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BS EN 16432-2:2017:2018 Edition

BS EN 16432-2:2017:2018 Edition

$215.11

Railway applications. Ballastless track systems – System design, subsystems and components

Published By Publication Date Number of Pages
BSI 2018 120
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This part of EN 16432 specifies system and subsystem design and component configuration for ballastless track system.

The system and subsystem design requirements are assigned from the general requirements of EN 16432-1. Where applicable, existing subsystem or component requirements from other standards are to be referenced.

PDF Catalog

PDF Pages PDF Title
2 National foreword
12 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 Symbols and abbreviations
19 5 General
5.1 Ballastless track system, subsystems and components
20 5.2 Subsystems configuration
5.2.1 Ballastless track system with continuous support and embedded rails
21 5.2.2 Ballastless track system with discrete rail seats
5.2.2.1 Ballastless track system with discrete rail seats on prefabricated element supported by a pavement
5.2.2.2 Ballastless track system with discrete rail seats on prefabricated element, independent from the surrounding concrete filling layer or pavement
5.2.2.3 Ballastless track system with discrete rail seats on prefabricated element, monolithically integrated in a pavement
22 5.2.2.4 Ballastless track system with discrete rail seats on a concrete pavement
6 System design
6.1 Establishing the system criteria
23 6.2 System assurance plan
6.3 System integration
6.4 Vertical track stiffness
6.5 Track stability
24 6.6 Load distribution and load transfer by subsystems and components
6.6.1 Principles
25 6.6.2 Calculation steps
6.6.2.1 Determination of bending moment (bending tensile stress) due to rail seat loads
6.6.2.2 Determination of bending moment activated by temperature gradient Δt [K/mm] of rail supporting subsystems like slabs, pavements, frames or beams caused by surface heating
6.6.2.3 Determination of tensile force activated by cooling ΔT [K] of rail supporting subsystems like slabs, pavements, frames or beams
6.6.2.4 Superposition of bending moments from traffic and thermal impact
26 6.6.3 Determination of forces (rail seat loads) between subsystems fastening system and supporting structure (prefabricated element or pavement)
6.6.3.1 Vertical rail seat loads
6.6.3.2 Lateral rail seat loads
6.6.4 Prefabricated element loading and load distribution
6.6.4.1 General
6.6.4.2 Transverse elements (sleepers) loading and transverse load distribution
27 6.6.4.3 Loading and load distribution of longitudinal beams and frames
6.6.4.4 Slabs or frames loading and longitudinal and transverse load distribution
6.6.5 Pavement design
6.6.5.1 Calculation models and limits
6.6.5.2 Continuously reinforced concrete pavement (CRCP)
28 6.6.5.3 Jointed plain concrete pavements (JPCP)
6.6.5.4 Asphalt pavements
6.6.5.5 Base layers
29 6.7 Loading of substructure
30 6.8 Transitions
7 Rails
8 Rail fastening systems
8.1 General
8.2 Rail fastening spacing
8.3 Adjustment
9 Prefabricated elements
9.1 General
31 9.2 General design considerations
9.2.1 Data to be supplied for the general system design
9.2.2 Individual precast element design
9.2.2.1 Load distribution and internal forces
9.2.2.2 Design
9.3 Manufacturing process
9.3.1 General requirements
32 9.3.2 Curing
9.3.3 Surface finish
9.3.4 Marking
9.4 Quality control
9.4.1 General
9.4.2 Quality control during design approval tests
33 9.4.3 Quality control during manufacturing
9.5 Concrete sleepers, bearers and blocks
9.6 Prefabricated slabs and frames
9.6.1 Classification
9.6.1.1 Classification in longitudinal sense
34 9.6.1.2 Classification according to the support conditions on the supporting layer
