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CPT Interpretations <br /> U Wt. Unit Weight of sal determined from <br /> S 1) uniform value or <br /> 2) value assigned to each SBT zone <br /> 3) user supplied and weight prate <br /> TStress Total vertical overburden stress at mid layer depth TStress= y h, <br /> where h�layer and weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stress at mrd layer depth EStress=TStress--Ueq <br /> Ueq Equilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied prole <br /> Cn SPT Ngo overburden correction factor C17=(1,70-5 <br /> where a, is n tsf <br /> 05<Cn<20 <br /> Ngo SPT N value at 60%energy calculated from QVN ratios assigned to each 3 <br /> SST zone <br /> (N1)ea SPT N60 value corrected for overburden pressure NIda=Cn •Mo # 3 <br /> p(N1)ea Equivalent Clean Sand Correction to(N1)go K,, 7 <br /> l-K tri <br /> Where KZPT is defined as <br /> 0 0 for FC<5% <br /> 00167-(FC-5) for 5%<FC<35% <br /> 05 for FC>35% <br /> FC-Fines Content in% <br /> (N1Equivalent Clean Sand(N1)eo (N1Na� (N1)so + o(N1)sa� - - 7 <br /> Su Undraped shear strength-Nkt is use selectable Su Ct-ay 2 <br /> = - <br /> hk <br /> k Coeffic ent of permeability(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter I _ All - I 2 <br /> Bq Qt-c„ <br /> Qin Normalized Qt for Soil Behavior Type classification as defined by I Otrr_ <br /> Robertson 1990 0 <br /> Rfn Normalized Rf for Sal Behavior Type classification as defined by I, 4 <br /> Rfn=100% <br /> b• <br /> Robertson, 1990 _ <br /> SBTn Normalized Soil Behavior Type(slsghtly 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 analyss qct =qc•(PaAa,')a s 5 <br /> Y _ - where Pa=atm pressure <br /> Qct N Dimens,oniess Normalized Qt1 gc1N=qcl /Pa <br /> where Pa=atm pressure <br /> � l � <br /> �-- <br />