Dynamic properties of railway track and its components. Characterisation of track geometry and track geometry quality 30. The staff of the railway engineering group at tu delft has made a great contribution to the composition and revision of the various chapters. It is used to bear the load from the sleepers, to facilitate drainage of water, and also to keep down vegetation that might interfere with the track structure. For a rail track with low inherent quality the maintenance intervals become shorter on account of unhealthy, unsound and poor bearing substructure as well on account of poor drainage, than for a rail track of higher inherent quality. Track design and construction is part of a complex and multidisciplinary engineering science involving. Apr 04, 2018 elements of railway tracks a railway track is a combination of 1. Untreated steel nuts and bolts and highstrength nuts and bolts for fishplates and fastenings 90.
Placing rail reference marks is a method of controlling the amount of rail added or subtracted in cwr territory. Pdf identification of railway track components and defects by. Jennmar can supply fully erected turnouts, rails and accessories for 40 lb. To obtain the optimum design, component dimensions and mechanical. Also the industry provided some important contributions, specifically on the chapters dealing with rail manufacturing, track components, maintenance and renewal, as well as inspection systems. Rails are the first main element in the railway track components. Chapter 5 track components and materials track design. Ufc 486003 railroad track maintenance and safety standards. I cementitious grout pad on concrete surface 431 433 433.
Typical railway track components overview sleepers, fishplates. In particular, the european rail network poses huge opportunities, as rail is an environmentally friendly and efficient transport mode. Track stiffness rail is assumed to be a beam on an elastic foundation modulus of track elasticity, u or k a. The railroad track is known as a stable structure mainly consisted of rail sleepers, rail fishplate, and rail fasteners like rail clip, railroad tie plate, railraod spike and so on. Rail track and associated equipment for use underground in. In the case of a rail separation, pullapart, defect repair, other rail change out and track panel installation, reference marks. An adjustable connecting rod and crank eye permit accurate setting of the points without respiking the stand.
Both the time frame and costs reflected the need to improve the state of knowledge about construction, maintenance, and operations of rail plant. Compliance with the medical fitness requirements for employment as a railway worker. As for the railway sectors, there are the following standards in the iso standards 45 railway engineering. Through leverage principle, the railroad switch rod switches the two movable rails to ensure the trains drive into the appointed route. Read chapter chapter 5 track components and materials. In addition, the increasing tractive power of locomotives leads to significant increase in the longitudinal load demand in railway tracks. The track train dynamics research program conducted by the american railroad industry, its suppliers, and the federal railroad administration was a multiyear, multimillion dollar undertaking. Presentation on railway construction and maintenance. As an important part in rail construction, turnout helps to enable the trafficability of the rail. Pdf dynamic properties of railway track and its components. Railway track components in the modern railway tracks. The capacity of longitudinal restraint of existing rail fastening system.
It discusses briefly on the track structures and track components in order to provide the foundation of understanding ballasted railway tracks. Formation the surface prepared to receive the ballast, sleepers, rails, etc for constructing the railway track is called formation or sub grade. Component parts of railway track the typical components are rails, sleepers or ties, fasteners, ballast or slab track, subgrade gauge the clear minimum horizontal distance between the inner running faces of the two rails forming a track is known as gauge. B60 on track tampers to 904 as on 01122018 track machines covering almost all spheres of track maintenance and track layingrenewal activities. Railway applications track geometry quality part 1. Railway components technical delivery requirements part 4.
A ballasted railway track system comprises seve ral components among which steel rails, rail fasteners, timber, steel or concrete sleepers, granular ballast, subballast, and subgrade materials are the main parts. To give a train a good ride, the track alignment must be set to within a millimeter of the design. Unit of track deflection in, less play or track looseness or. What the guidance covers 4 this guidance covers rail track used underground in mines by locomotive and. B60 on track tamping machine of matisa make during 1963. Ac components in the rectified current of the cp system interfering with the operation of the track relays of railway track circuits of the ac type.
Dynamic responses of the railway track and its components are the key to evaluate the structural capacity of railway track and its components. A good quality and strong aggregate materials, steel i section to use in the construction of railway tracks. Railway track components overview rail sleeper, rail. All these railway track components work together, which keep the railway safety and reliability. Ballast forms the bed upon which railway sleepers or railroad ties are laid. Regio rail unit cost tool understands that the work performed by pwc was performed in accordance with instructions provided by our client, and was performed exclusively for their benefit and use. Pdf analysis and design of railway track system joshua.
Hence, a low quality track deteriorates faster than a high quality track. It ensures the transportation of trains through providing a. Jun 30, 2015 railway track components overview rail sleeper, rail fishplate, rail fasteners and rail spike. Railway track engineering presents conventional methods of track construction, maintenance and monitoring, along with modern sophisticated. Rail fastener the wheels, 3 to restrict the track excessive settlement, 4 to facilitate track maintenance rail fasteners also known as fastening systems operations, especially those related to the are used in railway track structure to fasten the correction of track geometry defects, and 5 to rails on the sleepers and to protect the rail. A ballasted railway track system comprises several components among which steel rails, rail.
A high quality rail track ages slower and has a longer service live than a low quality track. Railway track gradient curve with superelevation 19. Railway track sy stems are constructed to provide a smooth and safe running surface for passenger or freight trai ns. The track is supplied in prefabricated sections, usually 3 m, 6 m or even 9 m long, which are joined together by flanged joints or special male and female joints. You can specify all individual components from switch points, fittings, switch rods, stands.
