3 Vertical Curves in the Overhead Contact System 3-43Â 3. w . . 4. 7 The guidance is relevant to underground rail track in coal mines, miscellaneous mines and tourist mines. Johannesburg , and Keywords: vertical forces, lateral forces, superelevation (or cant), speed. 09). preceding paragraph and in figure 3. Apr 1, 1991 Grade Crossing Detailed Inspection Worksheet (Includes Rail Crossings) . –Swept Envelope – The kinematic envelope enlarged to allow for the 11-5. The magnitude of these stresses is greatly dependent upon the geometry of ellipsoidal wheel-rail contact patch. On roadways, vehicles have a tendency to skid in the direction of the outside of the curve if the lateral force overcomes the resistance to the friction force between the tires and the road. Track-Related Research Volume 3: Exothermic Welding of Heavy Electrical Cables to Rail -- Applicability of AREMA Track Recommended Practices for Transit Agencies (2004) At least one commuter rail agency operates at speeds of 100 mph; how- ever, the maximum speed on the majority of systems is 79 mph. Lateral Resistance of Railway Track 361 As it has been mentioned, the value of q could be determined by the lateral displacements of sleepers, and the relationship between them is as follows: nq q cycy 01 2 (2) where y is the lateral displacement of the track and qcc n01 2,, , 1 are parameters obtained from experiments[18]. Source: NYSDOT http://downloads. pdf), Text File (. 3. May 10, 2012 values of superelevation, the limit values of lateral acceleration and the For railways; equation of minimum curve radius based on the Esvelt C. main, or protect the s. 2. . Railway Main track. Superelevation Super elevation is tilting the roadway to help offset centripetal forces developed as the vehicle goes around a curve. Corridor Modeling & Cross Sections (SS4) The following resources are provided as a reference by Bentley's Technical Support Group. Railway Track Maintenance I is divided into three chapters; the first gives the fundamentals of railway engineering, and the second and third explain the roadbed, ballast, drainage of the track, and the track itself. Textbooks -Transportation Engineering Notes Pdf – TE Notes Pdf. Calculated the super elevation in a broad gauge track having a curvature of 5 degree and the equilibrium speed of the track in 60Kmph • Degree of curve= 5degree Aug 08, 2016 · Bogie parts & description - railway technical web pages, Railway technical web pages. SIDING AGREEMENTS rail--the same method used for the 100-foot chord in the. It is positive when the outer rail on a curved track is raised  rail movement, if any, that occurs while the track is loaded must be added to the Superelevation is added to curves to allow trains to operate at normal track  (Use of SuperElevation on Railways). Apr 1, 2014 1 Kinematic Analysis of the Railcar and Wheelset on Curved Track. The distance. Plot the elevation of mph) of the TGV railway track using the equation presented in the. 61, the track has a 0. track (straights) and spirals (transition curves) are situated. [8] Super elevation is the amount of elevation that the outer rail in a curve is raised above in comparison to the inner rail. As freight trains normally don’t run on high speed routes, track superelevation values may be up to 12 inches (300mm), depending upon the country. When a train rounds a curve, it has a tendency to want to travel in a straight direction and the track must resist  Feb 21, 2017 Curves and Superelevation Mr Manivel M Department of Civil To Loss 1 Pound Of Belly Fat Every 72 Hours ◇◇◇ http://scamcb. 8 mm (2 inches) per degree of curvature of track; (b) where the curve elevation of the outer track exceeds the elevation of an adjacent inner track, an additional 63. 1 Vertical Curve Lengths 3-41Â 3. Three piece freight car truck. 4 TRACK ALIGNMENT AT SPECIAL TRACKWORK 3-43Â 3. G. 12,13 Onecritical trackgeometryvariableis thecant,whichistypically expressedasthe differenceinelevationof thetworails, aquantity referred to as the superelevation. evaluate the rail, tie, and ballast condition on the track. Type R Crossings are NOT to be used for multiple track crossings within zones higher or lower than the top of the nearest rail at a point 30 feet from rail unless track superelevation makes a different level appropriate. Tangent track or curvature of 1 degree. The vibration then travels from the track, through the ground and into the building foundation. Specific types of track design and track construction are described in Sections 12 through 14. pdf. 19. or 110 tons. 286,000 lbs. It a superelevation to the railway curves is adopted. The wheel and rail interface on track curves is more difficult than in straight gauge track, i. Trimble® TrackView vehicle-based track geometry, rail profile, and track inspection system can be installed on various types of rail vehicles including locomotives, passenger rail cars, 2 Analyzing track geometry defects is critical for safe and effective railway transportation. 030” styrene strips glued onto the roadbed under the ties. A: Deflection range for track which will last indefinitely. The subgrade and roadbed are installed with a level cross- section. photo by p briand. 3 The track structure should be designed with Long welded / Continuously welded rail on main line track in case of ballasted as well as ballastless track. e. Horizontal curves are classified as under: (1) Simple curves xv m/sec2 Acceleration in metre per second square NG Narrow Gauge track, 762 mm or 610 mm gauge Offloading A condition where the load on a wheel is less than half the nominal axle load. 01 GENERAL The following sections govern the criteria to be used in the designing of industry tracks. A positive cross level refers to the case when the left rail is above the right rail, and a negative cross level refers to an instance when the left rail is below the right rail. 01 inches at 10 mph, 2. It is provided by gradually lifting the outer rail above the level of the inner rail. Trimble® TrackView vehicle-based track geometry, rail profile, and track inspection system can be installed on various types of rail vehicles including locomotives, passenger rail cars, railway, but high speeds and curved track require an engineered solution. Railway Engineering:Transition Curve As soon as a train commences motion on a circular curve from a straight line track, it is subjected to a sudden centrifugal force, which not only causes discomfort to the passengers but also distorts the track alignment and affects the stability of the rolling stock. 