AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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Active Member
riaangroen
Posts: 8
Registered: ‎10-04-2012
Message 1 of 8 (2,221 Views)

Corridor - Right angle corner / Bowtie

2221 Views, 7 Replies
10-12-2012 01:13 AM

Hi

I have a Corridor issue - does anyone know how to fix the inside / outside corners of right angle corridor?

 

Im doing a embankment lift and the client wants the corners neatly and not curved or champers.

We often get a problem like, so help would be very nice! Also the outside corner should not curve. I can do it with gradings or futurelines, but if there is a design change i have to redo everything.

 

See the assembly - this is only the first lift.

 

Thanks

Riaan

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dgordon
Posts: 1,472
Registered: ‎12-14-2006
Message 2 of 8 (2,157 Views)

Re: Corridor - Right angle corner / Bowtie

10-12-2012 01:35 PM in reply to: riaangroen

feature lines is the best way to do it atm, sorry it's not more dynamic.

 

 

Dan

Civil 3D 2013
Win 7 Pro x64
Intel Xeon 2.0GHz
12Gb Ram
ATI Firepro 4800
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sboon
Posts: 2,112
Registered: ‎11-08-2005
Message 3 of 8 (2,118 Views)

Re: Corridor - Right angle corner / Bowtie

10-13-2012 09:51 AM in reply to: riaangroen

Assuming that your alignment is at the inside of the berm the solution here is to add a very small radius curve at the corner, then add a single corridor section at the midpoint of that curve.  You will have to use the corridor section view/editor to adjust the assembly parameters for this new section.

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Joe-Bouza
Posts: 4,884
Registered: ‎12-15-2008
Message 4 of 8 (2,097 Views)

Re: Corridor - Right angle corner / Bowtie

10-13-2012 02:34 PM in reply to: riaangroen

riaangroen wrote:

Hi

I have a Corridor issue - does anyone know how to fix the inside / outside corners of right angle corridor?

 

Im doing a embankment lift and the client wants the corners neatly and not curved or champers.

We often get a problem like, so help would be very nice! Also the outside corner should not curve. I can do it with gradings or futurelines, but if there is a design change i have to redo everything.

 

See the assembly - this is only the first lift.

 

Thanks

Riaan


So what kind of corner do you want?

Thank you

Joseph D. Bouza, P.E. (one of 'THOSE' People) Civil 3D 2012 & 2013
HP Z210 Workstation
Intel Xeon CPU E31240 @ 3.30 Hz
12 GB Ram


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

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Distinguished Mentor
andrewpuller3811
Posts: 770
Registered: ‎07-30-2008
Message 5 of 8 (2,078 Views)

Re: Corridor - Right angle corner / Bowtie

10-14-2012 01:18 AM in reply to: riaangroen

I think Riann wants the corners to be sharp corners with no chamfers or roundings.

 

 

As steve said, a very small arc with a frequency station at the centre.

 

Here is a step by step post

 

http://andrewscivil3dstuff.blogspot.com.au/2011/06/create-corridor-with-90-degree-bend.html

 

 

If this fixed your issue, click on "Accept as Solution"

Andrew Puller
Maitland, NSW, Australia
Windows 7 Enterprise 64bit
Intel core i7 2600 @ 3.40 GHz with 16GB Ram
Civil 3d 2013 64bit
Active Member
riaangroen
Posts: 8
Registered: ‎10-04-2012
Message 6 of 8 (2,045 Views)

Re: Corridor - Right angle corner / Bowtie

10-14-2012 06:50 PM in reply to: andrewpuller3811

hi Andrew

thanks for the blog - iv tried that before but does not quite work. It works well when the surface is close to the ground, but the higher you go, the more complicated it gets.

Iv attached two more pics, second try at the corridor.

The client wants a sharp outside / inside corner. I've tried the small radius, but as the lifts / raises progress, the bigger the arc gets on the outside.

The alignment starts fro the inside going outwards, I've also tried going from the outside going in, but then I end up with a bowtie effect.

 

This would be easier with offset polylines or gradings but there must be solution for this issue.

 

I still need to go up 10 lifts / raise, so the arc is going to be massive at the end.

 

Thanks

Riaan

 

Civil 3D

Intel(R) Xeon(R) CPU

X5675 @3.07GHz

64-bit

24GB RAM

Distinguished Mentor
andrewpuller3811
Posts: 770
Registered: ‎07-30-2008
Message 7 of 8 (2,038 Views)

Re: Corridor - Right angle corner / Bowtie

10-14-2012 07:40 PM in reply to: riaangroen

You will need to have an alignment to target for the outside that does not have an arc in it.

 

Offset your base alignment outward using the standard autocad offset command and then fillet the corner/s of the polyline with zero radius to remove the arcs. Create an alignment from polyline and use that as your outside target.

If this fixed your issue, click on "Accept as Solution"

Andrew Puller
Maitland, NSW, Australia
Windows 7 Enterprise 64bit
Intel core i7 2600 @ 3.40 GHz with 16GB Ram
Civil 3d 2013 64bit
*Expert Elite*
Neilw
Posts: 2,253
Registered: ‎09-04-2006
Message 8 of 8 (2,020 Views)

Re: Corridor - Right angle corner / Bowtie

10-15-2012 12:23 AM in reply to: riaangroen

You have encounted a fundamental weakness in Civil 3D: it cannot dynamically model projected mitered corners. You can't do it with with corridors, offset alignments or gradings. The best you can do is minimize the fillet or chamfer by getting as close as you can to the final solution with featurelines or alignments and using them as corridor targets or for gradings.

Neil Wilson (a.k.a. neilw)
Infrastructure Suite/C3D 2013, LDT 2004, Power Civil v8i SS1
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