Dehogging of Rail Ends
Hogged rail ends can be dehogged with the help of MSP in the following manner (Fig. 20.16).
1. The dip at the joint sleeper (a) is measured by using a 1.5-m straight edge and a feeler gauge at a distance of 50 mm from the rail end.
2. The dance at the joint sleepers (d), which is the gap between the sleeper and the ballast, is measured by a canne-a-boule or dansometer.
3. The joint sleepers are lifted and packed to a value equal to d + a + a', where
d is the value of dance, a is the amount of dip, and a' is equal to a or 5 mm, whichever is lower.
After allowing traffic to run on the track for a period of two days, the adjoining sleepers are beater or shovel packed depending upon whether it consists of metal or wooden sleepers. The dehogging of rail ends is achieved because of the train loads. It may be necessary to repeat this procedure in case the rails are not completely dehogged.