Infrasense Performs Subsurface 3D-Radar Survey of Brooklyn Terminal

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For a relatively local project to Infrasense’s Boston office, the team mobilized to Brooklyn, NY for a one-day, 200,000 square foot survey of the Brooklyn Terminal. The purpose of the survey was to identify subsurface objects that could impede future installations on the site.

Infrasense’s vehicle mounted, 3D-Radar setup, on site at the Brooklyn Terminal

Using the trailer-mounted 3D-Radar step frequency array system reduced the data collection time significantly and provided an excellent combination of resolution and depth of penetration.

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 combination of resolution and depth of penetration. Using traditional GPR setups to obtain this type of data would require multiple surveys using different frequencies of antennas, adding even more time to the data collection process. The 3D-Radar system uses a 21-antenna array to obtain frequency data from 300 MHz to 3GHz, and image the subsurface in 3 dimensions.

High precision GPS was integrated into the data collection system to combine adjacent lines of data and map common subsurface features accurately. Final utility maps were provided as plan-view drawings and in CAD-compatible format. These utility map deliverables included locations of utilities, underground storage tanks, obstructions and structural components possibly related to building foundations. Infrasense also discovered a series of railroad tracks that were thought to have been removed in the past, but were instead buried in asphalt.

About Infrasense, Inc.
Since 1987, Infrasense, Inc. has applied advanced technologies to address the most difficult challenges in subsurface scanning. Infrasense's engineers extract critical information using non-destructive methods from a diverse range of structures. In addition to providing ongoing subsurface evaluation services to clients across the country, the firm has also conducted numerous research programs to advance the field of subsurface detection and nondestructive evaluation. To learn more about Infrasense and the services we provide, visit our website:
http://www.infrasense.com

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Lori McCormick
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