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CPT interpretations <br /> U Wt. Unit Weight of sod determined from <br /> 1) uniform value or <br /> 2) value assigned to each SBT zone <br /> 3) user supplied unit weight profile <br /> TStress Total vertical overburden stress at mid layer depth <br /> 7Stress y jx, <br /> where n is layer unit weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth I Mtress=T3tress-Ueq <br /> Ueq Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT Neo overburden correction factor Cn=(.W5 <br /> where o, is in tsf <br /> NOD SPT N value at 60%energy calculated from Qt/N ratios assigned to 05<C„<20 3 <br /> each SBT zone <br /> (NI)eo SPT Neo value corrected for overburden pressure I N16o=Cn •N6o 3 <br /> A(N1)eo Equivalent Clean Sand Correction to(Nt)eo K <br /> sir <br /> Where Kspr is defined as <br /> 0 0 for FC<5% <br /> 0 0167•(FC-5) for 5%<FC<35% <br /> 05 for FC>35% <br /> FC-Fines Content in% <br /> (Nt)eo,, I Equivalent Clean Sand(N1)so I (N1)sD.=(N1)eo + A(N1)eo I 7 <br /> Su i Undrained shear strength-Nkt is use selectable S�-Qr_6, 2 <br /> Nrr <br /> k Coefficient of permeability(assigned to each SBT zone) i 6 <br /> Bq Pore pressure parameter I Au 2 <br /> Bq= <br /> Qr-a,. <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined by I <br /> Qr-Q q <br /> Robertson, 19W Qt'_ <br /> Qv <br /> Rfn Normalized Rf for Soil Behavior Type classification as defined by f5 4 <br /> Robertson, 1990 Rfn=I00%• <br /> Qr-�v <br /> SBTn- Normalized Sod Behavior Type(slightly modified from that published by - q <br /> Robertson, 1990 This version includes all the soil zones of the original <br /> non-normalized SBT chart-see figure 1) <br /> Qci Normalized Qt for seismic analysis n s 5 <br /> qct =qc.(Palsy) <br /> where Pa=atm pressure <br /> Qci N Dimensionless Normalized Qtl qct N=qcl/Pa <br /> where Pa=atm pressure <br /> EGG <br />