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} <br /> CPT Interpretations <br /> Interpreted Description Equation Ref <br /> Parameter <br /> qct • v'0.5 <br /> �. qt normalized for overburden stress used for seismic qa1 -qt (Paf+3 ) 3 <br /> analysis where: Pa=atm. Pressure <br /> qt is in MPa <br /> qcIN <br /> q.1 in dimensionless form used for seismic analysis 1 3 <br /> where: -Pa=atm.pressure <br /> !C<= 1.0 for/,S 1.64 <br /> Kc Equivalent clean sand correction for gC1N K�=f(lc)for!c> 1.64 (see reference) 3 <br /> K,= 1.0 for 1.64</c<2.36andFc<0.5% <br /> gclNcs Clean Sand equivalent gc1N I gclhka=qc,N•Kc 3 <br /> !c=I(3.47-logloQ)z+(log,0 Fr+1.22)2 f <br /> Where: <br /> Q=� P,; <br /> i, Soil index for estimating grain characteristics And Fr is in percent 3. 8 <br /> P,=atmospheric pressure <br /> P.2=atmospheric pressure <br /> n varies from 0.5 to 1.0 and is <br /> selected in an iterative manner based on the <br /> resulting 1, <br /> FC=1.75(te2s)-3.7 <br /> FC Apparent fines content(%) FC=100 for lc>3.5 3 <br /> FC=O for!c< 1.26 <br /> FC=5%if 1.64<lc<2.6 AND Fr<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= <br /> 2.05<Ic<2. Zone=5 <br /> Ic Zone the Ic parameter(valid for zones 2 through 7 on SBTn 2.60<Ic<2.9595 Zona=4 3 <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) Durgunogiu 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)Schmertrnann 1976 <br /> d)Jamiolkowski-All Sands <br /> a)Based on Schmertmann's method involving a <br /> Plot of S,da,r'1(S„la, )Nc and OCR. <br /> OCR Over Consolidation Ratio-2 methods available b)Based on (i-cr! <br /> r-6.15 <br /> ocx=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 /> QREGG <br /> CPTSUMM-1.200-Rev.02-07-31 <br />