Types of Gradient In Railway Engineering - Civil Engineering

Sunday, 6 January 2019

Types of Gradient In Railway Engineering

Types of Gradient In Railway

Various gradient used on railway tracks can be classified under the following heads:
Types of Gradient In Railway track
Types of Gradient In Railway Track
a.Ruling Gradient
b.Momentum
Gradient
c. Pusher or Helper Gradient
d. Station yard Gradient.


A.Ruling Gradient

The permissible gradient usually provided in a railway track is called ruling gradient.It is maximum gradient allowed on the particular track section .Ruling gradient mainly depends up on the power of the locomotive.
Generally,with one locomotive train ,the following ruling gradients are adopted in India.
a. In plain terrain- 1 in 150 to 1 in 200
b. In hilly regions - 1 in 100 to 1 in 150

B. Momentum Gradient

The rising gradient which is followed by a falling gradient and along which trains climb more easily due to momentum acquired by them over the falling gradient ,is called momentum gradient.Thus a momentum gradient can be steeper than the ruling gradient .

C. Pusher gradient

The rising gradient which is steeper than the ruling gradient and along which trains requires additional locomotives to climb up the track ,is called pusher gradient .These types of gradients are very important in mountainous terrain where steeper gradients are necessary to reduce the length of track.

D. Station Yard Gradient

The minimum gradient provided on station yard for easy drainage is called station yard gradient or minimum gradient.
On Indian Railways ,the maximum gradient permitted in station yards is taken as 1 in 400 while the minimum gradient recommended for station yard is 1 in 1000.

................Read More(Classification of Gradient - Civil Engineering .Ruling,limiting,exceptional,minimum,average,floating gradient)

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