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TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 258: Manual on Subsurface Investigations provides an update to the American Association of State Highway Transportation Officials (AASHTO) 1988 manual of the same name. This report reflects the changes in the approaches and methods used for geotechnical site characterization that the geotechnical community has developed and adopted in the past thirty years. The updated manual provides information and guidelines for planning and executing a geotechnical site investigation program. It may also be used to develop a ground model for planning, design, construction, and asset management phases of a project.

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Suggested Citation

National Academies of Sciences, Engineering, and Medicine. 2019. Manual on Subsurface Investigations. Washington, DC: The National Academies Press. https://doi.org/10.17226/25379.

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Publication Info

372 pages |  8.5 x 11 |  DOI: https://doi.org/10.17226/25379
Chapters skim
Front Matter i-xix
Chapter 1. Introduction 1-6
Chapter 2. Geotechnical Uncertainty and Risk 7-11
Chapter 3. Subsurface Investigation Processes 12-34
Chapter 4. Geophysical Investigations 35-65
Chapter 5. In Situ Testing of Soil and Rock 66-93
Chapter 6. Drilling and Sampling of Soil and Rock 94-116
Chapter 7. Hydrogeologic Characterization 117-129
Chapter 8. Laboratory Testing of Soil and Rock 130-163
Chapter 9. Evaluation of Soil Properties 164-205
Chapter 10. Evaluation of Rock Mass Properties 206-237
Chapter 11. Compiling, Reporting, and Presenting Geotechnical Information 238-250
Appendixes 251-352

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