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1901-1919 N Fairview St - Soils Report
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1901-1919 N Fairview St - Soils Report
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Soils Report
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AREGG Cone Penetration Test Data & Interpretation <br />The Corie Penetration Test (CPT) data collected from your site are presented in graphical <br />form in the attached report. The plots include interpreted Soil Behavior Type (SBT) based on <br />the charts described by Robertson (1990). Typical plots display SBT based on the non- <br />normalized charts of Robertson et al (1986). For CPT soundings extending greater than 50 <br />feet, we recommend the use of the normalized charts of Robertson (1990) which can be <br />displayed as SBTn, upon request. The report also includes spreadsheet output of computer <br />calculations of basic interpretation in terms of SBT and SBTn and various geotechnical <br />parameters using current published correlations based on the comprehensive review by <br />Lunne, Robertson and Powell (1997), as well as recent updates by Professor Robertson. The <br />interpretations are presented only as a guide for geotechnical use and should be carefully <br />reviewed. Gregg Drilling & Testing Inc. do not warranty the correctness or the applicability of <br />any of the geotechnical parameters interpreted by the software and do not assume any <br />liability for any use of the results in any design or review. The user should be fully aware of <br />the techniques and limitations of any method used in the software. <br />Some interpretation methods require input of the groundwater level to calculate vertical <br />effective stress. An estimate of the in-situ groundwater level has been made based on the <br />field observations and/or CPT results, but should be verified by the user. <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 />Note that it is not always possible to clearly identify a soil type based solely on *, 6, and u,· <br />In these situations, experience, judgment, and an assessment of the pore pressure <br />dissipation data should be used to infer the correct soil behavior type. <br />10- <br />1 <br />0.1 1 10 <br />(Alter Robertson, 1990) <br />Zone Normailzed Soil Behavior Type <br />1 .sensitive fine grained <br />2 /organic material <br />3 1 clay to silty clay <br />4 m clayey sit to silty clay <br />5 •silty sand to sandy silt <br />6 • clean sands to sitty sands <br />7 1 gravelly sand to sand <br />8 0 very stiff sand to clayey sand <br />9 very stiff fine grained <br />Normalized Friction Raoo (Fr) <br />Figure SBTn
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