An experimental study on the maintenance and repair of communication cable tunnels constructed by shield tunneling method

Teiichi Sudo, Takuya Ishikawa, Ryo Hirasawa, Hayato Hoshino, Atsushi Koizumi

    研究成果: Conference contribution

    抄録

    The current understanding is that aged deterioration poses a serious problem in the most of all communication cable tunnels that take an important role in information-oriented society. Lots of communication tunnels have been in existence for 30 years after construction, and there deteriorations by decrepitude have been coming to the surface. To use communication tunnels efficiently under this situation, suitable maintenance and repair are required. So, the establishment of the assessment method giving the correct strength diagnosis has become imperative. However, it remains to be elucidated how to evaluate soundness of tunnel appropriately in the limited funds and time. To establish the evaluation method, here we study structural performance of the tunnel itself and whether tunnel which a crack and corrosion generated can bear the purpose of use. In this study, we examined the degree of soundness about communication shield tunnels considering the main structural steel segment and also the secondary lining which is not expected its strength in the design. That is for the purpose of studying the practical and effective reinforcing method. Based on the perspective presented above, to establish analysis models about communication tunnels of various conditions, we confirmed each load bearing behavior of the steel segment and the secondary lining by seven experiments with a 1/2 scale models and numerical analyses. And the validity of an analysis model and the effect of the reinforcement construction method were investigated. The results of the study show the indicator of the maintenance management technique over the communication cable tunnels of various states.

    本文言語English
    ホスト出版物のタイトルLife-Cycle of Structural Systems: Design, Assessment, Maintenance and Management - Proceedings of the 4th International Symposium on Life-Cycle Civil Engineering, IALCCE 2014
    出版社CRC Press/Balkema
    ページ678-685
    ページ数8
    ISBN(印刷版)9781138001206
    出版ステータスPublished - 2015
    イベント4th International Symposium on Life-Cycle Civil Engineering, IALCCE 2014 - Tokyo, Japan
    継続期間: 2014 11 162014 11 19

    Other

    Other4th International Symposium on Life-Cycle Civil Engineering, IALCCE 2014
    CountryJapan
    CityTokyo
    Period14/11/1614/11/19

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Safety, Risk, Reliability and Quality

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