Removal, examination and testing on the Chousei bridge and the Taihei bridge which are the first prestressed concrete bridges in Japan

日本第一座预应力混凝土桥梁长成桥和太平桥的拆除、检查和测试

• 批准号: 13650503
• 负责人: TORII Kazuyuki
• 金额: $ 2.43万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650503/
• 关键词: Chousei bridge; Taihei bridge; Prestressed Concrete Bridge; Historical Bridge; Quality of concrete; Corrosion of steel bar; Load-bearing capacity; Durability; プレストレストコンクリート橋; 歴史的建造物; 鋼材腐食; 耐荷力; PC橋; 解体調査; 土木技術史; 載荷試験; 耐久性調査; 配合推定; 材料試験

The Chousei bridge and the Taihei bridge are the first prestressed concrete bridges (PC) in Japan, which were constructed in 1953 and 1954 across the Misogi river in Nanao city in Ishikawa Prefecture. After symbolizing the birth of PC bridge in Japan for 50 years, the bridge was earmarked for relocation as part of an urban development project. They were dismantled in August 2000 and in September 2001. Following its removal, some of the girders were subjected to examination and load testing to determine both the physical and chemical properties of old concrete and the load-bearing capacity of old bridge. The water to cement ratio of the concrete was found to be as low as 33 % and it texture was also very dense. This proves that the concrete mixed for bridge is very durable, which results in no carbonation of concrete and little corrosion of stee bars and PC wires in concrete. The bending and shearing load capacity of girders of the gbridge was also found to be satisfactory for the requirements of specifications of road bridges. After the test, the Chousei bridge was relocated to the memorial park on the outskirts of Nanao city.

Chousei大桥和太平大桥是日本第一座预应力混凝土桥梁(PC)，分别于1953年和1954年在石川县南澳市的米佐木河上修建。在象征着PC桥在日本诞生50年后，这座桥被指定用于搬迁，作为城市发展项目的一部分。它们分别于2000年8月和2001年9月被拆除。拆除后，对部分梁进行了检测和荷载试验，以确定旧混凝土的物理和化学性质以及旧桥的承载能力。混凝土的水灰比低至33%，质地也非常致密。结果表明，桥梁混凝土具有良好的耐久性，混凝土不会发生碳化，混凝土中钢筋和PC钢丝的锈蚀程度较小。桥梁主梁的抗弯和抗剪承载能力也满足公路桥梁规范的要求。测试结束后，Chousei大桥被搬迁到南澳市郊的纪念公园。

项目成果

Satoh, K., Mori, T., Matsumoto, K., Torii, K.: "Investigation on Durability of the Taihei Bridge (in Japanese)"Journal of Prestressed Concrete. Vol.43, No.2. 118-123 (2001)

Satoh, K.、Mori, T.、Matsumoto, K.、Torii, K.：“太平桥耐久性研究（日语）”预应力混凝土杂志。

Okuda, Y.: "Japan' First Prestressed Concrete Road Bridge- Chousei Bridege"National Report of 1st fib Congress 2002. 77-80 (2002)

奥田 Y.：“日本第一座预应力混凝土公路桥 - 长成桥”2002 年第一届 Fib 大会国家报告。77-80 (2002)

西垣義彦, 小門前亮一, 奥田由法, 鳥居和之: "日本最初のPC橋-長生橋の耐久性調査"コンクリート工学年次論文集. Vo.24-2. 607-612 (2002)

Yoshihiko Nishigaki、Ryoichi Komonzen、Yoshiho Okuda、Kazuyuki Torii：“日本第一座预应力混凝土桥——长生桥的耐久性研究”，混凝土工程年报，Vo.24-612（2002）。

鳥居和之: "プレストレスコンクリート橋の歴史的変遷を訪ねて-長生橋および泰平橋の耐久性調査-"知の集積回路 プロジェクト金沢II 産官学協力の最前線. 2-5 (2001)

鸟井和之：“探访预应力混凝土桥梁的历史变迁——长生桥和太平桥的耐久性调查——”知识集成电路项目金泽II产官学合作的前沿2-5（2001）。

鳥居和之: "プレストレストコンクリート橋の歴史的変遷を訪ねて-長生橋および泰平橋の耐久性調査-"平成12年度金沢大学放送講座 知の集積回路プロジェクト金沢II. 1-5 (2001)

鸟居和之：“参观预应力混凝土桥梁的历史变迁-长生桥和太平桥的耐久性调查”2000年金泽大学广播课程知识集成电路项目金泽1-5（2001）