• myGriffith
    • Staff portal
    • Contact Us⌄
      • Future student enquiries 1800 677 728
      • Current student enquiries 1800 154 055
      • International enquiries +61 7 3735 6425
      • General enquiries 07 3735 7111
      • Online enquiries
      • Staff phonebook
    View Item 
    •   Home
    • Griffith Research Online
    • Journal articles
    • View Item
    • Home
    • Griffith Research Online
    • Journal articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

  • All of Griffith Research Online
    • Communities & Collections
    • Authors
    • By Issue Date
    • Titles
  • This Collection
    • Authors
    • By Issue Date
    • Titles
  • Statistics

  • Most Popular Items
  • Statistics by Country
  • Most Popular Authors
  • Support

  • Contact us
  • FAQs
  • Admin login

  • Login
  • Assessment of non-linear rock strength parameters for the estimation of pipe-jacking forces part 1. Direct shear testing and backanalysis

    Thumbnail
    View/Open
    OngPUB5311.pdf (2.720Mb)
    File version
    Accepted Manuscript (AM)
    Author(s)
    Ong, DEL
    Choo, CS
    Griffith University Author(s)
    Ong, Dominic E.L.
    Year published
    2018
    Metadata
    Show full item record
    Abstract
    A method of backanalysis was used for the assessment of pipe-jacking forces from three pipe-jacking drives in laminated shale and interbedded lithological units of metagraywacke, siltstone, greywacke and phyllite found in the highly weathered and fractured lithologies of the Tuang Formation (Malaysia). Direct shear tests were conducted on reconstituted tunneling rock spoils sampled from three pipe-jacking sites. The direct shear test results were initially assessed using the Mohr-Coulomb failure criterion, which demonstrated severe shortcomings in capturing the nonlinear shear strength behavior of the reconstituted tunneling ...
    View more >
    A method of backanalysis was used for the assessment of pipe-jacking forces from three pipe-jacking drives in laminated shale and interbedded lithological units of metagraywacke, siltstone, greywacke and phyllite found in the highly weathered and fractured lithologies of the Tuang Formation (Malaysia). Direct shear tests were conducted on reconstituted tunneling rock spoils sampled from three pipe-jacking sites. The direct shear test results were initially assessed using the Mohr-Coulomb failure criterion, which demonstrated severe shortcomings in capturing the nonlinear shear strength behavior of the reconstituted tunneling rock spoils. Subsequently, a simple power law function was proposed together with the generalized tangential method to obtain useful equivalent tangential cohesion, c't,p and friction angle, ϕ’t,p for the assessment of pipe-jacking forces in fractured lithologies. The outcomes from this study show that the tangential Mohr-Coulomb strength parameters can be used to backanalyze the frictional coefficient, μavg and the vertical stress at the tunnel crown, σEV. These backanalyzed values were successfully related back to the measured jacking forces and jacking speeds for pipe-jacking drives in various geological conditions and lubrication efforts. The use of the backanalyzed parameters c't,p, ϕ’t,p, μavg and σEV in the assessment of pipe-jacking forces from highly weathered rocks comprising of laminated and interbedded lithological units could lead to the prediction of jacking forces using numerical models. A companion paper to this study has also been produced to evaluate the reliability and suitability of these backanalyzed parameters for assessing pipe-jacking forces using the finite element method.
    View less >
    Journal Title
    Engineering Geology
    Volume
    244
    DOI
    https://doi.org/10.1016/j.enggeo.2018.07.013
    Copyright Statement
    © 2018 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Structural geology and tectonics
    Civil engineering
    Civil geotechnical engineering
    Construction engineering
    Geomatic engineering
    Other engineering
    Publication URI
    http://hdl.handle.net/10072/380179
    Collection
    • Journal articles

    Footer

    Disclaimer

    • Privacy policy
    • Copyright matters
    • CRICOS Provider - 00233E
    • TEQSA: PRV12076

    Tagline

    • Gold Coast
    • Logan
    • Brisbane - Queensland, Australia
    First Peoples of Australia
    • Aboriginal
    • Torres Strait Islander