Laserfiche WebLink
CPT tnterpretabons <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 TStr+ess=Ir,h, <br /> -, <br /> where n is layer unit weight <br /> hi is layer thickness <br /> EStress ( Effective vertical overburden stress at mid layer depth I EStress=Mress-Ueq <br /> Ueq Equilibrium pore pressure determined from: <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn SPT Neo overburden correction factor Cn=(c j-0.5 <br /> where a, is in tsf <br /> 0.5<C„<2.0 <br /> Neo SPT N value at 60%energy calculated from QVN ratios assigned to 3 <br /> each SBT zone <br /> (N1)OO SPT Neo value corrected for overburden pressure Nlw=Cn o NM 3 <br /> A(N1)r,o Equivalent Clean Sand Correction to(N1)eD A(M). = t KKr o(NI)" 7 <br /> sPr <br /> Where: ICsrrr is defined as: <br /> 0.0 for FC<5% <br /> 0.0167 o(FC-5) for 5%<FC c 35% <br /> 0.5 for FC>35% <br /> FC-Fines Content in% <br /> (Nim Equivalent Clean Sand(N1)eo I (N1)wcs=(N1)eo + A(Ni)w I 7 <br /> Su Undrained shear strength-Nkl is use selectable Su-Qr-a� 2 <br /> NM <br /> k Coefficient of permeability(assigned to each SBT zone) E 6 <br /> Bq Pore pressure parameter Au 2 <br /> Bq= <br /> Qt-a„ <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined by Qrn_Qr a, 4 <br /> Robertson, 1990 ' <br /> Rfn Normalized Rf for Soil Behavior Type classification as defined by - fs 4 <br /> Robertson, 1990 100"finQt-Qv <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 /> Qc1 Normalized Qt for seismic analysis qct=qc•(Pa/6,)o.s 5 <br /> where: Pa=atm.pressure <br /> Qct N Dimensionless Normalized Qtt qct N=qc1 1 Pa <br /> where: Pa=atm.pressure <br /> EGG <br />