Sorry if this seems quite a straightforward question to do, but I am very new to Rhino and I couldn’t find any workaround on the internet for my problem.
I am trying to create a 3D model of a complex soil stratigraphy like the one below. The goal is to use Rhino to create the NURBS surfaces of the top layers and export to a 3D FEM software like PLAXIS 3D to create the volumes ( see e.g https://communities.bentley.com/products/geotech-analysis/w/plaxis-soilvision-wiki/45906/converting-triangulated-surfaces-in-a-cad-software-for-efficient-modelling-in-plaxis-3d)
As you can see from the picture above, some soil layers will intercalate and intersect to each other at some point. In some case these NURBS surfaces will intersect and convergence in some region
My question is: how can I optimize the NURBS surface so they can perfectly align in the intersected area? This is important to avoid any small gaps/opening that can cause intersect or numerical issues?
I have upload an example of the surfaces here:
Any help is more than welcome at this stage