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Railway Engineering

Railway Engineering

Neeraj1
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Railway Engineering

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  1. Transportation engg 2. BY NEERAJ SINGH.

  2. RAIL GAUGE • The gauge of a railway track is defined as the clear distance between the inner faces of the two rails.

  3. Dimension of gauges 1. Broad Gauge(BG) 1676mm(5’6”) 2. Standard Gauge(SG) 1435mm 3. Meter Gauge(MG) 1000mm 4. Narrow Gauge(NG) 762mm(2’6”) 5. Light Gauge 610mm

  4. RAILS • Types of rails: • Double Headed Rails (DH Rails) • Bull Headed Rails (BH Rails) • Flat-footed Rails (FF Rails)

  5. Double Headed Rail

  6. Flat Footed Rails

  7. Bull Headed Rail

  8. Length of Rails • On Indian Railways the standard lengths are the following: • Length = 12.80 m. (42 ft.) for BG (say 13 m) and • Length = 11.89 m. (39 ft.) for MG (say 12 m)

  9. Sleepers • Sleepers are the transverse ties that are laid to support the rails. They transmit wheel load from the rails to the ballast.

  10. Classification of sleepers Wooden sleeper Metal sleeper Cast iron sleeper Steel sleeper Reinforced concrete Sleeper (R.C.C) (iii) Concrete sleeper Prestressed Concrete Sleeper

  11. Wooden Sleepers • Hard wood such as, sal and teak • Soft wood such as, chir and deodar

  12. Metal Sleepers

  13. Concrete Sleepers

  14. Hogged Rails • Due to battering action of wheels over the end of the rails, the rails get bent down and get deflected at the ends. These rails are called hogged rails.

  15. Kinks In Rails • When the ends of adjoining rails move slightly out of position, “shoulders” or “kinks” are formed.

  16. Buckling of Rails • Buckling means track has gone out of its original position or alignment due to prevention of expansion on account of hot temperature.

  17. Crushed Head

  18. Split Heads

  19. Horizontal and Transverse Fissures

  20. Flowing Metal in Heads

  21. Transverse Failure

  22. Track Fittings & Fastenings • Bolts • Dog or Hook bolt • Fish bolt • Rag bolt • Fang nut and bolt • Keys • Wooden key for C.I. Chair • M.S. key and steel trough sleepers • Stuart’s key • Morgan key • Cotter and tie bars • Fish plates • Spikes • Dog spikes • Screw spikes • Round spikes • Standard spikes • Chairs • Cast steel chairs • Mild steel and Cast Iron Slide Chairs

  23. Bearing Plate

  24. Dog Spike

  25. Screw spikes

  26. Chair

  27. Fishplate & Fish Bolt

  28. Expansion Joint

  29. CONING OF WHEELS

  30. Coning of Wheel on Level-track

  31. Creep of Rails • Creep is defined as the longitudinal movement of the rail with respect to the sleepers.

  32. धन्यवाद !

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