Sleepers. Minimum composite sleeper index for wooden sleepers used in cross-overs, is, 68. They holds the rail strongly and connecting rail to the sleeper is also simple. Image of traffic, industrial, design - 119510750 the transverse sleepers are economical, silent in operation and running of the train over these sleepers is smooth. Our range of sleepers accommodates vertical and inclined vignole rails and 95RBH bullhead rails. Wooden, cast iron, steel or RCC members which are laid transverse to the track alignment to support the rails and to transfer the load from the rails to the under line blast are called sleepers. Intrastate and Light Weight Lines may also have a small proportion of 22t axle load traffic @ 40km/h. 3) Sleepers to bridge girders,etc. Generally laid perpendicular to the rails, ties transfer loads to the track ballast and subgrade, hold the rails upright and keep them spaced to the correct gauge. Report. A rail fastening system is a means of fixing rails to railroad ties or sleepers. The elastic rail clips can be fixed on wooden, steel, cast iron, and concrete sleepers with the help of a base plate and some other ancillary fittings. According to their relations between steel rails, tie plates and wooden sleepers, they can be divided into three types: the separated type and the composite type. Free from decay and are not attacked by vermins; Connection between rail and sleeper is stronger; Connection between rail and sleeper is simple COPYRIGHT © 2021 by grabSTUDY. Reduced maintenance costs as a result of greater lateral stability. To maintain correct gauge of the track, cross pieces are provided at regular intervals. Reduced transport costs, due to lighter weight and stackable design. The steel rail, also know as rail track, railroad rail, is used to guide the train wheels far forwarding, by withstanding the enormous stress by the wheel when a train passes by, and transferring to the tie sleepers as well. It consists of slabs of stones or pieces of woods placed parallel to and underneath the rails. 1. Gauge widening for curves less than 200 m radius is not required for steel sleepers. Steel rail sleepers are often seen as a middle ground between wood and concrete. Hook bolts are used for fixing timber sleepers to bridge girders. We fabricate these sleepers using channels of suitable sections and weld them together to obtain the required strength. categories. Have a useful life of 20-25 years. Workspace. Rails are fixed to sleepers by different types of fixtures and fastenings The from CIVIL ENGI 4411 at Sri Lanka Institute of Information Technology Question: Rails are fixed on steel sleepers. A railroad tie, crosstie, railway tie or railway sleeper is a rectangular support for the rails in railroad tracks. Rag bolts. hold the rails in proper level or transverse tilt. 69. They consist of two pots or plates with rib and connected by wrought iron tie bar of section of about 2″ ½” each pot or plate is placed below each rail. Types Rail to Rail Joining --- Fish plates, bolts, nuts. Table 1 Rails to be used are canted 1 in 20 to centre of track. We manufacture and supply a wide range of shallow depth (165mm deep) and full depth (200mm deep) hollow steel sleepers for the conveyance of cables and services under the track. It is a support for the steel rails. Timber sleeper To prevent creep in rails, the steel sleepers are fixed with rails by clips, bolts and A. one key B. two keys C. three keys D. four keys. The steel sleepers are cut to length, the ends is pressed in a forging die. Image of close, track, train - 119510748 We see them when shivering on the platform edge in morning peak. Most of the tracks lays with the metal sleepers. Steel Sleepers manufactured by AGICO has wide range of application, from metre gauge railways to mainline and heavy haul freight routes, AGICO can produce steel sleepers according to UIC 865 and BS 500-2000, steel material and steel sleeper length can be customized according to customer requirements.. UIC-865 Steel Sleeper … Answer: Option 3. Most of us are familiar with wooden, and in more recent times, concrete railway sleepers (or railroad ties as they are called in the US). They are in the form of steel trough inverted on which rails are fixed directly by keys or nuts and bolts and used along sufficient length of tracks. Rails are fixed on steel sleepers A. by bearing plates B. by dog spikes C. by keys in lugs or jaws D. none of these. They may be a twin block sleepers joined by an angle iron. Fishplatesare used for joining rails. Cast iron sleeper. Photo about Steel rail fixed to a concrete sleeper. The rail shall provide smooth and continuous rolling surface with least resistance. R.C.C and pre-stressed concrete sleepers are now replacing all other types of sleepers except to some special circumstances such as crossing bridges etc here timber sleepers are used. Alternatively, timber sleepers may continue to be used at joints. Our steel sleepers are the most advanced in the world providing lower installation and maintenance costs and more efficient logistics. They link the rails endwise and fix the rails either on chairs fixed to sleepers or directly on to the sleepers. It may be a single block pre-stressed type. On sleepers, the rails are supported and fixed, to transfer the loads. Steel sleepers. Some types of steel sleepers we have currently are: BS500 steel sleeper: BS75A, BS75R, BS80A, BS90A, BS100A, BS113A UIC865 Steel Sleeper: UIC54, UIC60 Bosheng’s steel sleepers are manufactured in accordance with the