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 geometrischen Entwurf

Diese Europäische Norm umfasst folgende Bereiche:
-   geometrische Konstruktionsgrundsätze für die Radführung;
-   Festlegung des wesentlichen Lieferumfangs;
-   auftretende Kräfte und ihr entsprechendes Abfangen;
-   Toleranzmaßstäbe.
Diese werden anhand einer Weiche dargestellt. Die Grundsätze, die für Weichen angewandt werden, sind gleichermaßen auf umfangreichere Weichenanlagen anwendbar.

Applications ferroviaires - Voie - Appareils de voie - Partie 2: Exigences de 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 à 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

Ta del tega evropskega standarda zajema naslednje tematike:
- geometrijska načela pri projektiranju za vodenje koles;
- opredelitev osnovnih mej napajanja;
- uporabljene sile in njihova ustrezna podpora;
- ravni odstopanja.
Te tematike so prikazane z uporabo na izogibalnem tiru. Glavni sestavni deli kretnice in križišča so predstavljeni na izogibalnih tirih; načela, uporabljena na izogibalnih tirih, prav tako veljajo pri kompleksnejših kretniških sklopih.

General Information

Status
Published
Publication Date
18-Oct-2011
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
19-Oct-2011
Completion Date
19-Oct-2011

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bahnanwendungen - Oberbau - Weichen und Kreuzungen - Teil 2: Anforderungen an den geometrischen EntwurfApplications ferroviaires - Voie - Appareils de voie - Partie 2: Exigences de 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 13232-2:2003+A1:2011SIST EN 13232-2:2004+A1:2012en,fr,de01-januar-2012SIST EN 13232-2:2004+A1:2012SLOVENSKI

STANDARD
SIST EN 13232-2:2004+A1:2012
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13232-2:2003+A1
October 2011 ICS 93.100 Supersedes EN 13232-2:2003English Version

Railway applications - Track - Switches and crossings - Part 2: Requirements for geometric design

Applications ferroviaires - Voie - Appareils de voie - Partie 2: Exigences de la conception géométrique

Bahnanwendungen - Oberbau - Weichen und Kreuzungen -Teil 2: Anforderungen an den geometrischen Entwurf This European Standard was approved by CEN on 7 February 2003 and includes Amendment 1 approved by CEN on 13 September 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,

B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13232-2:2003+A1:2011: ESIST EN 13232-2:2004+A1:2012

EN 13232-2:2003+A1:2011 (E) 2 Contents page Foreword ...................................................................................................................................................................... 31Scope .............................................................................................................................................................. 52Normative references .................................................................................................................................... 53Principles of geometry and running dynamics .......................................................................................... 53.1Introduction .................................................................................................................................................... 53.2General requirements .................................................................................................................................... 63.3Speed relationships ....................................................................................................................................... 93.4Effects of changes in curvature ................................................................................................................. 103.5Switches and crossings on curves ............................................................................................................ 154Non-geometric aspects of design .............................................................................................................. 165Tolerances .................................................................................................................................................... 165.1Accumulation of tolerances ........................................................................................................................ 165.2Acceptance basis......................................................................................................................................... 17Annex ZA (informative)

!Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC" ........................................................................................... 18Bibliography .............................................................................................................................................................. 21

