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 than
. The second term may be neglected if the value of h in a 20 m distance is less than
m1 m
2 m
3 m
Discussion:
68 comments Page 4 of 7.
Sachin said:
6 years ago
ASSUMING L=100m then ,Cs=(400/(2*100))+(8000/(8*100^3)= 2.001m.
Which less than 3m.
Which less than 3m.
Ajaypal singh nirala said:
6 years ago
If the value of h is maximum then h^4 value is greater than the other value. So how is possible to this? Value goes nearest to zero right?
Kartabo Ketema said:
5 years ago
How it will be 3m? Explain it with the formula.
Sandesh said:
4 weeks ago
The second term (i.e., the slope correction itself) becomes negligible when the slope is gentle. A common rule of thumb is:
If ℎ<1 meter over a 20-meter distance, the correction is small enough to be ignored in most practical surveying applications.
This threshold ensures that the error introduced by ignoring the correction is within acceptable limits for standard fieldwork.
If ℎ<1 meter over a 20-meter distance, the correction is small enough to be ignored in most practical surveying applications.
This threshold ensures that the error introduced by ignoring the correction is within acceptable limits for standard fieldwork.
Raju said:
1 decade ago
h square = 40.
Square root of 40 = 6.32 or 6.33.
How get it 3.3?
Square root of 40 = 6.32 or 6.33.
How get it 3.3?
Kawal jee v said:
10 years ago
@Vijay.
How it comes 3.3? Explain your answer.
How it comes 3.3? Explain your answer.
Rahul verman said:
10 years ago
How it will come 3.3?
Abhilash jana said:
1 decade ago
When distances are measured along the slope, the equivalent horizontal distance may be determined by applying a slope correction.
The vertical slope angle of the length measured must be measured. (Refer to the figure on the other side).
Thus, For gentle slopes, m<20%.
Ch = h^2/2l.
For steep slopes, 20% <= m <= 30%.
Ch = h^2/2l+h^4/8l^3.
For very steep slopes, m>30%.
Ch = l(1-cos0).
The vertical slope angle of the length measured must be measured. (Refer to the figure on the other side).
Thus, For gentle slopes, m<20%.
Ch = h^2/2l.
For steep slopes, 20% <= m <= 30%.
Ch = h^2/2l+h^4/8l^3.
For very steep slopes, m>30%.
Ch = l(1-cos0).
Chandradeep said:
1 decade ago
For slopes greater than 5% the above formula must be adopted otherwise the second part of the formula can be neglected.
Since the first three options are less than or equal to 5% they can neglected as the 3m is greater than 5% the second part of formula must included. Hence the answer is (D) 3m.
Since the first three options are less than or equal to 5% they can neglected as the 3m is greater than 5% the second part of formula must included. Hence the answer is (D) 3m.
Suparna said:
1 decade ago
If h2 = 4O. Then h = 6.324.
How it will come 3.3? Please explain.
How it will come 3.3? Please explain.
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