AutoCAD Civil 3D

[#1]

would this work:

1. create a grading from Existing top of slope at 4: for an arbtrary distance.

2. create a FL from you desing profile add a horizontal grading to intersect grading 1.

3. now you can target grading 2 daylight point and continue from there

[#2]

Hey Troma,

I think you and I are on the same page.  I have a 3d polyline on the top of my existing berm at elevation so yes in deed, the left anchor point is targeting that and it shows up correctly in my cross sections.  But my problem still is getting the other end (right side) of my sub-assembly to target that profile elevation.  I can't fugure out how to tell the sub assembly to do that.  So, because of that, the right side of the sub-assembly just targest the centerline at the design profile elevation.

[#3]

Joe,

I understand what you are saying here.  It will creat and intersection point that meanders around.  I understand what your saying but actually doing it is another thing.  I have not worked a whole lot with grading objects.  How ould you do this?

[#4]

You're right.

You could do it starting with the Subassembly.LinkSlopeAndVerticalDeflection coming up from the existing toe on the left, targeting his pipe cover profile.

[#5]

Taneum, my point is you can't use the top of berm as a target!

You must put an alignment and profile on the top of berm, and use it as the start point for the assembly.  Then all the subassemblies are to the right.  Read over my last post again.

[#6]

I think we are all on target with this design, but if the "design grade" is above the pipe and a 4:1 elevation target is on the right side of the "design grade" then the cover requirement is being violated. No?

Not to criticize the design but if cover is this tricky on a 4:1 then IMHO the pipe alignment should be moved further from the edge of embankment

[#7]

It sounds to me like troma basically has the right idea.

You want to start building from the featureline that you've already drawn along the top of the existing berm, but this is probably a meandering line that wouldn't be very suitable for a baseline alignment and profile.  None of your sections would be parallel and the corridor would be messy to work with.  I would suggest that you use the pipeline as your horizontal alignment and have two profiles for it.  One is the pipeline invert, used only for the corridor baseline.  The other one is the controlling elevation for your red dot.

Starting from your baseline point add a generic LinkOffsetAndElevation which will be targeted both horizontally and vertically to your featureline on the top of existing berm.  From there you can use LinkSlopeToElevation to the top of your new berm with a target tied to the upper profile you've built.  From there you can add lane subs to create a finished top of the new berm or you can just use DaylightGeneral to finish the whole thing in one step.

[#8]

"How about a LinkSlopeToElevation link instead?"

No, looking back at the thread now, Lisa had it first!

[#9]

I was looking at this again and thinking that it would be better to have the corridor following the berm.  I think that it will make it easier for building sections, and for survey layout later.

What I did was to build an alignment and baseline profile at the crown of the berm.  My assembly uses LinkOffsetOnSurface (with the hide link option turned on) to place marked points at the two daylights.  I then used LinkSlopeBetweenPoints to create the top and side of the berm.  This workflow alllows for a different way to control the berm size and shape but produces pretty much the same result.

[#10]

Nice.

This is a greatly helpful demonstration of some creative techniques working together (hide link, LinkSlope BetweenPoints clean up).

The only thing about this option for this scenario, is that I think he wants his berm's top left edge pushed over at 4:1 up to the pipe cover profile elevations, and then created 12' wide, crowned 2% symmetrically.