Grade Compensation Mathematical Problems and Solution7th April 2019
Grade Compensation Problems and Solution
Here one mathematical example is taken for, how to determine grade compensation when the gradient and radius of curve is given.
Gradient, N = 1/15 = (1/15)⨯100 = 6.67 %.
Grade compensation = (30+R)/R
= (30+160)/160 = 1.1875%
Or, 75/R = 75/160 = 0.47%
Use minimum i.e., 0.47%.
After grade compensation the gradient to be provided on the road is 6.67 -0.47 = 6.2 % (Which is more than 4%, hence OK)
So, Grade compensation = 0.47%.