1、BRITISH STANDARDBS EN 13232-2:2003Railway applications Track Switches and crossings Part 2: Requirements for geometric designICS 45.080g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38
2、g50g51g60g53g44g42g43g55g3g47g36g58+A1:2011National forewordThis British Standard is the UK implementation of EN 13232-2:2003+A1:2011. It supersedes BS EN 13232-2:2003, which is withdrawn.The start and finish of text introduced or altered by amendment is in-dicated in the text by tags. Tags indicati
3、ng changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee RAE/2, Railway Applications - Track.A list of organizations represented on this committee can be
4、 obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 13232-2:2003+A1:2011This British Sta
5、ndard, was published under the authority of the Standards Policy and Strategy Committee on29 August 2003 BSI 2011ISBN 978 0 580 71892 2Amendments/corrigenda issued since publicationDate Comments30 November 2011 Implementation of CEN amendment A1:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
6、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 gomtrique Bahnanwendungen
7、 - 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 stipulat
8、e 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 Stan
9、dard 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 nat
10、ional 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, Switze
11、rland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR 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. E
12、N 13232-2:2003+A1:2011: EEN 13232-2:2003+A1:2011 (E) 2 Contents page Foreword 31 Scope 52 Normative references 53 Principles of geometry and running dynamics 53.1 Introduction 53.2 General requirements 63.3 Speed relationships . 93.4 Effects of changes in curvature . 103.5 Switches and crossings on
13、curves 154 Non-geometric aspects of design 165 Tolerances 165.1 Accumulation of tolerances 165.2 Acceptance basis. 17Annex ZA (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC“ . 18Bibliography 21BS EN 13232-2:2003+A1:2011EN 13232-2:
14、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
15、 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 re
16、quirements 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 intro
17、duced 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 Eur
18、opean 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
19、: 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 app
20、licable 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 defi
21、ne 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 Users behalf. BS EN 13232-2:2003+A1:2011EN 13232-2:2003+A1:2011 (E) 4 Supplier The body responsible for the use of
22、 the European Standard in response to the Customers 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, Es
23、tonia, 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. BS EN 13232-2:2003+A1:2011EN 13232-2:2003+A1:2011 (E) 5 1 Scope This par
24、t 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 compone
25、nts 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 t
26、he 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
27、 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 Pa
28、rt 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 definiti
29、on 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 o
30、rder 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
31、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 rul
32、es are defined for steady-state design, i.e. without acceleration. Requirements of a dynamic nature shall be stated by the Customer. BS EN 13232-2:2003+A1:2011EN 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
33、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
34、 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 t
35、he 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
36、-3 and prEN 13232-5. BS EN 13232-2:2003+A1:2011EN 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
37、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;
38、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 provide
39、d 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 Cu
40、stomer and Supplier are as follows: BS EN 13232-2:2003+A1:2011EN 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 an
41、d 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 change
42、s 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. BS EN 13232-2:2003+A1:2011EN 13232-2:2003+A1:2011 (E) 9 Figure 4a) Circular Figure 4b) Transition
43、alKey 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 Rcis t
44、he local centreline radius of the curve in metre; amaxis the maximum lateral acceleration in m/s2; vmaxis the maximum local velocity in m/s. Alternatively with Vmaxin km/h: Vmax= 3,6 (amaxRc) (2) Often it is convenient to express maximum speed in terms of more physical measures, using the variables
45、cant deficiency and wheel contact gauge. Firstly, wheel contact gauge is expressed conventionally as: sw= st+ sr(3) where swis the wheel contact gauge, or distance between the two upper wheel/rail contacts, in millimetre; stis the track gauge in millimetre; BS EN 13232-2:2003+A1:2011EN 13232-2:2003+
46、A1:2011 (E) 10 sris the rail head width in millimetre. If sris not specified then, for standard gauge (1 435 mm), swtakes the value 1 500 mm. The speed relationship is then given by: Vmax= 3,6 (hd g Rc/ sw) (4) where hdis the maximum permitted cant deficiency in millimetre; g is the acceleration due
47、 to gravity, normally taken as 9,81 m/s2. 3.4 Effects of changes in curvature 3.4.1 Introduction Most real situations yield a step change in curvature, since a smooth curvature change only occurs in transition curves. The effects of step changes are mitigated by the vehicles suspension system, but a
48、n approximate rule is necessary to enable the switch and crossing supplier to match the vehicles requirements. In the following the rules for steady transitions are covered first, then the rules for step changes in curvature. See Figure 5 for examples of alternative arrangements of transitions withi
49、n turnouts. BS EN 13232-2:2003+A1:2011EN 13232-2:2003+A1:2011 (E) 11 Key 1 Radius 2 Transition 3 Straight 4 Radius 1 5 Radius 2 Figure 5 Examples of geometry types 3.4.2 Change of lateral acceleration The steady change of curvature is quantified by the rate of change of lateral acceleration. Alternatively it may be termed a rate of change of cant deficiency. This is related to a rate of change of lateral acceleratio
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