GPR Scan Locates Electrical Conduits at University of Chicago

Crown Corr contractors were building an expansion of the astroparticle laboratory at the University of Chicago in Chicago, IL. The expansion would require ten new columns to be anchored into the existing concrete slab and beams. Electrical conduits were known to run through the floors of this building, and these conduits were not to be damaged. Additionally, the contractor wished to avoid rebar while drilling the holes for the concrete anchors.

Ground Penetrating Radar Systems was hired to scan the concrete to locate rebar and conduits in areas where holes were to be drilled to set the new columns. A GPR scan was performed to determine the locations and depths of any reinforcing steel or other objects embedded in the floor and beams. Because GPRS uses GPR technology instead of X-ray, this scan was able to be performed quickly and easily during normal working hours, without interruption to other construction activities or evacuating the area. The locations of all rebar and conduits were marked directly on the concrete, allowing the holes to be adjusted as necessary to drill without hitting rebar or damaging electrical conduits.

Nathan Machel is regional director for GPRS operations throughout Wisconsin, Illinois, Iowa, Minnesota, and eastern Missouri. He is based in Chicago, IL and he can be reached by phone at 847-514-2277, 414-795-6485, or 314-412-9806 or by email at nathan.machel@gp-radar.com.