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CPT Interpretations <br /> Interpreted Description Equation I Ref <br /> • Parameter <br /> q`t qt normalized for overburden stress used for seismic qc, =qt*(Palav)�$ 3 <br /> where Pa=atm Pressure <br /> analysis qt is in MPa <br /> q., in dimensionless form used for seismic analysis where Pa=atm pressure <br /> --___ __- __--_-�_— -----.- ------ 14= 10 for!c 51 64 <br /> Kc Equivalent clean sand correction for qct N Kc=f(1c)for Ic> 1 64 (see reference) 3 <br /> F4= 1 0for 1 64</c<236and Fc<05% <br /> — gc,Nce Clean Sand equivalent qc,N - — gc,nic+=qc,N•Kc 3 <br /> -- — Ic=H3 47-log,oQ)2+(log,0 Fr+ 1 22)2 f 5- <br /> Where Q=(qt-0-,P. (ffp�. <br /> h Soil index for estimating grain characteristics And Fr is in percent 3 8 <br /> Pa=atmospheric pressure <br /> PaZ=atmosphenc pressure <br /> n vanes from 0 5 to 10 and is <br /> selected to an iterative manner based on the <br /> FC=1 75(1c325)_3 7 <br /> FC=100 for Ic>3 5 3 <br /> FC Apparent fines content(%} FC=O for Ic< 1 26 <br /> FC=5%if164<Ic<26ANDFr<05 <br /> Ic<1 31 Zone=7 <br /> 1 31 <lc<205 Zone=6 <br /> This parameter is the Sod Behavior Type zone based on 2 05<Ic<2 go Zone=5 <br /> IC Zone the Ic parameter(valid for zones 2 through 7 on St3Tn 2 60<Ic<2 95 Zone=4 3 <br /> chart) 2 95< Ic<3 60 Zone=3 <br /> lc>360 Zone=2 <br /> Fnetion 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 /> T a)Based on Schmertmann s method involving a <br /> plot of Sjav'/(S./a,')Nc and OCR <br /> OCR Over Consolidation Ratio-2 methods available b)Based on - 5 <br /> OCR=K•�qt rr, <br /> 6 <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 /> contractive(SP is positive)or dilative(SP is negative)at See reference 9 7 <br /> Parameter large strains based on the work by Been and Jefferies <br /> w <br /> GG <br /> CPTSUMM-1 20C-Rev 02-07-31 � <br />