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CPT Interpretations <br /> 1 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,A <br /> where yr is layer unit weight <br /> h,is Layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth EStress w Mtress-Ueq <br /> Ueq Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> I Cn SPT Neo overburden correction factor Cn=(M)-05 <br /> where crV is in fsf <br /> 05<C„<20 <br /> 1 Neo I SPT N value at 60%energy calculated from Qt/N ratios assigned to f I 3 <br /> each SBT zone <br /> (N1)eo SPT Neo value corrected for overburden pressure I N1w=Cn .Nw I 3 <br /> 4(Ni)eo Equivalent Clean Sand Correction to(N1)w A(Nl)60 _ K"T. { )Nl . 7 <br /> t-Ksrr <br /> Where Ksa-r is defined as <br /> 0 0 for FC<5% <br /> 00167+(FC-5) for 5%<FC<35% <br /> 05 for FC n 35% <br /> FC-Fines Content in% <br /> (N1)w,, Equivalent Clean Sand(N1)6o (Ni)eors=(N1)eo + o(N1)so 7 <br /> Su Undrained shear strength-Nkt is use selectable Su=Qt--Y 2 <br /> Nkr <br /> k Coefficient of permeability(assigne(I to each SBT zone) I 6 <br /> Bq I Pore pressure parameter I _ av 2 <br /> Bq Qt-ay <br /> 1 Qtn Normalized Qt for Sod Behavior Type classification as defined by On=Qr-Qv I 4 <br /> Robertson 1990 v <br /> Rfn Normalized Rf for Sod Behavior Type classification as defined by Rfn=l00%. f: f 4 <br /> Robertson, 1990 <br /> Qt-Q„ <br /> SBTn Normalized Sod Behavior Type(shghtty modified from that published by 4 <br /> Robertson 1990 This version includes ail the sod zones of the original <br /> non-normalized SBT chart-see figure 1) <br /> 1 Qct Normalized Qt for se+smce analysis qct =qe•(Pa/cr„)o 5 5 <br /> where Pa=atm pressure <br /> QcIN Dimensionless Normalized Qti gciN=qc1 1 Pa <br /> where Pa=atm pressure <br /> I <br /> i EGG <br /> I <br /> 1 <br />