Laserfiche WebLink
-r <br /> CPT Interpretations <br /> Interpreted Description Equation Ref <br /> Parameter <br /> E.Stress <br /> -.. Cry Effective vertical overburden stress at Mid Layer Depth Estress=Tsfress-uoq <br /> For hydrostatic option: <br /> Equilibrium pore pressure determined from one of the <br /> following user selectable options: U.,=r,•(D-D.) <br /> Ueq where u,q is equilibrium pore pressure <br /> 1) hydrostatic from water table depth yW is unit weight of water <br /> 2) user supplied profile D is the current depth <br /> D,,,,,is the depth to the water table <br /> Cn=fa,)-os <br /> Cn SPT Nee overburden correction factor where o-, is in tsf <br /> 0.5<C„<2.0 <br /> SPT N value at 60%energy calculated from qVN ratios <br /> Neo assigned to each SBT zone. This method has abrupt N See Figure 1 4. 5 <br /> value changes at zone boundaries. <br /> SPTN Value at 60%energy. This method is a slight <br /> modification of the Jefferies and Davies technique . <br /> Neo(lc) whereby the gt1N ratio varies across soil classification See Figure 1 5,8 <br /> zones based on the Ic parameter. This techniques is <br /> limited to zones 2 through 7 on the normalized Soil <br /> Behavior Type Chart <br /> (Nt)eo I SPT Neo value corrected for overburden pressure (N,)w=Cn.Neo I 4 <br /> A(Ni)so= Ksrr .(NOsa <br /> 1—Ksrr <br /> Where: KsaT is defined as: <br /> o(Ni)eo Equivalent Clean Sand Correction to(Ni)so 4 <br /> 0.0 for FC<5% <br /> 0.0167•(FC-5) for 5%<FC<35% <br /> 0.5 for FC>35% <br /> FC-Fines Content in% <br /> (Nt)w. I Equivalent Clean Sand(Nl)eo (N1)w.=(N1)eo + Q(N1)eo 4 <br /> Su Undrained shear strength-Nit is user selectable Su=q N,:, I 1,5 <br /> k Coefficient of permeability(assigned to each SETT zone) 5 <br /> A. <br /> ,Oq= <br /> qt-sS <br /> Bq Pore pressure parameter where: Aa=U-rr 1,6 <br /> and u=dynamic porn pressure <br /> uoq=equilibrium pore pressure <br /> Q, INormalized qt for Soil Behavior Type classification as Q1=q1-Cr. 2,5 <br /> defined by Robertson, 1990 a <br /> Normalized Friction Ratio for Soil Behavior Type Fr=100%• fr i <br /> Fr classification as defined by Robertson, 1990 qt-Q, I 2,5 <br /> SBTn Normalized Soil Behavior Type as defined by Robertson See Figure 2 2,5 <br /> and Campanella <br /> i <br /> QREGG <br /> CpTSUMM-1.200-Rev. 02-07-31 <br />