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首页> 美国政府科技报告 >Application of Non-Destructive Testing to Evaluate Unknown Foundations for Pennsylvania Bridges. Final Report.
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Application of Non-Destructive Testing to Evaluate Unknown Foundations for Pennsylvania Bridges. Final Report.

机译：应用无损检测评估宾夕法尼亚桥梁未知基础。总结报告。

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摘要

Unknown bridge foundations present a unique challenge to Departments of Transportation (DOT) across the country since foundation characteristics are a necessary input to assess scour vulnerability and to develop appropriate scour countermeasures. A number of non-destructive testing techniques have evolved over time to address this challenge and evaluate unknown foundation type and geometry. The most comprehensive study of NDT methods for unknown foundations was performed as part of National Cooperative Highway Research Program (NCHRP) 21-05 in 2001. Since NCHRP 21-05 other case studies have expanded the literature and further advancements in computer software and hardware have improved NDT capabilities and reliability for unknown foundation evaluation. In particular, P-wave reflection imaging has the potential to provide higher resolution data and significantly more detail regarding the subsurface in both the laboratory and the field. An ultrasonic P-wave reflection imaging system was investigated in this study as a viable NDT method to assess unknown foundations. The P-wave system was originally developed to image large scale soil models in the laboratory and to image the profile of vertically embedded structural elements such as foundations.

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