Updating Florida Department of Transportation's (FDOT) Pile/Shaft Design Procedures Based on CPT & DTP Data

Fourteen pile design methodologies (Schmertmann, LCPC, etc.) using cone penetration test (CPT) results have been evaluated using the Load and Resistance Factor Design (LRFD) method. The resulting resistance factors were not satisfactory for any of the methods. Therefore, a new design method was proposed, taking into account cementation and spatial variability. The LRFD resistance factor was also assessed for this new method. This research also involved identifying cemented soils using dual tip penetrometer (DTP) since cementation is a critical issue in pile design procedures.

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