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Ground Penetrating Radar for Railroad Track Substructure Evaluation.
| 题名： | Ground Penetrating Radar for Railroad Track Substructure Evaluation. |
| 作者： | hyslip, j. p. olhoeft, g. r. smith, s. s. selig, e. t. |
| 关键词： | substructure condition, substructure performance, gpr principles, modeling techniques, hi-rail vehicle, horn antennas |
| 摘要： | The report presents the results of the first three phases of a multiphase project to adapt Ground Penetrating Radar (GPR) to railroads for use in developing useful indices of substructure condition and performance. Included are brief discussions of some basic GPR principles, as well as data processing and modeling techniques that are applicable to railroad surveys. The railway GPR equipment is mounted on a hi-rail vehicle and includes multiple sets of 1-GHz air-launched horn antennas suspended above the track that permit fast survey travel speeds and high resolution measurements to a depth of 1 to 2 m. The multiple sets of antennas provide transverse and longitudinal measurements of the track substructure. The report presents example results from more than 200 miles (320 km) of surveys to demonstrate the capabilities and applicability of GPR to assess railway track substructure (ballast, subballast, and subgrade) conditions and to produce quantitative indices of railway track substructure condition for use in track substructure maintenance management efforts. / NOTE: Final rept. Apr 01-Aug 04. / Supplementary Notes: Sponsored by Federal Railroad Administration, Washington, DC. Office of Research and Development. / |
| 报告类型： | 科技报告 |
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