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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 at mid layer depth T'Stress=.1 y h <br /> !-, <br /> where n is layer unit weight <br /> h,is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth Mress=TStress-Ueq <br /> Ueq Equilibrium pore pressure determined from 1 <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT NOD overburden correction factor Cn=(crjO5 <br /> where d,;is 1n fsf <br /> 05<Cn<20 ! <br /> Neo SPT N value at 60%energy calculated from Qt/N ratios assigned to f 3 <br /> each SBT zone <br /> (Ni)e SPT Nam value corrected for overburden pressure ( N16o=Cn.Neo I 3 <br /> �(N1)Bo Equivalent Clean Sand Correction to(N1)e ! A(M). = I KKr •(NI), 7 <br /> SPT <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 /> (N1)6oc$ Equivalent Clean Sand(NI)BO I (N1)socg=(N1)eo + 4(N1)w 7 <br /> Su Undrained shear strength-Nkt is use selectable Su Qr__1„ 2 <br /> NM <br /> k Coefficient of permeability(assigned to each SBT zone) I 6 <br /> Bq Pore pressure parameter Bq <br /> I Du 2 <br /> Qt-Qv <br /> Qtn Normalized Qt for Sod Behavior Type classification as defined by Qm=Qr-d 4 <br /> Robertson, 1990 <br /> d „ <br /> Rfn Normalized Rf for Sod Behavior Type classification as defined byI f 4 <br /> Robertson, 1990 !I Rfm=100%* s <br /> Qt"dv <br /> SBTn Normalized Soil Behavior Type(slightly modified from that published by 4 <br /> Robertson, 1990 This version includes all the soil zones of the original <br /> non-normalized SBT chart-see figure 1) <br /> Qct Normalized Qt for seismic analysiso s 5 <br /> qct =qc•(Pa16,;) <br /> where Pa=atm pressure <br /> Qct N Dimensionless Normalized Qt1 qct N=qc1/Pa <br /> where Pa=atm pressure <br /> J JE_GG <br /> l�� <br />