Staged excavation, staged construction ,abaqus 6.10, soil nailing wall, nail

Hello everyone,

I need to model soil nailing wall in abaqus based on staged construction.( first remove soil to expose the slope then active the nail and then apply shotcrete facing),

i guess its required to assemble; soil deposit(plain strain element)+nail (beam element)+ facing(beam element),

step 1; geostatic step

step 2; remove the soil to create slope

step 3; active nail ()

step 4; active facing

is that right?

any help would be greatly appreciated