A framework for maintenance of shield tunnels with secondary linings using strength and life-cycle cost as indicators

J. H. Wang, M. Nakano, H. Tanaka, A. Koizumi

    研究成果: Conference contribution

    抄録

    Many shield tunnels have been constructed during the urban development of past decades, serving as important municipal infrastructures, such as for roads, railways, water supplies and sewers, etc. However, continued good performance of such urban utilities requires appropriate maintenance of the tunnel structure, especially when used beyond the designed working life. On the other hand, maintenance of extensive social infrastructure demands a substantial budget, so a rational stock management method is adopted by agencies and authorities. Although preventive maintenance has been realized in the most efficient and effective manner, based on the criteria for the life-cycle cost and performance of such structures, there is still some argument about the superiority of corrective and preventive maintenance, and predictive maintenance. In any event, how life-cycle performance should be predicted and evaluated must still be studied, as well as the selection of the most appropriate countermeasures for maintenance. This paper examines shield tunnels with secondary linings, and proposes a maintenance framework based on performance-based design. Strength is used as an indicator of structural performance, considering their features of having a secondary lining and being infrastructure utilities. A successful application of the framework to trunk sewer pipe is also presented. The sewage tunnel strengths under the designed static and seismic events were evaluated using numerical analysis, and the corresponding life-cycle costs were estimated for three assumed cases of steel corrosion and countermeasures. The rational countermeasures was then more easily selected by determining the minimum life-cycle cost per unit strength for a designed period.

    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662-669
    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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