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dc.contributor.authorChoo, CS
dc.contributor.authorOng, DEL
dc.date.accessioned2019-11-27T02:15:20Z
dc.date.available2019-11-27T02:15:20Z
dc.date.issued2020
dc.identifier.issn0013-7952
dc.identifier.doi10.1016/j.enggeo.2019.105405
dc.identifier.urihttp://hdl.handle.net/10072/389331
dc.description.abstractIn the earlier companion paper (Ong and Choo, 2018), direct shear tests were performed on reconstituted tunneling rock spoils for the development of equivalent tangential cohesion, c't,p and friction angle, ϕ't,p. These equivalent rock strength parameters were used in assessing jacking forces, which were measured from three pipe-jacking drives negotiating the highly weathered lithologies from the Tuang Formation, Malaysia. The measured jacking forces were back-analyzed, leading to the development of frictional coefficient, μavg and the vertical stress at the tunnel crown, σEV. In this paper, the reliability of using the parameters, c't,p, ϕ't,p, μavg and σEV was assessed through the use of three-dimensional finite element modeling of the studied pipe-jacking drives. The peak tangential strength parameters, c't,p and ϕ't,p were applied to the modeled rock mass and the strength parameters of the pipe-rock interface were developed from μavg. Arching ratios were developed from σEV, which were subsequently used for post-analysis assessment of the results from numerical modeling. There was sound agreement between the resulting pipe-rock interface shear stresses, τ1 and reaction loads, ΣFy from the numerical analysis against the field measured jacking forces, thus demonstrating the reliability of the use of developed equivalent rock strength parameters, c't,p, ϕ't,p, μavg and σEV in the assessment of pipe-jacking forces through highly weathered lithologies.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofjournalEngineering Geology
dc.subject.fieldofresearchCivil engineering
dc.subject.fieldofresearchGeomatic engineering
dc.subject.fieldofresearchOther engineering
dc.subject.fieldofresearchcode4005
dc.subject.fieldofresearchcode4013
dc.subject.fieldofresearchcode4099
dc.titleAssessment of non-linear rock strength parameters for the estimation of pipe-jacking forces. Part 2. Numerical modeling
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationChoo, CS; Ong, DEL, Assessment of non-linear rock strength parameters for the estimation of pipe-jacking forces. Part 2. Numerical modeling, Engineering Geology, 2019
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2019-11-25T00:25:03Z
dc.description.versionAccepted Manuscript (AM)
gro.description.notepublicThis publication has been entered into Griffith Research Online as an Advanced Online Version
gro.rights.copyright© 2019 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.
gro.hasfulltextFull Text
gro.griffith.authorOng, Dominic E.L.


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