Infrasense completed a non-destructive survey of two intersecting multilane roadways in Virginia Beach, VA. The survey provided the client with subsurface pavement structure data along all driving lanes, shoulder lines, and turn lanes within the project section. Pavement layer thicknesses were plotted to produce a complete profile of the pavement structure. The profiles and layer…
Infrasense completed a ground penetrating radar (GPR) survey to map the reinforcing steel layout and depth along the underside of a bridge deck in Fond du Lac, Wisconsin. The rebar map will be used by the client to assess the load carrying capacity of the structure and ultimately to update the load rating. The GPR…
This June, Infrasense conducted a non-destructive survey and report for a 2.3-mile section of a multilane roadway, in Virginia Beach, VA. The project provided the client with data from all 4 driving lanes, both outer shoulder lines, and all turn lanes within the section. Pavement layer thicknesses were plotted along with recommended coring locations where…
Infrasense mobilized from Boston to Virginia to survey Norfolk’s 64,000 square foot Granby Street Bridge. The GPR survey was done in March, and the IR survey was done in April, when the weather conditions were sufficient for revealing subsurface delaminations. The GPR survey was performed at normal driving speed, and IR was done at a…
Infrasense recently completed an internal research effort to assess the feasibility and accuracy of aerial imaging for mapping bridge deck conditions. The results of this study provided support for implementation on upcoming projects. The primary advantage of the aerial method is its efficiency. Data can be collected for hundreds of bridge decks in a single…
Infrasense recently completed a project using a ground coupled vehicle mounted 3D Ground Penetrating Radar (GPR) system (manufactured by 3D-Radar) to identify subsurface objects that would impede future installation of sheet pile walls at the Brooklyn Terminal. Using the trailer-mounted 3D-Radar step frequency array system reduced the data collection time significantly and provided an excellent…
In early April, Infrasense conducted a non-destructive survey and report for 10 lane miles of a section of Route 2, in Rhode Island. The project provided the client with 4 sets of data showing where concrete appears to be present under the asphalt pavement versus an aggregate base. The survey was conducted at driving speed…
We provided pavement layer thickness information to facilitate FWD back-calculation efforts, and ultimately the determination of Pavement Classification Numbers (PCNs) for all airport pavement facilities.
This past summer, Infrasense conducted a multi-faceted non-destructive survey and report for 84 lane miles of a section of I-86, made up of abutted concrete panels. The project provided the client with a comprehensive set of condition results to identify and map out distressed panels along the roadway. Surveys were performed at normal driving speed…
Infrasense completed a subsurface pavement structure investigation of both directions of a 1-mile long viaduct on Interstate 93, just north of Boston. This viaduct, adjacent to the Leonard P. Zakim Bridge, leads directly into Boston, so minimal traffic disruption of this corridor is a priority. Infrasense used a high-speed ground penetrating radar (GPR) survey to detect…