Geotechnical Services

GTI is prepared to meet all your engineering needs by performing high quality work in a timely and cost effective manner, specific to your projects needs. These services, available to our clients throughout the United States and internationally.

Services include, but are not limited to the following:

  • Foundations
  • Pavements
  • Retaining Structures
  • Groundwater
  • Non-Destructive Testing
  • Field Exploration & Monitoring
  • Transportation
  • Earthquake Engineering
  • Soil Stabilization
  • Geotechnical Construction
  • Forensic Engineering
  • Stability Analysis
  • Soil Dynamics
  • Engineering Geology
  • Earth Dams & Levees
  • Waterfront Structures
  • Telecommunication Design & Engineering
  • Quality Control
With our highly experienced professional staff of engineers, geologists, scientists, and technicians, GTI can perform a wide range of geotechnical testing. Testing includes standard penetration testing, as well as undisturbed ring sampling, vane shear testing, and cone penetrometer testing. Additionally, GTI also performs rock coring, including RQD testing, nuclear and cross-hole seismic testing. GTI can provide a wide variety of equipment to meet your geotechnical needs including, but not limited to:
  • Truck Mounted Drill Rigs
  • All Terrain Drill Rigs
  • Barge Drill Rigs
  • Vane Shear Testing
  • Nuclear Soundings
  • Ground Penetrating Radar Testing
  • Cone Penetrometer Testing
  • Pressure Meter Testing
  • Backhoe & Trackhoe Equipment
  • Magnetometer Testing
  • Cross-Hole Sonic Logging
GTI is prepared to meet your geotechnical needs, by performing quality work within a timely and cost effective manner throughout the United States and internationally.

GTI’s experienced staff of engineers and geologists can perform Seismic Refraction Studies for difficult to reach and/or remote locations as a cost effective alternative to conventional drilling services. The seismic refraction method consists of measuring (at known points along the surface of the ground) the travel time of compressional waves generated by an impulsive energy source. The energy source utilized consists of a 12-pound sledgehammer, which is detected by 12 separate geophones, then amplified and recorded by a seismograph. Measurements of time and distance are recorded and plotted on a graph, from which the depth of various layers can be determined along with their individual velocities.

From the seismic wave velocities, GTI engineers can extrapolate geotechnical design parameters such as dry density, angle of internal friction and soil cohesion. This method is especially useful in archaeologically and environmentally sensitive areas. Widely utilized by the telecommunication industry for monopole and lattice tower foundation design in elevated, mountainous areas; this method is also eapplicable to custom home and commercial structure foundation design.

GTI is prepared to provide several geophysical, non-destructive testing services to suit sensitive and/or difficult subsurface exploration needs. GTI utilizes geophysical engineering for various foundation designs, site risk assessments, and site suitability studies. Whether designing a deep foundation system, determining depth to groundwater, or searching for earth fissures, the wide array of geophysical engineering services offered by GTI can meet your needs. These geophysical services offered by GTI include, but are not limited to:
  • Seismic Refraction Studies
  • Electromagnetic Soundings
  • Magnetometer
  • Ground Penetrating Radar
  • Nuclear Soundings
  • Pile Integrity Testing
  • Cross-Hole Sonic Logging

GTI is prepared to meet your geotechnical needs, by performing quality work within a timely and cost effective manner throughout the United States and internationally.

GTI’s full service laboratory is certified by AMRL, CCRL, AASHTO, the City of Phoenix and ADOT for various laboratory tests of soils, concrete, and asphalt. Laboratory testing services for geotechnical studies offered by GTI include, but are not limited to:
  • Atteberg Limits Testing
  • Grain Size Distribution Testing
  • Hydrometer Testing
  • In-Situ Dry Density Testing
  • Undisturbed and Remolded Swell Potential
  • Consolidation Testing
  • Standard and Modified Proctor
  • pH Determination
  • Corrosion Testing
  • Resistivity Testing
  • Sulfate/Chloride Testing
  • California Bearing Ratio Testing

GTI is prepared to meet your geotechnical needs, by performing quality work within a timely and cost effective manner throughout the United States and internationally.

In addition to our drilling services and geophysical surveys, GTI can provide many additional engineering services to meet your geotechnical needs. Services include, but are not limited to:

Percolation testing, as per state and local regulations, including testing for proposed and existing retention basins, dry wells, and for septic system design.

  • Trenching and test pit explorations
    (with backhoe/trackhoe equipment)
  • Hand augering and drilling
    (in confined and/or enclosed spaces)
  • Calcium Chloride Moisture Vapor Testing
  • Underwater pier investigation
  • Deep foundation load testing
  • Vibration Evaluation
  • Blast Damage Surveys
  • Failure Investigations
  • Liquefaction Potential Studies
  • Drilled Pier Integrity Tests
  • Manometer Surveys

GTI is prepared to meet your geotechnical needs, by performing quality work within a timely and cost effective manner throughout the United States and internationally.

Contact Us Today!

GTI is prepared to meet all your engineering needs by performing high quality work in a timely and cost effective manner, specific to your projects needs.

Call: (480) 659-6630

Contact Us Today!
Schedule An Inspection

Schedule an inspection:

GTI appreciates the opportunity to provide you with your testing needs. GTI will do everything in our power to meet your scheduling needs.

Schedule An Inspection
Request A Proposal

Request a proposal:

GTI appreciates the opportunity to provide a proposal on your upcoming project. GTI will prepare a formal proposal for your review within 24 hours of receipt.

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