# Civil Engineering - Surveying - Discussion

Discussion Forum : Surveying - Section 1 (Q.No. 2)

2.

If

*h*is the difference in level between end points separated by*l*, then the slope correction is . The second term may be neglected if the value of*h*in a 20 m distance is less thanDiscussion:

67 comments Page 1 of 7.
Khagendra said:
3 years ago

For slope (M) up to 20%.

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

Here the nearest one is 3m.

So 3m is the appropriate answer.

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

Here the nearest one is 3m.

So 3m is the appropriate answer.

(14)

NARDOS TEFERI said:
11 months ago

For slope (M) up to 20%.

According to me, the solution is;

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

According to me, the solution is;

Slope correction(Sc) = h^2/(2l).

Here d = 20m,

M = h/d,

0.2 = h/20.

H = 0.2 * 20 = 4m.

(7)

Dev Narayan Yadav said:
3 years ago

l = 20 m.

H2 = 2l,

H2 = 2*20,

H2 = 40.

And;

H = 6.32 or 6.33,

√40 = 6.32.

H2 = 2l,

H2 = 2*20,

H2 = 40.

And;

H = 6.32 or 6.33,

√40 = 6.32.

(5)

Chaan A said:
1 year ago

Explain it clearly.

(4)

Mukesh das said:
3 years ago

How it will be 3m?

Please explain clearly with the completed formula.

Please explain clearly with the completed formula.

(3)

Mukesh das said:
3 years ago

How it will be 3m?

Please explain clearly with the completed formula.

Please explain clearly with the completed formula.

(3)

Nandhu said:
4 years ago

The second term can be negleted only if the slopes flatter than 1 in 25..

That means 4%.

i.e, 4% of 20m = 0.8(4/5) ie, H shouldn't higher than 0.8m.

So option A is right.

That means 4%.

i.e, 4% of 20m = 0.8(4/5) ie, H shouldn't higher than 0.8m.

So option A is right.

(3)

Aazad said:
2 years ago

Second term will be neglected when h=3cm not 3meter for length 20 meter.

(2)

LATHA said:
6 years ago

H^2=2*20.

=6.32.

SUBSTITUTE THE VALUE IN THE FORMULA.

6.32^2/2*20+6.32^4/8*(20^3).

0.998+2.492=3.4 (approx).

=6.32.

SUBSTITUTE THE VALUE IN THE FORMULA.

6.32^2/2*20+6.32^4/8*(20^3).

0.998+2.492=3.4 (approx).

(2)

Frlyrvllz said:
5 years ago

The formula (h^2/2L)+(h^4/8L^3) is for slope that ranges from 20%-30%.

If (h^4/8L^3) is to be neglected, h^2/2L is left and if we are going to equate it with 20% the answer would be 2.8~3 and if h^2/2L is to be equated to 30% the answer would be 3.4~3 therefore the answer is 3.

If (h^4/8L^3) is to be neglected, h^2/2L is left and if we are going to equate it with 20% the answer would be 2.8~3 and if h^2/2L is to be equated to 30% the answer would be 3.4~3 therefore the answer is 3.

(1)

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