Modern Railway Track - Esveld

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Modern Railway TrackSecond Edition

MODERN RAILWAY TRACKSecond EditionCoenraad EsveldProfessor of Railway EngineeringDelft University of Technology2001MRT-Productions

Delft University of TechnologyEditing: Dior Zwarthoed-van NieuwenhuizenLayout: Jan van ’t Zand, TU DelftDrawings: TU DelftProduction: Koninklijke van de Garde BVISBN 90-800324-3-3SISO 696.3 UDC 625.1 Copyright 2001 C. EsveldThis work is subject to copyright. All rights are reserved, whether the whole or part of the material isconcerned, specifically the right of translation, reprinting, re-use of illustrations, recitations, broadcastings, reproduction on microfilm or in other ways, and storage in data banks. Duplication of this publication or parts thereof is only permitted under the Dutch Copyright Law.This book can be ordered from:MRT-Productions . P.O. Box 331 . NL-5300 AH Zaltbommel . The NetherlandsTel.: 31 418 516369 . Fax: 31 418 516372 . Email: mrt@esveld.comInternet: www.esveld.com

Major contributions to this Second Edition were made by the following persons:Norbert Frank, Voest Alpine SchienenStanislav Jovanovic, TU DelftAnton Kok, TU DelftAmy de Man, TU DelftValeri Markine, TU DelftRainer Oswald, VAEPeter Scheepmaker, TU DelftRainer Wenty, Plasser & TheurerGerard van der Werf, TU Delft and ArcadisJan van ‘t Zand, TU DelftArjen Zoeteman, TU DelftJan Zwarthoed, TU Delft and Volker Stevin Rail & Traffic

Modern Railway TrackSecond Edition

To my grandchildrenThomasMaudFiekeandDouwe

Publication of this book has been made possible thanks to the sponsoring of the following companies:Main SponsorsDelft University of Technology,The NetherlandsBAM NBM Rail bv, The NetherlandsGerman Track Systems Projektgesellschaft mbH, GermanySponsorsPlasser & Theurer, AustriaVossloh Rail Fastening Systems, GermanyAdvertisersElektro-Thermit, GermanySpeno International, SwitzerlandFront Cover SponsorVossloh Rail Fastening Systems, GermanySpine SponsorPandrol, England

Modern Railway TrackPREFACEAcknowledgementWith the preparation of this Second Edition many experts have assisted to provide and check existingmaterial and to write additional sections. In the first place I would like to thank my staff of the railwayengineering group of Delft University of Technology: Jan van ‘t Zand, Peter Scheepmaker, Gerard vander Werf, Anton Kok, Valeri Markine, Ivan Shevtsov, Pedja Joksimovic and the secretaries JacquelineBarnhoorn and Sonja van den Bos. I am most indebted to my Ph.D. students: Akke Suiker, Amy deMan, Arjen Zoeteman, Søren Rasmussen, Stanislav Jovanovic and Jan Zwarthoed for their invaluable ideas, suggestions and contributions. Those who have drafted significant parts have been mentioned explicitly in the outset of the book. From TU Delft I would like to mention in particular Jan van ‘tZand who made the entire layout of the book in Framemaker.I would also like to express my gratitude to my colleagues of the management team of the Section forRoad and Railway Engineering at the Civil Engineering Department of TU Delft: André Molenaar,Peter Scheepmaker, Lambert Houben, Martin van der Ven and Abdol Miradi for their support in producing this Second Edition.For the high-speed section I would like to thank the Korean High Speed Rail Corporation for contributing information of the high-speed project between Seoul and Pusan. In this respect I would also liketo refer to the many interesting discussions in the Special International Track Advisory Committee(SITAC), comprised of Dr. Kee-Dong Kang, Dr. Yoshihiko Sato, Mr. Serge Montagné, Prof. KlausRiessberger, Mr. Gerhard Kaess and myself, with the active assistance of Mr. Arne Svensoy, Mr. Bertold Pfeifer and Mr. Ki-Jun Son.Valuable information was received from my Japanese colleagues Dr. Yoshihiko Sato from the RailwayTrack System Institute, Dr. Katsutoshi Ando and Mr. Noritsugu Abe from the Railway TechnicalResearch Institute (RTRI) and Mr. Tetsuhisa Kobayashi from the Japan Railway Construction PublicCorporation (JRCPC) for which I would like to express my gratitude.I very much appreciated the indirect contributions by the companies and members participating in theCoordinating Committee for Railway Engineering of the Information and Technology Centre for Transport and Infrastructure (CROW) in The Netherlands.I also owe much gratitude to Mr. Rainer Wenty from Plasser and Theurer for revising the section ontrack maintenance and renewal, and providing information on various other related subjects.I highly appreciated the input on stone blowing from Mr. Peter McMichael of Railtrack and Mr. DavidHill-Smith of AMEC Rail.The section on rail grinding was checked by Mr. Wolfgang Schöch for which I would like to expressmy thanks.For the section on rails I am very grateful for the contribution of Dr. Norbert Frank from Voest AlpineSchienen, who revised large parts of the original text.I very much appreciated the assistance of Mr. Paul Godart of NMBS/SNCB for providing the information on the work of CEN and UIC concerning new rail standards.I would like to express my gratitude to Mr. Hugo Goossens of TUC Rail for the many interesting discussions on track maintenance.I owe much gratitude to Mr. Rainer Oswald from VAE, for his suggestions on revising the section onswitches and crossings.I would like to thank Dr. Frank Kusters of Elektro-Thermit for checking the section on ET welding.ix

