Work and design of a new tunneling method 'SENS' to unconsolidated ground

Hiroomi Iida, Atsumi Isogai, Keizo Chishiro, Takatoshi Ono, Yukinori Koyama, Atsushi Koizumi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The Sambongihara Tunnel is on the Tohoku Shinkansen Line. The geology of this tunneling site mainly consists of alternating layers of unconsolidated sandy soil under high hydraulic pressures and cohesive soil. This tunnel was excavated using the NATM, but the tunnel face collapsed twice, preventing the tunnel construction from advancing as scheduled. We therefore conducted an in-depth study to develop a new tunneling technique, aimed at improving efficiency and safety of the work. The new tunneling method uses a standard earth and mud pressure shield to maintain face stability and ensure good excavating capability. This paper outlines the construction and design of the linings selected for this tunneling practice.

    Original languageEnglish
    Title of host publicationGeotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 5th International Conference of TC28 of the ISSMGE
    Pages231-237
    Number of pages7
    Publication statusPublished - 2006
    Event5th International Conference of TC28 of the International Society for Soil Mechanics and Geotechnical Engineering, ISSMGE - Amsterdam
    Duration: 2005 Jun 152005 Jun 17

    Other

    Other5th International Conference of TC28 of the International Society for Soil Mechanics and Geotechnical Engineering, ISSMGE
    CityAmsterdam
    Period05/6/1505/6/17

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    ASJC Scopus subject areas

    • Geochemistry and Petrology
    • Geotechnical Engineering and Engineering Geology

    Cite this

    Iida, H., Isogai, A., Chishiro, K., Ono, T., Koyama, Y., & Koizumi, A. (2006). Work and design of a new tunneling method 'SENS' to unconsolidated ground. In Geotechnical Aspects of Underground Construction in Soft Ground - Proceedings of the 5th International Conference of TC28 of the ISSMGE (pp. 231-237)