RAILWAY ENGINEERING
By: Lohit Havalagi
Assistant professor, NKOCET Solapur
BALLAST
CESS
BALLAST CRIB
Ballast Crib & Ballast cess
BALLAST CRIB
BALLAST CESS
SLEEPER
RAIL
Points & Crossings
Fishplate & Fish Bolt
Level Crossing
Concrete sleeper
Cast Iron Sleeper
CONONG OF WHEELS
Coning of Wheels
Tractive Resistances
1. Train Resistance
I. Speed Independent (Rolling) Resistances
II. Speed Dependent Resistances
III. A...
Track stresses
Track stresses
Track Modulus
• Load Per Unit Length of the rail Required to
Produce Unit Depression.
• Depends Upon:
1. Gauge
2. Type of ...
Track stresses
1. Wheel loads
2. Dynamic effect of wheel loads
3. Hammer Blow
4. Lateral Thrust due to Nosing Action
5. Pr...
Hauling Capacity (H.C) &
Tractive Effort (Te)
• Load handled by the locomotive
• H.C is the Product of Coefficient of fric...
Buckling of Track Due to
Temperature stresses
Stresses in Rail
• Longitudinal Stresses due to Tractive Effort &
Braking Forces.
• Thermal stresses
• Due irregularity th...
Stresses in the Sleepers
• Stresses in sleepers depends upon:
• Wheel load
• Irregularities in the track
• Speed
• Dynamic...
• Efficiency of Fastenings
• Design & Dimension of Sleeper
• Strength of Sleeper
• Track Modulus
• Stiffness of the rail
•...
Stresses in the Ballast
Stresses in Ballast depends on:
• Elastic Property of the sleeper
• Degree of compaction
• Nature ...
Stresses in the Formation
• Stresses in subgrade is decreased by
increasing both depth & Size of the Ballast.
• Quality & ...
Unit 1. introduction to Railway Engineering
Unit 1. introduction to Railway Engineering
Unit 1. introduction to Railway Engineering
Unit 1. introduction to Railway Engineering
Unit 1. introduction to Railway Engineering
Unit 1. introduction to Railway Engineering
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Unit 1. introduction to Railway Engineering

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Railway Engineering

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Unit 1. introduction to Railway Engineering

  1. 1. RAILWAY ENGINEERING By: Lohit Havalagi Assistant professor, NKOCET Solapur
  2. 2. BALLAST CESS BALLAST CRIB
  3. 3. Ballast Crib & Ballast cess BALLAST CRIB BALLAST CESS SLEEPER RAIL
  4. 4. Points & Crossings
  5. 5. Fishplate & Fish Bolt
  6. 6. Level Crossing
  7. 7. Concrete sleeper
  8. 8. Cast Iron Sleeper
  9. 9. CONONG OF WHEELS
  10. 10. Coning of Wheels
  11. 11. Tractive Resistances 1. Train Resistance I. Speed Independent (Rolling) Resistances II. Speed Dependent Resistances III. Atmospheric Resistances 2. Resistance due to Track Profile I. Grade Resistance II. Curve resistance 3. Resistance due to Starting & accelerating 4. Wind Resistance
  12. 12. Track stresses
  13. 13. Track stresses
  14. 14. Track Modulus • Load Per Unit Length of the rail Required to Produce Unit Depression. • Depends Upon: 1. Gauge 2. Type of Rail section 3. Type of sleeper and density 4. Type of ballast section 5. Subgrade
  15. 15. Track stresses 1. Wheel loads 2. Dynamic effect of wheel loads 3. Hammer Blow 4. Lateral Thrust due to Nosing Action 5. Pressure Exerted by the flanges of the wheels on sides of rails 6. Stresses due to Irregularity of track 7. Additional stresses on curves
  16. 16. Hauling Capacity (H.C) & Tractive Effort (Te) • Load handled by the locomotive • H.C is the Product of Coefficient of friction & Weight on the driving wheels. Average value of Coefficient of friction= (1/6)
  17. 17. Buckling of Track Due to Temperature stresses
  18. 18. Stresses in Rail • Longitudinal Stresses due to Tractive Effort & Braking Forces. • Thermal stresses • Due irregularity there will be heavy impact on the rails. • Minimum Ultimate Tensile Strength of Rail = 72.42 kg/cm2
  19. 19. Stresses in the Sleepers • Stresses in sleepers depends upon: • Wheel load • Irregularities in the track • Speed • Dynamic effect of wheels on rails • Elasticity of the rail
  20. 20. • Efficiency of Fastenings • Design & Dimension of Sleeper • Strength of Sleeper • Track Modulus • Stiffness of the rail • Maintenance of track
  21. 21. Stresses in the Ballast Stresses in Ballast depends on: • Elastic Property of the sleeper • Degree of compaction • Nature of Ballast bed • Bigger the cess & size of sleeper, lesser the Pressure in ballast & formation.
  22. 22. Stresses in the Formation • Stresses in subgrade is decreased by increasing both depth & Size of the Ballast. • Quality & Gradation of Ballast influences ultimate pressure on formation.
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