TOPIC 3 : MASS HAUL DIAGRAM

DIFINITION AND IMPORTANT PHRASES

Bulking An increase in volume of earthwork after excavation

Shrinkage A decrease in volume earthwork after deposition and compaction

Haul distance (d) The distance from the working face of the excavation to the tipping point

Average haul distance (D) The distance from the centre of gravity of the cutting to that of the filling

Free haul Distance The distance, given in the Bill of Quantities, included in the price of excavation per cubic metre

Overhaul Distance The extra distance of transport of earthwork volumes beyond the free haul distance

Haul The sum of the product of each load by its haul distance. This must equal the total volume of excavation multiplied by the average haul distance, i.e vd = VD

Overhaul The product of volumes by their respective overhaul distance. Excess payment will depend upon overhaul.

Station Metre A unit of overhaul 1m3 x 100m

Borrow The volume of material brought into a section due to a deficiency

Waste The volume of material taken from a section due to excess

Mass haul diagram with balance line

Chainage Vol. of Cut (+)

Vol. of Fill (-)

Shrinkage 5%

Total Vol. m3

0 0 0 0

100 400 20 -420

200 450 22.5 -892.5

300 600 0 -292.5

400 110 0 -182.5

500 410 0 227.5

600 670 33.5 -476

700 920 46 -1442

800 1200 60 -2702

900 1000 50 -3752

a. Calculate the total volume with Shrinkage 5%.b. Plot the graph

Chainage Vol. of Cut (+)

Vol. of Fill (-)

Correction of Vol

Total Vol. m3

0 0 0

100 65000 39000 39000

200 17000 10200 49200

300 21000 12600 61800

400 24000 14400 76200

500 16000 9600 85800

600 20000 0 65800

700 30000 0 35800

800 17000 0 18800

900 22000 13200 32000

a. If the soil type is clay.Calculate the total volume with Shrinkage 0.6.

b. Plot the graph