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Corridor Modeling Issue

8 REPLIES 8
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Message 1 of 9
scohen
147 Views, 8 Replies

Corridor Modeling Issue

Hi All,

I was wondering if there is a way to resolve the following issue (see image) with my corridor. As can be seen in the image, the daylight lines are modeling into each other around a tight curve.

Thanks in advance.

-Seth
8 REPLIES 8
Message 2 of 9
Anonymous
in reply to: scohen

I don't have C3D available at the moment to verify this, but a wild thought I had on how to avoid this is to ensure you have multiple regions for the curb return alignment and within the logical naming, perhaps you DON'T daylight through the region that is creating the intersecting daylight slopes. For this to work, you would have to ensure your start and end stations are specific to the locations where the crossing start.

Again I am guessing at this since I cannot verify, but I am thinking you may have a way to indicate how regions daylight inn addition to how regions project to horizontal and vertical controls.

If this doesn't work, you could also clean in up in the exported surface.
Message 3 of 9
Anonymous
in reply to: scohen

Danny - First, thanks for your response. I am an intermediate Civil 3D user
and I was wondering if you wouldn't mind elaborating a little further with a
workflow for what you are suggesting. I have been doing civil design with
Bentley's InRoads for about 15 years and I know that in InRoads, to avoid
this issue, it is literally a toggle in the Roadway Design tool to fix it
(in InRoads it is called PI rounding). I assumed that Civil 3D had the
same type of toggle.

Thanks again!
-Seth

wrote in message
news:4985578@discussion.autodesk.com...
I don't have C3D available at the moment to verify this, but a wild thought
I had on how to avoid this is to ensure you have multiple regions for the
curb return alignment and within the logical naming, perhaps you DON'T
daylight through the region that is creating the intersecting daylight
slopes. For this to work, you would have to ensure your start and end
stations are specific to the locations where the crossing start.

Again I am guessing at this since I cannot verify, but I am thinking you may
have a way to indicate how regions daylight inn addition to how regions
project to horizontal and vertical controls.

If this doesn't work, you could also clean in up in the exported surface.
Message 4 of 9
Anonymous
in reply to: scohen

I will get back to you later on today on this and elaborate once I can verify what I was saying in my first post.
Message 5 of 9
scohen
in reply to: scohen

That's awesome, I really appreciate it (especially on a weekend :-).

BTW, I found the region option and I am playing around with it now as well
as trying the surface option.

Thanks so much
-Seth

wrote in message
news:4985681@discussion.autodesk.com...
I will get back to you later on today on this and elaborate once I can
verify what I was saying in my first post.
Message 6 of 9
Anonymous
in reply to: scohen

Seth,

I did verify that the targetDTM within the logical naming does add an entry or two each time you add a region. It works just like the alignments and profiles in the logical naming in this case. That is a good sign so you should be able to do what we are discussing her. As it is the weekend, I don't have the time to play with it now, but provided you are able to control the stationing of the region for the area where there are crossings, when that "TargetDTM" entry is added to the logical naming, you want to ensure it is NOT daylighting to the existing ground surface, you can do this by clicking on the Object Name column and making sure the TargetDTM is set to None
Message 7 of 9
scohen
in reply to: scohen

Danny,

Thanks again for all your help. I tried what you said, and it did work, but
how do I now get an accurate proposed surface, volumes, contours, etc.
through these areas (see attached image)?

Is my best bet to export the corridor to a surface and try surface
manipulation? I haven't really tried editing a surface yet, but I'll try
this route tonight and let you know how I make out (are we sure there isn't
just a simple toggle :-).

Thanks Danny!

-Seth

wrote in message
news:4985758@discussion.autodesk.com...
Seth,

I did verify that the targetDTM within the logical naming does add an entry
or two each time you add a region. It works just like the alignments and
profiles in the logical naming in this case. That is a good sign so you
should be able to do what we are discussing her. As it is the weekend, I
don't have the time to play with it now, but provided you are able to
control the stationing of the region for the area where there are crossings,
when that "TargetDTM" entry is added to the logical naming, you want to
ensure it is NOT daylighting to the existing ground surface, you can do this
by clicking on the Object Name column and making sure the TargetDTM is set
to None
Message 8 of 9
Anonymous
in reply to: scohen

Volumes are never completely accurate as I am sure you know. Although there is a small gap, the surface will TIN across the gap for volumes. In the corridor properties, surface tab, you can export a Top Surface and Datum Surface (for volumes). You will most likely have trouble with the corridor boundaries because of the Gap, and if you cannot get the boundaries to work, you can clean up the TIN of the exported surface. The TIN editing works pretty well

I haven't found a simple toggle for this.
Message 9 of 9
scohen
in reply to: scohen

Ok Danny, thanks for all the info.

Again, ALL your help with this issue is greatly appreciated!

-Seth

wrote in message
news:4985839@discussion.autodesk.com...
Volumes are never completely accurate as I am sure you know. Although there
is a small gap, the surface will TIN across the gap for volumes. In the
corridor properties, surface tab, you can export a Top Surface and Datum
Surface (for volumes). You will most likely have trouble with the corridor
boundaries because of the Gap, and if you cannot get the boundaries to work,
you can clean up the TIN of the exported surface. The TIN editing works
pretty well

I haven't found a simple toggle for this.

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