ARCHIVED REPORTS_XR0008983 - Laserfiche WebLink

Home Browse Search

i CPT Interpretations ' U Wt Unit Weight of sol determined from 1) uniform value or 2) value assigned to each SBT zone - 3) user supplied unit weight profile TStress Total vertical overburden stress at mid layer depth - TStress= y,k I _ _ where n;s layer unci weight h,is layer thickness EStress Effective vertical overburden stress at mid laye depth - - ESlress=TStress�-Ueq� -- Ueq Equilibrium pore pressure determine-!from 1) hydrostatic from water table depth 2) user supplied profile Cn SPT No overburden correction factor where Q'rs in tsf 05<C,<2-0 - Neo SPT N value at 60%energy calculated from Qt/N ratios assigned to each 3 SBT zone - (N 1)8o SFT No value corrected for overburden pressure Nfao=Cn.Nso 3 A(N1)go Equivalent Clean Sand Correction to(N1)Bo A(NI). = Ksrr (Nl). 7 1—Ksrr Where KEPT is defined as 0 0 for FC<5% 0 0157•(FC-5) for 5%<FC<35% ' . 05 for FC>35°/a FC-Fines Content in% (Nl)60. Equivalent Clean Sand(Ni)go - - - - I (N1)eg� (N1)eo + A(Ni)eo -- 7 Su Undrained shear strength-Nkt is use selectable Su=Qr-av 2 Nh k Coefficient of permeability(assigned to each SBT zone) f I S Bq Pore pressure parameterI _ Au I 2- II Aq Qt- Qtn Normalized Qt for Soil Behavior Type classification as defined by Qtr=Qr-�v 4 Robertson 1990 6 Rfn Normalized Rf for Soil Behavior Type classification as defined by Rfn=t00%• .fs 4- 1 Robertson, 1990 SBTn Normalized Sod Behavior Type(slightly modified from that published by 4 Robertson, 1990 This version includes all the sal zones of the original non-normalized SBT chart-see figure 1) Qct I Normalized Qt for seismic analysis qci =qc.(Pal6„)o s I 5 4 where Pa=atm pressure Qc1N 4 Dimensionless Normalized Qt1 qct N=qc7/Pa where Pa=atm pressure I --____-- CONEEC 1 �T I