Thursday, 13 August 2015

Sleeper

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Sleeper is a transverse support for a railway track to give stiffness to it. the sleeper should counteract the tendency of forces, which tends to distribute the track and should acts as elastic medium between the rail and the ballast in order to absorb all the shocks and vibrations of the trains.   Functions of sleepers 1. to hold the rails to correct gauge. 2. to distribute the axle load over a sufficient large area of ballast 3. to give firm  and even support to the rails. 4. to maintain the alignment...

Coning of wheel

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If the distance between the inside edge of the flanges is kept equal to the gauge distance, the flange of the wheel would rub against the inside face of the rail. to prevent the distance between the inside edge of the flange is kept less than the gauge distance.   if the rim of the wheels rests flat on the rails, there would be lateral movement of the axle resulting in damage to inside edge of the rails. this is prevented by sloping the wheels at a slope of 1 in 20. the foot of the rail resting on the sleepers is...

Permanent way

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 A permanent way is the combination of rails, sleepers, ballasts,fixtures and fastenings, etc. This term is used to distinguish the finished and permanent track from a temporary track which is laid for temporary work, i.e. for transporting construction material etc on major construction sites.   such a temporary track is removed as soon as the construction completed. the purpose of use of a permanent way is to provide the permanent facility for safety and quick movement of normal  commercial  traffic...