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CPT lr terpretations Page SCI <br /> Interpreted Description Equation Ref <br /> Parameter <br />' a)Based on Schmertmann's method involving a <br /> plot of S. A S„!cr,,) c and OCR <br /> OCR Over Consolidation Ratio 9 <br /> where the Su/p roo for NC day is user <br /> selectable <br /> State The state parameter is used to describe whether a soil is <br /> contractive(SP is positive)or dilative(SP Is negative)at See reference <br />' Parameter large strains based on the work by Been and Jefferies - - <br /> Es/gt intermediate parameter for calculating Youngs Modulus, Based an 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 Balch 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 /> a)OC sands a` =3 {'"• "{a'+aJ <br />' Youngs h)Aged NC Sands 5 <br /> Modulus E c)Recent NC Sands where a,;=vank al effective stress <br /> aW=horizontal effective stress <br /> Each sand type has a family of curves that depend on <br /> mean normal stress The programs calculates mean and an- Ko'av with Ko assumed to be 0 5 <br /> norm' <br /> extremes <br /> stress and linearly's ch orates between the two <br /> extremes provided In f3aldi's chart. <br /> qci _ normalized for overburden stress used for seismic qct `gi'(Pa/i3.)" <br /> analysis <br /> where Pa- ensure— S <br /> cit Is inn Mpa Mpa <br /> gctn — cion=(qci/Pa)(Pa/00 <br /> - qoi in dimensionless form used for seismic analysis where Pa.atm Pressure and n ranges from 3 -- <br /> 0 5 to 0 75 based on lc <br /> KsPr Equivalent dean sand factor for(Ni)60 KspT=f+((0 75130)'(FC-5)) 10 <br /> KcPT Equivalent clean sand correction for qct N K,4x=10,1 for!.>164 (see refermice) 10 <br /> Cler" Clean sand equivalent qoi 4cinn-%in•Kc# 3 <br /> CRRT s-0 833[(get nd1000]+0 05 <br /> CRR Cyclic Resistance Ratio(for Magnitude 7 5) 5o S Qctno<160 10 <br />' GRRr s- 93 Ucki n=11000]3+0 08 <br /> CSR-(TmWMj=0 65(amax 1 g)(6v/GO rd <br />' rd-10-0 00765 z z S 915m 10 <br /> GSR Cyclic Stress Ratio rd-1 174-0 0267 z 915 <z S 23m <br /> rd-0 744-0 008 z 23 < z S 30m <br /> fd-0.50 z > 30m <br /> GREGO <br />' CPTSLMAM-MethodsGV122a-Rev 08-10-2004 <br /> I <br />