Development and Application of Remarkably Rationalizing Technology for Assembling Working Platform on the Dam Lake during the Construction of Upgrading Dams

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  • ASAYAMA Jyunichi
    清水建設(株)　関西事業本部　鹿野川ダムトンネル洪水吐新設工事作業所
  • OHNUKI Hiroyuki
    清水建設(株)　北海道支店（元　鹿野川ダム工事用構台設置工事作業所）
  • YOSHIOKA Ryouichi
    清水建設(株)　関西事業本部　鹿野川ダムトンネル洪水吐新設工事作業所
  • KASE Toshihisa
    清水建設(株)　土木事業本部　土木技術本部　ダム統括部

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Other Title
  • ダム湖工事用構台架設の大幅な合理化技術の開発と実用化
  • ダムコ コウジヨウコウダイ カセツ ノ オオハバ ナ ゴウリカ ギジュツ ノ カイハツ ト ジツヨウカ

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Installing horizontal joints and brace members for connecting supporting piles is essential for assembling working platforms. In case of assembling the platforms on water, most working processes are dominated by underwater works by divers. As the visibility is often low in water of dam lakes, reducing such divers' operations as much as possible has been a challenge to enhance the safety and efficiency of the assembling works. We developed a rationalizing technology to install horizontal joints and brace members above the water by improving LIBRA method which is a conventional method for assembling working platforms. This technology was applied to the construction of upgrading Kanogawa Dam.

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