The top width of an embankment is 2 m. Side slopes on both the sides are 2:1. Level of the top surface of this bank is at 250 m. NSL at 30m interval are given below. Calculate earth work by Mean Area Metho

 

Q#:The top width of an embankment is 2 m. Side slopes on both the sides are 2:1. Level of the top surface of this bank is at 250 m. NSL at 30m interval are given below. Calculate earth work by Mean Area Method.

 

Station	0	30	60	90	120	150
N.S.L	248.15	248.50	249.25	248.75	248.15	247.75

 

Solution#

 

 

Station no.	Depth	Bd	Sd²	A(m²)	Mean area (m²)	interval	Q(m³)
	1.65	3.7	6.845	10.545	--	--
	1.5	3	4.5	7.5	9.02	30	270.6
	0.75	1.5	1.125	2.655	5.06	30	151.8
	1.25	2.5	3.125	5.125	4.125	30	123.75
	1.65	3.7	6.845	10.545	8.08	30	242.4
	2.25	4.5	10.125	14.625	12.585	30	377.55