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CPT Interpretations Page 417 <br /> ' Interpreted <br /> Parameter Description Equation Ref <br /> Bq= du <br /> ' 4r-6v <br /> Bq Pore pressure parameter where Qu=u-u,, 1,5 <br /> and u=dynamic pore pressure <br /> ' u q=equllibnum pore pressure <br /> Normalized q,for Soil Behavior Type classification as lE )I=qt- T� 2 5 <br /> Qt defined by Robertson, 1990 I Cr <br /> ' Normalized Friction Ratio for Sod Behavior Type Fr=1000/0+ fs <br /> Fr I classification as defined by Robertson, 1990 qt-0% I 2,5 <br /> SBTn I Normalized Sod Behavior Type as defined by Robertson I See Figure 2 2,5 <br /> ' and Campanella <br /> SBT-BQ Non-normalized sod behavior type based on the Bq I See Figure 5 7(reference 5) 2.5 <br /> parameter <br /> ' SBT-BQn I ormalizeSoil Behavior on q parameter Nd SBehbthe Bq See Figure 5 8(reference 5)or Figure 3 2,5 <br /> 1 � (reference 2) <br /> /c=I(3 47-log,oQ)Z+(log7o Fr+ 12 <br /> 2)z ro s <br /> ' Where -(7Q=(ql <br /> Pa2 <br /> ' <br /> 11 Soil index for estimating grain characteristics And Fr is in percent 3,8 <br /> Pa=atmospheric pressure <br /> Paz=atmospheric pressure <br /> n vanes from 0 5 to 1 0 and is <br /> ' selected in an iterative manner based on the <br /> resulting 1. <br /> FC=1 75(163 25)-3 7 <br /> FC Apparent fines content(%) FC=100 for!c>3 5 3 <br />' FC=O for lc< 126 <br /> FC=5%if 164<!c<2 6 AND F,<O 5 <br /> Ic< 131 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 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 Angie determined from one of the following user <br /> 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 /> selectable options <br /> Dr a)Ticino Sand See reference 5 <br />' b) Hokksund Sand <br /> c)Schmertmann 1976 <br /> d)Jamiolkowski-All Sands <br /> 1 <br /> CONE EC <br /> tCPTSUMM-MethodsV122a-Rev 06-30-2004 <br />