AutoCAD Civil 3D Wishes

Valued Mentor
Posts: 1,089
Registered: ‎01-07-2011
Message 1 of 5 (194 Views)

Subgrade Volume Tab in Surface Proprties Dialog Box

194 Views, 4 Replies
08-20-2012 06:34 AM

I would like to see a Subgrade Volume Tab located after the Analysis Tab in the Surface Properties dialog box for true earthwork calculations for Civil site work.


It would consist of the following working from top to bottom:


1. A check box toggle to "Calculate Subgrade Volume".

    • If left unchecked the whole Tab would be grayed out.

2. A "Select Comparison Surface".

    • This would typically be EG (existing ground), or a stripped EG surface.

3. A box that looks like the Range Details box on the Analysis Tab.

    • It would have 4 columns, with the following headers:

    1. ID -Finish Material Name (user entry cell)

        •  i.e., Parking Lot A, Bldg Pad C, Topsoil Area B, etc.

    2. Depth of Finish Material or Depth to Subgrade (user entry cell)

    3. Area of Finish Material (calculated)

    4. Volume of Finish Material or Volume Above Subgrade (calculated)


4. It would have an ellipsis button at the end of each row (or possibly in the ID cell of each row) that would take the user into Model space for selection of the Polyline or Feature Line that defines the Area of the finish material.

      • The routine would just use the Area information, as the depth of material has been entered as above.
      • The routine would react dynamically to any edits to the entity defining the Area of finish material, if the user should need to adjust the areal extent of the finish material during design.

5. Cut/Fill Factor user entry box.


6. Read-only Statistics information box.


7. Check box toggle: to show small Panorama box in Model Space that displays a dynamic running tally of the subgrade earthwork volume so that the user can keep track of volume as they design and grade the Finished Ground (FG) surface.

Fred Ernst, PE
C3D 2015
Ernst Engineering
Valued Mentor
Posts: 1,089
Registered: ‎01-07-2011
Message 2 of 5 (182 Views)

Re: Subgrade Volume Tab in Surface Proprties Dialog Box

08-22-2012 05:59 AM in reply to: fcernst

Add to #4:


For ease of recognition and visibility of the subgrade areas for the designer:


  • The defined subgrade areas would become automatically hatched with a simple cross hatch or 45 degree hatch upon slection of the subgrade area defining Polyline or Feature Line. The color of the hatch could be chosen in each row of the Details Box. The hatch would update automatically if the defined subgrade area Polyline or Feature Line is edited/grip edited.


The total hatching for the Surface's subgrade defined areas would be all one entitiy, on a single layer, so that it may be easily hidden or turned off/frozen by the designer.


Fred Ernst, PE
C3D 2015
Ernst Engineering
*Expert Elite*
Posts: 2,519
Registered: ‎05-21-2008
Message 3 of 5 (175 Views)

Re: Subgrade Volume Tab in Surface Proprties Dialog Box

08-28-2012 05:45 AM in reply to: fcernst

What sort of data saved in the drawing and what sort of output do you envision?  I was thinking for each subgrade area defined, it should create a volume surface in the prospector.  Also, you mentioned a panorama.  This should be able to export to .xml, the same way the volume analysis panorama does now.

Credit where credit is due! Give kudos or accept as solution whenever you can.

Valued Mentor
Posts: 1,089
Registered: ‎01-07-2011
Message 4 of 5 (168 Views)

Re: Subgrade Volume Tab in Surface Proprties Dialog Box

08-30-2012 11:55 AM in reply to: troma

Yes, you could have the option to create one overall subgrade surface, or the option to have each of the top surface material areas have their own subgrade surface.


Yes, the typical Report and Output buttons would be located at the bottom of the Tab.


The little panorama would be just a lttle window the designer could move around that shows the overall subgrade cut/fill volumes dynamically reacting and updating as the designer makes changes to the FG surface.


*Instead of another Surface Properties tab, the Subgrade surface could live in Prospector at the hierarchal level of Masks, Watersheds and Definition under the FG surface.



Fred Ernst, PE
C3D 2015
Ernst Engineering
Distinguished Contributor
Posts: 151
Registered: ‎05-16-2008
Message 5 of 5 (147 Views)

Re: Subgrade Volume Tab in Surface Proprties Dialog Box

09-25-2012 05:46 AM in reply to: fcernst

Agreed.  We need something to extend the material and subgrade concept from corridors to the full site.  Allowing for true earthwork and true material volume calculations and graphics.

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