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CPT InterpretationsPage 517 <br /> r Interpreted Description Equation Ref <br /> Parameter <br /> (� a}Based an Schmertmann's method involving a <br /> plot of S,W/(S,la,;)Nc and OCR <br /> OCR Over Consolidation Ratio 9 <br /> where the Su/p'ratio for NC clay is user <br /> selectable <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 B,fi,5 <br /> large strains based on the work by Been and Jefferies <br /> Intermediate parameter for calculating Youngs Modulus, <br /> Eslgt E,in sands_ It is the Y axis of the reference chart. Based on Figure 5.59 in the reference 5 <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 /> 1 <br /> a)OC Sands a_ =3��"+�`+Qi <br /> Youngs b)Aged NC Sands 5 <br /> Modulus E c)Recent NC Sands where a,;=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 /> qct q<normalized for overburden stress used for seismic qet =c#•(Pa(6°)" 3 <br /> . . analysis where: Pa s atm.Pressure <br /> q,is in Mpa <br /> goln ficin=(qct/Pa)(Pa/4') <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 /> Kspr Equivalent dean sand factor for(NI)60 Ks-=1 t((0.75/30)'(FC-5)) 10 <br /> K,p=1.0 for 1sS1.64 <br /> KcpT Equivalent clean sand erection for q0N Kq t=f(le)for 1e> 1.54 (see referews) 10 <br /> gclm Clean sand equivalent gctn gcfne,=q'cin I Kept 3 <br /> gctn <50: <br /> CRRT.s a 0.833[(qct ncdl0001+0.05 <br /> CRR Cyclic Resistance Raffia(for Magnitude 7.5) 10 <br /> 50 5 qct ma<160: <br /> CRR7s- 93 Rclonce/1000V+0.08 <br /> CSR- -0-65(amax/g)(ad ar')rd <br /> rd=1.0—0.00765 z z S 915m 10 <br /> CSR Cyclic Stress Ratio rd=1.174--0.0267 z 9.15 <z S 23m <br /> rd=0,744—0.008 z 23 < z S 30m <br /> rd=0-50 z > 30m <br /> GRIEGG <br /> CPTSLIMM-MethodsGV122a-Rev.08-10-2004 �° <br />