presentation on Railway Track Engineering

archdevil

Royal Member
Sep 21, 2017
374
658
India
Wear of Rails in railway engineering

TYPES
Wear on head of rail
Wear on ends of rail
Wear of rail on curve

TYPES OF CROSSING
Square Crossing
Diamond Crossing
Cross Over
Scissor Crossing
Symmetrical Split

Creep of Rails

Causes Of Creep
There are three main causes of Creep Wave motion of trains.
Expansion and contraction of rails due to variation in temperature.
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).

Grades:
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.

Presentation is attached below.
 

Attachments