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CPT Interpretations <br /> Interpreted Description Equation Ref <br /> Parameter <br /> q°, q.+ =qi. (Pa/6,�)o s <br /> qt normalized for overburden stress used for seismic where Pa=atm Pressure 3 <br /> analysis qt is in MPa <br /> qui in dimensionless form used for seismic analysis qc1N-qc' /Pa - —- -- 3 <br /> where Pa=atm pressure <br /> K�= 10 for/�s-164 <br /> K. Equivalent clean sand correction for gC1N K�=f(Ij for 1.> 164 (see reference) 3 <br /> Kc= 10 for 1 64<10<2 36 and Fc<0 5% <br /> gclNcs Clean Sand equivalent qciN 4ct <br /> nr°s=qcru� ,Kc--- 3 - <br /> equivalent <br /> - <br /> - - -- !c=I(3 47-log1oQ)Z+(logro Fr+ 1 22)2 f 5- — _ <br /> Where C �gi-C,f6a1„ <br /> h Soil index for estimating grain characteristics And Fr is in percent J 3, B <br /> Pa=atmospheric pressure <br /> P82=atmospheric pressure <br /> n vanes from 0 5 to 10 and is <br /> selected in an iterative manner based on the <br /> resulting 1, - <br /> FC=1 75(lc3 25)-3 7 <br /> FC Apparent fines content(%) FC=100 for Ic>3 5 3 <br /> FC=O for Ic< 126 <br /> FC=5%if164<Ic<26AND Fr<05 <br /> Ic< 131 Zone=7 <br /> • <br /> This parameter is the Soil Behavior Type zone based on 1 31 <Ic<2 05 Zone=6 <br /> is Zone the Ic parameter(valid for zones 2 through 7 on SBTn 205<Ic<260 Zone=S3 <br /> 2 60<Ic<2 95 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 Mitchel <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 Sdc;v /(Su/G,)Nr,and OCR <br /> OCR Over Consolidation Ratio-2 methods available b)Based on (gt- 1 5 <br /> • <br /> ocx=KJI <br /> Uv <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, 6 <br /> large strains based on the work by Been and Jefferies <br /> GREGG <br /> CPTSUMM-1 20C-Rev 02-07-31 <br />