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fCPT Interpretations I R U Wt. Unit Weight of sol determined from 1) uniform value or 2) value assigned to each SBT zone I3) user supplied unit weight profile TStress Total vertical overburden ---- - - - stress at rrnd layer depth TStress= y,h where n is layer unit weight h,is layer thickness r EStress Effectrm vertical overburden stns at mid layer depth EStress=TStress—Ueq l Ueq Equilibrium pore pressure determined from - 1) hydrostatic from water table depth �1 2) user supplied profile L Cn SPT NOD overburden correction factor t Where CV is In tsf 05<C„<20 Neo SPT N value at 60%energy calculated from QtlN ratios assigned to each 3 SBT zone (NI)OO SPT Neo value corrected for overburden pressure Nina=G)°Nsa 3 O ( e(N1)so ` Equivalent Clean Sand Correction to(N1)so �(n t)s� = KsPr ,(�0 0 7 fL �-Ksrr Where Kswr is defined as 0 0 for FC<5% 0 0167°(FC-5) for 5%<FC<35% 05 for FC n 35% FC-Fines Content in% (Ni)eo,x Equivalent Clean Sand(N1)so (NI�oL,=(N1)eo + e(Ni)so 7 I Su Undrained shear strength-Nkt is use selectableSer= �'Qt-v„ 2 Ala k Coefficient of permeability(assigned to each SBT zone) 6 Bq Pore pressure parameter - B 2 4= Qt-Q, - - Qtn Normalized Qt for Sal Behavior Type classification as defined byn IRobertson, 1990 6 - Rfn Normalized Rf for Sal Behavior Type classification as defined by fs 4 pF1f Rfn 100% 6 Robertson 1990 = 1 4 �_ y SBTn Normalized Sod Behavior Type(slightly modified from that published by 4 Robertson, 1990 This version includes all the soil zones of the original non-normalized SBT chart-see figure 1) Qc1 Normalized Qt for seismic analysis qct =qc°(Pala,)'e 5 where Pa=atm pressure Qct N Dimensionless Normalized Qt1 qcl N=qc1 /Pa where Pa=atm pressure ? CONETEC P �