AutoCAD Civil 3D General Discussion

AutoCAD Civil 3D General Discussion

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jon_b
Posts: 28
Registered: ‎02-04-2013
Message 1 of 7 (7,701 Views)
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Subassemblies at different slopes targeting each other

7701 Views, 6 Replies
11-15-2013 04:14 PM

I have a ditch and a road that need to follow separate profiles but be integrated with each other as a single corridor and the ditch's 3:1 slope needs to meet up with the road's 2% slope.  Is it possible to have the two subassembiles target each other without having to create a dummy surface or a feature line for targeting to?  Attached is a snapshot of the road and ditch configuration.

If you wanted to maintain the 3/1 ditch foreslope and the 2% shoulder slope, and allow the intersection point to move as the ditch profile changes then LinkSlopesBetweenPoints may be appropriate.  In this case the ditch width parameter would be zero.  Set a marked point at the edge of the lane then attach the sub to the inside edge of your ditch.

 

Steve
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Jay_B
Posts: 2,732
Registered: ‎09-15-2010
Message 2 of 7 (7,690 Views)

Re: Subassemblies at different slopes targeting each other

11-15-2013 04:43 PM in reply to: jon_b
Daylight Basin and Daylight Basin2 support profile or feature line targets and could be attached to to the edge of road / shoulder.
Then the extra Assembly marker wouldn't be needed as it would all be tied together in one single corridor. Look at the help for these 2 subassemblies.
Jay

C3D 2014 SP2
Win 7 Professional 64 Bit
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jon_b
Posts: 28
Registered: ‎02-04-2013
Message 3 of 7 (7,675 Views)

Re: Subassemblies at different slopes targeting each other

11-15-2013 05:27 PM in reply to: Jay_B

My ditch will be at a grade of ~0.15% with periodic drop structures at 10% to correct for changes in elevation, while the road is to be a minimum of ~1.2m above original ground, wouldn't the DaylightBasin subassembly adjust its horizontal location to meet the elevation target and introduce jogs?

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Jay_B
Posts: 2,732
Registered: ‎09-15-2010
Message 4 of 7 (7,661 Views)

Re: Subassemblies at different slopes targeting each other

11-15-2013 05:59 PM in reply to: jon_b
If I'm understanding, yes the toe of the ditch would move in and out from the edge of road due to the variation in ditch grade but I thought you were asking for a 3:1 slope, not a variable one. If you do use the DaylightBasin, it helps to specify a very small number for the depth when controlling ditch depth with a target. Otherwise some portions of sub won't tie etc. depending on the terrain.
Jay

C3D 2014 SP2
Win 7 Professional 64 Bit
*Expert Elite*
sboon
Posts: 2,226
Registered: ‎11-08-2005
Message 5 of 7 (7,612 Views)

Re: Subassemblies at different slopes targeting each other

11-15-2013 09:00 PM in reply to: jon_b

If you wanted to maintain the 3/1 ditch foreslope and the 2% shoulder slope, and allow the intersection point to move as the ditch profile changes then LinkSlopesBetweenPoints may be appropriate.  In this case the ditch width parameter would be zero.  Set a marked point at the edge of the lane then attach the sub to the inside edge of your ditch.

 

Steve
Please use the Accept as Solution or Kudo buttons when appropriate

Active Contributor
jon_b
Posts: 28
Registered: ‎02-04-2013
Message 6 of 7 (7,547 Views)

Re: Subassemblies at different slopes targeting each other

11-18-2013 09:10 AM in reply to: sboon

Jay, I need to maintain the 3:1 slope for the ditch and 2% for the road.

 

Steve, that sounds like what I'm looking for. Will try it out this afternoon.

Active Contributor
jon_b
Posts: 28
Registered: ‎02-04-2013
Message 7 of 7 (7,530 Views)

Re: Subassemblies at different slopes targeting each other

11-18-2013 03:47 PM in reply to: jon_b

LinkSlopesBetweenPoints solved my problem, and a bit of searching led to a descriptive post and sample drawing on AUGI's forum.

 

http://forums.augi.com/showthread.php?131725-Help-with-assembly-problem

 

Thanks Steve, much appreciated!

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