The ground levels taken for a
road project are as under
Chainage in Meter
|
0
|
30
|
60
|
90
|
120
|
150
|
180
|
Ground level in Meter
|
366.30
|
367.20
|
368.10
|
368.50
|
369.70
|
369.00
|
368.60
|
The foundation level of a road
at starting chainage is 370.00 m. The road surface shall be given a following
gradient of 1 in 60 formation width of road is 10 m side slopes 1 in 2 in
embankment and 1 ½ : 1 in cutting. There is no cross slope to the ground. Find out
the quantities of earth work in embankment and in cutting in appropriate form.
Solution :
Cross Section of banking -
Cross Section of cutting –
ESTIMATE
FOR EARTH WORK B = 10m.
|
||||||||
Calculation of Quantities B = 10, S = 2 for
banking and 1 ½ for cutting
|
||||||||
Chainage
|
Height or Depth Diff. of GL. & FL.
|
Mean height or depth d in m.
|
Central area
B x d
M2
|
Area of sides Sd2
M2
|
Total Sec. area BD+Sd2
M2
|
Distance Between Two Stations
L m
|
Qty. of earth work
(Bd – Sd2) x L
|
|
Banking m
|
Cutting m
|
|||||||
0
|
3.50
|
-
|
-
|
-
|
-
|
-
|
-
|
-
|
30
|
2.30
|
2.90
|
29.00
|
16.82
|
45.82
|
30
|
1374.60
|
-
|
60
|
0.90
|
1.60
|
16.00
|
5.12
|
21.12
|
30
|
633.00
|
-
|
90
|
0.00
|
0.45
|
4.50
|
0.41
|
4.91
|
30
|
147.30
|
-
|
120
|
-1.70
|
0.85
|
8.50
|
1.10
|
9.60
|
30
|
-
|
288.00
|
150
|
-1.50
|
1.60
|
16.00
|
3.84
|
19.84
|
30
|
-
|
595.20
|
180
|
-1.60
|
1.55
|
15.50
|
3.60
|
19.10
|
30
|
-
|
573.00
|
( - Sign indicates cutting ) Bd+Sd Total
|
2155.50 Cu.m.
|
1456.20 Cu.m.
|
||||||
