Geotechnical Engineering

119 Gaillardia Loop

Professional Engineering Services

119 Gaillardia Loop – Geotechnical Exploration, St. Augustine, FL
  • Location St. Augustine, FL (St. Johns County)
  • Owner B Construction, LLC
  • Markets Residential, Geotechnical Engineering
  • Services Geotechnical Exploration, Subsurface Investigation, Laboratory Testing, Foundation Recommendations

Project Description

NicNevol Engineering Services performed a geotechnical exploration and evaluation for a proposed residence at 119 Gaillardia Loop in St. Augustine, FL. The purpose of the study was to assess subsurface soil and groundwater conditions and provide recommendations for foundation design. :contentReference[oaicite:1]{index=1}

The field program included two (2) Standard Penetration Test (SPT) borings drilled to depths of 25 ft and 50 ft using a CME 55 drill rig. Subsurface conditions revealed loose to medium dense silty sands with shell in the upper 20 ft, underlain by sandy clays (25–32 ft) and fine sands with shell to 50 ft depth. Groundwater was encountered at 1.5–2.0 ft below surface, with seasonal fluctuations expected. :contentReference[oaicite:2]{index=2}

Engineering recommendations determined that shallow foundations were not suitable due to weak sandy soils near the surface. Deep foundations (such as driven piles) were recommended to provide adequate bearing capacity and minimize settlement risks. :contentReference[oaicite:3]{index=3}

NicNevol Responsibilities

  • Performing SPT borings with CME 55 drill rig.
  • Collecting and classifying soil samples for laboratory testing.
  • Evaluating soil stratigraphy, groundwater, and bearing conditions.
  • Providing recommendations for foundation type and design parameters.
  • Advising on site preparation and groundwater control measures.
  • Delivering the final geotechnical report with engineering guidance.

Project Highlights

  • Client: B Construction, LLC.
  • Proposed single-family residence in St. Augustine, FL.
  • Field program: 2 SPT borings (25 ft and 50 ft).
  • Subsurface profile: silty sands with shell (0–20 ft), sandy clay (25–32 ft), fine sands to 50 ft.
  • Groundwater: ~1.5–2.0 ft depth (seasonal fluctuations expected).
  • Recommendations: deep foundations (driven piles), site preparation, groundwater control.