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i <br /> E�� Cone Penetration Test Data & interpretation <br /> Soil behavior type and stratigraphic Interpretation is based on relationships between cone <br /> bearing (g,), sleeve friction (f), and pore water pressure (u2) The friction ratio (Rf) is a <br /> I calculated parameter defined by 100f1gr and is used to infer soil behavior type Generally <br /> Cohesive soils (clays) <br /> • High friction ratio (Rf) due to small cone bearing (q�) <br /> • Generate large excess pore water pressures (u2) <br /> Cohesionless soils (sands) <br /> • Low friction ratio (Rf) due to large cone bearing (q,) <br />' O Generate very little excess pore water pressures (u2) <br /> A complete set of baseline readings are taken prior to and at the completion of each <br />' sounding to determine temperature shifts and any zero load offsets Corrections for <br /> temperature shifts and zero load offsets can be extremely important, especially when the <br /> recorded loads are relatively small In sandy soils, however, these corrections are generally <br />' negligible <br /> The cone penetration test data collected from your site is presented in graphical form in <br />' Appendix CPT The data includes CPT logs of measured soil parameters, computer <br /> calculations of interpreted soil behavior types (SBT), and additional geotechnical parameters <br /> A summary of locations and depths is available in Table 'I Note that all penetration depths <br /> referenced in the data are with respect to the existing ground surface <br /> Sod interpretation for this project was conducted using recent correlations developed by <br /> Robertson et al, 1990, Figure SBT Note that it is not always possible to clearly identify a soil <br /> type based solely on q,, f, and u2 In these situations, experience, judgment, and an <br />' assessment of the pore pressure dissipation data should be used to infer the soil behavior <br /> tyle <br /> '�' ScriStLlve line rained <br /> 2 l Organic matk pals <br /> 3 1 Cla <br /> � t� d 1 5 Siltyclay to cla <br /> 9OEfy� 4y 5 2 F Clayey(layey Silt to silty clay <br /> 6 25 -Sandy silt t0LlaYCY silt <br /> 1 7 2 Silty sand to sandy silt <br /> B S 4 Sand to silty sand <br /> 5 r 9 5 Sand <br /> 10 6 ,.:,C,ravel sand to sand <br />' 0 <br /> it 1 Very st�ft'lint grained* <br /> 12 2 Sand to cia ey sand* <br /> *over consolidated or Lemented <br /> 1 <br /> 0 1 2 9 4 3 8 T E <br />' fthon ROW Figure 587- <br />