soil mechanics

[Dado23625]

A text book mentioned that 'the static pore water pressure equals to zero in conventional triaxial test', while in my opinion as there exists water in the pore, the static pore water pressure (u=γ·h) obviously happens during the test. Can anyone explain this for me?

By the way, how can we give a uniform 'cell pressure' to the soil sample in a triaxial test when the liquid in the cell has liquid pressure(u=γ·h) which is in direct proportion to the depth?

 

[CarlB]

I believe the pore pressure being referred to is actually "excess" pore pressure, which is the amount above pressure due to gravity. So by zero pore pressure they actually mean hydrostatic.

 

[Dado23625]

Thanks for CarlB's answer! To make the question clear, the original text is posted below.