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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 /> --- __..._._..-... ----------- ... __.._. <br /> TStress Total vertical-overburden stress at mid layer depth TStress <br /> where n is layer unit weight <br /> h,Is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth EStress- W <br /> =TSiress•—Ueq <br /> U Eeq <br /> quill q pone pressure determined from: <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT Nao overburden correction factor Cn=(.;'f <br /> Mere %'is in tsf <br /> 0.5<C„<2.0 <br /> Neo SPT N value at 600/.energy calculated from CWN ratios assigned to each 3 <br /> SBT zone <br /> (N1)Bo SPT Navalue corrected for overburden pressure N1eo=Cn.Neo 3 <br /> 0(N7)so Equivalent Clean SandCorrectionto{N1�o a(N1)� - Ksrr .(N1) 7 <br /> w <br /> 1 Ksrr <br /> Where. KsPr is defined as: <br /> 0.0 for FC<5% <br /> 0.0167 e(FC-5) for 5°k a FC<35% <br /> 0.5 for FC>35% <br /> FC-Fines Content in% <br /> (N1)eo.$ Equivalent Clean Sand(N1)ao (Nl�ap=(N1�o +�A(N1)eo - --- 7 <br /> Undrained shear strength-Nkt is use selectable SU=Qr-a,, 2 <br /> Nkr <br /> --.-......... _...,.,..,.._. ..._.__..,.... ._...._...-_._...... -- .. _ . . .. _...,..._...... . .. ... ......... ...... .. ...- -.._.._.... . - ...... <br /> k Coefficient of permeability(assigned to each SBT zone) 6 <br /> Bq Pore pressure parameter eu 2 <br /> 1 <br /> 4-= <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined by Q! -a� 4 <br /> Robertson,1990 Qln <br /> Cr v <br /> _-_..._.... .. _.._....._..._.._..._.... ...__.._..._..._.__ . _ ..._.._.....-. <br /> Rfn Normalized Rf for Soil Behavior Type classification as defined by n 100%•` f' 4 <br /> Robertson,1990 Q1_a� <br /> SBTn Normaiized Sal Behavior Type(slightly modified from that published by .......... <br /> 4 <br /> Robertson,1990, This version includes all the soil zones of the original <br /> non-normalized SBT chart-see figure 1) <br /> Qe1 Normalized Qt for seismic anal.. s _......_..-_-............. ._ ._•.._..._._..._._.___.. <br /> i � qct =qc.(Pala,)o.s 5 <br /> { where: Pa=atm.pressure <br /> Qc1N.. Dimensionles sNormalized.......... ........ . _.. gc1'/'Pa- <br /> where: <br /> _....-- -.._..,...•' • ._... ....._........- --- <br /> 0t1 qct N= 1 Pa <br /> where: Pa=atm.pressure <br /> ff <br /> CONE ESC <br />