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CPT Interpretations <br /> U Wt Unit Weight of soil 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 et mid layer depth __ TStress= y h- - -- -_ <br /> Mere n is layer unit weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stns at mid layer depth EStress=TStress-Ueq j <br /> Ueq Equilibrium pore pressure determined from �- <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT Neo overburden correction factor <br /> where a, is in tsf <br /> 05<Qn<20 <br /> Neo SPT N value at 60%energy calculated from QdN ratios assigned to each 3 <br /> SBT zone I <br /> (N1)So SPT Neo value corrected for overburden pressure MW=Cn.Nva 3 <br /> e(N1)eo Equivalent Clean Sand Correction t0(N1)eo -(A 7 <br /> Where KSPT is defined as <br /> 0 0 for FC<5% <br /> 0 0167•(FC-5) for 5%<FC<35% <br /> 05 for FC?35% <br /> FC-Fines Content in% <br /> Equivalent Clean Sand(N1)eo - (Nl)e0.=(N1)eo + a(N1)e, 7- <br /> Su Undrained shear strength-Nkt is use selectable Su-Qi-cry 2- <br /> N,tr <br /> k Coefficient of permeability(assigned to each SBT zone)-- - - - -- g <br /> Bq Pore pressure parameter du 2 <br /> Bq= <br /> Qtn Normalized Qt for Sal Behavior Type ctassificahon is defined by Qt-6, -- - 4 <br /> Robertson 19W <br /> 6 y <br /> Rfn Normalized Rf for Sal Behavior Type classification as defined by fJ - <br /> Robertson,19W Rfn=100%. 4- I <br /> —dv !I <br /> SBTn Normalized Sail 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 qci=qc•(Pal6Y)a S 5 <br /> where Pa=atm pressure <br /> Qcl N Dimensionless Normalized Qt1 - _ - qci N=qc1 1 Pa ----- <br /> where Pa=atm pressure <br /> • CQNE EC <br /> F_ <br />