Hi all, What parameters are required to be altered to change the dynamic settlement in a soft soil model?

Greetings to whoever reading this, I'm modeling construction of a pre-loading embankment on soft soil, to be improved by pre-loading and PVD's, to get the ultimate consolidation settlement and the time needed for it under the effect of the embankment…

In plaxis, Even if the soil is clayey type ( with dominant cohesion ), it is modelled as soft soil with phi value instead of cohesion.. What is the reason behind this, please share your valuable response. Thank you.