Phi Angle Weathered Rock (Piedmont)
Phi Angle Weathered Rock (Piedmont)
(OP)
I am searching for any referance material
for estimating shear strength parameters
for piedmont residual soils (silt/micaceous silts/weathered rock)??
Anyone know of good ref. material sources?
for estimating shear strength parameters
for piedmont residual soils (silt/micaceous silts/weathered rock)??
Anyone know of good ref. material sources?





RE: Phi Angle Weathered Rock (Piedmont)
I'm at a loss as how to define shear strength parameters
from weathered Piedmont (Eastern US)sampled generall as sand (50 - 100+) blows per foot.
RE: Phi Angle Weathered Rock (Piedmont)
RE: Phi Angle Weathered Rock (Piedmont)
25-38+ degrees
silts 26-35
micaceous silts 24-33
PWR 36-38+
but keep in mind the erratic nature (both horizontally and vertically) of the piedmont. run multiple tests on the specific soils to confirm.
RE: Phi Angle Weathered Rock (Piedmont)
RE: Phi Angle Weathered Rock (Piedmont)
RE: Phi Angle Weathered Rock (Piedmont)
treated as an Intermediate Geomaterial (IGM).
My take on this is that PWR should be treated as a
cohesionless IGM; since my experience indicates little fines in PWR.
That being the case; the manual presents
a method for calculating phi' - but does not give an upper bound for such materials other than to say not to use
N>100bpf in the equation.
This give phi' as high as 57 degrees in some instances. I have a site where PWR is signicant to depth and am interested in determining skin friction values; which will depend on selection of phi'. Anyone have upper bound idea of phi' in PWR?????
38+ leaves a lot on the table........