PREFACEModern Railway TrackThanks to Dipl.-Ing. Hans Bachmann, Dipl.-Ing. Jens Kleeberg and Dipl.-Ing. (FH) Martin Kowalski ofPfleiderer I was able to incorporate the latest information of the Rheda system in the chapter on slabtrack.Furthermore essential information on track components were provided by the suppliers, for which Iwould like to thank in particular Mr. Gerrien van der Houwen of Edilon, Mr. Dirk Vorderbrück fromVossloh, Mr. Chris Eckebus from Phoenix Benelux, Mr. David Rhodes from Pandrol, Mr. PatrickCarels of CDM and Mr. Olaf Unbehaun of Cronau.For the parts on inspection systems we received many contributions from the industry. I would like toexpress my thanks in particular to Mr. Anton Weel and Mr. Han Wendt of Eurailscout, Mr. Jaap Roosand Mr. Erwin Giling of TNO-TPD, Mr. Aad van der Linden and Mr. Jan van der Schee from Koninklijke BAM NBM, Mr. Wido de Witte from Erdmann Softwaregesellschaft, Mr. Kevin Kesler of Ensco,Mrs. Danuše Marusicová of Czech Railways (CD), Prof. Willem Ebersohn of Amtrack, Mr. CharlesPenny of Balfour Beatty, Mr. Paolo Redi of S.E.I. Sistemi Energetici Integrati and Mr. Ted Slump of NSRail Infrabeheer.Finally I would like to thank Dior van Nieuwenhuizen for her magnificent work to check and correct theEnglish text.I would like to conclude with expressing the hope that this Second Edition will once again prove to bea useful contribution to the training of students and railway engineers.Coenraad Esveldx

