Friday, February 16, 2018

Average Cut and Fill

I have no idea what the Average Cut and Average Fill of a volume surface means or how it should be calculated. It sounds like a made up term from a planner so they can come up with a made up value to judge impacts for a project. Since I don’t have a good explanation of what the average cut or fill is here is one way to do it in Civil 3D.

  1. Create the volume surface.
  2. Go into the Volume Surfaces, Analysis Tab. Change the type to Elevation, the number of Ranges to 2 and then press the down arrow to apply the 2 elevation ranges. image
    1. Change the Ranges to 0 for the Maximum Elevation for the first range and 0 for the minimum elevation for the second line. image
    2. Then create a Surface Legend table for the Elevation Analysis. image
    3. Now take the Cut Area and divide it by the volume of cut and the Fill Area and divide it by the volume of fill. Then you should have average cut/fill numbers. You can find the volume numbers in the volumes dashboard or on the Statistics tab. You can even add the volumes to the table.

    Now I have no idea if this is correct. I did end up with an average number that has the correct units. I can think of numerous other more complicated methods to calculate these values.

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