Civil Engineering - Railways - Discussion

@All.

U= (a+b)/2 - d.

Where a and b are the absolute levels of the 2 end axles and d is the absolute level of the middle axle.
Now the problem here is that the question here has given incorrect data. The book that this question has been copied from had actually given the middle value as 100.580 which has been misprinted as 100.530 here.

If you put the middle value as 100.580 in the above formula you will get the answer exactly.
Take a=100.505.
b=100.525.
d=100.580.
Now solve you will get 0.065 m as the answer exactly.

Unevenness - The longitudinal unevenness of rails is measured as a deviation in the vertical plane (depression or rise) of the middle axle of the measuring bogie with reference to the average position of the two outer axles.

The outer axles are spaced 3.6 metres apart and unevenness is recorded to a scale of 1:1 on a base of 3.6 M for left and right rail separately.

Find mean of all, you ll get 100.520

Unevenness = |100.505 - 100.520| + |100.530 - 100.520| + |100.525 - 100.520| divided by 1.8 = 0.063888.

(100.505 + 100.525 + 100.530)/3 = 100.520.

Unevenness = { (100.505 - 100.520)+ (100.530 - 100.520) + (100.525 - 100.520) } ÷ 1.8 = 0.065.

But if we are calculating the mean we are getting zero how are we supposed to solve? Can anyone explain me?

Take the mean of all values.

(100.505+ 100.525 + 100.530)/3 - - 100.520.
Unevenness -- 100.520/1.8.

100.505,100.530,100.525 level.

.505, .530, .525.

0.005 + 0.030 + 0.025 = 0.060 m.

I am not getting this. Please, anyone explain it in clearly.

Please solve this question with an explanation.

Anyone solve this question with clear solution?