Creating Surface when one corridor passes beneath another

Are there any special settings I need to use in this instance? I am working on an interchange where the bridge crosses the interstate. There is a loop ramp that starts at the end of the bridge, then loops around and passes underneath the bridge, parallel with the interstate. I keep getting weird things happening with the bridge, even when I just create the surface from the bridge corridor.

In the picture below, you can see how the tin gets messed up just as the bridge passes over the ramp below, even though I havent included the ramp in the surface.

Thanks

  • Zach,
    I‘d like to look at this in more detail.  You have me interested now.  Are you available for a GOTO meeting sometime?
     
     
    Vern Danforth, P.E.                                         Florida Department of Transportation
    CADD Applications Support                                                  Engineering / CADD Systems Office
    Phone no: (850) 414-4897                                                   605 Suwannee Street, Mail Station 69
    Toll Free no: (866) 374-3368 extension 4897                  Tallahassee, Florida  32399-0450
     
    How am I doing?  Please contact my supervisor, with any feedback.
    Supervisor: MailTo:Jimmie.Prow@dot.state.fl.us
     
    From: zbillin30 [mailto:bounce-zbillin30@communities.bentley.com]
    Sent: Monday, August 11, 2014 12:03 PM
    To: FDOTCADDSupportGEOPAKCorridorModeling@communities.bentley.com
    Subject: [FDOT CADD Support - GEOPAK - Corridor Modeling] Creating Surface when one corridor passes beneath another
     
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    Are there any special settings I need to use in this instance? I am working on an interchange where the bridge crosses the interstate. There is a loop ramp that starts at the end of the bridge, then loops around and passes underneath the bridge, parallel with the interstate. I keep getting weird things happening with the bridge, even when I just create the surface from the bridge corridor.

    In the picture below, you can see how the tin gets messed up just as the bridge passes over the ramp below, even though I havent included the ramp in the surface.

    Thanks

    Vern

  • It  is hard to tell without seeing the rotated view; but  it appears that you triangulated to the surface of the road below.  Either try to clean all of those triangles up or use a DNC
    (do not contour) where the ramp is.  Although you will still have a triangle going to other places on the surface. Example see how the triangles are going to  the median!
    Also it appears they are triangulating to the retaining wall, or piers.
     
    Peggy   
     
    From: Vern Danforth [mailto:bounce-Vern_Danforth@communities.bentley.com]
    Sent: Monday, August 11, 2014 12:34 PM
    To: FDOTCADDSupportGEOPAKCorridorModeling@communities.bentley.com
    Subject: RE: [FDOT CADD Support - GEOPAK - Corridor Modeling] Creating Surface when one corridor passes beneath another
     
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    Zach,
    I‘d like to look at this in more detail.  You have me interested now.  Are you available for a GOTO meeting sometime?
     
     
    Vern Danforth, P.E.                                         Florida Department of Transportation
    CADD Applications Support                                                  Engineering / CADD Systems Office
    Phone no: (850) 414-4897                                                   605 Suwannee Street, Mail Station 69
    Toll Free no: (866) 374-3368 extension 4897                  Tallahassee, Florida  32399-0450
     
    How am I doing?  Please contact my supervisor, with any feedback.
     
    [collapse]
    From: zbillin30 [mailto:bounce-zbillin30@communities.bentley.com]
    Sent: Monday, August 11, 2014 12:03 PM
    To: FDOTCADDSupportGEOPAKCorridorModeling@communities.bentley.com
    Subject: [FDOT CADD Support - GEOPAK - Corridor Modeling] Creating Surface when one corridor passes beneath another
     
    View and reply online
    Replying to this email posts your reply in the thread.

     

    Are there any special settings I need to use in this instance? I am working on an interchange where the bridge crosses the interstate. There is a loop ramp that starts at the end of the bridge, then loops around and passes underneath the bridge, parallel with the interstate. I keep getting weird things happening with the bridge, even when I just create the surface from the bridge corridor.

    In the picture below, you can see how the tin gets messed up just as the bridge passes over the ramp below, even though I havent included the ramp in the surface.

    Thanks

    [/collapse]
  • Vern and I came up with a solution. I had one corridor that consisted of my mainline roadway and the bridge. I switched to the bridge with my bridge template drop and then back to the roadway with the roadway template drop.

    The change we made was making the bridge its own separate corridor. I copied my Mainline corridor and named it Bridge. This preserved all the settings of my original corridor for the new one. I then put a Blank template in where the Bridge was on original corridor. On the new Bridge corridor, I removed everything but the Bridge template drop and changed the corridor limits to just those of the bridge limits.

    This fixed the issue. I dont believe there is any way to have one surface above another surface when creating a tin.

    Zachary Billings, P.E.

    Senior Roadway Engineer (Licensed in FL and MI)

    CONSOR Engineers, LLC

    System Info:

    Windows 11 | Intel Core i7-13700k | Nvidia RTX 4090 FE | 32 GB of RAM | 2 TB Western Digital Black SN850x NVME

    ORD Version 10.12.02.004 | FDOT Connect Version 10.12.01.00

    YouTube Page for ORD: https://tinyurl.com/BillingsCADD

    Answer Verified By: Zachary Billings