Drilled shaft bridge foundation design parameters and procedures for bearing in SGC soils.

Final report.PDFTech ReportFHWA-AZ-06-493SPR-493 SPR-PL-1(57) 493DrillingAxial loadsSkin frictionEnd bearing pilesDilationSoilsFoundation soilsBridge foundationsArizonaArizona. Dept. of Transportation. Research CenterHouston, William N.Harraz, Abdalla M.Walsh, Kenneth D.Houston, Sandra L.Perry, CourtlandArizona State UniversityArizona. Dept. of TransportationUnited States. Federal Highway AdministrationNTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and StructuresNTL-HIGHWAY/ROAD TRANSPORTATION-Soils and GeologyUS Transportation CollectionThis report provides a simplified method to be used for evaluating the skin friction and tip resistance ofaxially loaded drilled shafts. A summary of literature and current practice was completed and then acomprehensive set of field and laboratory tests was performed. Several soil samples were collectedfrom different sites from Arizona and surrounding states. Large scale direct shear apparatus wasdeveloped and used to determine the friction between soil and concrete. Finite element analyses wereconducted on several prototype cases to determine effect of soil parameters such as dilation on the skinfriction values. A step-by-step simplified approach was introduced to determine the skin and tipresistance of drilled shaft foundations in gravelly soils. An example application was presented to guideusers in utilizing the simplified approach