How is it possible to import 3D volume (which is not a corridor) from Civil3D to Revit with CivilConnection?
What are you after using this object for when you get it into revit?
If you just want to use it to coordinate with a bridge that is modelled in revit, then just export out that drawing with the navisworks exporter.
If you want this as a proper object, you may want to extract a load of points that have X, Y and Z values then use these to re-generate via toposolid in revit. Extracting that surface via landxml might be a avenue?
Workflow Civil - Revit - #24 by jacob.small use remember node of you need transger the solid. If you need to create topologi in revit based on surface in c3d follow this link "BriMohareb_XXXX" Package for RevitXXXX Thread - #30 by RMohareb