Course detail
Railway Constructions I
FAST-CN001Acad. year: 2022/2023
Wheel – rail interface, wheelset and track dimensions, equivalent conicity, lateral movement of wheelset on straight track
Wheel – rail contact stresses, Hertz theory, adhesion and adhesion force, train resistances
Vehicle in curve, Vogel theory, Heumann theory, forces on wheelset, derailment condition
Track loads, vertical, lateral and longitudinal forces, influence of higher operation speed
Static track design, rail stresses, sleeper stresses, vertical stresses on ballast bed and formation, computer models
The rail, manufacturing, welding, testing and acceptance, rail failures, rail grinding
Theory of continuous welded rail. Longitudinal forces, stability of continuous welded rail.
Modern railway track structures.
Dynamic track design. Principles, simple dynamic model of track wheel interaction. Dynamic models of track, critical train velocity, dynamic response on vehicle, wheelset, transfer of vibrations between wheel and rail.
Switches and crossing, types, turnout parts. Geometry of set of switches and common crossings. Manufactured types and notation.
The single turnout, stock rail, switch rail (blade), common and crossings, sleepers, fastenings systems. Operating and locking systems. Crossings and slip points.
Turnout collections. Cross overs, junctions, sets of turnouts. Turnouts in curves.
High speed turnouts, development of new turnouts structures.
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Learning outcomes of the course unit
Prerequisites
Railway substructure, subdivision and construction of rail substructure and its construction layers, construction and shape of earth formation
Railway superstructure and modern railway structure design
Co-requisites
Planned learning activities and teaching methods
Assesment methods and criteria linked to learning outcomes
Course curriculum
2. The single turnout, stock rail, switch rail (blade), common and crossings, bearers, locking device, fastenings systems. Sets of turnouts.
3. Wheel – rail interface, wheelset and track dimensions, equivalent conicity, lateral movement of wheelset on straight track.
4. Wheel – rail contact stresses, Hertz theory, adhesion and adhesion force, train resistances. Vogel theory, Heumann theory, forces on wheelset, derailment condition.
5. Static track design. Vertical stresses on ballast bed and formation and its deformation resistance. Climatic conditions.
6. Static track design, rail stresses, sleeper stresses.
7. Theory of continuous welded rail. Longitudinal forces, stability of continuous welded rail.
8. Dynamic track design.
9. Principles, simple dynamic model of track wheel interaction.
10. Dynamic models of track, critical train velocity, dynamic response on vehicle, wheelset, transfer of vibrations between wheel and rail.
11. The rail, assessment, defects and failures , grinding.
12. Permanent way on bridges. Continuous welded rail on bridges.
13. Railway temporary bridges.
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Aims
Specification of controlled education, way of implementation and compensation for absences
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Prerequisites and corequisites
Basic literature
IŽVOLT, Libor, Janka ŠESTÁKOVÁ a Michal ŠMALO. Železničné staviteľstvo 2: Diagnostika, mechanizácia prác a technologické postupy údržby železničnej jazdnej dráhy. Žilina: EDIS, 2015. ISBN 978-80-554-1169-9. (SK)
LICHTBERGER, Bernhard. Track compendium: track system, substructure, maintenance, economics. 2. Hamburg: DVV Media Group, 2011. ISBN 978-3-7771-0421-8. (EN)
PLÁŠEK, Otto, Pavel ZVĚŘINA, Richard SVOBODA a Milan MOCKOVČIAK. Železniční stavby: Železniční spodek a svršek. Brno: Akademické nakladatelství CERM, 2004. ISBN 80-214-2621-7. (CS)
Recommended reading
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Syllabus