Geotechnical Research

The NHDOT research program supports the evaluation and implementation of new methods of subsurface investigation. Improved site characterization can result in improved design work that can, in turn, lower costs.

Innovative Geotechnical Exploration Methods Evaluated through Research


ACTIVE: Use of Drilling Parameters for Enhancing Geotechnical Site Investigations (42372F)

Advancing Subsurface Investigations Beyond the Borehole (42372G)

Use of Smart Rocks to Improve Rock Slope Design (26962Z)

Improved Practices for Determining the Infiltration Characteristics of Soils for Design of Stormwater BMPs (26962U)

Iron Oxide Deposits on Highway Construction Projects (26962Q)

  • Researcher: U.S. Geological Survey, New England Water Science Center
  • Date: 2019
  • Final Report

A digital file, which can be used with a GIS, is available as a part of an associated data release. The map shows the probability of iron fouling occurring at any location across the state where rock-fill used in road construction projects comes into contact with drainage.

Pilot Study - Rolling Wheel Deflectometer, Falling Weight Deflectometer, and Ground Penetrating Radar on New Hampshire Roadways (14282N)

  • Researcher: New Hampshire Department of Transportation
  • Date: 2011
  • Final Report

Field Performance Evaluation of Pile Points (MPS 2003-01)

  • Researcher: New Hampshire Department of Transportation
  • Date: 2009
  • Final Report

Development of a Geotechnical GIS for Subsurface Characterization with 3D Modeling Capabilities (12323V2)

Integrated Geophysical Methods for Geotechnical Subsurface Investigations (13733E)

Barron Mountain Rock Reinforcement Evaluation (13733L)

Effectiveness of a Pile Driving Analyzer (PDA) for Determining Pile Capacity in NH Soils (12323H)

  • Researcher: New Hampshire Department of Transportation
  • Date: N/A
  • Poster

GIS and the New Hampshire Rock Cut Management System (12323V)

Enhancing Geotechnical Information with Ground Penetrating Radar (GPR) (12323U)