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Site Characterization of Atlantic Coastal Plain Deposits in Savannah, Georgia
In situ exploration techniques such as cone penetration testing (CPT) and flat blade dilatometer testing (DMT) have become ever more popular tools for geotechnical site characterization in the Southeast United States, especially for sites along the coast where soft soils are the most prevalent deposits. In addition to being used for developing subsurface profiles, in situ testing is also utilized to obtain engineering parameters such as strength and compressibility to evaluate foundation options and perform foundation design. These engineering parameters are typically obtained based on correlations with directly measured parameters such as CPT tip resistance and DMT pressures. Based on a comprehensive geotechnical study for a large energy project in Savannah, Georgia, this paper presents comparison of standard penetration test (SPT) N60 from SPT borings, CPT, and DMT soundings. We also compared soil strength and compressibility parameters obtained from correlations with CPT and DMT with laboratory testing. Our study indicated that the CPT tended to underestimate the equivalent N60 in over-consolidated clayey soils but can estimate the strength parameters better than the SPT and DMT. For soil compressibility, the constrained modulus predicted by the Robertson method matched the laboratory testing results better than the predictions given by Kulhawy and Mayne.
Site Characterization of Atlantic Coastal Plain Deposits in Savannah, Georgia
In situ exploration techniques such as cone penetration testing (CPT) and flat blade dilatometer testing (DMT) have become ever more popular tools for geotechnical site characterization in the Southeast United States, especially for sites along the coast where soft soils are the most prevalent deposits. In addition to being used for developing subsurface profiles, in situ testing is also utilized to obtain engineering parameters such as strength and compressibility to evaluate foundation options and perform foundation design. These engineering parameters are typically obtained based on correlations with directly measured parameters such as CPT tip resistance and DMT pressures. Based on a comprehensive geotechnical study for a large energy project in Savannah, Georgia, this paper presents comparison of standard penetration test (SPT) N60 from SPT borings, CPT, and DMT soundings. We also compared soil strength and compressibility parameters obtained from correlations with CPT and DMT with laboratory testing. Our study indicated that the CPT tended to underestimate the equivalent N60 in over-consolidated clayey soils but can estimate the strength parameters better than the SPT and DMT. For soil compressibility, the constrained modulus predicted by the Robertson method matched the laboratory testing results better than the predictions given by Kulhawy and Mayne.
Site Characterization of Atlantic Coastal Plain Deposits in Savannah, Georgia
Lin, Cheng (author) / Lin, Guoming (author) / Li, Zengxuan (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 427-438
2014-02-24
Conference paper
Electronic Resource
English
Site Characterization of Atlantic Coastal Plain Deposits in Savannah, Georgia
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