SIST EN 13232-2:2004
(Main)Railway applications - Track - Switches and crossings - Part 2: Requirements for geometric design
Railway applications - Track - Switches and crossings - Part 2: Requirements for geometric design
This part of this European Standard covers the following subjects:
- geometric design principles for wheel guidance;
- definition of basic limits of supply;
- applied forces and their adequate support;
- tolerance levels.
These are illustrated herein by application to a turnout. The main switch and crossing components are represented in turnouts and the principles used in turnouts apply equally to more complex layouts.
Bahnanwendungen - Oberbau - Weichen und Kreuzungen - Teil 2: Anforderungen an den technischen Entwurf
Diese Europäische Norm umfasst folgende Bereiche:
3 geometrische Konstruktionsgrundsätze für die Radführung;
3 Festlegung des wesentlichen Lieferumfangs;
3 auftretende Kräfte und ihr entsprechendes Abfangen;
3 Toleranzmaßstäbe.
Diese werden anhand einer Weiche dargestellt. Die Grundsätze, die für Weichen angewandt werden, sind gleichermaßen auf umfangreichere Weichenanlagen anwendbar.
Applications ferroviaires - Voie - Appareil de voie - Partie 2: Exigences pour la conception géométrique
Cette partie de l'EN 13232 couvre les sujets suivants :
- principes de conception géométrique pour le guidage des roues ;
- définition des limites essentielles pour la fourniture ;
- forces appliquées et leur support adéquat ;
- niveaux des tolérances.
Ces sujets sont illustrés par des applications a un branchement. Les principaux composants des appareils de voie sont représentés dans des branchements. Les principes appliqués dans les branchements sont également applicables dans les assemblages plus complexes.
Železniške naprave - Zgornji ustroj – Kretnice in križišča - 2.del: Geometrijske zahteve pri projektiranju
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bahnanwendungen - Oberbau - Weichen und Kreuzungen - Teil 2: Anforderungen an den technischen EntwurfApplications ferroviaires - Voie - Appareil de voie - Partie 2: Exigences pour la conception géométriqueRailway applications - Track - Switches and crossings - Part 2: Requirements for geometric design93.100Gradnja železnicConstruction of railways45.080Rails and railway componentsICS:Ta slovenski standard je istoveten z:EN 13232-2:2003SIST EN 13232-2:2004en01-junij-2004SIST EN 13232-2:2004SLOVENSKI
STANDARD
SIST EN 13232-2:2004
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13232-2August 2003ICS 45.080English versionRailway applications - Track - Switches and crossings - Part 2:Requirements for geometric designApplications ferroviaires - Voie - Appareil de voie - Partie 2:Exigences pour la conception géométriqueBahnanwendungen - Oberbau - Weichen und Kreuzungen -Teil 2: Anforderungen an den technischen EntwurfThis European Standard was approved by CEN on 7 February 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13232-2:2003 ESIST EN 13232-2:2004
EN 13232-2:2003 (E)2ContentspageForeword.31Scope.42Normative references.43Principles of geometry and running dynamics.44Non-geometric aspects of design.155Tolerances.15Bibliography.17SIST EN 13232-2:2004
EN 13232-2:2003 (E)3ForewordThis document (EN 13232-2:2003) has been prepared by Technical Committee CEN/TC 256 "Railway applications- Track", the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by February 2004, and conflicting national standards shall be withdrawn at the latestby February 2004.This series of European Standards “Railway Applications – Track – Switches and Crossings” covers the design andquality of switches and crossings in flat bottomed rail. The list of parts is as follows:¾ Part 1 : Definitions¾ Part 2 : Requirements for geometric design¾ Part 3 : Requirements for wheel/rail interaction¾ Part 4 : Actuation, locking and detection¾ Part 5 : Switches¾ Part 6 : Fixed common and obtuse crossings¾ Part 7 : Crossings with movable parts¾ Part 8 : Expansion devices¾ Part 9 : LayoutsPart 1 contains terminology used throughout all parts of this series. Parts 2 to 4 contain basic design guides andare applicable to all switch and crossing assemblies. Parts 5 to 8 deal with particular types of equipment, includingtheir tolerances. Part 9 defines the functional and geometric dimensions and tolerances for layout assemblies.These use Parts 1 to 4 as a basis.The following terms are used within to define the parties involved in using the European Standard as the technicalbasis for a transaction:CustomerThe Operator or User of the equipment, or the Purchaser of the equipment on the User'sbehalf.SupplierThe body responsible for the use of the European Standard in response to theCustomer's requirements.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 13232-2:2004