Rahul component parts of a permanent way following are the components of a permanent way. The track on a railway or railroad, also known as the permanent way, is the structure consisting of the rails, fasteners, railroad ties and ballast, plus the underlying subgrade. Rail components, train components manufacturers, rail road. Railway turnout is a mechanical device that used to guide the trains from one rail track to another. The crack on the railway track is initiated by two connectors. The dynamic train track interaction forces will give rise to vibrations that lead to track deterioration, such as track settlements, railhead corrugation growth, damage to track components railpads.
Smithberger railroad track structure system design thomas p. Quality components and construction the 22e and 22eh feature high quality components and construction, including. Entry requirement nqf level 2 with communication, science and maths literacy. Components sleepers, rail fastenings, rails without a proper appropriatesubgrade, subsoil and formation strengthening and without taking the water out and keep the water away from the track bed by a proper surface water drainage management led only to a. Pdf the ability of newer trains to run faster and carry heavier loads, coupled with the continuously growing traffic volumes in modern rail. Track components and materials iii5 565 noitarugifnoc larutcurts 2. Besides, there are many other railway track parts do the same thing like them, such as rail anchor, rail clamp, etc. Light rail track design handbook list of figures figure 4. It determines the max load that the locomotive can haul that section. Railroad track mechanics and technology sciencedirect. The document may therefore not include all matters relevant to the reader and the regio rail unit cost tool may not include all functions.
These criteria, which include limits on rail stresses, sleeper stresses, the pressure between the sleeper and the ballast and the pressure on. Pdf identification of railway track components and defects. Railway track design 233 233 on a more discrete level, the designer must take the basic components of alignments, tangents, grades, horizontal and vertical curves, spirals and superelevation and construct an alignment, which is cost effective to construct, easy to maintain, efficient and safe to operate. Jan 01, 2014 the final designs of both railway lines are shown in fig. Untreated steel nuts and bolts and highstrength nuts and bolts for fishplates and fastenings. New advances in analysis and design of railway track system. Finally, because railway structures must perform under figure 81 typical railway bridge courtesy of metra 2003 arema. Tracks where electric trains or electric trams run are equipped with an electrification system such as an overhead electrical power line or an additional elec. Pdf identification of railway track components and.
To maintain rail track infrastructure to ensure the optimum availability and reliability thereof. Feb 22, 2017 all these railway track components work together, which keep the railway safety and reliability. In most of mechanical models of railway tracks, the track components have been simulated as a type of elements which are classified according. This is an informational post, please check the components of railway track page if you are searching for the product. Now the fleet of track machines on indian railways has grown from 4 no. Induction in cable or line wires from the harmonics in the rectified current of the cp system interfering with remote. Superelevation between the inside and outside rails 20. Most of the known track components within the test. Turnouts and switches north american rail products inc. Differential movement causes wear of track components. Railway track stiffness vertical track load divided by track deflection is a basic parameter of track design which.
Dynamic responses of the railway track and its components are the key to evaluate the structural capacity of. Trbs transit cooperative research program tcrp report 155. For clarity it is often referred to as railway track or railroad track. The term track or trackwork includes special trackwork and its interface with other components of the rail system.
As a professional rail components manufacturer, agico rail can custom any component parts of railway track with national standards. Railroad track is known a stable structure that mainly consists of rail sleepers, fishplates and fasteners. Reference marks must be utilized prior to cutting cwr for any reason. Rail track and associated equipment for use underground in mines 71 of 84 pages. Assessment of unit costs standard prices of rail projects. Identification of railway track components and defects by analysis of wheel rail interaction noise. General this chapter includes criteria and standards for the planning, design, construction, and maintenance as well as materials of caltrain trackwork. Railway track engineering presents conventional methods of track construction, maintenance and. Design of railway track for speed and highspeed railways. Ballast must support the weight of the track and the considerable cyclic loading of passing trains. Therefore, the european commission is investing in the development of the rail network to increase the share of rail in freight and passenger transport.
Through leverage principle, the railroad switch rod switches the two movable rails to. Requirements for the optimum design are r e lated to the wear of rails and wheels, the level of acoustic noise produced by a moving train and the strength of the applied mate rials. Diagram illustrates the principal elements of a turnout which consists of a frog, a switch, two guard rails, straight and curved closure rails, stock rails and a switch stand. The steepest gradient allowed on the track section. High speed rail at uic credits high speed rail encompasses a complex rea lity involving many technical aspects such as infrastructure, rolling stock and operations, as well as strategic and crosssector issues including human factors and financial, com mercial, and managerial components. Committee on railroad track structure system design chairman. Introduction to railway infrastructure university of kentucky. Types of railway turnouts and their components rail fastener. They do not rely upon any conductive steel or concrete components for structural. Switch stands also known as switch controls switch stands are manually operated mechanical devices used to move a switch between its positions.
Finie element analysis of railway track under vehicle. Fundamentals of railway and technology quotations for. Recent findings indicate one of major causes of damages, which is attributed to the resonant behaviours, in a railway track and its components. The modern railway version is based on the steel wheel running on a steel rail. Pdf design of railway track for speed and highspeed. Basically, when a railway track is excited to generalised dynamic loading, the railway track deforms and then vibrates for certain duration.
145 49 1006 1218 106 297 265 975 633 10 38 401 1426 133 62 1581 114 1356 1335 229 553