Soil consolidation associated with grouting during shield tunnelling in soft clayey ground

K. Komiya, K. Soga, Hirokazu Akaki, M. R. Jafari, M. D. Bolton

    Research output: Contribution to journalArticle

    48 Citations (Scopus)

    Abstract

    The effectiveness of grouting to reduce surface settlements during underground construction in clayey ground was investigated by a field trial and laboratory tests. The field trial was carried out during shield tunnelling work conducted in alluvial clay deposits in Koto-ku, Tokyo. Grout was injected at some distance away from the tunnel, and both surface and subsurface settlements above the tunnel were monitored. Although the initial heave was achieved immediately after the grout injection, the ground continued to settle with time, owing to soil consolidation and grout shrinkage. A laboratory investigation was conducted to investigate the parameters that control the long-term behaviour of grouting in clay. It was found that better long-term grout efficiency can be achieved in overconsolidated clay than in normally consolidated clay, and the efficiency increased with increasing injection volume. Finite element analysis of the laboratory experiments confirmed that the amount and extent of excess pore pressures generated during injection govern the long-term grout efficiency. Finite element analysis of the field trial was also performed to simulate the long-term ground deformation after grout injection.

    Original languageEnglish
    Pages (from-to)835-846
    Number of pages12
    JournalGeotechnique
    Volume51
    Issue number10
    DOIs
    Publication statusPublished - 2001 Dec

    Fingerprint

    Grouting
    grout
    grouting
    Consolidation
    consolidation
    shield
    Clay
    Soils
    Tunnels
    Clay deposits
    Finite element method
    clay
    soil
    Pore pressure
    tunnel
    underground construction
    heave
    pore pressure
    Experiments
    trial

    Keywords

    • Clays
    • Consolidation
    • Grouting
    • Laboratory tests
    • Numerical modelling and analysis
    • Tunnels

    ASJC Scopus subject areas

    • Earth and Planetary Sciences (miscellaneous)
    • Geotechnical Engineering and Engineering Geology

    Cite this

    Soil consolidation associated with grouting during shield tunnelling in soft clayey ground. / Komiya, K.; Soga, K.; Akaki, Hirokazu; Jafari, M. R.; Bolton, M. D.

    In: Geotechnique, Vol. 51, No. 10, 12.2001, p. 835-846.

    Research output: Contribution to journalArticle

    Komiya, K. ; Soga, K. ; Akaki, Hirokazu ; Jafari, M. R. ; Bolton, M. D. / Soil consolidation associated with grouting during shield tunnelling in soft clayey ground. In: Geotechnique. 2001 ; Vol. 51, No. 10. pp. 835-846.
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