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Integrating Deflection and Ground Penetrating Radar Data for Pavement Evaluation.
| 题名： | Integrating Deflection and Ground Penetrating Radar Data for Pavement Evaluation. |
| 作者： | LIU, W.; SCULLION, T. |
| 关键词： | EVALUATION; PAVEMENTS |
| 摘要： | The Texas Department of Transportation (TxDOT) has used both falling weight deflectometers (FWD) and ground penetrating radar (GPR) technology for more than 10 years to provide structural information about its pavements. With the current system, GPR data are processed independently of FWD analysis. GPR data are processed with the COLORMAP analysis system, and FWD data are processed with MODULUS 6.0. There is substantial synergy in combining the analysis capabilities of both systems. For example, backcalculation of the layer thickness of the pavement at the location of the deflection data must be input. These data are typically obtained from either existing plans or limited coring. Inaccurate estimates account for a large source of error in the resulting layer moduli values. In addition to providing more accurate layer thickness information, GPR can identify defects in subsurface layers, such as the presence of deteriorated layers in the hot mix or areas of high base moisture contents. Both of these defects can be used to explain changes in results from the FWD backcalculation process. |
| 报告类型： | 科技报告 |
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