Laserfiche WebLink
' CPT Interpretations Page 617 <br /> Interpreted Description Equation Ref <br /> Parameter <br /> State The state fuer is used to describe whether a soil is <br /> Parameter Oontractive(SP is positive)or dilative(SP is negative)at large See reference <br /> strains based on the work by Been and Jefferies <br /> Es/qt Intermediate parameter for calculating Youngs Modulus,E,inBased on Figure 5 59 to the reference 5 <br /> sands It is the Y ams of the reference chart <br />' Youngs Modulus based on the work by Bald There are <br /> three types of sands considered in thus technique The user Mean normal stress is;evaluated horn <br /> selects the appropriate type for the site from <br /> l <br /> a)OC Sands •. =3 y+Cr.+Qh <br />' Youngs b)Aged NC Sands <br /> 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 nen <br />' normal stress The program calculates mean normal stress and ch= Ko'a„ with Ko assumed to be 0 5 <br /> and fineariy interpolates between the two extremes provided <br /> in Bak#'s chart <br />' •(Pala,?' <br /> q<nom>at¢ ss ed for overburden streused for seismic analysis Paattm_ Pressure 3 <br />' <br /> (� /� qr is in M pa gctt q.tR=(q.,,Pa)(Pa/6„) <br /> q.,in dimensionless form used for sewn=analysis where Pa=atm Pressure and n ranges from 3 <br /> 0 5 to 0 75 based on le <br /> Ksp7 Equivalent clean sand factor for(M)SO Ksvr=7+((0 75!30)•(FC—5)) 10 <br />' K,A=10 for 64 <br /> Kcpr Equivalent clean sand correction for qc,N Kat=47,)for f.>164 (see reference) 10 <br /> gc,na Clean sand equivalent q,,,, qn,.==q�,,,a Kat 3 <br /> q.j.a 50 <br /> CR R7 5=0 833((gc1„110001+0 05 <br /> CRR Cyclic Resistance Rabo(for Magnitude 7 5) 50 5 qc„.a 160, 10 <br /> CRR75= 93((q.Irm 1000f+0 08 <br /> CSR=(c,!e )=0 65(a,,,.,,/g)(ail a„')rd <br /> rd=10-000765z z __<915m 10 <br />' <br /> CSR Cyclic Stress Ratio re=1 174—0 0267 z 915 <z s 23m rd=0 744--0 008 z 23 < z s 30m <br /> rd=050 z > 30m <br />' MSF Magnitude Scaling Factor See Reference 10 <br />' FofS Factor of Safety against Liquefaction FS=(CRR7s/CSR)MSF 10 <br /> i <br /> CONE EC <br /> CPTSUMM-Methodsv122a—Rev 06-30-2004 <br />