Anyone know how to do a volume calculation for site cut/fill?

[WhistlerBuilder]

Hello Chiefers,

Does anyone know how to do a volume calculation for cut/fill areas on a site plan? I have a large multi lot site that needs some roads built and certain areas cut/filled to achieve flat lots. I am looking to do some basic rough volume calculations on how much I need to move in different areas. My original idea was to try and copy then convert the terrain perimeter into a 3D solid somehow, then use negative polygons to subtract the converted terrain shape from the proposed cut/fills I want to make. I cant figure out a way to do this currently, but I am willing to bet that there are plenty of people around here that are better at chief than me. Maybe someone has a suggestion for me?

Looking forward to hearing from anyone on suggestions for this.

Cheers, 

[SHCanada2]

integrate with slices

https://math.libretexts.org/Courses/Monroe_Community_College/MTH_211_Calculus_II/Chapter_6%3A_Applications_of_Integration/6.2%3A_Determining_Volumes_by_Slicing

 

...jk

 

 

might also be able to put a psolid across the entire terrain and then set its top to be the top of the terrain, with a thickness of whatever will be enough for your cuts.

 

and then model your terrain with the cuts, and then make another psolid, and then use the psolid tools to subtract (might have to cut the bottom to be horizontal). Havent tried it, but might be worth a shot.

 

I'm doing a very sloped lot right now and might try it in the next couple days. I have the undisturbed, current conditions terrain in another .plan file

 

[robdyck]