Modern Railway TrackPREFACEPREFACEAfter the success of Modern Railway Track this Second Edition is an extension and complete revisionof the original book, in which the developments of the last ten years have been incorporated. Theresearch projects carried out at the Railway Engineering Group of Delft University of Technology haveplayed a central role. The theory of railway track and vehicle track interaction has been substantiallyenhanced and much more attention has been given to dynamics. Undoubtedly one of the most important extensions was the part on slab track structures. But also track management systems have beengiven much more attention. Numerical optimization and testing, as well as acceptance are new chapters.When revising the lecture notes for the railway course at the Civil Engineering Department of TU Delftin the period 1994 - 2000 the first edition of this book was taken as a starting point. The first editionand the TU Delft lecture notes, together with various publications and research reports, mainly of therailway engineering group of TU Delft, were then forming the base for the second edition.The staff of the railway engineering group at TU Delft has made a great contribution to the composition and revision of the various chapters. Also the industry provided some important contributions,specifically on the chapters dealing with rail manufacturing, track components, maintenance andrenewal, as well as inspection systems.The first seven chapters are dealing with the basic theory of the wheel rail interface and track design.In the design attention is given to both static and dynamic aspects, whereby a number of examples isgiven of results obtained from computer models like RAIL, GEOTRACK and ANSYS. In the part onstability and longitudinal forces the CWERRI program is extensively discussed.The discussion of track structures has been split up into a chapter on ballasted track and one on slabtrack. The first one is dealing with the conventional structures and modern ballasted designs,whereas the slab track chapter focuses on developments of the last decades. Both continuous slabsand prefabricated solutions are addressed in combination with discretely supported and continuouslysupported rails.The chapter on rails has been brought to the state of the art, with introducing the new EN standardsand discussing the latest inspection systems. Also the latest information on bainitic rail steels hasbeen incorporated.For switches and crossings high-speed turnouts are discussed, together with the geometrical designcriteria, and also modern inspection systems for controlling switch maintenance.In railway engineering practice track maintenance and renewal forms a key factor. The latest trackmaintenance methods and the associated machines are presented, being a major extension compared to the first edition of this book. The part on track deterioration has now been incorporated in thischapter.Optimization was one of the issues very much underestimated in railway engineering. Such techniques are not only applicable to components and structures, but also to decision support systemsand resource optimization. A separate chapter has been added called numerical optimization with themain emphasis on structural components.From the outset railway engineering has always had a strong component in experimental work.Therefore a new section has been added on testing and acceptance, in which also the issue ofacceptance criteria for new railway components is addressed.The chapter on noise and vibration is describing the fundamentals and has been taken over from thefirst edition with only a few modifications.xi

PREFACEModern Railway TrackThe chapter on inspection and detection methods has been completely revised. The original chapterwas primarily based on NS experience. Now the state of the art inspection systems have been introduced. However the fundamental parts of the first edition have been left in tact.The chapter on high-speed tracks contains some applications of high-speed projects and some dedicated issues such as pressure waves in tunnels. Also a section is devoted to magnetic levitation.In track maintenance management systems various issues on track maintenance and renewal decision support are described, as well as monitoring of phenomena relevant to the various maintenanceprocesses. Special attention is given to the ECOTRACK system, developed under the auspices ofUIC and maintained and supported by TU Delft.Railway assets involve a large capital and need to be managed carefully. The chapter on this issuedeals with the general principles of asset management and the way in which such systems can be setup.The final chapter is dealing with life cycle cost analysis. After describing the general principles anumber of case studies are discussed.Zaltbommel, Summer 2001Coenraad Esveldxii

Modern Railway TrackTABLE OF CONTENTSTABLE OF CONTENTS1 INTRODUCTION1.1 Historic development. 11.2 Railways . 11.3 Tramways and metro. 31.4 Operational aspects . 41.4.1 Functions of a railway company. 41.4.2 Infrastructure. 41.4.3 Rolling stock. 51.4.4 Personnel. 51.4.5 Electrification. 61.4.6 Catenary systems . 71.4.7 Road crossings . 81.4.8 Major rail infrastructure projects. 91.4.9 Developing countries . 91.5 Geometry of a railway line . 101.5.1 Clearances. 101.5.2 Alignment . 131.6 General track considerations. 131.6.1 Track requirements. 131.6.2 Load-bearing function of the track . 141.6.3 Indication of rail forces and displacements. 151.6.4 Track geometry components . 152 WHEEL-RAIL INTERFACE2.1 Wheel-rail guidance. 172.2 Wheelset and track dimensions . 172.3 Conicity. 182.4 Lateral movement of a wheelset on straight track . 192.4.1 Theory according to Klingel . 192.4.2 Hunting movement. 202.5 Equivalent conicity. 212.6 Worn wheel profiles . 222.7 Wheel-rail contact stresses . 232.7.1 Hertz theory . 232.7.2 Hertz spring constant. 242.7.3 Single and two-point contact between wheel and rail . 252.7.4 Spreading forces . 262.7.5 Wheel-rail creep. 272.7.6 Spin. 282.7.7 Creepage coefficients . 292.8 Train resistances . 302.8.1 Types of resistances . 302.8.2 Required pulling force. 312.8.3 Adhesion force. 323 CURVES AND GRADIENTS3.1 General considerations . 35xiii

