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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 ?Stress_LVA <br /> $-I <br /> where "is layer unit weight <br /> hr is layer thickness <br /> EStress Effective vertical overburden stress at mrd layer depth 1,4tress=7 Sirens-Ueq <br /> Ueq Equrlibimm pore pressure determined from <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn sPT Nso overburden corre-ction factor Cn=(o-„)� <br /> where av Is in tsf <br /> -- - — 05[Cn<20 <br /> from <br /> N60 SPT N value at 60%energy calculated Qt/N ratios assigned to 4 - 3 <br /> each SBT zone f{ <br /> (N 1)6o SPT Neo value corrected for overburden pressure- Nisa=Cn .Neo 3 <br /> e(N1)ea Equivalent Clean Sand Correchon to(N1)eo L1(Nl)ca = xsrr (Nt)rte 7 <br /> 1-K,,r <br /> Where KSPT is defined as <br /> 0 0 for FC<5% <br /> 0 0-167•(FC-5) for 5%<FC<35% <br /> . <br /> 05 for FC>35% <br /> FC-Fines Content in% <br /> (N1)eow EquWv lent Clean Sand(N1). (N1)spcs=(N1)ro + 0(Nt)eo 7 <br /> Su Undrained shear strength--Nkt is use selectable A=Qt-a, 2 <br /> Nkr <br /> k Coefficient of permeability(assigned to each SBT zone) I 6 <br /> Bq Pore pressure parameter RqAu 2 <br /> - �- <br /> Qt-au <br /> Qtn Normalized Qt for Sod Behavior Type classification as defined by Ot-a„ 4 <br /> Robertson, 1990 Orn- - <br /> _ Q V <br /> Rfn Normalized Rf for Soil Behavior Type classification as defined by j Rfn=100%• -f 4 <br /> Robertson, 1990 `{ <br /> _ Qt-av <br /> SBTn Normalized Sod Behavior Type(slightly ntodifled from that published by 4 <br /> Robertson, 1990 This version includes all the sod zones of the original <br /> non-normalized SBT chart-see figure 1) <br /> Qct Normalized Qt for seismic analysis qct =qc.(Pal6„)os -5 <br /> where Pa=atm pressure <br /> dc-IN Elimensionless Normalized Qt1 gc1N=qc1 1 Pa <br /> where Pa=atm pressure <br /> • 9REGA <br />