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Geotechnical Engineering


Checklist and Guidelines for Review of Geotechnical
Reports and Preliminary Plans and Specifications

PS&E Review Checklist for Specific Features

H. Structure Foundations - Drilled Shafts

  1. *Where drilled shafts are to be placed in soil, is the specified bearing stratum in which the drilled shaft is to be found clearly described, e.g., placed on Br. Sandy GRAVEL deposit, etc.?

        (Yes   /   No   /   Unknown or N/A)

  2. Where end bearing drilled shafts are to be founded on rock, has the rock elevation at the shaft pier locations been determined form borings at the pier locations?

        (Yes   /   No   /   Unknown or N/A)

  3. Where drilled shafts are to be socketed some depth into rock, have rock cores been extracted at depths to 3 m (10 ft) below proposed socket at location within 3 m (10 ft) of the shaft?

        (Yes   /   No   /   Unknown or N/A)

  4. *Are shafts equipped with PVC access tubes to accommodate non-destructive testing (gamma/gamma logging, cross-hole sonic logging) of the shaft? Are provisions for the appropriate non-destructive testing methods included?

        (Yes   /   No   /   Unknown or N/A)

*A response other than (yes) or (N/A) for any of these checklist questions is cause to contact the appropriate geotechnical engineer for a clarification and/or to discuss the project.


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Updated: 04/07/2011

United States Department of Transportation - Federal Highway Administration