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Drilled Shaft Design and Construction Part I

John C. Huang, Ph.D., PE

Once considered a specialty foundation for urban settings where vibrations could not be tolerated or where shallow foundations could not develop sufficient capacity, the use of drilled shafts as structural support have recently increased significantly due to heightened lateral strength requirements for bridge foundations and the ability of drilled shafts to resist such loads, especially enormous lateral loads from extreme event limit states often governing bridge foundation design, such as vessel impact loads. Drilled shaft construction is relatively unaffected by scour depth requirements and the tremendous lateral stiffness has made it the preferred foundation type for bridge foundations by many designers. Further, recent developments in design and construction methods of drilled shafts have provided considerably more economy to their use in all settings, including foundations for bridge piers, abutments, high mast lighting, cantilevered signs, cellular phone and communication towers. This course is entirely based on the US Department of Transportation Publication No. FHWA-NHI-10-016, Drilled Shafts: Construction Procedures and LRFD Design Methods. This two-part series discusses both construction and design of drilled shafts, and addresses the applications of drilled shafts for transportation structure foundations; general requirements for subsurface investigations; construction means and methods; LRFD principles and overall design process; geotechnical design of drilled shafts for axial and lateral loading; extreme events including scour and earthquake; LRFD structure design; field loading tests; construction specifications; inspection and records; non-destructive integrity tests; remediation of deficient shafts; and cost estimation.

This is part one of the series, covering drilled shaft construction.

This course includes a multiple-choice quiz at the end, which is designed to enhance the understanding of course materials.

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NY PE & PLS: You must choose courses that are technical in nature or related to matters of laws and ethics contributing to the health and welfare of the public. NY Board does not accept courses related to office management, risk management, leadership, marketing, accounting, financial planning, real estate, and basic CAD. Specific course topics that are on the borderline and are not acceptable by the NY Board have been noted under the course description on our website.