9.6.1.3 Classification according to the kind of reinforcement
9.6.1.4 Classification according to the function and load distribution characteristic
9.6.2 Design
9.6.2.1 General
9.6.2.2 Design of active and passive reinforcement, limit states, fatigue checking
35 9.6.2.3 Durability, cover, environmental conditions, material characteristics, crack control
9.6.3 Materials
36 9.6.4 Geometrical tolerances
9.6.5 Storage, handling, transport and on-site installation
9.6.5.1 General
9.6.5.2 Storage, handling and transport
37 9.6.5.3 On-site installation
9.7 Filling layer
10 Pavements (layered structure)
10.1 General
38 10.2 Concrete pavements
10.2.1 Application
10.2.2 Materials
10.2.3 Functional requirements
10.2.3.1 General
39 10.2.3.2 Continuously reinforced concrete pavement
10.2.3.3 Plain concrete pavements
10.2.3.4 Concrete pavements without prefabricated elements
40 10.2.3.5 Concrete pavements supporting prefabricated elements (sleepers)
10.2.3.6 Concrete pavement with integrated prefabricated element independent from the pavement structures
10.2.3.7 Concrete pavement with monolithically integrated prefabricated element
41 10.3 Asphalt pavements
10.3.1 Application
10.3.2 Design
10.3.3 Geometrical requirements
42 10.3.4 Asphalt materials and mix design
10.3.5 Materials for surface layer
10.3.6 Requirements for layers
10.4 Unbound, hydraulically bound and bituminous bound base-layers
10.4.1 Application
43 10.4.2 Hydraulically bound base layer
10.4.3 Cement treated base layer (CTB)
10.4.4 Concrete base layer
44 10.4.5 Bituminous base layer
10.4.6 Unbound base layer
45 11 Intermediate layers
11.1 Functions of intermediate layers
11.2 Effects of intermediate layers on ballastless track system
47 Annex A (informative)Vertical vehicle load
A.1 Distribution of vertical railway traffic load and calculation of rail seat loads
A.1.1 General
A.1.2 Rail seat load P0 [N]
A.1.2.1 General
48 A.1.2.2 Rail deflection y0 [mm] for a single wheel load Q0 [N] acting above rail seat
49 A.1.2.3 Additional rail deflection due to influence ηi of an additional wheel load i at positions xi [mm]
A.1.2.4 Rail seat load P0 [N] due to wheel loads Qi [N]
A.1.3 Rail seat loads Pj [N] due to wheel loads Qi [N]
50 A.2 Rail bending moment and bending stress at the rail foot
A.2.1 Rail bending moment M0 [Nmm]
A.2.2 Bending stress at the rail foot σ0 [N/mm2]
51 Annex B (informative)Thickness design calculations for slabs, pavements, frames, beams
B.1 General
B.1.1 Introduction
52 B.1.2 Effective pavement thickness h1 [mm]
53 B.1.3 Bedding modulus k [N/mm3]
B.1.3.1 General
B.1.3.2 Bedding modulus k [N/mm3] for beam or slab/pavement on substructure
54 B.1.3.3 Bedding modulus k [N/mm3] for beam or slab/pavement on unbound base layer and substructure
55 B.1.3.4 Bedding modulus k [N/mm3] for beam or slab/pavement with bounded base layer on substructure
56 B.1.4 Bearing capacity of beam or slab/pavement supported by cementitious or bituminous base layer
B.1.4.1 General
B.1.4.2 Variant II (unbonded multiple layers)
57 B.1.4.3 Variant III (fully bonded multiple layers)
58 B.1.5 Slab on Winkler foundation (Westergaard): Longitudinal and lateral bending moments as well as tensile stresses activated by rail seat loads
B.1.5.1 General
B.1.5.2 Longitudinal bending moment Mlong I,II,III [Nmm] and lateral bending moment Mlat I,II,III [Nmm] due to rail seat loads
61 B.1.5.3 Longitudinal bending tensile stress σlong [N/mm2] and lateral bending tensile stress σlat [N/mm2] due to rail seat loads
64 B.1.6 Beam on Winkler foundation (Zimmermann): Longitudinal bending moment and tensile stress due to rail seat loads
B.1.6.1 General
B.1.6.2 Longitudinal bending moment Mlong I,II,III [Nmm] due to rail seat loads
65 B.1.6.3 Longitudinal bending tensile stress σlong [N/mm2] due to traffic load
