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I <br /> *EGG Cone Penetration Test Data & Interpretation <br />' Sod behavior type and stratigraphic Interpretation is based on relationships between cone <br /> bearing (q,), sleeve friction (Q, and pore water pressure (u2) The friction ratio (Rf) is a <br />' calculated parameter defined by 100f)qc and is used to infer sod behavior type. Generally <br /> Cohesive soils (clays) <br /> e High friction ratio (Rj) 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 />' • 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 1 Note that all penetration depths <br /> referenced in the data are with respect to the existing ground surface <br />' Soil 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,, fJ, 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 /> type <br /> ZONE Qt/N SBT <br /> 4. <br /> 11 1 2 sensitive, fine greatned <br /> 2 1 Organic materials <br /> � r t 3 1 Clay <br /> 100 '� ; 4 1 5 Siltyda to cia <br /> �7 <br /> °° /' f 5 Z Clayey silt to sli da <br /> 6 2 5 Sand slit to clayey silt <br /> f 7 3 Silty sand to s4ndy silt <br />' 10 8 4 Sand to silty sand <br /> 9 5 Sand <br />' 10 6 Gravel sand to sand <br /> 11 1 ; verystiff fine rained* <br /> 12 2 0 Sand to clayey sand* <br /> *over consolidated or cemented <br /> Wam RIW (%I Rf <br /> Figure 5BT <br />