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' CPT Interpretations <br />' U Wt. Unit Weight of sod 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 /> i-` <br /> where n is layer unit weight <br /> h,is layer thickness <br /> EStress l Effective vertical overburden stress at mid layer depth I EStress=Mress-Ueq I <br />' Ueq f Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br />' Cn SPT Nso overburden correction factor CR=(O„)-s <br /> I where aV is in fsf <br /> 05<Cn<20 <br /> Nw SPT N value at 60%energy calculated from Qt/N ratios assigned to I 3 <br />' each SBT zone <br /> (N1)m SPT N60 value corrected for overburden pressure f Nfm=Cn•Nw 3 <br />' 4(N1)Bo Equnralent Clean Sand Correction to(N1)6 I a(Nl), = 1 Kr e(NI), 7 <br /> sFr <br />' Where KsPT is defined as <br /> 0 0 for FC<5% <br /> 0 0167 a(FC-5) for 5%<FC<35% <br /> 05 for FC a 35% <br />' • FC-Fines Content in% <br /> (Ni)eOCS I Equivalent Clean Sand(N1)e0 (N1)eocs=(N1)w + e(N1)so 7 <br />' Su Undrained shear strength-Nkt is use selectable A-Qt-o-, 2 <br /> N,tr <br />' k I Coefficient of permeability(assigned to each SBT zone) I g <br /> Bq Pore pressure parameter Aa I 2 <br /> Bq=Qr- <br />' Qtn Normalized Qt for Soil Behavior Type classrfrcation as defined by I Qt„-Qt-ery 4 <br /> Robertson, 1990 a <br /> i <br /> Rfn Normalized Rf for Sod Behavior Type classification as defined by fs 4 <br />' <br /> Robertson, 1990 Rfn=100%+Q1-a„ <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 onginal <br /> non-normalized SBT chart-see figure 1) <br />' Qcl Normalized Qt for seismic analysis05 5 <br /> gc1=�qc+(Pala„') I <br /> where Pa=atm pressure <br />' Qc1N Dimensionless Normalized Qt1 gc1N=qct /Pa <br /> where Pa=atm pressure <br /> . EGG <br /> I <br />