Mapping Voids, Debonding, Delaminations, Moisture, and Other Defects Behind or Within Tunnel Linings (2013) / Chapter Skim
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Pages 312-314
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From page 312... ...
312 a p p e N D I x t These specifications are based on the ground-penetrating radar (GPR) reflection from a large metal plate.
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From page 313... ...
313 Figure T.1. Examples of acceptable and unacceptable metal plate reflections.
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From page 314... ...
314 end reflection at the tip of the antenna to the metal plate reflection shall be is measured for each trace, and their mean is time ti (where the subscript represents height position at i)
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