I'm studying our of Goswami's All-in-One Civil Engineering PE Breadth and Depth book and I'm having a problem following one of the soil compaction examples. You are given the below failure data for a saturated cohesionless soil.
Pore water pressure: 12.0psi
Verticle Total Stress: 36.5psi
Horizontal Total Stress: 15.5psi
Q: Under undrained conditions, what is the effective friction angle?
The first part of the solution shows:
Verticle effective stress = 36.5 - 10 = 26.5psi
Horizontal effective stress = 15.5 - 10 = 5.5psi
Where does this 10psi come from?
Any help would be great, this stuff is rather new to me.
Thanks.
Pore water pressure: 12.0psi
Verticle Total Stress: 36.5psi
Horizontal Total Stress: 15.5psi
Q: Under undrained conditions, what is the effective friction angle?
The first part of the solution shows:
Verticle effective stress = 36.5 - 10 = 26.5psi
Horizontal effective stress = 15.5 - 10 = 5.5psi
Where does this 10psi come from?
Any help would be great, this stuff is rather new to me.
Thanks.