Buried Of concrete covers??

estimated

A piping of 3000 mm to diameter and this one buried 5000 mm, but is it in a booth of concrete that covers it in all your length and diameter, the conditions of buried shall be to indicate in agreement to the characteristics of the concrete one or of the soil?

Let me try to figure out what you are saying.

You have a 3000 mm diameter pipe, encased in concrete, with 5000 mm of cover. You need to know what parameters to use for the underground modeler. Is this correct?

correct, in this case, my soil shal bee a concrete with this characteristics