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論文投稿 地中レーダ探査を用いた砂防堰堤内部亀裂分布調査

作成年度 2017 年度
論文名 地中レーダ探査を用いた砂防堰堤内部亀裂分布調査
論文名(和訳)
論文副題
発表会
誌名 砂防学会誌
巻・号・回 70 3
発表年月日 2017/09/15
所属研究室/機関名 著者名(英名)
土木研究所清水 武志
土木研究所(現 応用地質)青池 邦夫
土木研究所(現 国土交通省)泉山 寛明
土木研究所藤村 直樹
土木研究所稲崎 富士
抄録
Ohori et. al. (2013) mentioned Ground Penetrating Radar (GPR) applied to check dams was possible to detect weak region of strength of concrete. To clarify3‐D image of surface displacement and distribution of internal clacks in the dam, this article shows that application of SfM‐MVS and GPR to a check dam (Sabo dam) with clacks by a debris flow which was occurred in Nagiso Chou, Nagano Prefecture at July 9, 2014. Because a catch dam is concrete structure, GPR is assumed to be a good investigation tool in order to earn3‐D mapping data of internal clacks. Another merits of GPR is portability and easy‐to‐use in fields. Our result shows the clacks are categorized as mainly three types:1) a large clack which possibly cause a dam collapse, 2) complexity shape of clacks, and 3) a small size of clacks. Applicable range of our study is that800MHz GPR clearly traces continuous clacks inside a concrete dam at least less than1.0m depth.
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