SIST EN 13232-2:2004+A1:2012

EN 13232-2:2003+A1:2011 (E) 3 Foreword This document (EN 13232-2:2003+A1:2011) has been prepared by Technical Committee CEN/TC 256 "Railway applications", 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 or by endorsement, at the latest by April 2012, and conflicting national standards shall be withdrawn at the latest by April 2012. !This document has been prepared under a mandate given to CEN/CENELEC/ETSI by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 2008/57/EC. For relationship with EU Directive 2008/57/EC, see informative Annex ZA, which is an integral part of this document." This document includes Amendment 1, approved by CEN on 2011-09-13. This document supersedes EN 13232-2:2003. The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ". Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This series of European Standards “Railway Applications – Track – Switches and Crossings” covers the design and quality of switches and crossings in flat bottomed rail. The list of parts is as follows:  Part 1 : Definitions  Part 2 : Requirements for geometric design  Part 3 : Requirements for wheel/rail interaction  Part 4 : Actuation, locking and detection  Part 5 : Switches  Part 6 : Fixed common and obtuse crossings  Part 7 : Crossings with movable parts  Part 8 : Expansion devices  Part 9 : Layouts Part 1 contains terminology used throughout all parts of this series. Parts 2 to 4 contain basic design guides and are applicable to all switch and crossing assemblies. Parts 5 to 8 deal with particular types of equipment, including their 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 technical basis for a transaction: Customer The Operator or User of the equipment, or the Purchaser of the equipment on the User's behalf. SIST EN 13232-2:2004+A1:2012

EN 13232-2:2003+A1:2011 (E) 4 Supplier The body responsible for the use of the European Standard in response to the Customer's requirements. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. SIST EN 13232-2:2004+A1:2012

EN 13232-2:2003+A1:2011 (E) 5 1 Scope 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. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication 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/rail interaction. 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 dynamics 3.1 Introduction Geometry is represented in the running plane by the running edges. For the purpose of determination of permissible 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 and crossings 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 and crossings are characterised by changes in lateral acceleration, so rules for both steady and sudden changes between radii are included in this section. Calculations and rules relate to vehicles with 2 axles or vehicles with 2-axle bogies. Vehicles with other than 2 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 shall be stated by the Customer. SIST EN 13232-2:2004+A1:2012

EN 13232-2:2003+A1:2011 (E) 6 3.2 General requirements 3.2.1 References, terms and definitions For the purposes of this part of the European Standard, the terms and definitions given in EN 13232-1:2003 and the following apply. Key reference points relating to turnout geometry and the limits of supply of a turnout are illustrated in Figure 1.

Key 1 Actual switch toe 6 Limits of supply (front joints) 2 Mathematical point of switch 7 Origin of switch curve 3 Tumout intersection 8 Centreline radius 4 Theoretical intersection 9 Turnout angle 5 Limits of supply (heel joints) Figure 1 — Key reference points 3.2.2 General tangency rules At any change in radius the two radii shall be mutually tangential at the running edges. To achieve this the centres of 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+A1:2012

EN 13232-2:2003+A1:2011 (E) 7

Key 1 Tangent Figure 2 — Mutual tangency 3.2.3 Key determinants For a concise definition of the geometry of an assembly of switches and crossings, a minimum amount of basic quantitative information is required. The following items are both necessary and sufficient for such a definition of a turnout. The following shall be defined by the Customer and numerical values provided to the Supplier. Note that some values 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 the Supplier: • 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+A1:2012

EN 13232-2:2003+A1:2011 (E) 8 • origin of switch curve; • real switch toe (RP); • theoretical intersection (of crossing).

Key 1 Overall length 2 Tangent length 3 Turnout intersection 4 Turnout angle Figure 3 — Setting out diagram Radii of main and branch lines and the positions at which they change shall be agreed, for example as illustrated in Figure 4a) for circular geometry and 4b for transitional geometry, together with: • centreline radii; • origin of switch curve to positions of changes of radii; • tangent offset (if any); where such changes of radii shall be bounded either by included angle, or by longitudinal distance or by lateral offset, or in the case of a transition section, by such data as is necessary to uniquely define its shape. SIST EN 13232-2:2004+A1:2012

EN 13232-2:2003+A1:2011 (E) 9

Figure 4a) —Circular Figure 4b) — TransitionalKey 1 Centreline 2 Transition Figure 4 — Key dimensions related to radius 3.3 Speed relationships Fundamental rules of circular motion determine the relationship between radius and speed around a curve. For railway specific applications the following formula applies: vmax = √(amax Rc) (1) where Rc

is the local centreline radius of
...

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