Civil Engineering - Highway Engineering - Discussion
Discussion Forum : Highway Engineering - Section 3 (Q.No. 6)
6.
The correct formula for calculating superelevation for the hill roads, is
Discussion:
3 comments Page 1 of 1.
Ehsan Ullah said:
6 years ago
Here ''e'' = Super elevetion, ''V'' =Speed , ''R''=Radius.
(2)
Hardik Dabhi said:
7 years ago
@Shashikant.
Case-01. Equilibrium superelevation.
If fall centrifugal force is contracted by
Super elevation alone that is, f=0,
Hence, e+f =v^2/127R,
e = v^2/127R.
Case:2 Design superelevation:
V = 75% of design speed, f=0.
e+f =(0.75V)^2/127R
e = V^2/225.
So it is a max rate of superelevation for hill road.
Case-01. Equilibrium superelevation.
If fall centrifugal force is contracted by
Super elevation alone that is, f=0,
Hence, e+f =v^2/127R,
e = v^2/127R.
Case:2 Design superelevation:
V = 75% of design speed, f=0.
e+f =(0.75V)^2/127R
e = V^2/225.
So it is a max rate of superelevation for hill road.
(5)
Shashikanth said:
8 years ago
When we are going to use V^2/127R formula, What is the difference between these two formula's?
(1)
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