15. This gives a first draft alignment not taking any constraints into account. May 19, 2018 · Superelevation is the trick of raising the outer rail in a turn, by a CM or so. 4 Yard and Secondary Tracks 3-40Â 3. Where track is designed for a controlled system with basically one operation and hence a choice of superelevation and superelevation deficiency, the normal value of superelevation deficiency to be applied is 25mm. Generally, the strength of ground vibration reduces as one moves away from the track. The Track is the Input Source Train movements occur as train moves over the track • Forces, accelerations, speeds, displacements • Lateral, vertical, longitudinal • Yaw, roll, pitch • Many factors affect these dynamics • Track geometry and maintenance • Rail and wheel profiles • Train speed and handling • Train consist, placement of cars, etc. 2 Vertical Curve Radius 3-42Â 3. From MP 25. This page was last edited on 5 November 2012, at 19:15. g. The unbalanced superelevation allowed by the railroad administration. The straights and curves are determined using the least square method. The sketch to the right shows how the. or 110 tons Often referred to as a “110 ton” car or a “286K” car + 66,000 lbs. qxd 6/14/01 9:07 AM Page 65 Definitions - (1) Cant or superelevation is the amount by which one rail is raised above the other rail. used in buildings, (for light use) and some 20 pound rail placed in storage. txt) or view presentation slides online. Rail is made up of three Apr 16, 2017 · Geometric desing of railway track. Outside a curve, the two rails should be level, i. 06 TRACK CENTERS Industry track centers for multiple parallel and concentric tracks within the Railway construction. rails and superelevation (or banking) on the curve. Alignment and Superelevation D-2 Revised November, 2011 circular section is the point of curvature (PC). For . Designing a railway track, a track gauge, superelevation, a transition curve, horizontal curve radius, vertical curve radius and a gradient are identified in the curves. Reasons for laying a new railway line (1) Strategic consideration (2) Linking of trade centres (3) Connecting port with the interior of the country (4) Shortening existing route (5) Laying of a branch line (6) Undeveloped area 3-2. This data can be combined with the track geometry to obtain a complete status of the track condition. Mar 13, 2018 · Superelevation is the lateral angling of a curved roadway or track to counteract the effects of centripetal force on the vehicle traversing the curve. ALL THE OTHER NOTES WHICH ARE AVAILABLE IN THE INTERNET WITH THE NAME MADE EASY CIVIL NOTES ARE FAKE AND ARE NORMAL CLASSROOM NOTES OF SOME COLLEGE. railway systems, technologies and operations across the world. 2. degree of curvature. 1. 0 10 10 MAIN TRACK TWO No Flags Displayed 10 MPH OVER THE 15 SWITCH GOING TO AND FROM THE UP Connection. envelope * (7010mm) *formula for widening clearance envelope for. The guide covers surveying, site work, crossings, scales, bridges, trestles, box culverts, and more. INNOVATIONS IN RAILWAY TRACK Coenraad Esveld Professor of Railway Engineering, TU Delft This paper describes innovations in railway track structures. An intuitive graphical user interface provides easy access to an impressive set of interac-tive geometry tools for on-screen placement, modification, and extension of alignments. Cant (road/rail) - wikipedia, The cant of a railway track or camber of a road (also referred to as superelevation, cross slope or cross fall) is the rate of change in elevation Curve resistance (railroad) Since curves are usually banked by superelevation, there will exist some speed at which there will be no sideways force on the train and where therefore curve resistance is minimum. plant railroad leases the track from the general system railroad and the lease provides for (and. CSXT Standard Dwg. Curved Track, Transition Curves & Superelevation ( Cant) . Grade compensation on curves 11-11. As a Master student, you will work on every day railway challenges. where the curve elevation of the outer track exceeds the elevation of an adjacent inner track, an additional 63. Dry rail. 8F 10 10 MAIN TRACK 2 No Flags Displayed Belt Railway Company of Chicago 4 Now operated by short line Madison Railroad, the track rises 413 feet over a distance of 7012 feet - a 5. Bending of rails on curves 11-12. Measuring range: • Track gauge 1415 mm to 1500 mm • Superelevation -30 mm to +200 mm • Measuring accuracy +/-0. 0 or higher). A transition curve is, therefore, the cure for an uncomfortable ride, Automatic Analysis of Standards in Rail Projects security and comfort characteristics of the track. Ltd * Under revision Lecture-2 Component parts of railway track The Typical . Files are available under licenses specified on their description page. 34 percent ascending grade. 8 Write the types of horizontal curves. 4 mm (1 inch) of centre of the curve. 3-1. Then the outside rail of the track can be raised with 1/32” wood strips or 0. 3 Superelevation in track on bridges in curve. pdf Finally, at station 0+100. This technical memorandum presents the basis of design and alignment criteria for the segments of the California High-Speed Train Project (CHSTP) alignment where high-speed trains are operated on tracks exclusive of other railroads. for Class 2 and 3 tracks. 61 to MP 24. In the case of a double track, three panels are used to define the design data. of rail track. 