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EGG Done Penetration Test Data & interpretation <br /> Soil behavior type and stratigraphic Interpretation is based on relationships between cone <br /> bearing (q,), sleeve friction (f), and pore water pressure (ua) The friction ratio (Rf) is a <br /> calculated parameter defined by 100flq, 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 /> e Low friction ratio (Rf) due to large cone bearing (q,) <br /> • Generate very little excess pore water pressures (ua) <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, 1950, 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 /> type <br /> ZO�EQVN SBT <br /> r12 Sensitive, fine greamed2organic materials <br /> ' <br /> 3 1 clay <br /> 100 8 _ <br /> ... 4 1 s silty clay to clams <br /> +� 5 2 Cfa+fey silt to sdcl�� <br /> 5 Sa!Ldy silt to ciao slit I <br /> 7 3 stl sand to sandy silt <br /> c <br /> 4 _ <br /> 4� I g Sand to sal sand <br /> 9 s Sand <br /> 10 5 Gravely sand to sand <br /> 11 1 Verystaff fine grained* <br /> • ` 12 2 Sand to clayey sand* <br /> *over consolidated or cemented <br /> i Q 1 2 3 4 5 a 7 a <br /> Fiction l�eija (%}, Rf <br /> Figure SBT <br />