Drilled Shaft Foundation Design Reporting

Include the following information on geotechnical design reports for drilled shaft foundation design:
  • Geotechnical Data Report and Borings (see Chapter 4)
  • Summary of proposed construction, factored foundation loads, applicable limit states, performance criteria (settlements, lateral deformation)
  • Scour and hydraulic assumptions
  • Applicable site constraints such as any suspected environmental restrictions, utility conflicts, adjacent structures, or limitations on construction (ROW, headroom, etc.)
  • Summary of soil and bedrock and IGM parameters and design analysis
  • Recommendations for ground improvement to increase bearing resistance and reduce settlement (if needed)
  • Description of design procedures with summary of results and explanation of interpretation, particularly:
  • Shaft tip elevations or estimated lengths
  • Assumptions on casing
  • Nominal geotechnical resistances and resistance determination method
  • Corrosion effects or chemical/biological attack susceptibility
  • Specified integrity and/or load testing requirements
  • Expanded analysis preformed such as drawdown with neutral plane axis, settlement estimates, and lateral load resistance and deformation.
  • Construction recommendations and recommendations for notes required on contract drawings/plans
  • Signed and sealed by the Engineer