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' CPT Interpretations <br />' U Wt. Unit Weight of soil determined from <br /> 1) untfonn value or <br />' 2) value assigned to each SBT zone <br /> 3) user supplied unit weight profile <br /> TStress Total verbcal overburden stress at mid layer depth Mmss- <br /> -EY,h, <br />' where n is layer unit weight <br /> h,is layer thickness <br /> EStress <br /> Effective vertical overburden stress at mid layer depth Stress=?S'tress—Ueq <br />' Ueq Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied pra ie <br />' Cn SPT NaD overburden correction factor Cr'=:")-05 <br /> where w'is rn tsf <br /> 05<C,, 20 <br />' Nsn SPT N value at 60%energy calculated from CWN ratios assigned to 3 <br /> each SBT zone <br /> (N1)GO SPT Nw value corrected for overburden pressure N1so=Cn.NM ( 3 <br />' A(N1)so Equivalent Clean Sand Correction to(141)w A(Nl),, t K �(m)" I 7 <br /> sir <br /> Where ICspT es defined as <br />' 0 0 for FC<5% <br /> 00167*(FC-5) for 5%<FC<35% <br /> 05 for FC a 35% <br />' • FC-Fines Content in% <br /> (N1} Equivalent Clean Sand(Nt)w (N1)so==(NI)ea + A(Ni)eo 7 <br />' Su Undrained shear strength-Nkt is use selectable Sri—Qt—cv 2 <br /> N� <br />' k Coefficient of permeability(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter Au 2 <br /> Qt--rrq <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined by Qr—cr� 4 <br /> Robertson, 1990 Q01= <br /> a „ <br /> Rfn Normalized Rf for Soil Behavior Type classification as defined by L 4 <br /> Robertson, 1990 Rfn=140%• <br /> SBTn Normalized Sort Behavior Type(slightly modified from that published by 4 <br /> Robertson, 1990 This version includes all the soil zones of the original <br /> non-normahzed SBT chart-see figure 1) <br /> IQct Normalized Qt for seismic analysis qct =qc.(Pa/cr,;)°s 5 <br /> where Pa=atm pressure <br /> Qc1N Dimensionless Normaltzed Qt1 gc1N=qc1 /Pa <br /> where Pa=atm pressure <br /> EGG ` <br /> �rN <br /> I <br />