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CPT interpretations <br />' U Wt Unit Weight of soil determined from <br /> 1) uniform value or <br /> 2) value assigned to each SBT zone <br />' 3) user supplied unit we4ght profile <br /> TStress Total vertical overburden stress at mid layer depth TStress- y h <br />' where n is layer unit weight <br /> A is layer thickness <br /> I <br /> " <br /> tress Effective vertical overburden stress at mid layer depth ES"s- TStress---Ueq <br /> Ueq Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br />' Cn SPT N6o overburden correction factor Cn=(00-08 <br /> where avis in tsf <br /> f 1 05<Q„<20 <br /> N6 ISPT N value at 60%energy calculated from Qt/N ratios assigned to I 3 <br /> each SBT zone <br /> (N1)BO SPT Neo value corrected for overburden pressure N1w=Cn a N6 3 <br /> IA(N1)OO Equivalent Clean Sand Correction to(Nl)ao A(Nt), = t KKr° (ND. 7 <br /> sar <br /> Where KspT is defined as <br /> 0 0 for FC<5% <br /> 0 0167.(FC-5) for 5%<FC<35% <br /> I • <br /> 05 for FC>35% <br /> FC-Fines Content in% <br /> (N1)s� Equivalent Clean Sand(N1)eo (Nl)wm=(N1)so + A(N1)eo I 7 <br /> ISu Undrained shear strength-Nkt is use selectable Su=Qt-cry 2 <br /> Nit <br />' k Coefficient of permeability(assigned to each SBT zone) 6 <br /> Bq I Pore pressure parameter I Bq= <br /> II Au I 2 <br /> Q,_'7V <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined by On=Qt-cry 4 <br /> Robertson, 1990 a I <br /> v <br /> Rfn Normalized Rf for Soil Behavior Type classification as defined byIS 4 <br /> R <br /> I Robertson, 1990 fn-100%°Qt-av <br /> SBTn Normalized Soil Behavior Type(slightly modified from that published by 4 <br /> Robertson, 1990 This version includes all the sod zones of the original <br /> I non-normalized SBT chart-see figure 1) <br /> Qct Normalized Qt for seismic analysis qct =qc•(Pal(y,)o s ( 5 <br /> where Pa=atm pressure <br /> I Qc1 N Dimensionless Normalized Qtl qci N=qci /Pa <br /> where Pa=atm pressure <br /> • WIEGG <br /> I <br /> I <br />