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| | Abstract | | Ground penetrating radar (GPR) is applied to cavity survey in the social infrastructure maintenance. The GPR instruments of various methods are used for GPR. However there are differences by the research companies or engineers about the cavity evaluation. In this study, we collected the conventional GPR instruments or systems and examined those applicability. We searched the database NETIS of Ministry of Land, Infrastructure and Transport and HP of each research company and checked surveying instruments and the system. We classified these surveying instruments and systems about exploration depth or exploration efficiency, and showed future directionality. |
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