1O.EARTHWORK CALCULATION: 8 pts EXISTING GROUND ELEVATION AS SHOWN BELOW: a. Giv

Question

1O.EARTHWORK CALCULATION: 8 pts EXISTING GROUND ELEVATION AS SHOWN BELOW: a. Given Finish Pad Elevation = 179.00 What is the value changes in point B l cut or fill? (1.0 pts ) b. Given Finish Pad Elevation = 179.00. What is the value changes in point B 2., cut or fill? (1.0 pts ) c. Given Finish Pad Elevation = 179.00. do earthwork calculation, Borrow Pit Method, answer in co Cut volume? Fill volume? Total earthwork volume? Import or Export? 30' ID 178.3 170 5 79.0 180.2 i 10' 2+178.8- 179.2- 10' 180.1

Explanation / Answer

1) B1 elevation = 178.5 ft.

finishing pad elevation =179.00ft

as the elevation of the ground is below the finishing pad elevation fill is to be done.hence the required earth work for B1 is fill of 179.00 - 178.00 = 1.00 ft

2) given finsh pad elevation at B2 =179.00ft

elevation of the ground at B2 = 179.2 ft

as the elevation of the ground is above the finshing pad ground level cut has to be done of 179.2- 179.00=0.2 ft

depth

c) earth work calculations for finish pad elevation = 179.00 ft

volume of earth work by borrow pit method = area*avg.depth

avg depth = summation of depths at four corners/4

area = 10ft*10ft=100sft

avg depth fpr grid AB01=((179-177.5)+(179.0-178.0)+(179.0-178.3)+(179.0-178.5))/4

= (1.5+1.0+0.7+0.5)/4

=0.925ft(fill)

earth work calculation = area*avg.depth

=100*0.925

=92.5cu.ft

= 92.5/27 =3.426 cu.yards

if avg depth indicates negative sign it is cut portion.

likewise the earthwork calculations are done for remaining grid portion

total earth work volume = cut + fill volume

= 2.3147+6,389

= 8.7037 cu.yards

as the fill volume is more than the cut volume import is to be done

grid area (sf) average depth(ft) volume (cu.yards) cut volume(cu.yards) fill volume(cu.yards) AB01 10*10 =100 (1.5+1.0+0..7+0.5)/4=0.925 0.925*100/27=3.426 3.426 AB12 100 (0.7+0.5+0.2-0.2)/4=0.3 0.3*100/27 =1.111 1.111 BC01 100 (1.0+0..5+0.5+0)/4=0.5 0.5*100/27=1.852 1.852 BC12 100 (0.5+0-0.2-1.1)/4=-0.2 -0.2*100/27 =-0.7407 0.7407 CD01 100 (0.5+-1.0+0-1.2)/4=-0.425 0.425*100/27 1.574 total volume of cut and fill in cu.yards 2.3147 6.389

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