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CPT Interpretalbons <br /> po <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 /> TStress y,h. <br />' where is layer unit weight <br /> A is layer thickness <br />' `re-" I Effectwe vertical overburden stress at mid layer depth I EStress=Mtress—Ueq <br /> Ueq I Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br />' Cn SPT Nso overburden correction factor <br /> where a„'vs in W <br /> 05<C„<20 <br />' Nso SPT N value at 60%energy calculated from Qt/N ratios assigned to 3 <br /> each SBT zone <br /> (N1)ao f SPT N60 value corrected for overburden pressure I Meo=Cn•Nw 3 <br /> e(N1)sG I Equivalent Clean Sand Correction to(N1)60 Ksrr 7 <br /> s� <br />' Where lspT 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 /> (N1)aom Equivalent Clean Sand(N1)so I (N1)8ocs=(N1)w + a(N1)eo I 7 <br />' Su Undrained shear strength-Nkt is use selectable Qr—dY J 2 <br /> Su= <br /> Ark <br /> k f Coefficient of permeability(assigned to each SST zone) 4 6 <br /> Bq I Pore pressure parameter Du I 2 <br /> IJ Bq~Qr—¢v <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined by Qt—a 4 <br /> Robertson, 1990 Qin- <br /> or v <br /> Rfn Normalized Rf for Sod Behavior Type classification as defined by f 4 <br /> Robertson 1990 I Rfn—100%• <br /> SBTn Normalized Soil Behavior Type(slightly modified from that published by 4 <br /> Robertson, 1990 This version includes all the soil zones of the onginal <br /> non-normalized SBT chart-see figure 1) <br /> Qct Normalized Qt for seismic analysis qct =qc.(Pala.)o 5 5 <br /> where Pa=atm pressure <br /> Qci N Dimensionless Normalized Qt1 qct N=qc1 1 Pa <br /> where Pa=atm pressure <br /> IEGG <br />