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' CPT Interpretations Wt Unit Weight of sod determined from 1) uniform value or ' 2) value assigned to each SBT zone 3) user supplied unit weight profile TStress Total vertical overburden stress at mid layer depth TStressµ�y,h, ' where N is layer unit weight h,is layer thickness EStress I Effective vertical overburden stress at and layer depth ]-Stress=TStress—Ueq ' Ueq Equilibrium pore pressure determined from 1) hydrostatic from water table depth 2) user supplied profile ' Cn SPT Neo overburden correction factor where av is in tsf I 05<Cn<20 Neo SPT N value at 60%energy calculated from Qt1N ratios assigned to I 3 each SBT zone (N1)6 SRT N60 value corrected for overburden pressure N16o=Cn•No 3 ' A(N1)eo Equivalent Clean Sand Correction to(N1)6o a(M) Ksar •(N1) 7 co = � ' Where KsRr is defined as 00 for FC<5% 00167-(FC-5) for 5%<FC<35% 05 for FC>35% lieFC-Fines Content in% (N1)$om Equivalent Clean Sand(Ni)eo ` (N1)e0.=(N1)6o + A(N1)eo I 7 ' Su Undrained shear strength-Nkt is use selectable Qt—-v 2 N,l ' k I Coefficient of permeability(assigned to each SBT zone) f 6 Bq Pore pressure parameter I g9= li Du I 2 Qr—ory t Qtn Normalized Qt for Soil Behavior Type classification as defined by Qr—'„ JJ 4 Robertson, 1990 Qrx= I Cr RfnI Normalized Rf for Sod Behavior Type classification as defined by v fs I q Robertson, 1990 Rf)7 100%. Qt—o„ ' SBTn Normalized Sod Behavior Type(slightly modified from that published by 4 Robertson 1990 This version includes all the soil zones of the original non-normalized SBT chart-see figure 1) ' act I Normalized Qt for seismic analysis qc9 =qc•(Pa/6„')0 5 5 I where Pa=atm pressure 111 ' Qc1 N Dimensionless Normalized Qt1 qct N=qc1 1 Pa where Pa=atm pressure EGG I