8 The guidance may be of use to other sectors outside the mining industry that use narrow­gauge rail track, such as the tunnelling sector and narrow­gauge railway operators. Rail Gap. PDF | One of the most important parameters of the horizontal railway alignment is horizontal curve radius including the shape of transition curve and superelevation ramp. 5 mm (2-1/2 inches) per 25. section. Here is the access Download Page of MODERN RAILWAY TRACK BOOK PDF, click this link to download or read online : MODERN RAILWAY TRACK BOOK PDF Apr 12, 2013 · Track Geometry and Stability 4. Select design wheel load based on most common, heaviest car and desired track speed. SIDING AGREEMENTS Strictly speaking only a tamper lifts and lines track i. org/SuperelevationDiscussion9 -03. 3. single ballasted track, straight, without superelevation [MÁV, 2014] The paper introduces the potential of this technology as material to be used in railway track Construction gauge 2-8. • The inner rail is taken as the reference rail and is normally maintained at its original level. This requirement is in line with the principle that a level of positive deficiency is desirable to promote consistent vehicle tracking. k is the curvature and A is the clothoid parameter. 1 Reverse Vertical Curves 3-43Â 3. speed (mph) a. Select rail size and section 4. 5-2. above top-of-rail: w = h x e/1504 position coordinates (height and locations in the plane) and the track width. At 2. In case of mixed traffic All new tracks and ties shall be supplied by CSX Railroad. From MP 24. Superelevation or cant (Ca) is the difference in height between the outer and the inner rail on a curve. The Text Import Wizard streamlines import of track geometry Power Rail Track is a comprehensive application for preliminary and detailed 3D design of rail Plan of Indian Railways 14 , Classification of Railway Lines in India 16 , General Features of Indian Railways 18 , Important Statistics of Indian Railways 21, Undertakings Under Ministry of Railways 25 2. of 1922, the Railway Board issued a Schedule of Maximum, Minimum and Recommended Dimensions to be observed on all 1676mm gauge Railways in India. ppt - Free download as Powerpoint Presentation (. Cant D superelevation (or banking), which effectively raises the outside rail in the curve by rotating the track structure about the inside rail. Restrictions for 59TH ST LINE (MP 0F TO MP 5. Special attention is devoted to altern a - tives for ballasted track, with emphasis on low -mai ntenance solutions, together with versatile high-speed track and heavy haul track for the 21st century. Track Train Dynamics to Improve Freight Chapter IV. for an air gap may be waived. – 2 inch superelevation. • From the British Railways Track, Volume 9, Track Terminology book: –Swept Path – The plan area occupied by a rail vehicle as it moves along a track. The arrows at the bottom Bentley Rail Track A global rail design software Automates design workflows for every kind of rail projects Supports new and upgrade projects for single or multiple tracks Standardizes project outputs – drawings, volumes, construction reports etc. Bridges interact the vertical layout cant, and superelevation design; and analyze geometry as concurrent, integrated activities. • It is provided by gradually lifting the outer rail above the level of the inner rail. 101-16, 101-17, and 101-18. of the longitudinal coordinate [16] (2-2) if s=s. The various rail drillings and joint bar punches require various lengths and diameters of bolt assemblies. Get modern railway track book PDF file for free from our online library PDF File: modern railway track book. Superelevation is the banking of a roadway along a horizontal curve so motorists can safely and comfortably maneuver the curve at reasonable speeds. Gross Rail Load (GRL) (actual light weight will vary somewhat depending on car size, III. Download as PDF The minimum curve radius of a single high-speed railway line should ensure that when the 250, Ballastless track, 3277, 3958, 3073, 3110, 2634, 1979, 3500, 3000, 3000 Its length should be calculated and determined based on real superelevation and slope rate of superelevation (see Table 8. 00 the full superelevation is reached. ; (1989): Modern Railway Track, Graphics Department of Thyssen Stahl A. Ties s hall be installed with the top of the tie (or the tie plate) in ful l contact with the base of the rail and the bottom of the tie near the rail seat in full contact with the ballast. The inner rail is taken as the reference rail and is normally maintained at its original level. This allowance is either given in general, or for a certain type of train. 9 16. ban31881_ch04. Determination of Minimum Horizontal Curve Radius Used in the Design of Transportation Structures, Depending on the Limit Value of Comfort Criterion Lateral Jerk Ahmet Sami KILINÇ and Tamer BAYBURA, Turkey 1. Cant Deficiency and Negative super-elevation 11-9. An all-in-one rail solution, Bentley Rail Track offers a full complement of functionality that enables users to work seamlessly with survey, GPS, LiDAR, and other forms of field data. In a complete model of the dynamics of a railway vehicle, the vehicle is assembled from wheelsets, What is Superelevation in Highway Engineering? Superelevation is the transverse slope provided to counteract the effect of centrifugal force and reduce the tendency of vehicle to overturn and to skid laterally outwards by raising the pavement outer edge with respect to inner edge. transportation. Nov 22, 2018 On the pre-revival Festiniog Railway cant was an essential track feature There is a formula for calculating the ideal amount of superelevation  High-Speed Rail Authority and for application to the California High-Speed . Sections 1 through 11 of this document describe the common track elements used on all types of track construction. Table 12-2 - Recommended Superelevation for Curved Track . In Australia, railway track maintenance costs comprise between 25-35 percent of total freight train operating costs. 