68 B.1.7 Critical longitudinal bending tensile stress
B.1.8 Critical lateral bending tensile stress
B.2 Stresses in concrete slab/pavement due to thermal impact
B.2.1 General
69 B.2.2 Constant stresses σc due to temperature changes ΔT acting in concrete slabs or pavements
B.2.2.1 Jointed Plain Concrete Pavements (JPCP)
B.2.2.2 Continuously Reinforced Concrete Pavements (CRCP) or Jointed Reinforced Concrete Pavements (JRCP)
71 B.2.3 Linear stresses σw due to temperature changes Δt acting in concrete slabs or pavements
72 B.3 Determination of maximum allowable flexural fatigue stress due to railway traffic load σQ
B.3.1 Maximum allowable tensile flexural stress in winter (longitudinal stresses)
B.3.2 Maximum allowable tensile flexural stress in summer (lateral and longitudinal stresses)
73 Annex C (informative)Vertical loading
74 Annex D (informative)Examples of calculations
D.1 First example (variant II: unbonded multiple layers) and second example (variant III: bonded layers)
D.2 Distribution of vertical railway traffic loading and calculation of rail seat loads
D.2.1 Rail seat load P0 [N]
76 D.2.2 Rail seat loads Pj [N] due to wheel loads Qi [N]
83 D.2.3 Rail bending moment and bending stress at the rail foot
84 D.3 First example (variant II: unbonded multiple layers)
D.3.1 General
86 D.3.2 Bending moment due to rail seat loads
D.3.2.1 Effective pavement thickness h1
D.3.2.2 Bedding modulus k [N/mm3]
87 D.3.2.3 Equivalent thickness of beam or slab/pavement supported by cementitious or bituminous base layer
D.3.2.4 Slab on Winkler foundation (Westergaard): Longitudinal and lateral bending moment and tensile stress due to rail seat loads
94 D.3.2.5 Critical longitudinal bending tensile stress
95 D.3.3 Stresses due to thermal impact
D.3.3.1 Decisive bending constant stresses σc due to temperature changes ΔT acting in concrete slabs or pavements
96 D.3.3.2 Decisive bending tensile stresses σw due to temperature changes Δt acting in concrete slabs or pavements
D.3.4 Determination of maximum allowable flexural fatigue stress due to vehicle load σQ
D.3.4.1 Maximum allowable tensile flexural stress in winter (longitudinal stresses)
97 D.3.4.2 Maximum allowable tensile flexural stress in summer (lateral stresses)
D.4 Second example (variant III: bonded multiple layers)
D.4.1 General
99 D.4.2 Bending moment due to rail seat loads
D.4.2.1 Effective pavement thickness h1
D.4.2.2 Bedding modulus k [N/mm3]
D.4.2.3 Slab on Winkler foundation (Westergaard): Longitudinal and lateral bending moment and tensile stress due to rail seat loads
105 D.4.2.4 Beam on Winkler foundation (Zimmermann): Longitudinal bending moment and tensile stress due to rail seat loads
107 D.4.2.5 Critical longitudinal bending tensile stress
108 D.4.2.6 Critical lateral bending tensile stress
111 D.4.3 Stresses due to thermal impact
D.4.3.1 Decisive bending constant stresses σc due to temperature changes ΔT acting in concrete slabs or pavements
D.4.3.2 Decisive bending tensile stresses σw due to temperature changes Δt acting in concrete slabs or pavements
112 D.4.4 Determination of maximum allowable flexural fatigue stress due to vehicle load σQ
D.4.4.1 Maximum allowable tensile flexural stress in winter (longitudinal stresses)
D.4.4.2 Maximum allowable tensile flexural stress in summer (lateral stresses)
113 Annex E (informative)Quality control – Routine tests and frequency of testing
E.1 General
E.2 Data of the slabs to be checked
115 E.3 Examples for frequency of testing
116 Annex F (informative)Example of ballastless track system design calculation and analysis based on analytical tools
117 Annex ZA(informative)Relationship between this European Standard and the Essential Requirements of EU Directive 2008/57/EC

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BS EN 16432-2:2017
$215.11