Is there an official Plaxis reference or literature reference supporting the use of non zero cohesion and tensile strength (eg 1 kPa), to improve numerical calculation?

Hello everyone I wonder about the meaning of the Maccel value. I checked the Plaxis 2D reference manual and it says "The value of this parameter is always 0." Why it's always zero and what does it do? Thank you

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…