5: 8 of 21 Hunting Caused by: Empty or lightly loaded cars (though heavy cars can also hunt). power generation using railway track synopsis Using charge from the power source and discharging it. 3 The minimum distance between track centre lines shall be increased to account for curvature and superelevation as follows: 1. It is positive when the outer rail on a curved track is raised above inner rail and is negative when the inner rail on a curved track is raised above the outer rail. Therefore the lower service speed achievable by light rail when Track Safety Standards. The distance between the rails, as shown in the figure, is what is known as standard gagein North America. train wheel and the railway track. Sep 01, 2000 · Railway Track Engineering rail straight straight edge stress superelevation surface switch Table tamping machines tongue rail tonnes track geometry track The cant of a railway track or camber of a road is the rate of change in elevation ( height) Track unbalanced superelevation (cant deficiency) in the United States is restricted to 75 Archived from the original (PDF) on September 29, 2009. iun file to the right of the “VPI and S”. Gaps are indicated in fractions of an inch and temperature is in Fahrenheit. 5 mm evaluate the rail, tie, and ballast condition on the track. Flex track is also available with built-in superelevation. If necessary add additional VPIs. REES Module #6 - Railway Alignment Design and Geometry 1. Abstract: Rail wear has dramatic impact on track performance, ride quality and Key words: Rail wear, Vertical and lateral wear, Superelevation, Gauge,  May 2, 2013 Geometric design of Railways - Free download as PDF File (. The above steps are integrated into software like Bentley Rail-track or Leica A -track. Track Structure Design Chapter 2 documents the types and magnitudes of loads transferred from the vehicle wheel to the rail. 02 HORIZONTAL CURVATURE Tracks should be designed utilizing the minimum degree of curvature rail transport starts with understanding the basics and relationship between the multiple assets in the railway system. 220,000 lbs. 435 m Rail Rail Ballast Subgrade FIGURE 4. 5 degree curve. 5 Railroad track geometric cross section. Cant Excess 11-10. In between straights and curves spirals are computed. Along with friction, they are what keeps a vehicle from going off the road. 1. • Adjusting the track: Turning the spindles on the lateral slide bearings at the same time moves the track panel into the desired position. dgn), along the required superelevation of the outer rail on spirals and curves. Track structural defects are generated from 3 the structural conditions of the track, which include the condition of the rail, sleeper, fastening systems, 4 subgrade and drainage systems. 39 inches at 10 mph, 3. pptx), PDF File (. Our Railway Engineering group will guide you to find a scientifically based answer to solve such cases during your study, and thus bring Railway Engineering Made Easy GATE Handwritten Notes Download PDF PLEASE NOTE : WE PROVIDE ONLY VERIFIED NOTES AND MATERIALS.  Maximum Gross Rail Load (GRL) of a 110 ton, 4-axle railcar is 286,000 lbs. Superelevation. SECTION A - MRT ALIGNMENT 2. (Generalized) 1. Introduction. – 10 feet high object. Onloading A condition where the load on a wheel is more than half the nominal axle load. Transition Curve. The suggested superelevation is 0. B: Normal maximum desirable deflection for heavy track to give requisite combination of flexibility and stiffness. Any deviation from these requirements must be approved by Railway’s Chief Engineer or designated representative. appropriate CSXT office in Portable Document Format (. The width of the swept path at any point is the same as the width of the swept envelope at that point. ppt), PDF File (. 7-percent grade south of Saluda, N. A steeper superelevation rate is required as speeds increase or horizontal curves become tighter. The superelevation of the track, describing the height difference between left and right rail. Designers should not include the design speed of a horizontal curve on the plan sheets. The purpose of superelevation is to compensate acceleration emerging in the curve thus assuring comfortable passenger transportation and equal wearing of both rails. Typical values for some specific countries are shown in the table below. However, the strength of vibration may increase when moving up floors inside the building due to resonances of the building structure. 030” in HO scale (about 1/32”), which seems small but is visually effective. For MRT rail systems track gauge shall be 1435mm. 1). 4 Vertical Curvesâ Special Conditions 3-43Â 3. Caltrain Standard Specifications 20120-6 September 30, 2011 TRACK APPURTENANCES & OTHER TRACK MATERIAL 3. Effects of Superelevation and Speed on Vehicle Curving in Heavy “I have a problem with rail wear and gage widening. Railway Track Gauge 31 Gauges on World Railways 31, Different Gauges on Indian Railways32, Choice of Gauge 32, Problems Caused by Change of New Advances in Analysis and Design of Railway Track System. com/bkfitness3/pdf Centrifugal Force on a Curved Track • A vehicle has a tendency to travel  to travel well below the maximum allowable track speed. Superelevation raises the outside rail n the curve by o rotating the track structure about the inside rail. desirable that both main tracks of the line have the same superelevation on a  In the same way that race car tracks are banked to allow drivers to safely go at higher speeds, the so-called “superelevation” (Ea) of the outside rail of the track  3. However, it is very difficult to calculate superelevation when designing and maintaining a railway track, because the estimation of actual train speed on the curves is very complicated. Superelevation shall be achieved by maintaining the top of the inside rail at One of the most important parameters of the horizontal railway alignment is horizontal curve radius including the shape of transition curve and superelevation ramp. 5 the cant angle and superelevation height is dictated by the rail gauge according to simple Analytical-Ride-Comfort-Evaluation-Railway-Coach. Alignment considerations weigh more heavily on railway design versus highway superelevation as well as guiding the railway vehicle from tangent track to  However, it is very difficult to calculate superelevation when designing and maintaining a railway track, because the estimation of actual train speed on the  Definitions - (1) Cant or superelevation is the amount by which one rail is raised above the other rail. 3 The minimum distance between track centre lines shall be increased to account for curvature and superelevation as follows: a) 50. 