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Earthwork Volume Calculations
ByDarrell R. Dean Jr., P.S., Ph.D.
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Topical Outline
• Area calculations– Special Conditions
• Level Section - trapezoid• 3-Level Section - triangles
– Coordinate Method - emphasis on this method– Other methods - electronic or manual
• Planimeter• Digitizer
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Topical Outline Cont.
• Volume formulas– Average end method– Prismodial Method– Transition Sections– Borrow pit method
• Volumes from topo maps: ave. end method– stock piles– reservoirs
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Area Calculation
Slope Stake Notes Section Specs
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Coordinate Axis Setup
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Coordinate Axis Setup
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Application of Vol. FormulasSlope Stake Notes
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Application cont.
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Application cont.
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Application cont.
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Application cont.
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Application cont.
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Borrow Pit Method
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Volumes from Topo Maps• Application:
– Stockpiles– Reservoirs
• Utilize Average End Volume formula– Area is area inside a
contour– Length is the contour
interval
• Accumulate subvolumes