DAMAGE EXTRACTION AND HEAT MAP DISPLAY OF HIGHWAY BRIDGES USING 3D POINT CLOUD DATA

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  • 3次元点群データを用いた道路橋の損傷抽出とヒートマップ表示

Abstract

<p> It is inevitable that a decrease in the working population will lead to a shortage of skilled bridge inspectors due to the declining population, low birthrate and aging population. It is important to improve and equalize the quality of the inspection data, which is the basis for understanding the condition of bridges, in order to allocate an appropriate and optimal budget and to formulate a life-extension repair plan. In addition, it is necessary to grasp the progress of the damage appropriately, to make an accurate diagnosis, and to plan appropriate countermeasures.</p><p> In this study, we proposed a technique to support the inspection of bridges in the field (external work) by visualizing damaged area using heat maps based on 3D point cloud data of the bridge to be inspected, and by finding damage in the heat maps to support the bridge inspectors. The proposed method was evaluated by infrastructure engineers, and the requirements and issues for the field support technology were summarized.</p>

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