5 Allowable Superelevation in Adjacent Tracks . measured at the halfway point of the stringline cord, the 31-. 0 to MP 24. 5 kg Other gauges available upon request. Must be done gradually over a distance without noticeable reduction in speed or safety Where track is designed for a controlled system with basically one operation and hence a choice of superelevation and superelevation deficiency, the normal value of superelevation deficiency to be applied is 25mm. A superelevation ramp is a section of the track where the cant changes gradually. The track profile is defined in space by a vertical profile, horizontal plane, and by a transverse vertical profile as shown in Figure 2. pdf), Text File If a curve is provided on a track with ruling gradient, the resistance of the Where, e is super elevation in mm; G is the gauge in mm + width of the  The Heritage Railway Association, Limited by Guarantee, is Registered in England and Wales No. Track and Rail and Infrastructure Integrity Compliance Manual Volume II, Chapter 1 – January 2017 2. pdf. Curve data, superelevation data, and coordinates of each control point are displayed within the G sheets on tabulations . Rate of change of cant or cant deficiency • This is the rate at which cant deficiency increases while passing over the transition curve, e. 6. 20, the track has a right -hand curve with 2° , 6-minutes curvature and 3 inches of superelevation with 0. Corridor Creation & Manipulation Therefore a prototype superelevation (height of outside rail above inside rail) of three inches results in tilt of three degrees. Select a Track Modulus, u or k, based on desired design deflection 3. 5m (31 ft). Selecting the horiz and vert alignment files. DUDLEY ST UNDERPASS STANDARD GAUGE TRACK DUAL (sg + bg) TRACK BROAD GAUGE TRACK Home Signal Systems Signal Symbols Lineside Boards General Symbols Safe Working Signal Conclusions From the presented outputs of a comprehensive diagnostics of track alignment design and track geometry of the track it is clear that geometric parameters superelevation (PK) and gauge (RK) after putting track into operation complied with the prescribed tolerances. Adjacent BROAD GAUGE track and signalling is only included to the extent of identifying signals that permit access to the s. Again the gradients and curves are determined using the least square method. main at grade crossings. Number __ 1 2715 A MP to MP HER FRT PSGR Track 0. (weight of car + contents or “lading”)  Nominal capacity = 220,000 lbs. If the track subgrade is on risers, the tops of the risers can be cut or set at the appropriate very small angle, but this is difficult to control. Maximum Gross Rail Load (GRL) of a 110 ton, 4-axle railcar is 286,000 lbs. another highway or the tracks of a railway. Note that the scale of the rail has no bearing on the size of the gap required. All structured data from the file and property namespaces is available under the Creative Commons CC0 License; all unstructured text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. The light rail system serves, in effect is its own feeder, requiring fewer miles of bus route. The locomotive and Then the outside rail of the track can be raised with. 4 mm (1 inch) of difference in curve elevations between the adjacent tracks. • The rail surface is dry, with a nominal COF of μ= 0. Using the arc definition for a circular curve, the degree of curvature is the central angle (D) subtended by a 100 ft arc. Cant (road/rail) The cant of a railway track or camber of a road (also referred to as superelevation, cross slope or cross fall) is the rate of change in elevation (height) between the two rails or edges. Transport for NSW acknowledges the traditional owners and custodians of the land, and respects Elders past, present and future. 5 STATION PLATFORM Railway Engineering-9b - Track Junctions and Track Layout - Free download as Powerpoint Presentation (. pdf) and MicroStation (. 1 Track gauge is the distance measured between the inside face of the two running rails at a point 14mm below the crown of the rails (gauge points). – 5. 2 Designated Line Rail for Tangent Track . 4 TRACK SUPERELEVATION Superelevation shall be constant through circular curves, except those lying in acceleration or deceleration zones of direct fixation track. 4 mm (1 inch) of Superelevation data is displayed with the plan curve data. CONSTRUCTION DETAILS This work shall be done as specified herein in accordance with CSXT standard specification, dated August 8, 1988 (Revision dated May 27, 1997) and the following CSXT standard drawings: 1. track and adjacent structures. foot mark, to the head of the rail in inches is equal to the. The point at which two adjoining circular curves turning in the same direction meet is the point of compound curvature (PCC). gap accounts for tolerances of (inches) table of envelope widening. 81 Domains indicated in Figure 4 are described as follows [1,2]. Answer: Superelevation Control I am using horizontal alignments to control the horizontal location of my median and edge of pavement curbs. G is the gauge of track + width of rail head in mm. Super-elevation or cant 11-6. a. Apr 12, 2013 · Track Geometry and Stability 4. ,. C. 3F) Void Item Bulletin Form No. Here as well, the magnitude of the superelevation does not affect the process: the movement is purely a horizontal one, which has no detrimental effect on the level or the superelevation of the track. Many investigations have been carried out to develop reliable formulations for the In Bentley Rail Track, turnouts – including fundamental types based upon international standards – are stored in a user-definable library and placed dynamically. edu/modules/module0003/Superelevation. 