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CPT Interpretations <br /> LI Wt Lina Weight of soil determined from <br /> 1) uniform value or <br /> ' 2) value assigned to each SBT zone <br /> 3) user supplied and weight profile <br /> TStress - Total vertical overburden stress if layer depth ,_- --- TStress= _ - <br /> EY,h, <br /> where n is layer unit weight <br /> hj is layer thickness <br /> EStress Effective vertical overburden stress at mid layer depth EStress=TStress--Ueq µ <br /> Ueq_ Equihbrrum pore pressure determined from-- <br /> 1) hydrostatic from water table depth <br /> 2) user supplied profile <br /> Cn 4 SPT Neo overburden correction factor- <br /> where a„'rs to tsf <br /> _ _ 05<C,,<2_0val <br /> ' Neo SPT N ue at 60%energy calculated from QttN ratios assigned to - W 3 _ <br /> each SBT zone <br /> (N1)eo SPT Neo value corrected for overburden pressun: _YNf6p= Cn •Neo l - -Y 3 <br /> 1 A(t`t7)eo Equwafent Clean Sand Correction-to(N 1)6o7 <br /> Q(Nl),= KspT •(Nl), 7 <br /> 1-Ksrr <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 /> (Nfjea Equivalent Clean Sand(N1)eo - - (Nl)so�.=(N1)eo + a(N1)eo -7 <br /> ' Su_ Undrained shear strength--Vt is use selectable Su M Qt-6" - 2 <br /> Nk <br /> i <br /> ' k Coeffcient-of permeability(assigned to each SBT zone) <br /> Bq Pore pressure parameter Bq Du 4 2 <br /> = <br /> Qt-a" <br /> ' Qtn Nomnafixed Qt for Sod Behavior Type classeication as defined by Qin A Qt-a, _ 4 <br /> Robertson, 1990 I a <br /> " <br /> Rfn Normaf¢ed Rf for Sod Behavior Type classification as defined by - • fs 4 <br /> R <br /> Robertson, 7990 � .ln lOQ°19 Qt w a" _ - <br /> SBTn Normalized Sod 8e6avror 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 /> dc7 Normal¢ed Qt for s conic analysis <br /> qct =qc•(Pa16')°5 5 <br /> E where Pa=atm pressure <br /> ' QcIN Dimensionless Normalized Qt1 _ gciN=qci/Pa _ <br /> where Pa=atm pressure <br /> EGG <br />