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CPT Interpretations <br /> InterpretedEquation Ref <br /> Parameter Description <br /> • qct qt normalized for overburden stress used for seismic qr,=qt,(Pala,)o s <br /> whPa=atm Pressure 3 <br /> ere <br /> analysis qt is to MPa <br /> qc,N qc,N=qct I Pa <br /> qt:,in dimensionless form used for seismic analysis where Pa=atm pressure 3 <br /> Kc= l0 forIc_.T164 <br /> Kc Equivalent clean sand correction for qc,N K,=f(!rj for It> 164 (see reference) 3 <br /> Kc= 164 64<Ic<236andFc<05% <br /> ge,Nes Clean Sand equivalent CION gc,Nm=quem•Ke 3 <br /> Ic=j(3 47—IogroQ)2+(109t)Fr+1 22)2 f 5 <br /> Where (qt O'. -)' <br /> \\Pa <br /> P. <br /> k Soil index for estimating grain characteristics And Fr is in percent 3,8 <br /> Pe=afrnosphenc pressure <br /> Pa2=ahnosphenc pressure <br /> n vanes from 0 5 to 10 and is <br /> selected in an iterative manner based on the <br /> resulting Ic <br /> FC=i 75(Ic9?5)-3 7 <br /> FC Apparent fines content(%) FC=100 for lc>3 5 3 <br /> FC=0 for Ic< 126 <br /> FC=5%rf164<Ic<26ANDFr<O5 <br /> le<1 31 Zone=7 <br /> This parameter is the Soil Behavior Type zone based on 1 31 <Ic<2 05 Zone=6 <br /> Ic Zone the ti:parameter(valid for zones 2 through 7 on SBTn 2 05<Ic<2 60 Zone=5 3 <br /> 260<Ic<295 Zone=4 <br /> chart) 2 95<Ic<3 60 Zone=3 <br /> Ic>3 60 Zone=2 <br /> Friction Angle determined from one of the following user <br /> selectable options <br /> PHI 5 <br /> a) Campanella and Robertson See reference <br /> b) Durgunoglu and Mdchel <br /> c) Janbu <br /> Relative Density determined from one of the following user <br /> selectable options <br /> Dr a)Ticino Sand See reference 5 <br /> b) Hokksund Sand <br /> c)Schmertmann 1976 <br /> d)Jamiolkowski-All Sands <br /> a)Based on Schmertmann's method involving a <br /> plot of S„Irr,;A S„!av)Nc and OCR <br /> OCR Over Consolidation Ratio—2 methods available b)Based on OCR=Kql—6,� 5 <br /> � <br /> Q. <br /> where an average value of k=0 3 is used <br /> State The state parameter is used to describe whether a sod is <br /> Parameter contractive(SP is positive)or dilative(SP is negative)at See reference 9,7,5 <br /> large strains based on the work by Seen and Jeffenes <br /> GREGG <br /> CPTSUMM-1 20C—Rev 02-07-31 <br />