The proper groundwork must be completed before laying the foundation for any successful project. Our Geotechnical Engineering Specialists utilize advanced geotechnical drilling equipment and a full support staff of highly skilled technicians. Utilizing the latest design software to evaluate your site, we provide innovative, practical recommendations for support of all types of structures.

GFA specializes in foundation recommendations and geotechnical analysis including:

  • Shallow Foundations
  • Deep Foundations
    • Driven piles
    • Auger Cast Piles
    • Drilled Shafts
    • Micropiles
  • Soil Improvement Techniques
    • Demucking
    • Deep Dynamic Compaction
    • Vibroflotation
    • Vibroreplacement
  • Underpinning and Foundation Stabilization
    • Helical Piers
    • Pin Piles
    • Grout Injection
  • Beach Renourishment Quality Control
    • Turbidity Monitoring
    • Vibration Monitoring
    • Existing Building Structural Surveys
    • Laboratory Testing (for grain size)
    • Munsel Color
    • Carbonate Content

Sitework Monitoring and Earthwork Observation

GFA specializes in providing highly experienced geotechnical field technicians to oversee earthwork operations and soil improvement processes during the all stages of projects including:

  • Vibratory Compaction & Vibration Monitoring
  • Pile Installation & Load Tests
  • Pile Driving Analyzer (PDA)

Subsurface Exploration and Drilling

GFA owns and operates its own drilling equipment and support vehicles and can respond quickly to requests for subsurface soil sampling and installation of monitoring wells. Our drilling crews know auger and wash boring techniques. We are experienced in split barrel sampling and rock coring and utilize standard penetration tests to collect data in order for our soil engineers and geologists to determine the nature of subsurface soils and general geomorphic conditions.

GFA subsurface exploration and drilling services include:

  • Sinkhole Studies
  • Environmental Drilling
  • Rock Coring
  • Exfiltration Testing
  • Standard Penetration Testing

Geotechnical / Hydrogeological

  • Preliminary Site Reconnaissance
  • Subsurface Soil Investigations
  • Foundation Analysis & Recommendations
  • Pile Load Test
  • Plate Load Test
  • Seismic Monitoring

Geotechnical Drilling/Sampling

  • Monitoring Well Installation
  • Recovery Well Installation
  • Vacuum Extraction Well Installation
  • Auger Borings
  • Double Ring Infiltrometer Tests
  • Dynamic Cone Penetrometer Tests
  • Exfiltration Tests (FDOT and SFWMD)
  • Infiltration Tests (FDOT and SFWMD)
  • Muck Probes
  • Rock Cores
  • Split Spoon Sampling
  • Standard Penetration Tests
  • Static Cone Penetration Tests
  • Undisturbed Sampling of Soil (Shelby Tube/Split Spoon)
  • Vibracoring

Specialty Geotechnical Testing

  • Ground Penetrating Radar
  • Seismograph