Page 139 - Handbook of Materials Failure Analysis
P. 139
4 Current Analysis and Design Methods 135
Distribution of bearing pressure Moment diagram
Uniform pressure
Flexure of sleeper
produces variations
from (a)
Tamped either side of
rail
Laboratory test
Principal bearing on
rails
Maximum intensity at
ends
Maximum intensity at
middle
Centre-bound
End-bound
Improper tamping at
sleeper mid-span
Depression at rail seat
Mud pumping
Over-tamping at
sleeper ends
FIGURE 6.9
Hypothetical distribution of bearing pressure and bending moment.
