You can try and experiment with the various options in File->Import Folders as Projects, specifically the option Import Folders as to see if you get what you are looking for but I doubt you will get exactly what you are looking for.
One way to achieve your goal would be to import the projects and then once that is done create the other entities (either folders or Albums) once and then paste them into each project.
The only way to truly automate this would be to write an Applescript and unless this is an ongoing requirement by the time you developed the script you could have just created the structure and pasted into the projects.
Thank you Frank,
your suggestion to "<...>experiment with the various options in File->Import Folders as Projects<...>" at first made me suspicious - is there are anything to experiment with .... and voilá changin default value of field Import folders As -> Folders as projects to Projects and Albums made my imported pictures landing in a way exactly I need.
Thank you very much. You made my day
Glad it help, thanks for the star.
One of the best ways to learn any system, hardware, software or anything in between is to play with it. But to be comfortable playing with something like Aperture you need to have a robust backup plan in place. Once you know no matter what you do you can always back out you'll be surprised how fast you can pick things up.