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Created Surfaces with grading now I have gaps

8 REPLIES 8
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Message 1 of 9
jamesbarnett
1728 Views, 8 Replies

Created Surfaces with grading now I have gaps

Guys,

I am trying to create a surface using the grading tool. I have a known top and a designed floor. I extended the floor surface out to meet the top breakline. I then use the grading tool to run a 3:1 down to the pond floor so I know where the true breakline is, but there is almost always a gap or two in my surface. It is usually less than a foot, but it has made my OCD kick in and I am going crazy trying to figure it out. I've traced of the breaklines, and the contours and addeded them to the surface to try and fix it, but that doesn't seem to work.

 

Any ideas?


AutoCAD Civil 3D 2022
8 REPLIES 8
Message 2 of 9
BrianHailey
in reply to: jamesbarnett

It's hard to tell from the description. Can you share an image or, even better, a sample file?

Brian J. Hailey, P.E.



GEI Consultants
My Civil 3D Blog

Message 3 of 9
jamesbarnett
in reply to: BrianHailey

Here is an image. Hope this helps in the explaination


AutoCAD Civil 3D 2022
Message 4 of 9
Neilw_05
in reply to: jamesbarnett

There is no obvious gap in your TIN surface in your screen capture. Are you seeing a gap when you view it with Object Viewer or in a 3D view?

Neil Wilson (a.k.a. neilw)
AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1
WIN 10 64 PRO

http://www.sec-landmgt.com
Message 5 of 9
jamesbarnett
in reply to: Neilw_05

The Southern most green line points to the gap which is only .25'.


AutoCAD Civil 3D 2022
Message 6 of 9
Joe-Bouza
in reply to: jamesbarnett

have you tried a show boundary?

are those triangle or GO projection lines? Have you examined the FL in the area of the gap?
Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People)

HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram


Note: Its all Resistentialism, so keep calm and carry on

64 Bit Win10 OS
Message 7 of 9
Neilw_05
in reply to: jamesbarnett

I see now what you are talking about. The black lines running down the slope is the surface boundary at the gap.

 

Without having your data it's hard to say what it is but a few things I would look for at that location are:

 

Elevation points, gaps in the grading (grading not applied to entire featureline), breaks in the featureline, any other anomalies that might influence the grading.

 

You might also try splitting the grading at that point, making a gap and adding a transition. Sometimes the software just has problems finding a solution.

 

Neil Wilson (a.k.a. neilw)
AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1
WIN 10 64 PRO

http://www.sec-landmgt.com
Message 8 of 9
jamesbarnett
in reply to: Neilw_05

I took your suggestion and broke the feature line, graded it and then did a transition. That seemed to fix that particular issue this time.

 

Thanks.


AutoCAD Civil 3D 2022
Message 9 of 9
Neilw_05
in reply to: jamesbarnett

Just an FYI, you didn't need to break the FL to make the transition. In other words, a transition can be added to a closed grading applied to a closed FL.

 

Anyway glad to know you found a solution.

Neil Wilson (a.k.a. neilw)
AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1
WIN 10 64 PRO

http://www.sec-landmgt.com

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