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  4. Vol.38 No.121 2013.9


Vol.38 No.121 2013.9


* By clicking ▸ on the title of Technical Reports, abstract will be indicated.

【巻頭言】Prefatory note

  • 技術の横串を通そう

    Technological capability improvement by integration of basic technologies and applied technologies


    Shuji Mihara

【技術論文】Technical report

  • 海峡部橋梁マスコンクリート表面被覆要領の制定

    Establishment of Guideline for Coating of Mass Concrete Structure of Long-Span Bridge


    Katsuya Ogihara, Taku Hanai



    The foundations of the Honshu-Shikoku Bridges are large-scale mass concrete structures. In order to maintain them in a good shape, it is indispensable to prevent intrusion of deterioration factors such as salt, carbon dioxide, etc. For this purpose, surface coatings were applied to many of the foundations. Based on the survey of the coatings applied on the actual foundations and exposed for about 10 to 20 years in addition to the results of insitu testing conducted at the time of application, “Guideline for Coating of Mass Concrete Structure of Long-Span Bridge” was established.

    In this report, series of surveys and their results are summarized. And the key points of the Guideline are explained.

  • 非破壊検査による吊橋ハンガーロープの経年変化の調査

    Follow-up of corrosion suspender ropes by non-destructive inspection


    Yasushi Ohtani, Akira Moriyama, Yuki Kishi


    As corrosions were found on the suspender ropes of some suspension bridges by visual inspection, main flux method, which is able to detect internal corrosion situation accurately, was developed and has been applied as a nondestructive inspection method. The corroded suspender ropes of the Innoshima Bridge and the repaired suspender ropes of the Ohnaruto Bridge, inspected in the past, were inspected again by the method. Since remarkable corrosions were observed at the anchoring part of the suspender ropes of the Ohnaruto Bridge, these corrosions have been repaired. It was confirmed that there was no significant progress of corrosion by these follow-up inspections.

  • 舗装マネジメントシステムの構築

    Development of Pavement management system for Honshu-Shikoku Bridge Expressway


    Takeshi Sugiyama, Kiyohiro Imai


    In order to maintain the road surface and to determine an effective maintenance plan, Pavement Management System (JBPMS) for Honshu Shikoku Bridge Expressway has been developed. JBPMS is comprised of three functions including a database system, a management system, and a mapping system. The database system accepts various precise data used in the management system. The management system extracts data by taking into accounts various options from the database system, classifies the extracted data, and performs a deterioration prediction. In addition, the management system conducts an economic analysis and assists pavement management decisions. The mapping system displays results obtained by the management system on a large scale Geographic Information System (GIS) in order to support decision making. GIS presents road structures such as embankments, cutting slopes, tunnels, and bridges to identify the location of pavement.

【海外報告】Overseas report

  • マタディ橋維持管理能力向上プロジェクト

    Overseas Report (Project on capacity development for bridge management)


    Masahiko Takeuchi

【長大橋技術センターアニュアルレポート】Annual report of Long-Span Bridge Engineering Center

  • 主塔内防食手法の検討

    Study on Corrosion Protection for the Inside of Steel Towers


    Katsuya Ogihara, Masahiko Takeuchi

  • 本四陸上部橋梁の耐震補強検討

    Study on Seismic Retrofit of Honshu-Shikoku Bridges (Other than Long Span Bridges)


    Susumu Fukunaga, Masahiro Takeguchi, Chihiro Kawatoh

  • 疲労対策への取組(疲労対策チーム活動)

    Efforts against fatigue damage (Activity by the project team against fatigue)


    Yoshihiro Kobayashi

【技術ニュース】Technical news