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CPT <br /> Interpretations <br /> Interpreted <br /> Parameter Description <br /> Equation Ref <br /> i A . <br /> g`, qt normalized for overburden stress used for seismic q=j`qt•(Pa/6v')06 � <br /> analysis where: Pa=atm.Pressure 3 <br /> q,is in MPa <br /> gc7N <br /> q0j in dimensionless form used for seismic analysis gcrN=qct I Pa 3 <br /> where: Pa=atm.pressure <br /> Kc=1.O for lc—<1.64 II <br /> Kc Equivalent clean sand correction for qc,N Kc=f Q for lc> 1.64 (see reference) 3 <br /> Kc=1.0for 1.64<1,<2.36and Fc<0.5% <br /> I gc,Ncs Clean Sand equivalent qc,N f <br /> I gatWcs=qc,N•Kc 3 <br /> 111 tc=[(3.47—logroQ)2+(tog,o Fr+1.22)2]°.1 <br /> Where: qt—Cr, Pa °. <br /> Ic Soil index for estimating grain characteristics And Frislin percent 3,8 + <br /> Pe=atmospheric pressure <br /> Pae=atmospheric pressure <br /> n varies from 0.5 to 1.0 and is <br /> selected in an iterative manner based on the I <br /> resulting Ic + <br /> FC=1.75(le")-3.7 <br /> FC Apparent fines content(%) FC=100 for lc>3.5 3 <br /> FC=O for Ic< 1.26 <br /> FC=5%if 1.64<Ic<2.6 AND F,<0.5 <br /> Ic<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 Ic parameter(valid for zones 2 through 7 on SBTn 2.05<Ic<2,60 Zone=5 3 <br /> ' chart) 2.60<lc<2.95 Zone=4 <br /> S <br /> 2.95<Ic<160 Zone=3 <br /> Ic>3.60 Zone=2 i <br /> Friction Angle determined from one of the following user 5 <br /> k. selectable options: <br /> PHI <br /> a) Campanella and Robertson See reference 5 <br /> b) Durgunoglu and Mitchel <br /> c) Janbu <br /> Relative Density determined from one of the following user <br /> F` selectable options: <br /> f <br />€ Dr a)Ticino Sand See reference 5 <br /> E b) Hokksund Sand <br /> f c)Schmertmann 1976 <br /> I d)Jamiolkowski-All Sands <br /> a)Based an Schmertmann's method involving a <br /> plot of S„l6, 1(Sdc;y')Nc and OCR <br /> t <br /> OCR Over Consolidation Ratio—2 methods available b)Based on qt 6 ro 5 <br /> OC!{=K• <br /> where an average value of k=0.3 is used <br /> State The state parameter is used to describe whether a soil 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 Been and Jefferies <br /> EGG <br /> 7 <br /> CPTSUMM-1.20C—Rev.02-07-31 , <br />