Civil 3D - Surface with Overhangs

[Ziegren]

Hello, just want to know if its possible to make surface with overhangs on civil 3d? I have tried creating surface using survey points and 3D faces from 3rd party app but I can't produce the desired surface and cross-section. Attached is a photo(3Dfaces from 3rd party app) of what i want to produce.

[BIGAL]

Overhangs on civil 3d ? No idea what you want

[Ziegren]

Attached is an example, the one on the left side is the actual cross section and the one on the left side is what the civil 3D produced. We do have enough survry data. Any idea on how i can produce the one on the left side? Thank you.

 

Edited September 21, 2018 by Ziegren

[Ziegren]

Here is an actual sample, i have attached a dwg file and a photo of the site. I hope this u can help me. Thank you.

Sample.dwg

[CyberAngel]

As far as I know, it's not possible to have a negative slope in a surface. I'm sure that you can't have a zero slope, i.e. a vertical wall, because when you do slope calculations, you end up dividing by zero.

 

If the goal is just to do 3D modeling, you might be able to create the face horizontally and rotate it so that it's vertical. It wouldn't be a Civil 3D surface, however.

[rkmcswain]

See also, this related thread.

[Ziegren]

Thank you. I'll try what you guys suggest.

[Aftertouch]

I'd go for a pointcloud in this case.

[BIGAL]

Rotating 90 via a suitable axis will work  also as previously mentioned once TIN is made should be ok as the cross section is cut from the 3dfaces in an order.