Mapping Voids, Debonding, Delaminations, Moisture, and Other Defects Behind or Within Tunnel Linings (2013) / Chapter Skim
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Pages 91-97
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91 a p p e N D I x K air-Coupled Gpr Operating principles The Texas A&M Transportation Institute (TTI) air-coupled ground-penetrating radar (GPR)
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92 The equipment could not detect delaminations or voids in the other sections. Figure K.2 shows the analysis of the GPR data on Specimen D using the COLORMAP program.
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93 Figure K.3. Analysis of air-coupled GPR data on Specimen F
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94 Figure K.5. Air-coupled GPR data collected for the Washburn Tunnel.
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95 at the Chesapeake Bay. The team could not collect air-coupled GPR data at that location because construction equipment blocked access to the wall at the time of the air-coupled GPR data collection.
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96 Figure K.9. Air-coupled GPR data collected for the Hanging Lake Tunnel roof.
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97 No Name Tunnel In the No Name Tunnel, the team collected only air-coupled GPR data. Figure K.11 shows an example of the air-coupled GPR data taken in that tunnel.
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