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CPT Interpretations <br /> U Wt Unit Weight of sod determined from <br /> 1) unrform value or <br /> 2) value assigned to each SBT zone <br /> ' - - 3) user supplied unit weight profile <br /> TStress Total vertical overburden stress at mrd layer depth 7-Stress-�Y h, <br /> ' where ya is layer unit weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth ks'r ss=TStress--Ueq <br /> ' Ueq - Equdibnum pore pressure determined from µ <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT Neo overburden correction factor Cn=(v„)-05 - - <br /> where cris in tsf <br /> 05<C„<20 <br /> Neo SPT N value at 80%energy calculated from MON ratios assigned to 3 <br /> ' each SBT zone <br /> (141)o SPT Nen value corrected for overburden pressure N160=Cn •Neo 3 <br /> i <br /> ' a(N1)w Equivalent Clean Sand Correction to (N1)eo t K�r 7 <br /> •(NI), <br /> sir <br /> Where Ksar is defined as <br /> ' 0 0 for FC<5% <br /> 001674,(FC-5) for 5%<FC<35% <br /> 0 5 for FC>35% <br /> FC-Fines Content in% <br /> (N1)eoc I Equivalent Clean Sand(N1). I (N1)w,,=(N1)so + e(N1)Go 7 <br /> Su Undrained shear strength-Nkt is use selectable Su-Qr---v 2 <br /> Nkr <br /> k I Coefficient of permeability(assigned to each SBT zone) g <br /> Bq Pore pressure parameter Au 2 <br /> E4=Qi_6v <br /> ' Qtn Normalized Qt for Sod Behavior Type classification as defined by Qtr-Qt- 4 <br /> Robertson, 1990 <br /> Rfn Normalized Rf for Sod Behavior Type classification as defined by v j 4 <br /> Robertson, 1990 Rfn=106%• ° <br /> - - Qr-vv <br /> SBTn Normalized Soil Behavior Type(slightly_modified from that published by 4 <br /> Robertson,1990 This version includes all the sod zones of the original <br /> non-normal¢ed SBT chart-see figure 1) <br /> ' Qc1 Normalized Qt for seismic analysis qct =qc•(Pal6,')o 5 5 <br /> where Pa=atm pressure <br /> Qc1 N Dimensionless Normalized Qti qct N=qc1/Pa <br /> ' where Pa=atm pressure <br /> EGG <br />