Laserfiche WebLink
CPT Interpretations Page 517 <br /> Interpreted Equation Ref <br /> Parameter Description <br /> a)Based on Schmertmann s method involving a <br />' plot of 5u16v'1(S„la,;)NG and OCR <br /> OCR Over Consolidation Ratio Plot <br /> where the Su/p'ratio for NC clay is user <br /> selectable <br /> State The state parameter is used to describe whether a sod is <br /> contractive(SP is positive)or dilative(SP is negative)at See reference 8, 6 5 <br /> 1 Parameter large strains based on the work by Been and Jeffenes <br /> ' <br /> Es/qt 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 Mean normal stress is evaluated from <br /> three types of sands considered in this technique The <br /> user selects the appropriate type for the site from <br /> 0-- = ( <br /> •Y3.+6 <br /> 1 a)OC Sands 3 <br /> A+6.� <br /> Youngs b)Aged NC Sands 5 <br /> Modulus E c)Recent NC Sands where 6v'=vertical effective stress <br /> 6h=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= K. a„ with Ko assumed to be 0 5 <br /> normal stress and linearly interpolates between the two <br /> extremes provided in Baldi s chart <br /> 1 � qc, — qc1=qt•(Pala,)"s �-- <br /> qi normalized for overburden stress used for seismic where Pa=atm Pressure 3 <br /> analysis <br /> qt is in Mpa <br /> ' qc,n — qc,n=(qc1 1 Pa)(Pala ) 3 <br /> qc, in dimensionless form used for seismic analysis where Pa=atm Pressure and n ranges from <br /> 0 5 to 0 75 based on Ic <br /> ' Kspr Equivalent clean sand factor for(N1)60 Ksar= 1 +((0 75/30) *(FC—5)) 10 <br /> ' Kwt= 10 for Ic<f 64 <br /> KcPr Equivalent clean sand correction for gr1N Kc#=f(I.)for Ic> 164 (see reference) 10 <br /> ' gc,ncs Clean sand equivalent gcln gcfn==Win•Kcpr 3 <br /> gclr=<50 <br /> ' CRR 5=0 833[(gclncs11000}+0 05 <br /> CRR Cyclic Resistance Ratio(for Magnitude 7 5) 10 <br /> 50<gc,nes< 160 <br /> CRR7 5= 93[(q_1"a,00013+0 08 <br /> ' CSR=(Tav16v)=0 65(ami 19)(6v1 6v)rd <br /> rd=1 0—0 00765 z z 5 915m 10 <br /> ' <br /> rCSCyclic Stress Ratio rd=1 174—0 0267 z 9 15 <z _< 23m <br /> rd=0 744—0 008 z 23 < z 5 30m <br /> rd=0 50 z > 30m <br /> CONE-EEC <br /> CPTSUMM-MethodsV122a—Rev 06-30-2004 ®� <br /> 1 <br />