specific technical requirements of customers. • Rails are fixed to sleepers by different types of fixtures and fastenings (chairs, bearing plates, fish plates, fish bolts, spikes etc.). Sturdier than wood and less expensive than pre-stressed concrete, it seemed logical that steel could prove a boon to companies looking to undertake an economical track upgrade. All Rights Reserved, 64. A joint sleeper of cast iron known as rail Free Duplex sleepers has been use as a rail joints in conjunction with it. It is a support for the steel rails. Hence they are universally used. Steel can be effected by chemicals easily. Flat-bottom rails are fastened to the sleepers with rail spikes or with screws and baseplates for wooden sleepers, or Pandrol or other patent clips for sleepers of all materials (including steel and concrete). Steel sleepers can be installed with other sleeper types to prolong track life, including turnouts. Plate sleepers consist of rectangular plates of size about 2′ – 10′ x 1′ – 0″. View Answer. These are not suitable for all types of rail … They were first of all used in France round about in 1914 but are common since 1950. Steel ties are common on secondary lines in the UK; plastic composite ties … Rail Profile. 2. Spring steel clip used for the fastening of rail with the sleepers is produced using EN-48 steel. Depending upon the position in a railway track, railway sleepers may be classified as: These are the early form of sleepers which are not commonly used nowadays. The train runs rapidly along two railway sleepers, the railway sleep is responsible for carrying the weight of the train and ensuring the smooth running of the train. They are much useful for heavy loads and high speeds, They have long life of 10-12 years depending upon the climate, condition, rain, intensity, nature of traffic, quality of wood etc, Good insulators and hence good for track circuited railway tracks, Suitable for salty regions and coastal areas, They are not badly damaged in case of derailment, Liable to be attacked by vermin so, they must be properly treated before use, Free from decay and are not attacked by vermins, Connection between rail and sleeper is stronger, Connection between rail and sleeper is simple, More attention is not required after laying, Liable to corrosion by moisture and should not because in salty regions, Good insulators and hence cannot be used in track circuited regions, Cannot be used for all sections of rails and gauges, Should not be laid with any other types of ballast except store, Way gauge is obtained if the keys are over driven, Having good shock absorber as there is not cushion between rail foot and ballast, High scrape value as they can be remolded, They are prone to corrosion and cannot be used in salty formations and coastal areas, Not suitable for track circuited portions of railways, Difficult to maintain the gauge as the two pots are independent, Require a large number of fastening materials, Difficult to handle and may be easily damaged, They can be produced on large quantities locally by installing a plant, Heavier than all other types thus giving better lateral stability to the track, Good insulators and thus suitable for use in track circuited lines, Free from attacks of vermin and decay, suitable for all types of soils, Initial cost is high but proves to be economical in long run, Effectively and strongly hold the track to gauge, Difficult to be manufactured in different sizes thus cannot be used in bridges and crossing, Can be damaged easily while loading and unloading. In general, the timber sleepers lay on the ballasts, and the steel rails are fixed on these railway timber sleepers so that ensuring the safety of the train. Depending upon the material, the transverse sleepers may be classified as: The timber sleepers nearly fulfilled all the requirements of ideal sleepers and hence they are universally used. Timber sleeper. Notify of {} [+] {} [+] 0 Comments . The different types of bolts used in Indian Railways are : 1. 2. The pot is oval in shape with larger diameter 2′-0″ and smaller diameter 1′-8″ is preferred. Steel sleepers requires high maintenance. Railroad steel rail and railway sleeper are commonly used on the railway lines, belongs to the key structure of railway track. They are in the form of steel trough inverted on which rails are fixed directly by keys or nuts and bolts and used along sufficient length of tracks. Hook bolts. View all comments. It exerts a toe load of 710 kg for a nominal deflection of 11.4 mm. Ballasted Rail Track For ballasted track, the railroad sleeper is fixed … 1 by bearing plates; 2 by dog spikes; 3 by keys in lugs or jaws; 4 none of these. Overview Trak-Lok® Steel Sleeper Systems incorporate the Trak-Lok ® resilient fastening system that has been developed specifically for use with steel sleepers. The following types of Steel Sleepers are as follows, Key Type Steel Sleepers in the Rail Industry – they are still made, and have quite a history. At present this type of sleepers are discarded mainly because of the following reasons. Steel Sleeper Wide Range Steel Sleepers from AGICO. How to Fix Railway Sleepers? ARSC Steel Sleepers are manufactured in an ISO9001 accredited facility to the Australian Standard AS1085.17. They remove the drawbacks of longitudinal sleepers i.e. Types of Railway Sleepers:- Sleepers are the components of the railway track on which the rails are supported and fixed to transfer and fixed to transfer to loads to the ballast and subgrade. The utility of timber