本四連絡橋の塗装と維持管理

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  • Coating and Maintenance of the Honshu-Shikoku Bridges
  • ホンシ レンラクキョウ ノ トソウ ト イジ カンリ

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The Honshu-Shikoku bridges are planned to connect Honshu with Shikoku by three routes. Among these, the Kojima-Sakaide route was entirely finished on April 10., 1988, and the other two routes are partially opened to traffic. Therefore the feature of the Honshu-Shikoku bridges is to construct many large bridges over straits, many technical developments are required; the development of anticorrosion coatings is one of these. This anticorrosion coatings are so developped as durable against sea mists and of long recoating cycle, because the total area of coating would be 6, 000, 000m2 after three whole routes finished. As for the bridge inspection which is a basis of maintenance, a specification is regulated, and by this, disposed full-time inspectors do the inspection work for rust condition and an extent of corrosion daily or regularly, then the coatings are treated at sooner period before the corrosion advances to be harmful. Moreover, many inspection ways and inspection vehicles are attached to the bridges for usual inspection and care. This report shows an outline of the coatings and inspection of the Honshu-Shikoku bridges.

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