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CPT Interpretations U Wt Unit Weight of soddetermined from 1) uniform value or 2) value assigned to each S8T zone - - -_- 3) user supplied unit weight profile TStress Total vertical overburden stress at mid layer depth TStre r c=�y h, f where y,is layer unit weight h,is layer thickness ES&ess Effective vertical overburden stress at mid layer depth EStress=TStress—Ueq Ueq Equilibrium pore pressure determined from 1) hydrostatic from water table depth 2) user supplied profile Cn SPT Nsa overburden correction factor where a, is rn tsf 05<C„<20 196o SPT N value at 60%energy calculated from Qt/N ratios assigned to each 3 SBT zone (N1)60 I SPT Nao value corrected for overburden pressure Mao=Cn ,Me 3 A(M)6a Equivalent Clean Sand Correction to(N1)6o A(N1)60 _ KSPT _ (N1)60 7 1-Ksrr Where KSPT is defined as 0 0 for FC<5% 0 0167•(FC-5) for 5%<FC<35% 05 for FC>35% FC-Fines Content in% (N1)eoas Equivalent Clean Sand(N1)sa (W)GO.=(N1)eo + p(N1)eo A 7 Su Undrained shear strength-Nkt is use selectable Su-Qt-6P 2 Nkt k Coefficient of permeability(assigned to each SBT zone) I 6 Bq Pore pressure parameterAu I 2 Bq w Qt-6y Qtn Normalized Qt for Soil Behavior Type classification as defined by Qt-6v 4 Qtn=-- Robertson 1990 cr v Rfn Normalized Rf for Soil Behavior Type classification as defined by f,. 4 Robertson, 1990 - -- Rfn=10 G°/a Qr-6� SBTn Normalized Sod Behavior Type(slightly modified from that published by 4 Robertson 1990 This version includes ail the soil zones of the original non-normalized SBT chart-see figure 1) Qc1 I Normalized Qt for seismic analysis qct =qc•(Palc%')a s 5 where Pa=atm pressure Qc1 N Dimensionless Normalized Qt1 =qcl /P whereatm pressure • TCONE 1