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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 weight profile <br /> TStress Total vertical overburden stress at mid layer depth TStress Y,J1, <br /> .z <br /> where yr is layer unit weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth EStress=TStress—Ueq <br /> Ueq Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> I <br /> Cn SPT Nen overburden correction factor <br /> where a,'istotsf <br /> 05<C„ 20 <br /> Neo SPT N value at 60%energy calculated from Qt/N ratios assigned to each 3 <br /> SBT zone <br /> (N1)SO SPT N50 value corrected for overburden pressure N1w=Cn .Neo 3 <br /> A(NI)5o Equivalent Clean Sand Correction to(N1)w d(IV I)bo = Ksar •(Iv1160 7 <br /> I—K, <br /> Where Ksar is defined as <br /> 00 for FC<5% <br /> 0 0167•(FC-5) for 5%<FC<35% <br /> 05 for FC>35% <br /> �i <br /> FC-Fines Content in% <br /> (N1)ee°, Equivalent Clean Sand(N1)eo (141)w�=(N1)w + 4(N1)ac 7 <br /> Su Undrained shear strength-Nkt is use selectable 5u=Qt—ay 2 <br /> Ara <br /> k Coefficient of permeability(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter 4u 2 <br /> Bq=Qt-6v <br /> Qtn Normalized Qt for Sod Behavmr Type classification as defined by Qin=Qt—-y 4 <br /> Robertson, 1990 Q <br /> V <br /> Rfn Normalized Rf for Sod Behavior Type classification as defined by f 4 <br /> Robertson,1990 Rfn-1fl0%. ' <br /> Qr—or, <br /> SBTn Normalized Sal Behavior Type(slightly modified from that published by 4 <br /> Robertson,1990 This version mctudes all the sal zones of the original <br /> non-normalized SBT chart-see figure 1) <br /> Qc1 Normalized Qt for seismic analysis qct =qc•(Pa/a„')o 5 5 <br /> where Pa=atm pressure <br /> Qc1 N Dimensionless Normalized Qt1 qct N=qcl/Pa <br /> where Pa=atm pressure <br /> GREGG <br /> M <br />