2 Combined Vertical and Horizontal Curvature 3-43Â 3. Definitions Side Friction - the friction force between a vehicle’s tires • The contact area at each wheel tread / low rail interface is approximately circular, with a typical radius of 7mm. Factors affecting super-elevation (1) Frictional resistance(3) Body of the vehicle (2) Coning of wheels (4) Weighted average 11-7. (weight of car + contents or “lading”) Nominal capacity = 220,000 lbs. the tangent track. Ties shall be installed perpendic- ular to the rails and properly tamped and spiked. 5 Concrete Tie Spring Rail Clips . 2 Ride comfort and running safety of track vehicle dynamics should be satisfied. Sep 01, 2000 · Railway Track Engineering rail straight straight edge stress superelevation surface switch Table tamping machines tongue rail tonnes track geometry track the deviation from this super elevation. ppt / . The table below provides recommended gaps for the ambient temperature when the track is laid. Roller side bearings. Superelevation: A train, as well as any object, traveling a curved trajectory experiences a force pushing it to the external part of the line, known as centripetal force. good • Track gauge • Superelevation • Light-weight, handy size • Aluminium rectangular tube • Gold anodised, insulated • Superelevation measuring integrated • Weight ~2. This curve is 2,615 feet long. Superelevation The difference in elevation between the outside rail of the curve and the inside rail of the curve measured between the highest point on each rail head. For this we use the graph of curvature and super elevation. Getting Started with RoadRunner Rail RoadRunner Rail 10 6. Everything seems to work fine until I add superelevation control the the edge of pavement pivoting Remove Superelevation SEP rounding I would like to remove all rounding from my SEP file. 55 in the curve. 03 Superelevation Using a Straight Line Method.  Often referred to as a “110 ton” car or a “286K” car + 66,000 lbs. At higher or lower speeds, curve resistance may be a few (or several) times greater. This includes horizontal curves for the edge returns. In fact and in very simple terms, railway capacity is a function of managing three basic areas of influence – the efficient use of assets and resources, the management of flow and operations and the overall basic track structure CARBON FOOTPRINT OF RAILWAY INFRASTRUCTURE 6 ACKNOWLEDGEMENTS The report commissioned by the International Union of Railways has been produced by the independent consultant François Cuenot and coordinated by Gabriel Castañares Hernández, Senior Advisor of Energy and CO 2 to the Sustainable Development Unit of UIC. Superelevation • Superelevation or cant Superelevation or cant (Ca) is the difference in height between the outer and the inner rail on a curve. The amount of superelevation that you should use depends on a few factors but I think the most important one is what you are modeling. for superelevation. Mar 31, 2013 The book on Railway Curves was originally published in. Railway cross sections are as shown in Figure 4. The “END PROFILE” and two dollar signs must be at the bottom of the input file. 735-W. 4 Date of last revision: 01 Jul 13 Page 2 of 10 the circular steel wheel to roll, as opposed to slide, along the track. 55percent ascending grade. Train in Simultaneous Buff & Draft -Torque Produced - Force Applied at Coupler Resisted at the Rail COPYRIGHT AREMA 2008. 13. 05 Section . Abstract : This project is used for generating picnic table plans pdf electrical power by simply Schedule of Dimensions for Indian Railways, 1676mm Gauge Dear Sir/Dear Sirs, With their circular letter No. 8 mm (2 inches) per degree of curvature of track; 2. Track designs ensure that curve radius is designed to the relevant route speed without the need to exceed this value. On curved track, the cant Mar 19, 2019 · In general, railroad track is consists of rail, rail joint, railroad tie and Non- ballasted track, also called ballastless track, is the railway track. Rail, with some 12 lb. Diagram: Roadbed Sections and Grading for Industrial Track Turnouts (2603) . measurement is made. REES Module #6 - Railway Alignment Design and Geometry 7 Horizontal Geometry – Superelevation Highway Railroad Expressed by… “e” expressed as cross-slope in percent “E” is inches of elevation difference between “high rail” (outside) and “low rail” (inside) Function of… Vehicle speed, curve radius Thus superelevation may be practically applied by the use of a sprit level where a spacer block the thickness of equilibrium elevation Ee is applied to the bottom of one end and placed on top of the inside rail of the curve and the unmodified bottom of the other end of the sprit level is placed on top of the outside rail . Transnet Freight Rail in their Track Testing Centre in Jeppestown,. In case of mixed traffic Railway and Rail Transit Track Infrastructure and Components; Rail Safety and Risk; Railway System Operational Performance, Capacity and Efficiency; Student Research Opportunities; Railroad Engineering Library Collection; AREA Proceedings Online Archive; Laboratories. For flat curves with a degree of curve less than 0° 30' superelevation is  High Speed Rail Tilt Train Technology: AState of the Art £urvey in superelevation measured at two points on the track (usually over a distance of 9. CIRCULAR CURVE COMPONENTS. 04. Other Tie 1. Track geometry The railway tracks, and more specifically the rails, are used to guide the train wheels evenly and continuously along a profile. Track capacity 2-9. In the case of a single track, select the horizontal and vertical alignments using the browse buttons. That causes squealing, loss of efficiency, damages the rail, and reduces breaking effectiveness. ( e) Inadequate superelevation increases the pressure on the outer rail and,  effect of superelevation or banking of curves on real railroads. 75 chains radius, 1. The point at which the alignment changes from a circular to a tangent section is the point of tangency (PT). In that Schedule, certain Read Online Now modern railway track book Ebook PDF at our Library. The idea is to avoid the wheel flanges touching the rail. (See Figure 6-6) The point, at which this elevation of the outer rail relative to the inner rail is such that the weight is again equally distributed on both rails, is considered the equilibrium elevation. RAIL TRACK MAINTENANCE PLANNING: AN ASSESSMENT MODEL ABSTRACT. curvature and superelevation as follows: (a) 50. Chapter 3 Section 3-02 Horizontal Alignment and Superelevation 4 2014 December EXHIBIT 2. 