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CPT Interpretations U Wt Unit Weight of sal determined from 1) unrfotn value or 2) value assigned to each SBT zone 3) user supplied unit weight profile TStress Total vert[cal overburden stress at mid layer depth _ Mress=E -- 1 where n is layer unit weight A is layer thickness EStress Effective vertical overburden stress at mui layer depth— �-- -- ES'tress=Mress—Ueq - — Ueq Equilibrium pore pressure determined from 1) hydrostatic from water table depth - 2) user suppled profile -- ---- - Cn SPT Noo overburden correction factor Cn={u)-0s where a„'is in tsf Neo SPT N value at 601Y.energy calculated from Qt/N ratios assigned to each 3 SBT zone (41)so I SPT Nee value corrected for overburden pressure - -- -- - N1eo=Cn•Ngo 3 Id(N1)ao i Equivalent Clean Sand Correction to(N1),o e(NI), = Kir • N1)-- 7 1.-Kir { co Where KISPT is defined as 0 0 for PC<5% . 00167•(PC-5) for 5%<PC<350/. 05 for FC>35% FC-Fines Content in% (M)80p Equivalent Clean Sand(N1)sa - (N1)eons=(N1)ea + p(N1)sa I 7- Su Undrained shear strength-Nkt is--use selectable Su=gr--Cr,- - - -- 2 Nw Coefficient of permeabillty(assigned to each 5BT zone) - - -- - v - -- 6- Bq I Pore pressure parameter -- ou Y 4- 2 - II _ Bq~Or-�, Qtn Normalized Qt for Sad Behavior Type classification a5 defined Robertson 1990 "- Rfn Normalized Rf for Sod Behavior Type classificatioti as defined by • fs a Robertson, 1990 � 100°/a Qt-av S&n Normalized Soil Behavior Type(slightly mcddied from that pubE>shed by 4- -Robertson,1990 This version includes all the soil zones of the original non-normalized SBT chart-see figura 1) Qct Normalized Qt for seismic analysis qct =qo•(Paky,'a s - _ 5 where Pa=atm pressure Qc1N Dimensionless Normalized Qt1 - - gciN=qci/P-a - where Pa=atm pressure CONETEC --- — -