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b, <br /> 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 /> _Stress Total vertical overburden stress at mid layer depth _Stressh <br /> = <br /> EY, , <br /> where n 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 /> Cn SPT N60 overburden correction factor Cn=(a„705 <br /> where a„'es to tsf <br /> 05<C,,<20 _ <br /> No SPT N value at 60%energy calculated from Qt/N ratios assigned to each 3 <br /> SBT zone <br /> (N1)eo SPT Neu value corrected for overburden pressure Mw=Cn.Neo 3 <br /> 0(N1)80 EqunralentClean Sand Correction to(N1)eo A(N1)w _ Ksrr .(N1) 7� <br /> — 1_Kerr w <br /> Where KsPT is defined as <br /> 0 0 for FC<50/6 <br /> 0 0167.(FC-5) for 5%a FC<35% <br /> 0 5 for FC>35% <br /> FC-Fines Content in% <br /> (N1)S8CS Equivalent Clean Sand(N1)eo (M)".=(N1)8e + A(N1)so 7 <br /> Su Undrained shear strength-Nkt is use selectable Su=Qt—av 2 <br /> N,u <br /> Tk Coefficient of permeability(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter B4= eu 2 <br /> Q!-Qv <br /> - <br /> Qtn Normalized Qt for Sal Behavior Type classification as defined by Qtn=Qt—vv � <br /> rm4 <br /> Robertson,1990 o v <br /> Rfn Normalized Rf for Sal Behavior Type classification as defined by IV 4 <br /> Robertson,1990 Rfn=100%• <br /> Qt-av <br /> SBTn Normalized Sal Behavior Type(slightly modified from that published by 4 <br /> Robertson,1990 This version includes 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 /> Qct N Dimensionless Normalized Qt1 qct N=qc1/Pa _ _ - <br /> where Pa=atm pressure <br /> EGG <br />