Laserfiche WebLink
01 <br /> - . .� <br /> CPT Interpretations <br /> 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 Ts rens= Ya h, <br /> where n is layer unit weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth EStrese=TSiress—UO <br /> Ueq E=quilibrium pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT N60 overburden correction factor Cn=(a„)-O8 <br /> where a„'Is to tsf <br /> _ 05<_G„<20 <br /> Nso SPT N value at 60%energy calculated from Qt1N ratios assigned to 3 <br /> each SBT zone <br /> (Ni)eo SPT Neo value corrected for ove_- rburden pressure N1sa=Cn•Nso 3 <br /> 4(N1)w Equivalent Clean Sand Correction to(N1)6o K57t Kr •(Nt)� 7 <br /> sir <br /> Where Ksrr 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 /> (N1)ea. Equivalent Clean Sand(N1)eo (N1)wC.=(N1)w + o(N1) 7 <br /> Su Undrained shear strength-Nkt is use selectable SU—Qt—a„ 2 <br /> Nkr <br /> k I Coefficient of permeability(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter eu 2 <br /> B9= <br /> Qs--rrV <br /> Qtn Normalized Qt for Soil Behavior Type Classification as defined by Qm=Qi—dv 4 <br /> Robertson, 1990 0 , <br /> Rfn Normalized Rf for Soil Behavior Type classification as defined by fQ4 <br /> Robertson, 1990 1Zfn=100%•Ql-aY <br /> SBTn Normalized Soil Behavior Type(slightly moddred from that published by 4 <br /> Robertson, 1990 This version includes all the soil zones of the onginal <br /> non-normalized SBT chart-see figure 1) <br /> Qci Normalized Qt for seismic analysis qct =qc•(Pala„)()s 5 <br /> where Pa=atm pressure <br /> Qct N Dimensionless Normalized Qtf qct N=qc1 1 Pa <br /> where Pe=atm pressure <br /> EGG <br />