My question have two points.
1. What is the method that ORD uses to determine the amount of excavation in a tunnel?
I tried several methods, but dont works. The next picture show the problem
2. The template was generate with a circles (tunnel template) but the cross section show segments, how modify that?
Regards
1. You can create a shape of the external shape of the tunnel with no child so that is will generate the volume of the tunnel. Keep it as Do Not Construct.
2. It is the way it is done actually. You can only change the number of segments to model the arc using variable CIVIL_CIRCLE_MESH_STROKE_NUMBERBy default set to 16 so 4 faces/5 vertices per quarter
Civil Variables (bentley.com)
In fact, the modeled components in ORD and ORLD are native closed mesh, they are not modeled as native solids. In the case of pipes modeled using pipe layout order, sited in Drainage and utilities workflow, we obtain solids.
Sorry Jean Pierre the previous answer went to Dante.