Revision of the Guidelines for Design and Construction of Grouting for Prestressed Concrete Structures

H. Mutsuyoshi, M. Tezuka, K. Niitani, H. Hosono
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Abstract

The Guidelines for Design and Construction of Grouting for Prestressed Concrete Structures, established in 2005 by the Japan Prestressed Concrete Institute, have been revised for the first time in seven years. Among the major revisions are 1) the clarification of the necessary qualifications of engineers involved in PC grouting work, 2) the update of the materials used to the latest version, 3) the clarification of the positioning of full-scale tests, 4) the clarification of priorities regarding mixing, 5) the clarification of the period from after prestressing steel insertion to PC grout injection, 6) the reduction of the guaranteed material ages for the compressive strength test, and 7) changes to the frequency of routine control tests according to actual conditions.プレストレストコンクリート工学会において,2005年に「PCグラウトの設計施工指針」が規準化されて以来7年の経過を経て改訂された。主な改訂点は,①PCグラウトに携わる技術者の資格要件を明確にしたこと,②使用材料を最新版に更新したこと,③実物大試験の位置付けを明確としたこと,④配合において優先すべき事項を明確としたこと,⑤施工においてPC鋼材挿入後PCグラウト注入までの期間を明確としたこと,⑥圧縮強度試験の保証材齢を短縮したこと,⑦日常管理試験の頻度を実態に即して変更したこと,等が挙げられる。
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修订《预应力混凝土结构注浆设计及施工指引》
The Guidelines for Design and Construction of Grouting for Prestressed Concrete Structures2005 by the Japan Prestressed Concrete Institute, establishedhave been revised for the first time in seven years. Among the major revisions are 1) theclarification of the necessary qualifications of engineers involved in PC grouting work,2) the update of the materials used to the latest version,3) the clarification of the positioning of full-scale tests,the clarification of priorities regarding mixing,5) the clarification of the period from after prestressing steel insertion to PC grout injection,6)保护material ages for the compressive strength test,and 7)改变es to the frequency of routine control tests according to actualconditions.预应力混凝土工程师学会自2005年制定《PC地应力设计施工指南》以来,历经7年终于进行了修订。主要的修订点有:①明确了从事PC绘图的技术人员的资格条件;②更新了最新版的使用材料;③明确了实物大测试的位置;④明确了配合时应优先考虑的事项;⑤在施工中明确了插入PC钢材后到注入PC石墨的期间,⑥缩短了压缩强度试验的保证材料年龄,⑦根据实际情况改变了日常管理试验的频度等。
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