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CPT Interpretations <br /> U Wt Unit Weight of sal 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 h, <br /> 1 „ <br /> where yrs layer unit weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stress at mrd layer depth EStress=TStress—Ueq <br />' Ueq Equilibnum pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT NBo overburden correction factor l Cri=(m)-0 5 <br /> where av'rs in tsf <br /> 05<Qn<20 <br /> Neo SPT N value at 60%energy calculated from Qt1N ratios assigned to each 3 <br /> SBT zone <br /> (N1)eo SPT N60 value corrected for overburden pressure N1w=Cn•Nw 3 <br />' 0(M), Equivalent Clean Sand Correction to(Ni)eo (NI)w _ K.,, .(N 1)" 7 <br /> - 1-Ksrr <br />' Where Ksar is defined as <br /> 0 0 for FC<5% <br /> 00167•(FC-5) for 5%<FC<35% <br /> 05 for FC>35% <br /> FC-Fines Content in% <br /> (NI)GO. EqunralentClean Sand(N1)ao I (N1)so.=(N1)eo + 0(N1)oa 7 <br />' Su Undrained shear strength-Nkt is use selectable Su=Qr-a� 2 <br /> Nr, <br /> ' k Coefficient of perrneatxIdy(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter Bq= Qu 2 <br /> Qr-u� <br /> ' <br /> Olin Normalized Qt for Sal Behavior Type classification as defined by Qtn_Qr-av 4 <br /> Robertson,1990 or <br /> Rfn Normalized Rf for Sal Behavior Type classification as defined by Rfit=100%• f, 4 <br /> ' <br /> Robertson 1990 Q1-vY <br /> I � <br /> SBTn Norn-dized Sal Behavior Type(slightly modified from that published by 4 <br /> Robertson 19W This version includes all the sal zones of the original <br /> non-nonnaleed SBT chart-see figure 1) <br /> Qct Normalized cat for seismic anatysrs qc1 =qc•(Pal6„')o s 5 <br /> where Pa=atm pressure <br /> Qc1N Dimensionless Normalized Qt1 gc1N=qc1 t Pa <br /> where Pa=atm pressure <br /> f <br /> . CONE EC <br /> �lwllrl <br />