topic 3 mass haul diagram
Post on 23-Oct-2015
62 Views
Preview:
DESCRIPTION
TRANSCRIPT
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
top related