometers of operational classic lines in use and 2,000 kilometers of high speed lines (HSL). Initially, the classic lines were built without standards and the platform appeared by interpenetration of ballast and subgrade, creating an intermediate layer. For their part, the HSL are built according to standards defining the mechanical characteristics of the products used and the thickness of the layers. In this paper, first the difference between classical lines and HSL design are describe. Then the main developments, for new lines, in term of design (diminution of thickness of the layers) and products (utilization of treated materials) and for the track bed investigations on the old lines, are presented. Finally the paper focuses on the impact of those developments on track maintenance. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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