【一般講演】岩盤工学／資源開発技術［3/18(月) AM 第1会場］

[2K0101-08-07] 地中レーダによるトンネル覆工内亀裂の検出に対するリバースタイムマイグレーションの適用性

○張 竺轲^{1[修士課程]}、武川 順一¹ (1. 京都大学)

司会：宮崎 晋行（産業技術総合研究所）

キーワード：地中レーダ、亀裂検出、フェーズアレイソース、リバースタイムマイグレーション

As a widely employed non-destructive testing method, Ground Penetrating Radar presents challenges in the interpretation of its direct output results. To obtain more intuitive outcomes,high-resolution imaging results were achieved through the application of the reverse time migration method combined with phased array sources. In the test utilizing a random crack model generated by Perlin noise, the imaging results under this method accurately reflected various parameters such as crack location and shape. Subsequently, leveraging the characteristics of tunnel structures and the reverse time migration algorithm, the imaging results were further enhanced by utilizing the information from reflected waves generated at the inner boundary of tunnel structures and the multiple waves generated at the crack location. Finally, a quantitative evaluation method was conducted on the various imaging results.