Laserfiche WebLink
CPT Interpretations <br /> UM Und weight cf sal 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 TSlress=2:7,h, <br /> where �s layer and weight <br /> h,is layer thickness <br /> ) Stress E=ffective vertical overburden stress at mid layer depth - 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=(a)-0 s <br /> where rr, ,.s n tsf <br /> p5<Cn <20 <br /> Neo SPT N value at 60%energy calculated from Qt/N ratpos assigned to each 3 <br /> ISBT zone <br /> (N1)60 I SPT Nso value corrected for overburden pressure Mao=Ca•Neo I 3 <br />' p(N1)eo Equivalent Clean Sand Correction to(N1)sa a(r�l K'rr .(,V l}� 7 <br /> Where KSPT Is defined as <br />' 0 0 for FC<5% <br /> 0 0167•(FC-5) for 5%<FC<350% <br /> 05 for FC>35% <br /> FC-Fines Content in% - <br /> {iV1)6o�$ Equivalent Clean Sand(N )so (N1)6o�=(N1)eo + o{Niko 7 <br /> Su undrained shear strength-Nkt is use selectable0r-6v 2 <br /> Su= - <br /> Ak <br /> k Coeffi=ent of permeability(assigned to each SST zone) l 6 <br />' Bq Pore pressure parameter Bq_ a° l 2 <br /> 1 - _ - 1 gr_G� _ 1 _ <br /> Qtn Normalized Qt for Soil Behavior Type classification as defined by a <br /> Robertson 1990 - I 6 , <br /> Rfn Normalized Rf for Soil Behwor Type classification as defined by fs a <br /> Rfn l00° <br /> Robertson, 1990 = o•Qt—a, <br /> SBTn Normalized Soil Behavior Type(slightly modified from that published by _ 4 <br /> Robertson, 1990 This version includes all the sai zones of the original <br /> non-normahzed SBT chart-see figure 1) <br /> Qct Normalized Qt for seismic anaiyss qct =qc•(Paf6„)o s 5 <br /> where Pa=atm pressure <br /> Qc1N Dimensionless Normalized Qt1 qc1 N=qci 1 Pa <br /> where Pa=atm pressure <br /> r CT® <br /> 1 r---" <br /> 1 <br />