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' CPT Interpretations Page 517 <br /> Interpreted <br /> Parameter Description Equation Ref <br /> a)Based on Schmertmann's method involving a <br />' plot of S„lav I(S,Jav)Nc and OCR <br /> OCR Over Consolidation Ratio 9 <br /> where the Su/p'ratio for NC clay is user <br /> selectable <br />' - The state parameter is used to describe whether a sod is <br /> Siete contractive(SP is positive)or dilative(SP is negative)at See reference B 6,5 <br /> Parameter large strains based on the work by Been and Jeffenes <br /> Eslgt Intermediate parameter for calculating Youngs Modulus, Based on Figure 5 59 in the reference 5 <br />' E, in sands It Is the Y axis of the reference chart <br />' Youngs Modulus based on the work by Baldi There are <br /> three types of sands considered in this technique The Mean normal stress is evaluated from <br /> user selects the appropriate type for the site from <br /> I <br /> a)OC Sands u- - 3° '+6"+c <br />' Youngs b)Aged NC Sands 5 <br /> Modulus E c)Recent NC Sands where av'=vertical effective stress <br /> ah'=horizontal effective stress <br /> Each sand type has a family of curves that depend on <br />' mean normal stress The program calculates mean and ah= Ko"av with Ko assumed to be 0 5 <br /> normal stress and linearly interpolates between the two <br /> extremes provided in Baldi's chart <br />' • qe1 qt normalized for overburden stress used for seismic qct=q[°(Pal(Y„')"5 <br /> analysis where Pa=atm Pressure 3 <br /> q[is in Mpa <br />' gcan grin=(qc1/Pa)(Pakry) <br /> qct in dimensionless form used for seismic analysis where Pa=atm Pressure and n ranges from 3 <br /> 0 5 to 0 75 based on Ic <br /> IKsPr Equivalent clean sand factor for(N1)60 KspT=1 +((0 75130) '(FC-5)) 10 <br /> K,#=10 for/,51 64 <br /> KcPr Equivalent clean sand correction for gc1N KW=f(I j for lc> 164 (see reverence) 10 <br /> gctncs Clean sand equivalent gcln gclm;s=4cao°Kcpr 3 <br /> qcincs<50 <br />' CRR 5=0 833[(gclncs/l0001+0 05 <br /> CRR Cyclic Resistance Ratio(for Magnitude 7 5) 10 <br /> 50.s-gclnca<160 <br /> CRR7 5= 93[(qc1 rr/100013+0 08 <br /> CSR=(Tew/av')=0 65(affm/g)((jvl 6v)rd <br /> rd=10-0 00765 z z S 915m 10 <br /> Ile <br /> CSR Cyclic Stress Ratio rd= 1 174-0 0267 z 9 15 <z s 23m <br /> rd=0 744-0 008 z 23 a z S 30m <br /> — -- -^ -^ rd=0 50 z > 30m <br /> CONE EC <br /> CPTSUMM-MethodsV122a—Rev 06-30-2004 <br />