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Adding Retaining walls to a surface

39 REPLIES 39
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Message 1 of 40
carlitosjr23
18639 Views, 39 Replies

Adding Retaining walls to a surface

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

39 REPLIES 39
Message 2 of 40
ccoles
in reply to: carlitosjr23

To more accurately show a wall in a suface, I need two breaklines, One for the top of the wall grade, and one for the bottom of the wall grade. I typically use a 0.5' offset to separate the breaklines. A single polyline cannot do the job.

 

Or am I missing something...

Windows 7 64-bit
Dell Precision T5610, Dual-Xeon 2.6Ghz, 16 Gig RAM
Civil 3D 2013
Message 3 of 40
carlitosjr23
in reply to: ccoles

Thanks for the response, I have been using one line and drawing 2 breaklines off that one line.

 

Ok do I connect the polylines in anyway?

Message 4 of 40
ccoles
in reply to: carlitosjr23

I typically don't connect them. Here's a sample of a recent wall in a surface we used on a project. Note the separation of the top and bottom breaklines. The black section between them is 15 vertical feet of contours stacked nearly on top of each other.Wall-Sample.jpg

Windows 7 64-bit
Dell Precision T5610, Dual-Xeon 2.6Ghz, 16 Gig RAM
Civil 3D 2013
Message 5 of 40
jmayo-EE
in reply to: carlitosjr23

See attached for an example of a feature line retaining wall. The offset used here is computed from the block's batter angle for the maximum wall height. On larger walls you will want to account for batter in tight designs.

John Mayo

EESignature

Message 6 of 40
coolblues
in reply to: carlitosjr23

hi fellas! newbie question here. lets say I have my two feature lines one for top of wall and the other as bottom of wall that has an elevation assigned to each vertices, how do I add it up to my surface? As a standard or wall? Do I have to create a separate surface for my walls and have to paste it to my proposed surface so that it will reflect correctly on my surface? thanks in advance!

Message 7 of 40
mathewkol
in reply to: carlitosjr23

Add them as standard. The only time you define wall breaklines is when you have either the top or bottom wall line and you know the vertical distance at each vertex.
Matt Kolberg
SolidCAD Professional Services
http://www.solidcad.ca /
Message 8 of 40
AllenJessup
in reply to: coolblues

I usually don't include the actual wall in the proposed surface. I have a Featureline for the groundline at the back of the wall and one for in front of the wall. Then I mask the area of the wall. I don't show contours going through the wall. If I want the wall in a surface to show in 3D then I paste it in to a proposed surface.

 

BTW. You'll want a Featureline for the back top of the wall also. You can create that by offsetting the top front.



Allen Jessup
Engineering Specialist / CAD Manager

Message 9 of 40
jmayo-EE
in reply to: ccoles

A designer should note and determine if they need to compute what the wall width will be in plan view. This will of course depend on materials and the wall's batter but a 6' high boulder wall could have a plan view width of 4-5' if you are using 3' diameter stone. A Keystone wall could have a 2-3' plan view width. This width may be very important if you are placing the wall close to building setbacks, property lines, structures or designing a serpentine driveway with limited distance between the parallel runs of the driveway. If the wall is placed on a property line and the wall has batter the designer should make sure that the embedded portion wall is not going to be on the neighbors lot. 

John Mayo

EESignature

Message 10 of 40
ccoles
in reply to: jmayo-EE

I still use two feature lines separated by a small number, like 0.125', to depict the front face of the wall. For wall width, if significant like johnm's example, I'd take the top feature line and offset it by the wall width to show the top of the wall. I do this with curb lines all the time, and only do this with walls of top widths of 5-10' wide, like gabion walls and such.

Windows 7 64-bit
Dell Precision T5610, Dual-Xeon 2.6Ghz, 16 Gig RAM
Civil 3D 2013
Message 11 of 40
AllenJessup
in reply to: jmayo-EE


@Anonymous wrote:

the designer should make sure that the embedded portion wall is not going to be on the neighbors lot. 


That's hanging over my head right now. I'm supposed to be completing acquisition maps. But the retaining walls haven't been designed yet. So what we'll need to include the footings is just a guess at this point.

It's good you brought these issues up. I was just addressing the use of Featurelines in wall design and surface creation. There's always much more to the story!

 

Allen Jessup



Allen Jessup
Engineering Specialist / CAD Manager

Message 12 of 40
jmayo-EE
in reply to: AllenJessup

HTH. This of course will not matter if the wall is not constrained by surrounding stuctures or parcel boundaries.

 

Here's a nice example of feature line retaining walls built into the surface for the OP. There are 4 or 5 here. It shows the top inside walll face as CColes discussed.

John Mayo

EESignature

Message 13 of 40
Joe-Bouza
in reply to: jmayo-EE

Wow! They're re-grading the Partenon Smiley Wink

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People)

HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram


Note: Its all Resistentialism, so keep calm and carry on

64 Bit Win10 OS
Message 14 of 40
jmayo-EE
in reply to: Joe-Bouza

Well now we all now know your not Greek... or an architect 🙂

 

That was for a lake front log cabin addition. 😮

John Mayo

EESignature

Message 15 of 40
hra1981
in reply to: AllenJessup

Hi

Plaese if it is possible,could you please share the DWG file of this example?

I appreciate you in advance,because it is very useful for me

Sincerely

Message 16 of 40
jmayo-EE
in reply to: AllenJessup

Sorry I took so long to respond. I was away for a few days.

 

I had to remove data from this file and place the basics for these walls into the NCS template.

 

There are two methods to building walls here.

 

Wall 1 - Feature lines extracted from a corridor. I like the profile control and profile superimposition to to display the wall with this method. I use this most when the contractor bids by wall face area and when a profile is needed to spec anchoring and/or grid systems.

 

Wall 2. Drafted Feature Lines - Draw them as you need in plan. Assign elevations and add the feature lines to a surface. I use this most often for smaller (<6') boulder walls and landscape walls.

 

These same methods can be used to construct many other things like curbs, buildings, ponds, swales, etc.

 

The 2.6 MB file is too large to post here. 😞

Send me an email and I will deliver. Sorry I don't do dropbox or stuff like that.

johnm       at     conklinassociiates        dot          com

John Mayo

EESignature

Message 17 of 40
hra1981
in reply to: jmayo-EE

Dear Johnm
Plaese if it is possible for you send me the dwg file that is so useful for
me.
I appreciate you in advance.
Sincerely
Hamid
Message 18 of 40
hra1981
in reply to: AllenJessup

Hi Allen

My email address is Hra1981@gmail.com.

I appreciate you in advance.

Sincerely

Hamid

Message 19 of 40
jmayo-EE
in reply to: hra1981

I sent the file. Did you receive it?

John Mayo

EESignature

Message 20 of 40
hra1981
in reply to: jmayo-EE

Hi
I didn't recieve that.
Sincerely
Hamid

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