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Create a dynamic subgrade (see link below) for exisitng conditions and another for proposed (you have this already) and then compute the volume of these two. The stripped EG and the proposed subgrade.
John Mayo
Also have a look at this as it seems to be pretty similar to what you've described.
http://forums.autodesk.com/t5/autocad-civil-3d-general/large-paving-area/m-p/5307883#M259118
Don Ireland
Engineering Design Technician
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neilyj (No connection with Autodesk other than using the products in the real world)
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AEC Collection 2024 UKIE (mainly Civil 3D UKIE and IW)
Win 11 Pro x64, 1Tb Primary SSD, 1Tb Secondary SSD
64Gb RAM Intel(R) Xeon(R) W-11855M CPU @ 3.2GHz
NVIDIA RTX A5000 16Gb, Dual 27" Monitor, Dell Inspiron 7760
I really like this technique but the upfront overhead makes me wonder. If you want it for sections and profiles great but to go to that effort for net earth work calcs? If you have the area polygons you have the volume of the subgrade and your done: increase the fg vs eg cut value for the net earth work. I've been showing this picture for years, and now we can do it in civil3d. thats great, but a lot of work. See (-F)=(C) therefore everything below fg increases cut regardless.
Joe Bouza
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Yes it is a lot of upfront work and Civil should be able to compute this with ease (another package that I use has no difficulty with this sort of calc).
Whilst your method work for the total net cut/fill, more often than not I need to know the location of the cut and fill in order to devise an earthworks strategy (e.g, mass haul) and identify constraints in moving muck from the cut area to the fill area.
neilyj (No connection with Autodesk other than using the products in the real world)
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AEC Collection 2024 UKIE (mainly Civil 3D UKIE and IW)
Win 11 Pro x64, 1Tb Primary SSD, 1Tb Secondary SSD
64Gb RAM Intel(R) Xeon(R) W-11855M CPU @ 3.2GHz
NVIDIA RTX A5000 16Gb, Dual 27" Monitor, Dell Inspiron 7760
Opps
Wrong link.... Neil posted the correct link.
Here's the front page for the AU class.
John Mayo
I said net Earth work. if you need individual number (why) then maybe you need to do that, but if your goal is to get a net impor or export to the site it is irrelivant.
Joe Bouza
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