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CPT Interpretations <br /> • u Wt Una Weight of sod determined from <br /> 1) uniform value or <br /> 2) value assigned to each SST zone <br /> 3) user supplied unk weight profile <br /> TStress - Total vertical overburden stress at mid layer depth -- -TStress Y,h,T <br /> where n is layer unit weight <br /> A is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth EStress=TStress-Ueq- <br /> tleq Equihbnum pore pressure determined from --- <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT Naa overburden correction factor Cn=(a,)a s <br /> where a,'is in tsf <br /> Neo SPT N value at 60%energy calculated from Qt/N ratios assigned to each 3 <br /> SBT zone <br /> (N1)e0 SPT Neo value corrected for overburden pressure Mao=Cn•Nea 3 <br /> 0(N1)ao Equivalent Clean Sand Correction to(N1)ao o(N1) _ Ksvr .(N] 7 <br /> 1—Ksrr <br /> Where KsPT is defined as <br /> 00 for FC<5% <br /> 0 0167•(FC-5) for 5%<FC<35% <br /> 05 for FC>35% <br /> FC-Fines Content in% <br /> (N1)eacs Equivalent Clean Sand(Nl)so - -- - (Nl)aocs=(Nl)eo + a(Nl)eo 7 <br /> Su Undrained shear strength-Nkt is use selectable Suu_Qt-v,, - --- 2- <br /> N/r <br /> k Coefficient of permeability(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter gy= An - 2 <br /> Qt—_Cry <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined byQtn=Qt-a, 4 <br /> Robertson, 1990 a v <br /> Rfn Normalized Rf for Sal Behavior Type classification as defined by Rfn=100% fs 4 <br /> Robertson, 1990 Qt-a, <br /> SBTn Normalized Sal Behavior Type(slightly modified from that published by 4 <br /> Robertson 1990 This version includes all the sal zones of the original <br /> non-normalized SBT chart-see figure 1) <br /> Qct Normalized Qt for seismic analysis qct =qc«(Pa16„)o s 5 <br /> where Pa=aim pressure <br /> Qct N Dimensionless Normalized Qt1 qc1 N=qct!Pa <br /> where Pa=atm pressure <br /> - -� CONE EC <br />