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Creep of Rails

Creep of Rails

It is a horizontal movement of rails in a track. It can be minimized but cannot be stopped.

Causes Of Creep|
There are three main causes of Creep

  1. Wave motion of trains.
  2. Expansion and contraction of rails due to variation in temperature.
  3. Due to starting, accelerating, slowing down (decelerating) and stopping of trains.

Wave Motion

  • When train passes on a track, the portion of rail length under the wheel of train will under more stresses and little depression will exist.
  • As a result, this depression will cause (set) a wave motion in the rail or track

Direction Of Creep

Alignment Of Track:
Creep is more on curve track than on a tangent portion (straight track).
In upgrades tracks, Creep will be less and in down grades track Creep will be more.
Direction of movement of trains:
Creep will be more in the direction to which the loaded train moves more.

Extent Of Creep

  • Creep does not vary at some constant rate. (it is not constant)
  • Creep does not continue in one direction only.
  • Creep for two rails of the track will not be in equal amount.

Result Of Creep

  • Expansion gap is reduced, buckling of track take place.
  • Sleepers are moved out of a square.
  • Crossing points get disturbed.



About Mustafa

My name is Mustafa Awais, I am basically from Pakistan & Currently living in Saudia Arabia, I am Civil Engineer as well as Web Master.

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