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Bridge deck condition assessment using ground penetrating radar
In a collaborative effort between Geophysical Survey Systems and the Maine Department of Transportation, the BridgeScan GPR system was used on April 13th, 2005 to evaluate the condition of an asphalt overlaid bridge deck located in Lewiston, Maine known as the Ramp D from Main Street over Maine Central Railroad. The GPR data was collected along the bridge deck in lines parallel to the direction of traffic. The profile lines were perpendicular to the transverse direction of the upper-most rebar. GPR data lines were acquired at two foot spacing by simply manually walking the BridgeScan cartbased system along the bridge deck. The data collection process was completed in less than one hour. The GPR data was processed using GSSI RADAN software program with the corresponding Bridge Assessment Module. The results were used to produce a color coded deterioration map of the bridge deck. The deterioration map from the GPR data was compared with the visual data from the top-side and bottom-side visual inspections. The comparisons of the GPR data with top and bottom side visual inspection data demonstrated excellent correlation. Based on all data, it was determined that over 50 % of the Ramp D bridge deck was significantly deteriorated. The Maine DOT later removed the asphalt overlay and conducted a chain drag of the deck and comparing these results with the GPR data demonstrated excellent correlation. Excavating the concrete for bridge repair provided actual confirmation of the validity of the GPR method.
Bridge deck condition assessment using ground penetrating radar
In a collaborative effort between Geophysical Survey Systems and the Maine Department of Transportation, the BridgeScan GPR system was used on April 13th, 2005 to evaluate the condition of an asphalt overlaid bridge deck located in Lewiston, Maine known as the Ramp D from Main Street over Maine Central Railroad. The GPR data was collected along the bridge deck in lines parallel to the direction of traffic. The profile lines were perpendicular to the transverse direction of the upper-most rebar. GPR data lines were acquired at two foot spacing by simply manually walking the BridgeScan cartbased system along the bridge deck. The data collection process was completed in less than one hour. The GPR data was processed using GSSI RADAN software program with the corresponding Bridge Assessment Module. The results were used to produce a color coded deterioration map of the bridge deck. The deterioration map from the GPR data was compared with the visual data from the top-side and bottom-side visual inspections. The comparisons of the GPR data with top and bottom side visual inspection data demonstrated excellent correlation. Based on all data, it was determined that over 50 % of the Ramp D bridge deck was significantly deteriorated. The Maine DOT later removed the asphalt overlay and conducted a chain drag of the deck and comparing these results with the GPR data demonstrated excellent correlation. Excavating the concrete for bridge repair provided actual confirmation of the validity of the GPR method.
Bridge deck condition assessment using ground penetrating radar
Untersuchung des Zustands von Brückenbelägen mittels Bodenradar
Parrillo, R. (author) / Roberts, R. (author) / Haggan, A. (author)
2006
12 Seiten, 14 Bilder, 6 Quellen
Conference paper
Storage medium
English
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