Design profile editing

[Anonymous]

I have an 8km long alignment and profile was designed using (mostly) floating straights and curves.  I now need to change a floating straight to a floating curve somewhere in the middle of the alignment.  Is there a way to do this without deleting the last 4km of my profile and re-doing everything?  With alignments, there is a way to change parameter and tangency constraints but I don't think there is for profiles?

[Jeew-m]

Hi,

You can do this by profile geometry editor.

First add a PVI at the middle of the straight you need a curve.

Then move the PVI up or down by the amount you need for the curve.

Then go to more vertical curve--> Free vertical parabola.

You can create a similar curve as floating curve.

Thanks

[Anonymous]

Thank you Jeewana.  I however wanted to replace the floating straight with a floating curve.  I should have explained too that the profile is mainly made up of floating elements and I want to edit the middle section of the profile.  But the only way to do that (as far as I know) is to delete the floating components from the end back to the section I want to edit.  

Horizontal alignments have the option to change tangency constraints between fixed, floating and free so you can easily delete/edit anywhere along the alignment but profiles do not have this option. I'm using C3D 2018 and don't think 2019 and 2020 can do this either(?).

[Anonymous]

morning,

you are talking about a vertical alignment.  and Jeewana is correct.

Add a vertices to your vertical alignment, and then using the node grips move the new point up/down to the pvi location.  Using the vertical alignment editor you can change the slope in and out of the pvi, then add a free floating vertical curve of any length.

Select your vertical alignment, right click your mouse, select Edit Profile Geometry.

Add a new vertices where needed, select vertical curve - free floating.

And you are set to update / add labels.

good luck,

nonbeard13

[Anonymous]

Thanks Nonbeard but like I said, my elements are all floating so I can't add a PVI. 

[Jeew-m]

Ah... I always go with parabolic curves with free vertical parabola. They are easy to edit.

However in your case I have little suggestion.

Create a ASCII file for your profile. Refer links as guidance.

Link 1

Link 2

The use import from file option to create the profile.

So you will get the same profile without floating options where you can add/edit PVI in the middle of tangents.

Thanks