Accession Number : ADA114305

Title :   Study to Investigate the Effects of Skin Friction on the Performance of Drilled Shafts in Cohesive Soils. Volumes I, II, III.

Descriptive Note : Final rept. Dec 78-Aug 81,


Personal Author(s) : Audibert,J ; Aggarwal,D ; Gardner,W ; Singh,R ; Baker,G

PDF Url : ADA114305

Report Date : Mar 1982

Pagination or Media Count : 368

Abstract : The general objective of this study was to investigate the effects of skin friction on performance of drilled shafts in cohesive soils. The investigation was conducted and discussed here in three stages: field, laboratory, and theoretical analyses. Four test shafts were constructed in 1969 at a test site located in southeastern Houston, Texas, where detailed subsurface exploration and soil characterizations had been made. Load tests on the carefully instrumented test shafts produced high-quality data documented in a series of reports made available to the public. For this study, a thorough subsurface investigation was performed to provide a detailed evaluation of the soil and groundwater conditions existing at the test site. Representative samples of the subsoils were obtained for laboratory analyses. Pressuremeter tests, borehole shear tests and static cone penetrometer soundings were also conducted. The geotechnical laboratory investigation was conducted to provide a characterization of the in-situ soil properties and parameters as well as their state-of-stress. Tests to investigate the pertinent physical and index properties of representative soil samples were conducted. Various methods of evaluating the ultimate shaft friction of drilled shafts in cohesive soils were described and assessed.

Descriptors :   *Boreholes, *Skin friction, Soils, Field tests, Pressure, Shear strength, Ground water, Pore pressure, Stresses, Penetration, Laboratory tests, Deformation

Subject Categories : Soil Mechanics
      Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE