Hey
I have a big hole in the ground in my model. Its easy to get the volume of cut with C3D. But I have a topsoil layer, weathered rock layer and then solid rock, I basically need to break them down into different volumes. The way I would normally do it is calculate the topsoil, then work out the weathered rock and minus the topsoil, then for solid rock cut I minus the topsoil+weathered rock. Is there a better dynamic way of doing this? I have attached the 3 volumes I need for info
does each layer have a constant datum?
Joe Bouza
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neilyj (No connection with Autodesk other than using the products in the real world)
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Thats where I was heading with one twist. If the datums are constants you can tweak the FG build elevation and one volume surface could be used for the three quantities.
Joe Bouza
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neilyj (No connection with Autodesk other than using the products in the real world)
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Duh...
Run an alignment through it, sample lines , sections compute materials! ( no extra surfaces required)
Dang I hate when I only think vertically
Joe Bouza
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neilyj (No connection with Autodesk other than using the products in the real world)
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If it is a quarry or open pit then the sectionsmethod is suitable. True, it may generate some kind of minimum error, however the sections are generated automatically and give you the chance to give strictlytrack to the mining and monitors the floor levels.
I have compared the results of the calculated volumes between two triangulated surfaces using sections and other programs as Terramodel, Surpac, Surfer, etc.. The results are very similar.
If the baseline for the sections is dragged and the sections run at 90 degrees to the original line this will give a good check on the volumes - only in a quarry/open pit situation, no good for roads etc
neilyj (No connection with Autodesk other than using the products in the real world)
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Hi,
I am a beginner in AutoCAD Civil 3d. I went to the fiels with a Total Station and got near 150 points from a small basalt open-pit abandoned mine. I need the following help from you guys: 1) I realized that all the points are 180 degrees rotated around nadir. System coordinates: UTM, datum: SAD 69. Fuse: 22S. How to rotate all the points?; 2) I must calculate the volume extracted from the open-pit mine. What is the method to calculate it in AutoCAD Civil 3D?
Thanks in advance,
Nelson.
Nelson,
For the volume question:
You will need to have 2 surfaces, one for the existing condition of the pit and another one for the original condition or Existing Ground. This can be complicated, you may not have that information.
Once you have the two surfaces, go to Analyze and Volumes Dashboard, create a new volume surface, name, and select Base surface and Comparision surface.
This is a Youtube link you will find very useful: https://www.youtube.com/watch?v=Ya5yJ_-phIM
If you don't have the original terrain condition, you will have to guess and create one...
Hope this helps.
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