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Geotechnical Engineering

 

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

GTR Review Checklist for Site Investigation

A. Site Investigation Information

Since the most important step in the geotechnical design process is to conduct an adequate site investigation, presentation of the subsurface information in the geotechnical report and on the plans deserves careful attention.

Geotechnical Report Text
 (Introduction) (Pgs. 10-1 to 10-4)
  1. Is the general location of the investigation described and/or a vicinity map included?

        (Yes   /   No   /   Unknown or N/A)

  2. Is scope and purpose of the investigation summarized?

        (Yes   /   No   /   Unknown or N/A)

  3. Is concise description given of geologic setting and topography of area?

        (Yes   /   No   /   Unknown or N/A)

  4. Are the field explorations and laboratory tests on which the report is based listed?

        (Yes   /   No   /   Unknown or N/A)

  5. Is the general description of subsurface soil, rock, and groundwater conditions given?

        (Yes   /   No   /   Unknown or N/A)

  6. *Is the following information included with the geotechnical report (typically included in the report appendices):

    1. Test hole logs? (Pgs. 2-24 to 2-32)

          (Yes   /   No   /   Unknown or N/A)

    2. Field test data?

          (Yes   /   No   /   Unknown or N/A)

    3. Laboratory test data? (Pgs. 4-22 to 4-23)

          (Yes   /   No   /   Unknown or N/A)

    4. Photographs (if pertinent)?

          (Yes   /   No   /   Unknown or N/A)

Plan and Subsurface Profile
(Pgs. 2-19, 3-9 to 3-12, 10-13)
  1. * Is a plan and subsurface profile of the investigation site provided?

        (Yes   /   No   /   Unknown or N/A)

  2. Are the field explorations located on the plan view?

        (Yes   /   No   /   Unknown or N/A)

  3. *Does the conducted site investigation meet minimum criteria outlined in Table 2?

        (Yes   /   No   /   Unknown or N/A)

  4. Are the explorations plotted and correctly numbered on the profile at their true elevation and location?

        (Yes   /   No   /   Unknown or N/A)

  5. Does the subsurface profile contain a word description and/or graphic depiction of soil and rock types?

        (Yes   /   No   /   Unknown or N/A)

  6. Are groundwater levels and date measured shown on the subsurface profile?

        (Yes   /   No   /   Unknown or N/A)

Subsurface Profile or Field Boring Log
 (Pgs. 2-14, 2-15, 2-24 to 2-31)
  1. Are sample types and depths recorded?

        (Yes   /   No   /   Unknown or N/A)

  2. *Are SPT blow count, percent core recovery, and RQD values shown?

        (Yes   /   No   /   Unknown or N/A)

  3. If cone penetration tests were made, are plots of cone resistance and friction ratio shown with depth?

        (Yes   /   No   /   Unknown or N/A)

Laboratory Test Data
(Pgs. 4-6, 4-22, 4-23)
  1. *Were lab soil classification tests such as natural moisture content, gradation, Atterberg limits, performed on selected representative samples to verify field visual soil identification?

        (Yes   /   No   /   Unknown or N/A)

  2. Are laboratory test results such as shear strength (Pg. 4-14), consolidation (Pg. 4-9), etc., included and/or summarized?

        (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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