AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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Distinguished Contributor
SeattleCADD
Posts: 188
Registered: ‎02-27-2009
Message 1 of 5 (264 Views)

Volume of Fill

264 Views, 4 Replies
01-07-2013 01:02 PM

Hello!

 

Could some one please help me with this:

 

I have an existing survey surface, and I want to know how much cubic yard of materials to fill up from the bottom to elevation 876. See attached image for detail. Here is what i am going to do and please correct me if my way is right way to do or not:

 

- i will create a surface of the fill area (from bottom cotours up to el 876) then do a volume surface bwt existing ground surface and the new fill area surface to get the volume of it? Is this a right way to do?

 

Thanks and Regards.

*Expert Elite*
neilyj
Posts: 3,989
Registered: ‎08-01-2008
Message 2 of 5 (256 Views)

Re: Volume of Fill

01-07-2013 01:21 PM in reply to: SeattleCADD

If the finished surface is all at 876 then extract the 876 contour and use that as a breakline/boundary in a new surface then volume surface with EG as base and 876 surface as comparison.

 

OR

 

draw a rectangle at 876, create a surface from it and use this as the comparison surface (possible easier as no triangles to trim out on concave areas)

 

OR

 

You could also draw a rough pline around the 876 contour and run reportsurfboundedvolume with the pline as the boundary and specify a datum of 876.

 

Incidentally at the top left of the screendump the contours appear to drop down to around 873.5 in which case this will be calculated with a vertical "cookie cut edge" which may or may not affect the volume greatly

neilyj
(No connection with Autodesk other than using the products in the real world)


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Distinguished Contributor
SeattleCADD
Posts: 188
Registered: ‎02-27-2009
Message 3 of 5 (248 Views)

Re: Volume of Fill

01-07-2013 01:39 PM in reply to: neilyj

Please patience with me as i am a new in C3D.

 

"draw a rectangle at 876, create a surface from it and use this as the comparison surface (possible easier as no triangles to trim out on concave areas)"

 

You meant: draw a rough pline around 876, create a surface from this contour line and do a volume surface with EG as base and surface 876 as comparation? i am not understanding? Keep in mind that i want to know the volume of fill material FROM THE BOTTOM OF THE EG surface (el 873) UP TO EL 876?

 

Please help!

Distinguished Contributor
SeattleCADD
Posts: 188
Registered: ‎02-27-2009
Message 4 of 5 (226 Views)

Re: Volume of Fill

01-07-2013 02:51 PM in reply to: SeattleCADD

Please see attached for better understanding my question. Thanks,

Valued Mentor
ericcollins6932
Posts: 334
Registered: ‎05-13-2010
Message 5 of 5 (202 Views)

Re: Volume of Fill

01-07-2013 06:35 PM in reply to: SeattleCADD

Yup - I would do the second option.

 

Draw a feature line, elevation = 876 around your area of interest but slightly larger.

Create a surface

Select the featureline, right click and add to surface as breakline.

Analyze/Volumes, selecting your EG as the base and your 876 elevation surface as the compare. Ignore any cut values.

 

Eric Collins, P.Tech.(Eng.)

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