This paper provides an overview of the existing literature on the subject of ground penetrating radar (GPR) methods for the investigation of reinforced concrete structures. An overview of the use of concrete and reinforced concrete in civil engineering infrastructures is given. A review of the main destructive and non-destructive testing methods in the field is presented, and an increase in the use of GPR to reinforced concrete structures is highlighted. It was also observed that research in some application areas has been predominantly or exclusively carried out at a laboratory scale, and that similarly, other more application-oriented research has been developed only on real-life structures. The effectiveness of GPR in these areas is demonstrated. Furthermore, a case study is presented on a new methodological and data processing approach for the assessment of reinforced concrete structures using a high-frequency dual-polarised antenna system. Results have proven the advantages of using the proposed methodology and GPR system in order to improve the detectability of rebars, including secondary bottom lines of reinforcement. The horizontal polarisation was proven to be more stable compared to the vertical. Finally, it has been demonstrated that a more accurate location of the rebars in a high-density grid mesh arrangement can be obtained by means of data migration processing with a scan spacing of 5 cm and wave velocity information through the use of the hyperbola fitting method from at least 30% of the targets.

中文翻译：

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使用探地雷达方法调查钢筋混凝土结构

本文概述了有关用于钢筋混凝土结构调查的探地雷达 (GPR) 方法主题的现有文献。概述了混凝土和钢筋混凝土在土木工程基础设施中的使用。回顾了该领域的主要破坏性和非破坏性测试方法，并强调了探地雷达在钢筋混凝土结构中的使用增加。还观察到，一些应用领域的研究主要或专门在实验室规模进行，类似地，其他更面向应用的研究仅在现实生活结构上进行。探地雷达在这些领域的有效性得到了证明。此外，案例研究介绍了使用高频双极化天线系统评估钢筋混凝土结构的新方法和数据处理方法。结果证明了使用所提出的方法和探地雷达系统的优势，以提高钢筋的可检测性，包括钢筋的次要底线。与垂直极化相比，水平极化被证明更稳定。最后，通过使用双曲线拟合方法，以5 cm的扫描间距和波速信息进行数据偏移处理，可以得到高密度网格中钢筋的更准确位置。至少 30% 的目标。