TABLE OF CONTENTSModern Railway Track3.2 Curvature and superelevation in horizontal curves . 353.2.1 Curve radius/curvature. 353.2.2 Curve effects. 353.3 Superelevation. 363.3.1 General considerations . 363.3.2 Cant deficiency . 373.3.3 Effect of suspension on lateral acceleration . 383.3.4 Effect of body tilt coaches on cant deficiency . 383.3.5 Switches and other constraints . 393.3.6 Cant excess . 393.3.7 Maximum cant. 393.4 Transition curves . 393.4.1 General remarks . 393.4.2 Clothoid . 403.4.3 Cubic parabola . 413.4.4 Curve displacement . 413.5 Cross level transitions . 423.5.1 Relation with the transition curve. 423.5.2 Length of normal transition curve. 433.5.3 Adjacent curves . 433.6 Curve resistance. 433.7 Gradients . 443.7.1 Gradient resistance . 443.7.2 Magnitude of gradient . 443.7.3 Vertical transition curves . 453.7.4 Guidelines for permissible quasi-static accelerations . 453.8 Alignment in mountainous areas . 463.9 Computer-aided track design . 483.10 PASCOM - software to estimate passenger comfort. 513.10.1 Numerical model. 513.10.2 Case 1: Investigation of dynamic effects . 523.10.3 Case 2: Track HSL-Zuid (NL) . 534 TRACK LOADS4.1 In general. 554.2 Axle loads . 554.3 Line classification . 554.4 Tonnages. 564.5 Speeds . 564.6 Causes and nature of track loads. 574.7 Vertical rail forces. . 574.7.1 Total vertical wheel load . 574.7.2 Tilting risk. . 584.8 Lateral forces on the rail. 594.8.1 Total lateral wheel load . 594.8.2 Derailment risk . 594.8.3 Lateral force on the track . 604.9 Longitudinal forces. . 614.9.1 Causes . 614.9.2 Temperature forces. 614.9.3 Track creep . 61xiv

Modern Railway TrackTABLE OF CONTENTS4.9.4 Braking load . 624.10 Influence of higher speeds and increased axle loads . 624.10.1 Speed . 624.10.2 Increase in axle loads . 634.11 Wheel flats. 674.12 Forces due to bad welds . 684.13 Axle box accelerations . 695 STATIC TRACK DESIGN5.1 Introduction. 715.2 Supporting models . 715.2.1 Winkler support model . 715.2.2 Discrete rail support . 715.2.3 Exercise: Spring constant determination . 725.2.4 Continuous rail support . 735.2.5 Approximation of discrete rail support. 735.3 Beam on elastic foundation model . 745.3.1 Solution of the differential equation. 745.3.2 Several wheel loads. 765.3.3 Two-axle bogie . 775.3.4 Negative deflection . 775.3.5 Beam with hinge (jointed track). 785.3.6 Alternative expressions for characteristic length L . 795.3.7 Fast determination of vertical elasticity constants. 795.3.8 Order of magnitude of elasticity constants. 795.4 Double beam model . 805.5 Pasternak foundation model. 815.6 Rail stresses . 835.6.1 Stresses in rail foot centre . 835.6.2 Dynamic amplification factor. 835.6.3 Maximum bending stress in rail foot centre . 845.6.4 Stresses in the rail head . 865.6.5 Rail stresses due to a combined Q/Y load. 885.6.6 Rail tables . 905.7 Sleeper stresses. 915.8 Stresses on ballast bed and formation .

Modern Railway Track PREFACE xi PREFACE After the success of Modern Railway Track this Second Edition is an extension and complete revision of the original book, in which the developments of the last ten years have been incorporated. The research projects carried out at the Railway Engineering Group of Delft University of Technology haveFile Size: 2MB

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