Twining Consulting’s geotechnical consultants often work with project teams throughout the design and construction phases of new and existing structures, offering comprehensive services that result in sophisticated solutions. Twining Consulting’s Registered Geotechnical Engineers have extensive experience meeting the special needs of the Office of Statewide Health Planning and Development (OSHPD) and the Division of the State Architect (DSA). Our geotechnical division is well positioned to provide in-depth geotechnical services on complex or critical use facility projects by providing a broad range of services that include:

  • Preliminary geotechnical investigations, including small and large-diameter borings, cone penetrometer testing, and trenching
  • Grading observations
  • Field and laboratory testing of soils
  • Liquefaction analyses, including dynamic settlement estimates
  • Design of shallow and deep foundations systems, including driven piles, caissons, dense aggregate piers, and mat foundations
  • Slope stability and landslide analyses
  • Flexible and rigid pavement design
  • Design and analysis of retaining structures, including tie-backs and soil nails
  • Observation and testing during grading operations, foundation installation, subgrade preparation, and backfill
  • Asphalt placement inspection and field density testing
  • Geologic / seismicity studies and geologic hazard evaluation