Adding retaining walls

[Baghera]

Here's the problem.


I've got a really tight ROW for a road.
Need to keep a 3:1 slope away from road.
Want to place a retaining wall at ROW to meet slope (which varies in height according to grade of course)

How do I get LDD 2k5 to say " OK the slope went past the ROW here so let's throw in a Ret. Wall. until it's back inside the ROW"???

[Phil Ferguson]

Here's the problem.


I've got a really tight ROW for a road.
Need to keep a 3:1 slope away from road.
Want to place a retaining wall at ROW to meet slope (which varies in height according to grade of course)

How do I get LDD 2k5 to say " OK the slope went past the ROW here so let's throw in a Ret. Wall. until it's back inside the ROW"???
First thing that popped into my mind, was a grading object. I've only been playing with them for a short time, but they're pretty slick.
If you were to import the daylight line from your cross-sections (if that's how you're doing it)...you could see where your slope is extending beyond the ROW. Create a polyline inside your ROW to represent the wall. You can assign elevations from the proposed surface for the top of the wall and tell it to "slope" to the existing surface...be careful not to use a vertical face, try something like a .01:1 slope or something like that. You can then export breaklines to the proposed surface.

Just a thought...

[MHultgren]

If you use a proximity fault to begin with, you can change it to a wall fault after you have it located as far as the limits go.

[Baghera]

If you use a proximity fault to begin with, you can change it to a wall fault after you have it located as far as the limits go.
How would one go about this?

[MHultgren]

Open Terrain Modeller, the open your surface and in the list is Breaklines. Right-click and select Add Wall Breaklines. You will need to know the Elevation Difference or Actual elevation on either side of your wall. The Draw Proximity Breakline option will let you draw a PLINE that you can use to re-triangulate your surface with before you create the wall fault. I would draw both sides of the wall using the proximity Breakline so the surface actually changes at each face and transitions "through" the wall. Make sure you have the "Apply Edit History toggled ON before you do this. You can get to this by right-clicking on the Surface name and selecting Properties.

[Baghera]

Looking into your method Mark, Thanks for the help. In the meantime here's a little clarification.

The walls are going to be made out of gabions and I was wondering if they could be set up as a subassembly or something so that a) I don't have to draw them in and b) My volumes come out right.

I'm thinking they can't be subassemblies because then they would run the full length of the alignment, and that the wall hight will vary, or am I wrong in that. (I hope I am, It would make life a lot easier)

See attached dwg for what I currently have vs what I'm looking for (gabions drawn in by hand)

Also as you can see my ROW isn't an offset from the CL of road

[MHultgren]

You can set them up as a sub assembly and process your sections with separate templates where needed. IOW, copy your base template, add the Gabion subassemby and change the name so you know it has the Gabions included and then when you process your sections, when prompted for the stationing, process one segment with your base template and then the next section (where the Gabions will be) with your new template, and when it changes back, process that range with the base template and so on throughout your alignment. Not quite as easy as using Inroads Decision Tables, but close.