interaction soil - steel pile (IPE200 section profile)

Hi at everyone, i have some (more) problems with modelling of steel driven pile. (IPE200 in particular). 

It's really easy to see and think about this model, but when i go in plaxis i find more difficult.

1) I need to model one single steel pile with Ipe200 section, under static and progressive steps of horizontal loads
I have add the geometry, the soil and the embedded beam parameters. I have set the staged construction with steps load.

2) But in all this step, i can't set a parameter that simulate the interface about soil and smooth steel pile. 

3) I have easy condition, because dont have axial compressed force, so have only lateral resistence and no based resistence to set (it's right?)

I must model the interaction of the pile with soil (at vary of soils parameter under same loads), it's more easy and can't make it. I have test of this pile in local area, with results,   but i can' replicate that for this problem.

For set of embededd beam i have insert equivalent inertial section, fot Tmax set 1*10^12 kN/m2, and layer dependent.
I think that can control this inteface change Rinter only? (what is the vale can assign?) Any tips?