EN 13232-2:2003 (E)41 ScopeThis part of this European Standard covers the following subjects:¾ geometric design principles for wheel guidance;¾ definition of basic limits of supply;¾ applied forces and their adequate support;¾ tolerance levels.These are illustrated herein by application to a turnout. The main switch and crossing components are representedin turnouts and the principles used in turnouts apply equally to more complex layouts.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 13232-1:2003, Railway applications – Track – Switches and crossings – Part 1: Definitions.prEN 13232-3, Railway applications – Track – Switches and crossings – Part 3: Requirements for wheel/railinteraction.prEN 13232-5, Railway applications – Track – Switches and crossings – Part 5: Switches.prEN 13232-9, Railway applications – Track – Switches and crossings - Part 9: Layouts.3 Principles of geometry and running dynamics3.1 IntroductionGeometry is represented in the running plane by the running edges. For the purpose of determination ofpermissible speeds and for definition of the turnout, curvature is defined by the radius of the track centreline.The guiding principles of curves are given in this standard as they apply to switches and crossings. Switches andcrossings are normally designed without differential cant; particular requirements shall be specified.In order to maintain safe and continuous support and guidance of wheels, certain rules of tangency are imposed.Speed and radius are then related to lateral acceleration. Cant deficiency is derived from this. Switches andcrossings are characterised by changes in lateral acceleration, so rules for both steady and sudden changesbetween radii are included in this section.Calculations and rules relate to vehicles with 2 axles or vehicles with 2-axle bogies. Vehicles with other than2 axles may require special consideration and as such their configuration shall be provided by the Customer.These rules are defined for steady-state design, i.e. without acceleration. Requirements of a dynamic nature shallbe stated by the Customer.SIST EN 13232-2:2004
EN 13232-2:2003 (E)53.2 General requirements3.2.1 References, terms and definitionsFor the purposes of this part of the European Standard, the terms and definitions given in EN 13232-1:2003 andthe following apply.Key reference points relating to turnout geometry and the limits of supply of a turnout are illustrated in Figure 1.Key1Actual switch toe6Limits of supply (front joints)2Mathematical point of switch7Origin of switch curve3Tumout intersection8Centreline radius4Theoretical intersection9Turnout angle5Limits of supply (heel joints)Figure 1 — Key reference points3.2.2 General tangency rulesAt any change in radius the two radii shall be mutually tangential at the running edges. To achieve this the centresof adjacent curves shall lie on the same radial line (see Figure 2).Exceptions to the mutual tangency rule may occur. These are:· along the low-side curve of a turnout where gauge variation occurs;· at the switch toe, for example, to shorten the switch rail.Details are given in prEN 13232-3 and prEN 13232-5.SIST EN 13232-2:2004
EN 13232-2:2003 (E)6Key1TangentFigure 2 — Mutual tangency3.2.3 Key determinantsFor a concise definition of the geometry of an assembly of switches and crossings, a minimum amount of basicquantitative information is required. The following items are both necessary and sufficient for such a definition of aturnout.The following shall be defined by the Customer and numerical values provided to the Supplier. Note that somevalues may be different from those for plain line :· gauge;· speed;· maximum lateral acceleration or cant deficiency;· maximum rate of change of lateral acceleration or cant deficiency;· turnout intersection point and angle (see Figure 3);· limits of supply (front joints, heel joints);· lowside gauge variation (if any).For a crossover or junction, in addition, the following shall be defined by the Customer and provided to theSupplier:· distance between main line track centrelines.For switches and crossings on a curved main line, the following must be defined and provided by the Customer:· main line curvature;· main line and branch line cant through turnout.The key points whose location shall be agreed between Customer and Supplier are as follows:SIST EN 13232-2:2004
EN 13232-2:2003 (E)7· origin of switch curve;· real switch toe (RP);· theoretical intersection (of crossing).Key1Overall length2Tangent length3Turnout intersection4Turnout angleFigure 3
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