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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

I. Ground Improvement Techniques

  1. For wick drains, are contractor submittals required that include proposed equipment and materials, method(s) for addressing obstructions, and method(s) for splicing wick drains.

        (Yes   /   No   /   Unknown or N/A)

  2. For lightweight fill, are minimum/maximum densities, gradation, lift thickness, and method of compaction specified?

        (Yes   /   No   /   Unknown or N/A)

  3. For vibro-compaction, are contractor submittals required that include proposed equipment and materials? Are methods of measurement and acceptance criteria specified?

        (Yes   /   No   /   Unknown or N/A)

  4. For dynamic compaction:

    1. If method specification is used, are the following specified: tamper mass and size; drop height, grid spacing; applied energy; number of phases or passes; site preparation requirements; subsequent surface compaction procedures?

          (Yes   /   No   /   Unknown or N/A)

    2. If performance specification is used, are the following specified: minimum soil property value to be achieved and method of measurement; maximum permissible settlement?

          (Yes   /   No   /   Unknown or N/A)

  5. For stone columns, are the following specified: site preparation, backfill materials, minimum equipment requirements, acceptance criteria and quality assurance procedures?

        (Yes   /   No   /   Unknown or N/A)

  6. For grouting, are contractor submittals required that include proposed equipment and materials. Are methods of measurement and acceptance criteria specified?

        (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
 

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United States Department of Transportation - Federal Highway Administration