Buckling of encased liner under external pressure and the effects of voids in backfilling grout

J. H. Wang, M. Nakano, Z. H. Shi, A. Koizumi

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

    8 Citations (Scopus)

    Abstract

    A common phenomenon in trenchless technology is the occurrence of voids in grouting. We investigate the impact of such voids on buckling of an encased liner under external pressure using a numerical solution of the nonlinear contact analysis method. The buckling behavior is clarified and the critical pressure is tested theoretically. An encased liner always fails in single-lobe buckling if there are no voids. Voids greatly change the behavior of the encased liner; as the void size increases, the buckling mode may switch from singlelobe buckling to free buckling of an arch even at an infinitely long pipe, and the buckling strength decreases sharply in stages.

    Original languageEnglish
    Title of host publicationShell Structures: Theory and Applications - Proceedings of the 10th SSTA 2013 Conference
    Pages259-262
    Number of pages4
    Volume3
    Publication statusPublished - 2014
    Event10th Jubilee Conference on "Shell Structures: Theory and Applications", SSTA 2013 - Gdansk
    Duration: 2013 Oct 162013 Oct 18

    Other

    Other10th Jubilee Conference on "Shell Structures: Theory and Applications", SSTA 2013
    CityGdansk
    Period13/10/1613/10/18

    ASJC Scopus subject areas

    • Civil and Structural Engineering
    • Building and Construction
    • Architecture

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