構造評価（舗装）

[V-539] Grasp of cavity of tunnel concrete paving slab by car-mounted electromagnetic wave radar and feature extraction of caution points

〇Keiji Takasago¹, Hideaki Morita², Takaaki Fujigaya³, Kengo Obama⁴ (1.West Japan Expressway Engineering Chugoku Co., Ltd., 2.Geo Search Co., Ltd., 3.West Japan Expressway Co., Ltd., 4.Osaka University Graduate School)

Keywords:cavity, Automotive electromagnetic radar, Vehicle mounted electromagnetic wave radar

In the survey of the tunnel concrete pavement on the expressway, the cavity was predicted by the vehicle-mounted electromagnetic wave radar. By comparing the results with actual core boring results, it was verified that the electromagnetic wave radar is effective as a cavity survey method. In addition, the situation around the cavity in the pavement will be examined and examples of cautionary points where the cavity is likely to progress will be described.