Geotechnical Engineering

TriState Planning Engineering & Land Surveying, P.C. offers a vast array of services for all your project’s Geotechnical Engineering needs. Our staff also includes Professional Geotechnical Engineers and Inspectors with vast experience, specializing in a broad range of projects. Our in depth understanding of subsurface conditions and appropriate selection and design of geotechnical systems is crucial for successful projects and makes TSPE a premier choice in your geotechnical project needs.

Our staff have extensive providing Geotechnical Services for both private engineering and architectural firms, as well as working directly with local government, municipalities, and public agencies.


Geotechnical Services Available

Subsurface Investigations

  • Test Borings
  • Test Pits
  • Cone Penetration Testing
  • Borehole Geophysics Analysis
  • In-Situ Strength
  • Soil Permeability
  • Liquefaction Analysis
  • Geotechnical Engineering Reports & Foundation System Recommendations
  • Seismic Site Characterization

Support of Excavation

  • Secant Pile/Soil Mix Wall Design
  • Soldier Piles & Lagging Design
  • Sheetpile Wall Design
  • Tiebacks & Internal Bracing Systems Design & Testing
  • Soil/Rock Stabilization
  • Construction Dewatering
  • Underpinning Design
  • Finite Element Modeling
  • Peer Review


  • Construction Specifications
  • Support of Excavation Drawings
  • Ground & Structure Displacement Monitoring
  • Groundwater Monitoring

Foundation / Permanent Earth Retention Systems

  • Deep Foundation Design (Piles, Caissons)
  • Ground Improvement
  • Uplift Anchors Design
  • Retaining Structure Design
  • Geosynthetic Design (Geogrid, Geotextile, Lightweight Fill, Ground Anchors)
  • Slope/Embankment Stability


Contractor Related Geotechnical Services

  • Geotechnical Site Investigations:
    • Conducting field and laboratory testing to assess soil and rock properties at a site, this includes methods such as performing borings, test pits, collecting soil samples, and conducting laboratory testing to determine soil properties and/or design parameters.
  • Support of Excavation Design:
    • Designing temporary and permanent support systems, this includes excavation stability, selection of appropriate support systems such as soldier piles, sheet piles, secant piles, etc., as well considerations for settlement control and construction monitoring.
  • Foundation Design:
    • Designing foundations for structures based on soil conditions and loads, such as shallow foundations (spread footings and mat foundations) and deep foundations (piles and caissons).
  • Slope Stability Analysis:
    • Assessing the stability of slopes and embankments to prevent landslides and erosion.
  • Retaining Wall Design:
    • Designing retaining structures to stabilize earth and prevent soil movement, which includes various types of retaining walls such as gravity walls, cantilever walls, and anchored walls.
  • Earthwork Design and Construction Monitoring:
    • Providing specifications and overseeing earthmoving activities during construction.
    • Implementing construction monitoring plans and protocols for the protection of adjacent structures and utilities with the use of seismographs and optical survey targets.
  • Soil Improvement Techniques:
    • Implementing methods such as compaction, soil stabilization, and reinforcement to enhance soil properties, techniques such as compaction grouting, soil mixing, and chemical stabilization.
  • Groundwater Management:
    • Evaluating groundwater conditions and designing dewatering systems or groundwater control measures for construction sites.
  • Inspection Services for Soil or Foundations:
    • Providing inspection services for various foundation construction methods such as pile installation, secant walls, etc., which involves monitoring and ensuring compliance with design specifications and construction standards during foundation installation.