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