sleepers has not diminished due to the passage of time. From building and art projects to their inherent scrap value, our steel sleepers are a great choice. Ultrasonic Machining Process, Working Principles & Advantages, Electrical Discharge Machine (EDM) Types, Advantages and disadvantages, Machining Operation and Types of Machining Tools, Milling Machine Definition, Process & Types, Railway Sleepers Definition, Characteristics, Treatment, What is Rails, Definition & Types of Rails. The relative advantages and disadvantages are given below. Functions of sleepers. The channel sleepers are fixed to the girders of bridges. Sleepers are transverse members of the track placed below the rails to support and fix them in position. Fang bolts. To prevent creep in rails, the steel sleepers are fixed with rails by clips, bolts and. Soil Mechanics And Foundation Engineering, Vector images is Designed by pch.vector / Freepik. Sleepers are members generally laid transverse to the rails. Fish bolts are used to connect fish plates to the rails at rail joints. 4. All LIBERTY Primary Steel sleeper systems are proudly Australian made.. Trak-Lok ® sleepers tie rails together maintaining gauge and rail position while resisting lateral and longitudinal movement of the rail. Generally laid perpendicular to the steel rails, railway sleepers could transfer loads to the track ballast and subgrade, hold the rails vertical and keep them spaced to the correct gauge. hold the rails to correct gauge. Generally, the timber sleepers lay on the ballasts, and the steel rails are fixed on these railway timber sleepers so that ensuring the safety of the train. Our wide range of steel sleepers is designed to cater for all types of application, from metre gauge railways to … 2. Prestressed cement concrete sleeper. 68. If derailment is happened, they damaged very badly and not suitable for re using. For the railway system, the railroad timber sleepers are an infrastructure. Lighter than concrete, steel railway sleepers are a popular choice for a variety of different uses. Fish bolts. Type of sleepers in Railway. Wooden sleepers are the ideal type of sleeper. Steel Sleepers. Various types of fastening have been used over the years. Our reclaimed steel rail sleepers were originally used on lower speed lines, mainly where the ballast doesn’t need to be disturbed. Therefore, the more rail sleeper, the higher strength of the rail tracks. Steel sleepers can be manually or machine laid. Main disadvantage of steel sleepers, is : A. rectangular is cross section throughout, C. 6 mm thick steel sheets with ends bent down. Subscribe. Running of the train is not smooth when this type of sleepers is used. Reinforcement concrete sleeper. The salient features of timber/wooden sleepers with advantages and disadvantages. The amount of sleepers that set per kilometer of the rail line is decided by the railway volume and running speed. Transverse sleepers introduced in 1835 and since then they are universally used. Advantages of Wooden Sleepers They are cheap and easy to manufacture They are easy to handle without damage They are more suitable for all types of ballast They are not suitable for all types of ballast which is provided as bed for sleepers. Discuss in Forum . Elements of a baseplate based rail fastening system Screw for fixing plate to sleeper Elastomeric pad supporting rail Tension washer Rail … Special steel sleepers are available for use at joints on lines with 60 lb/yd (30 kg/m) rail. D. 6 mm thick steel sheets with ends bent up. 3. The low profile design is easy to handle, stack and transport by road or rail. Intrastate and Light Weight Lines steel sleepers may be used in curves of less than 240 m radius but a reduced total life would be expected. They are popularly known as dog bolts. These sleepers use to prevent the cantilever action between the two supports of the sleeper joints. Photo about Steel rail fixed to a concrete sleeper. The terms rail anchors, tie plates, chairs and track fasteners are used to refer to parts or all of a rail fastening system. Rail to wooden sleeper --- Dog Spike, Screw spike, fittings Bearing plate & Fang bolts. Steel sleeper. Noise created by the track is considerable. Inline Feedbacks. The rails, if doublehead or bullhead type, are secured by wooden keys into cast-iron chairs which are fastened to the wooden sleepers with spikes (pre mid-1960s) or screws (see photo below). Rail to steel through sleeper -- Loose Jaws, Keys & Liners. The wood used may be like teak, sal etc or it may be coniferous like pine. Drawbacks . Timber (wooden) sleeper, it is a kind of wooden sleeper. • Sleepers hold the rails in proper position with respect to their proper tilt, gauge and level and transmit the load from rails to the ballast. Channel Steel Sleeper/Bridge Sleepers are used in the tracks running over bridges where ballast cannot be used to stabilize the track. A railway sleeper or called rail tie is a rectangular support for the rails in railroad tracks. On the other hands, the timber sleepers hold the steel tracks at … Steel sleepers are highly economical as maintenance costs are significantly lower than concrete, and old ballast can remain in place reducing new ballast requirements. The load transfers from rails to sleeper, sleeper to ballast, ballast to subgrade below. Advantages of Steel Sleepers. Railroad ties are traditionally made of wood, but prestressed concrete is now also widely used, especially in Europe and Asia. 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