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Earthwork Analysis: Average End Area Method, Shrinkage Considerations, Balance Line, Freehaul & Profitable Haul Limits

Learn about earthwork analysis techniques such as the Average End Area Method, considerations for shrinkage, balance line considerations, and limits of freehaul and profitable haul. Explore special terms like free haul distance, limit of profitable haul, overhaul, borrow, and waste. Develop a mass diagram to calculate borrow, waste, and overhaul in all loops, and identify stations where these occur.

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Earthwork Analysis: Average End Area Method, Shrinkage Considerations, Balance Line, Freehaul & Profitable Haul Limits

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  1. CE 453 Lesson 23 Courtesy of Dr. David Carlson, Agronomy at Iowa State University

  2. Earthwork Analysis • Average End Area Method • Consideration for shrinkage • Balance line Considerations • Limit of Freehaul (LFD) • Limit of Profitable Haul (LFH)

  3. CUT FILL

  4. Special Terms • Free haul distance (FHD)- distance earth is moved without additional compensation • Limit of Profitable Haul (LPH) - distance beyond which it is more economical to borrow or waste than to haul from the project • Overhaul – volume of material (Y) moved X Stations beyond Freehaul, measured in sta – yd3, or sta-m3 • Borrow – material purchased outside of project • Waste – excavated material not used in project

  5. Mass Diagram Development • 1) Place FHD and LPH distances in all large loops • 2) Place other Balance lines to minimize cost of movement (theoretical) • 3) Calculate borrow, waste, and overhaul in all loops • 4) Identify stations where each of the above occur

  6. Second, Larger Example

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