Infrasense Performs a Pavement Evaluation using Ground Penetrating Radar (GPR), Falling Weight Deflectometer (FWD), and Traffic Speed Deflectometer (TSD) in New Hampshire
Summary
A vehicle-based Ground Penetrating Radar (GPR) survey yielded continuous pavement layer thickness data along prescribed offsets within the project section. Falling Weight Deflectometer (FWD) testing was also performed at over 120 locations along the project section, which provided the data needed to calculate layer moduli, effective structural number (SN), remaining service life and required overlay thicknesses. The GPR data collection system was made up of a pair of 1 GHz air-launched horn antennas and a SIR-30 control unit, both manufactured by GSSI in Nashua, NH. The final report included a quantitative summary of average layer thicknesses in each lane, along with visual plots showing the sub-surface strata along the length of the section. Over the past 12 months, Infrasense has completed pavement structure evaluations across over 3000 miles of roadways in California, Colorado, Florida, Georgia, Massachusetts, Maryland, Minnesota, Montana, New Hampshire, New Jersey, New York, Ontario, South Carolina, Texas, Virginia, and Vermont.