4 Additionally, prioritized track geometry repair work reduces dynamic vehicle and track interaction, thus Single Track • Characteristics –Single track –Ballast surface rotates with superelevation –Sub-grade widens to accommodate high side superelevation, but cross-slopes remain constant 1. System 10 includes a railway track 12 that has a left. Determine moment and loading coefficients 5. 28 inches at 15 mph and 4. Power generation using railway track pdf An electrical power generation system comprises. Track Design Handbook for Light Rail Transit, Second Edition 3-ii 3. the cant should be zero. 50. M. THIS E-BOOK HAS BEEN COLLECTED FROM OTHER SOURCES OF NET. The technical concept of a railway track consisting of ballast, sleepers, and rails is very old and has stood the test of time. Two-13” double shouldered tie plates, four rail anchors, and eight track spikes (or corresponding rail seats and elastomeric fasteners) per tie 12” of Granite ballast (AREMA #4) placed to support the proper vertical and horizontal track alignment. In Power Rail Track, turnouts – including fundamental types New Advances in Analysis and Design of Railway Track System 79 Wheel-rail contact stresses mainly include rolling and shear stresses [1]. 1/32” wood strips or  Super elevation is tilting the roadway to help offset centripetal forces http:// techalive. Determine the number of bolt assemblies of each size requires. #2511, Superelevation of Curves 2. 01 GENERAL The following sections govern the criteria to be used in the designing of industry tracks served, or to be served, by the Railway Company. A railway train running along a track is one of the most complex dynamic systems in engineering and its operation has two main features: motion in a string of vehicles, and guidance by the track [26]. Norfolk Southern provides customers with Track Design Information in a guide. The supervision of the railway track is very important for maintaining it because the above mentioned parameters have to be kept in their permissible limits. 11. 7 makes the operation part of the general railroad system of transportation. That solution is “superelevation” which is also known interchangeably as “cant. 89-percent grade. Such a system is simple and can be. 3 Vertical Curves 3-41Â 3. 18. When widening the track, only the inside rail is moved, Superelevation is simply the railroad's equivalent of banking a curve on a highway, with which we. 5. TRACK DESIGN 3. Track maintenance planning models have been shown to reduce maintenance costs by 5 to 10 percent though improved planning. The difference in elevation between the outer rail and inner rail is called super elevation or cant. system railroad for purposes of moving only cars shipped to or from the plant. 12 inches at 15 mph and 5. Industry tracks shall have minimum 30 feet, or one half the length of a rail car, whichever is greater, of track from the end of the last car spot on the unloading track before the End of Track Device (see section 4. Air Transportation Planning & design – Virendra Kumar & Satish Chandra-Gal Gotia Publishers 1999 5. mtu. Speed of trains on curves 11-8. 04 BOLTS, NUTS, AND SPRING WASHERS A. Consider all wheels in a truck and proximity of adjacent cars. 10). This is normally greater where the railway or road is curved; raising the outer rail or the outer edge of the road providing Superelevation, Cant deficiency and Cant excess - (1) Superelevation/cant (a) The equilibrium superelevation/cant necessary for any speed is calculated from the formula . 05 inches at 20 mph. g. Train speeds above 45 mph. A circle has an internal angle of 360° and a circumference of 2πR. 4 chains radius, 1. 1 Horizontal Curves 2. 54 inches at 20 mph. The title for steepest main-line grade long rested with Norfolk Southern (and predecessor Southern Railway) for its 4. 4. Station Track / Platform Track A track for the purpose of bringing a train alongside a station platform for a stop to embark / disembark passengers. , the rail superelevation, which has an impact on the wheel–rail interaction at curves and influences the value of uncompen- se/spargeometri. glishbridgemanual/Exempt_Structures. In order to counteract this force, the outer rail of the track is raised slightly higher than the inner rail. scrra engineering instructions revision issue: 2-12-09 southern california regional rail authority track maintenance, right of way and structures, Railway track irregularity measuring is a task of fundamental importance to guarantee operating safety and arrange proper maintenance, particularly for the high‐speed lines. Agarwal PDF DISCLAIMER : I AM NOT THE ORIGINAL PUBLISHER OF THIS BOOK ON NET. In order to smoothen the shift from the straight line to the curve, transition curves are provided on either side of the circular curve so that the centrifugal force is built up gradually as the superelevation slowly runs out at a uniform rate (Fig. , 15th Edition – 1994. • The rail steel can be assumed to have a shear yield strength of k=70 ksi. Where C is cant/superelevation in mm. Toolbars can be customized, grouping commonly used tools for repetitive tasks Bentley Rail Track is a comprehensive application for preliminary and detailed 3D design of The ideal superelevation at different speeds according to the Molesworth formula are: At 1. Identification of defective ties. On the other hand, track geometry defects (referred to as geo-defects in the Single Track • Characteristics –Single track –Ballast surface rotates with superelevation –Sub-grade widens to accommodate high side superelevation, but cross-slopes remain constant An all-in-one rail solution, Power Rail Track offers a full complement of functionality that enables users to work seam-lessly with survey, GPS, LiDAR, and other forms of field data. To aid in making informed curve superelevation decisions on mixed-use rail corridors, this paper first. Principles of Traffic Engineering – Garber & Hoel, Cengage Learning. Railway Engineering -August – Prabha & Co. Repairing the 3 right number and type of track geo-defects can appropriately reduce the probability of derailments. , Feb 2010 Civil Design Criteria – A1. 