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Use of Geophysics for Transportation Projects (2006) / Chapter Skim
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Pages 7-11

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From page 7...
... Material properties can be measured indirectly through the use of engineering geophysical methods such as seismic, electrical resistivity, EM and ground penetrating radar (GPR) , to name only a few.
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From page 8...
... studies; • Identify the techniques associated with each geophysical method; • Define general applications for the techniques as used for geotechnical investigations; and • Present existing standard test methods and guides used for geophysical investigations. Methods Numerous publications were prepared for the three aforementioned FHWA International Conferences.
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From page 9...
... Ti m e– D om ai n EM (m eta l d ete cto r) Ti m e D om ai n EM S ou n di ng s El ec tri ca l R es ist iv ity In du ce d Po la riz at io n G ra vi ty M ag n et ic s G ro u n d Pe n et ra tin g R ad ar Investigation Objectives Bedrock depth P P P P S S SS Rippability P P P Lateral and vertical variation in rock or soil strength P P P P P Location of faults and fracture zones S P P S S S S S S S S Karst features S P P S P P Near-surface anomalous conditions S P P S P Soil characterization and lithology S S S P P S P P Locating landfill boundaries, waste pits, waste trenches, buried drums S P P P P P P Water table S S P P P Water quality, fresh-saline water interfaces P P P S Notes: This matrix is intended to aid in the selection of an appropriate geophysical method and respective technique for typical geotechnical investigation objectives.
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From page 10...
... Metal Detectors Ground Penetrating Radar (GPR) Gravity Seismic Reflection In press Mechanical Caliper–Borehole Logging Gamma–Borehole Logging Electromagnetic Induction Neutron–Borehole Logging Geophysical Methods and Techniques ASTM Standard*
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From page 11...
... Most people are not aware that ASTM Guides and Standards are available for geophysical testing. ASTM D6429 serves the industry as a guide for selection of appropriate geophysical methods based on objectives and setting.
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Key Terms

  • applied geophysics
  • geotechnical engineer
  • seismic testing
  • transportation research
  • crosshole seismic

  • fracture zone
  • domain electromagnetic
  • seismic refraction
  • seismic reflection
  • ternational conference

  • nchrp synthesis
  • borehole logging
  • geophysical methods
  • site condition
  • surface waves

  • water table
  • seismic method
  • magnetic method
  • fracture zones
  • surface wave

  • geophysical testing
  • national conference
  • common geophysical
  • ground penetrating
  • penetrating radar

  • tional conference
  • standard guide
  • geophysical method
  • site conditions
  • geophysical test


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