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BS EN 17636:2023

BS EN 17636:2023

$198.66

Railway applications. Infrastructure. Track alignment design parameters. Urban rail

Published By Publication Date Number of Pages
BSI 2023 52
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This document specifies rules and limits for track alignment design parameters, including alignments within switches and crossings. Several of these limits are functions of speed. Alternatively, for a given track alignment, it specifies rules and limits that determine permissible speed with regards to track alignment. This document applies to urban or suburban rail networks for passenger services not integrated with the national network. Sections of urban or suburban rail networks integrated in the national rail networks are not covered by this document. They are covered by EN 13803 (or for nominal track gauges smaller than 1 435 mm by national alignment rules). For the purpose of this document, urban or suburban rail networks include: – Networks designed for own right of way and segregated from general road and pedestrian traffic, and – Networks (partly) not segregated from general road and pedestrian traffic, with shared lanes. This document applies to rail systems with steel wheels running on steel vignole or grooved rails. Rail systems with specific construction issues (e.g. rack railways, funicular railways and other types of cable drawn rail systems) are not covered by this document. This document defines the parameters, rules and limits for nominal track gauges of 1 435 mm and 1 000 mm with permissible speeds up to 120 km/h. For other nominal track gauges, this document defines conversion rules which shall be used to define the limits.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 1 Scope
2 Normative references
3 Terms and definitions
11 4 Symbols and abbreviations
12 5 General
5.1 Background
5.2 Line categories
13 5.3 Alignment characteristics
15 6 Limits for 1 435 mm and 1 000 mm nominal track gauge
6.1 Horizontal radius
6.2 Applied cant
16 6.3 Cant deficiency
17 6.4 Cant excess
6.5 Length of cant transition and/or transition curve in the horizontal plane LK
6.5.1 General
18 6.5.2 Length of linear cant transition and/or clothoid
6.6 Cant gradient
19 6.7 Rate of change of cant
6.8 Rate of change of cant deficiency
20 6.9 Length of constant cant between two linear cant transitions Li
6.10 Abrupt change of horizontal curvature
6.11 Abrupt change of cant deficiency
21 6.12 Length between two abrupt changes of horizontal curvature Lc
22 6.13 Length between two abrupt changes of cant deficiency Ls
6.14 Track gradient
23 6.15 Length of constant track gradient Lg
6.16 Vertical radius Rv
25 6.17 Length of vertical curve Lv
6.18 Abrupt change of track gradient
26 Annex A (normative)Rules for converting parameter values for nominal track gauges other than 1 435 mm
A.1 General
A.2 Symbols and abbreviations
28 A.3 Basic assumptions and equivalence rules
A.3.1 General
A.3.2 Basic formulae
29 A.3.3 Basic data
A.4 Detailed conversion rules
A.4.1 General
A.4.2 Cant D1 (6.2)
31 A.4.3 Cant deficiency I1 (6.3)
32 A.4.4 Cant excess E1 (6.4)
33 A.4.5 Length of cant transition LD and transition curve in the horizontal plane LK (6.5)
A.4.6 Cant gradient dD1/dt (6.6)
34 A.4.7 Rate of change of cant (6.7)
35 A.4.8 Rate of change of cant deficiency dI1/dt (6.8)
36 A.4.9 Abrupt change of curvature and abrupt change of cant deficiency I1 (6.10 and 6.11)
A.4.10 Other parameters (6.1, 6.9, 6.12, 6.13, 6.14, 6.15, 6.16, 6.17 and 6.18)
37 Annex B (normative)Three-dimensional track geometry with regards to resulting cant gradient and resulting vertical radius
B.1 General considerations regarding three-dimensional track geometry
B.2 Angular twist TA and resulting cant gradient (dD/ds)r
B.2.1 Calculation of resulting cant gradient (dD/ds)r where cant is applied by lifting one rail and lowering the other rail
38 B.2.2 Calculation of resulting cant gradient (dD/ds)r when cant is applied by lifting one rail D
B.3 Resulting vertical radius (Rv)r
40 Annex C (informative)The relations between cant deficiency, non-compensated lateral acceleration and related parameters
C.1 Introduction
C.2 Applied cant and roll angle
41 C.3 Equilibrium cant
42 C.4 Cant deficiency and non-compensated lateral acceleration
43 C.5 Applications
44 Annex D (normative)Sign rules for calculation of , and
D.1 General regarding the sign rules
D.2 Sign rules for calculation of
D.3 Sign rules for calculation of
45 D.4 Sign rules for calculation of
47 Annex E (normative)Lengths of intermediate elements Lc between small radius curves in opposite directions
E.1 General
E.2 Lengths of intermediate elements Lc for Line Category A1435
48 E.3 Lengths of intermediate elements Lc for Line Category B1435 and C1000

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BS EN 17636:2023
$198.66