Adding Retaining walls to a surface

[carlitosjr23]

Hi Everyone, 

I am pulling my hair out with this issue I am having...

I need to do a cut/fill analysis not residential site and this site has like 6 retaining walls there is a 6 foot difference in grade.

My surface is not recognizing the grade change when I make the polyline into a wall breakline. 

I know I am doing something wrong here but I just cannot figure it out. Please help thank you

[palabalo]

Do you think you could send me the files also?

I will message you with my e-mail.

[csevers]

Adding walls to surface from grading objects.

I have a surface I've built from grading objects. It's referenced all over the place and has labels, etc., dynamically linked to it. I'd like to add a retaining wall to my design without creating a new surface. Can someone please exaplin the workflow they would use to create a retaining wall as indicated on the attached figure? 

[Joe-Bouza]

I close the fl so when I infill I don't get contours up the wall. No masking required.

[csevers]

I don't quite follow. The slope in that area was created from grade to surface grading criteria. How would you go about "closing the featureline"? If the surface was created from an infill of feature lines, I would understand.

[Joe-Bouza]

Now that the elevation at the base of the wall is know and the range along you base FL. I would divide the grading ito 3 parts

1. grade to surface @ slope and stop at the RW geometry
2. grade @ slope @ dist to the RW Geometry
3.Grade to surfac...

If you wall is paralell to the FL easy. If not you have to finesse the transition

[Joe-Bouza]

This technique was suggested for infill grading with FL not in the middle of a projection.

[csevers]

In other words, the easiest way is to redo the projection?

[Joe-Bouza]

Yup

[Joe-Bouza]

But that should not be a big deal

[AutodeskBTB]

Hi jmayo,

I am in the process of creating a sloping platform(s) and will be needing to model retaining walls as you explain below, if you could email me that NCs template to cgould@cybermoor.org.uk that would be a great help.

Best

Colin

[Joe-Bouza]

that template is shipped with the product in some support folder

C:\Users\<user name>\AppData\Local\Autodesk\C3D 2014\enu\Template

most likely similar path for each version

[piermattei]

This issue has not been resolved. Breaking the surface into parts is really a non-starter and a waste of time

[Joe-Bouza]

@piermattei this thread is 3-5 years old and I didn't recognize your handle in the original thread. Please give me a little more context to what your issue is.

[piermattei]

Here are my basic steps...that I seem to repeat over and over again (On every job)

1. Create a Excavation using the Grading tool. Grade from a feature line to a surface 

2. Add a Retaining Wall to the grading, try to do this using the following steps (however this almost always fails)

A. Add a top and bottom feature line (top of wall & bottom of wall) on the same site, this results in incorrect grading Surface.

B. Use Breakline on the feature line, this helps but grading is still incorrect 

C. Swap edges (almost every edge), Time consuming, usually does not work.

Scrap all of this (except step 1)....Break surface into parts.. this works.... until client changes grading requirements, start back at step 1. May skip steps 2, since it rarely works.

Rinse...repeat forever. 

[piermattei]

For those, who read this...it helps to add lots of elevation vertices to the wall feature lines. Doing this I have had more success

Thx

[piermattei]

It also appear that the order that you add the feature lines and the order in which you create the breaklines has a huge effect on the results. Since there is no manual on this....good luck. Creating the bottom of wall breakline first seems to be the best bet.

[Joe-Bouza]

A picture may help.

From the description of your workflow it sounds like something is off.

When you grade from a feature line to a surface and then add a retaining wall are you saying you add a feature line inside the projection? Not sure how that would ever work. 

The daylight point from the top of wall, I would think would be vastly different then the daylight point of the projection from a FL to a surface.

Assuming a cut condition; use the surface from the grading as a temp and extract the bw eleavation (FL in a different site). Then set the top, then add a daylight grading from top. Now the first projection can be trashed. move the base FL to the new site and infill the rest

[piermattei]

Yes, that is basically the steps I take to create a custom surface and yes it work. It is not quick and there are too many steps to update, if something changes, such as the grading requirements or the original feature line moves. It is not dynamic at all. 

Yes I was implying a feature line inside of the cut. and yes it does work. Just not all the time and not very good. 

Thanks, for the help

[Strata-CAD]

Allen

would greatly appreciate checking out that file you shared... (Email:  randall@strata-design.com)

many thanks, Randy

[AllenJessup]

@Strata-CAD I believe you're asking for the file @jmayo-EE offered to share. I don't have it.