8, Reconfirmed 03 July 2019. INTRODUCTION In this study as distinct from other studies, minimum horizontal curve radius is derived using the limit value of lateral Jerk. Most of the rail used on the SPRR is 16 lb. Jul 3, 2019 Addition of Rail Management Centre Shift Manager title as Will lifting and lining to provide superelevation or through crossovers have an  Jan 9, 2017 Geometric Design of Railway Track Safe speed Based on Super Elevation (b ) Length of Transition Curve: According to Indian Railway. R is the radius of the curve in metres. ” 2 two groups: track structural defects and track geometry defects. completes actual “surfacing” Superelevation/Cant - track Rail Cant Track cant or superelevation is the difference in level of the two adjacent rails usually in curved track Rail cant is the inclination of the base of the rail relative to the sleeper base. 3 5. 0 =0at the start of the transition curve where. March 2010 by Shri V B 2. Superelevation or cant Superelevation or cant (C a) is the difference in height between the outer and the inner rail on a curve. To combat the damaging effect of centrifugal force, a superelevation to the railway curves is adopted. Page ii. 4 mm (1 inch) of Railway Engineering-Curves and superelevation. The rail must support the vehicle and the resulting loads by absorbing some of the impact and shock and transferring some forces back into the vehicle via the wheels. Contrary to safety, which can be indicated by the wheel-rail forces in the track deficiency / excess, but also by the geometry of superelevation ramps and the  Jan 19, 2015 2. downward force on the outside rail of the curve will be greater than the downward track where superelevation is typically limited to not more that 8 inches. The clothoid type of transition curve has a linear function of chainages, i. 2 HORIZONTAL ALIGNMENT 2. 6 Engineering (Tra ck & Civil) Standard ETF-05-01 Track Geometry Standards for Construction, Upgrading and Maintenance Works Version 1. INDUSTRIAL TRACK DESIGN 4. The force of gravity acts down the resulting incline to pull a rail vehicle towards the center of the curve, helping to create the necessary centripetal curving force. at the top of the clearance. htm anual/ caddmanual. Cutting curvature and superelevation as follows: (a) 50. Feb 21, 2017 · Superelevation • Superelevation or cant Superelevation or cant (Ca) is the difference in height between the outer and the inner rail on a curve. Industrial Track Design March, 2011 IV. Enables design checking and validation Design to field interface Integrates with Bentley Railway capacity is often believed to be solely a function of the amount of rail infrastructure a railway has in place. The point of derailment was located at MP 24. 8 mm (2 inches) per degree of curvature of track; b) where the curve elevation of the outer track exceeds the elevation of an adjacent inner track, an additional 63. Any deviation from these requirements must be approved by the Railway’s Chief Engineer or designated representative. Vertical curves should  Railroad and rail crossings are treated in the same manner as roadway intersections in determining intersection sight distance for the vehicle crossing the tracks. 8 connection and may be viewed using Acrobat Reader (version 3. superelevation is represented by “ e ”. superelevation at any specific height. Scribd is the world's largest social reading and publishing site. Download Link: GOOGLE DRIVE Link To Railway Engineering 2nd Edition By Satish Chandra, M. actual practice entails) the exclusive use of that track by the plant railroad and the general. −Tampers capable of working with references can put track back on design −With only internal chords as reference, the tamper will only be able to smooth with the following long-term impacts: −Curves points will drift, possibly with mismatched superelevation −Curves will drift from uniform to variable radii Copy all stations from the superelevation input file for the left side of the roadway and paste in the superL123. Printable Version: Standard Respecting Railway Clearance is available in PDF format (file size 543kb) which will download in approximately 2 minutes and 34 seconds on a 28. The reference rail: 403: Gauge on curves: 404: Definitions: 405: Safe Speed on curves: 406: Super elevation, cant deficiency and cant excess: 407: Length of transition curve and setting out transitions: 408: Running out super elevation: 409: Indicators/Boards provided in curves: 410: Speed over turn-out curves: 411: Permissible speed over curved main line at turn-outs: 412 The minimum railway curve radius is the shortest allowable design radius for the centerline of railway tracks under a particular set of conditions. 0F 3. • A gradient of 1 in 1000 means that a cant or a deficiency of cant of 1 mm is attained or lost in every 1000 mm of transition length. This track geometry refers to the track profile in ‘space’. This is because of its ability to have branches, to extend for longer distances at low investment, and to have more frequent stations. Conventional measuring methods cannot satisfy the requirements of accuracy and time‐efficiency simultaneously. Superelevation is a measurement, generally in inches, of the relative difference in height between the top rail surface (tread portion of a railhead) of the inside (low rail of a curve from the tread portion of the railhead of the outside (high) rail. at go's discretion the requirement. It has an important bearing on construction costs and operating costs and, in combination with superelevation (difference in elevation of the two rails) in the case of train tracks , determines the maximum safe speed of a curve. Research and Innovation Laboratory (RAIL) Laboratory Capabilities; Site 5. superelevation in railway track pdf