C3D Combining surface problem

[Anonymous]

Hello,

I pasted platform surfaces on the natural ground to have the surface of my project, the problem is that my new surface (project) was created with defects on the edges of the platforms (I think that it tries to make up the difference in level between the platforms), the attached photos defines the problem
thank you for helping me solve the problem

@BushW has edited your subject line for clarity: pasted surface defect

[Jeew-m · Accepted solution]

Dear Friend,

I think you can extract the boundary of your proposed surface as a 3D polyline and add it to the pasted surface as a standard breakline. 

However before that make sure you pasted proposed ground on to existing ground. That means the pasted surface comes to top even its level is below the other surface. You should select existing surface and paste proposed surface to it. 

Thanks

[cwr-pae · Accepted solution]

If you pasted one of the two surfaces into the other I recommend removing the pasted surface. any gradings that reference or target the existing grade will be corrupted by adding the new surface to the existing. Create a new surface and paste the two surfaces to into it. Make sure the existing surface is 1st, either by pasting existing then pasting new in separate operations or pasting both at once then call up surface properties and setting the order on the definition tab, remember the second surface's data overwrites the first surface's data.

If you used some form of grading to the existing surface you can extract the resulting feature line and add it to the 3rd surface as a breakline as @Jeew-m recommends.

[Anonymous]

I tried but it does not work, I even tried to create two features lines supperposed for different platforms but it doesn't work

[BushW]

Hello @Anonymous

I was wondering if you could post your drawing for review so, the community may be able to help you solve this problem. Thanks

Wendell

[Anonymous]

the project is attached, thank you for your interaction, and I hope we find a solution

[Mike.M.Carlson · Accepted solution]

Hi there-

@cwr-pae and @Jeew-m have solid tips.  I would like to propose an option as well in addition to theirs.

1. Extract the TIN boundaries from each platform surface like @Jeew-m suggested.  
2. I would then offset these 3D polylines by 1ft out
3. Next I would create a new composite proposed surface that pastes in the existing ground surface
4. Then I would add the Step 2 offset 3D polys as Non-Destructive breaklines to this surface (step 3)...this steps creates additional TIN points and triangle edges that line up along these offsets, while maintaining the original existing ground surface exactly.. 
5. Finally I would paste in each platform surface into the composite proposed Surface created in Step 3.

The resulting composite surface will have little 1foot wide transition zones around each pasted platform surface that absorbs the variances between existing ground surface and the platform surfaces.  Everything within the platform surface will exactly match the original platform TINs, while all Existing Ground TIN data outside the 1ft offsets will match original.  The 1foot zone will have all the variance.

I hope this helps.

[Jeew-m]

Maron is exactly correct. The problem here is a basic Civil 3D theory. Civil 3D cannot have two elevations at same point. Since you have surfaces overlap at several edges the extracted boundaries will overlap too. So they will not be added as breaklines to the surface. So you need a make a tiny little offset at these edges to make them separate. That's what Maron has described.

[kubastan89]

I would use this method:

1) Make a copy of existing ground surface

2) Extract project surface boundary using LINEWORKSHRINKWRAP command

3) Add Hide Type Boundary to the copy of existing ground surface using project surface boundary

4) Create finish ground surface

5) Paste to the FG surface copy of EG and project surface 

This always works for me.

[BushW]

Hello @Anonymous

I'm just checking in to see if you need more help with this. Did the reply of @Mike.M.Carlson provided work for you?

Please hit the ‘Accept as Solution’ button if/when relevant so, that others can more easily benefit from the information and thank you for doing so. 

Best Regards,

Wendell

[Anonymous · Accepted solution]

hello 
Thanks for your interaction, i share withe you the correct solution, that I found in the french forum;I joint the link if you want to see :
Solution :

• Bonding different plateforms surfaces in a existing surface
• Addition of the bondries of plateforms as wall Breakline Type with height 0.2 to 0.4 and cleaning the sides.

https://forums.autodesk.com/t5/autocad-civil-3d-et-infraworks/defaut-de-surface-collee/m-p/7575203#M...

[BushW]

Hello @Anonymous

I am very glad to hear that you were able to find a solution! If you ever have any problems in the future, I'll be here, and I'm happy to help.

Best Regards,

Wendell