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dc.contributor.authorOng, DEL
dc.contributor.authorChoo, CS
dc.date.accessioned2018-07-06T12:30:21Z
dc.date.available2018-07-06T12:30:21Z
dc.date.issued2016
dc.identifier.issn0886-7798
dc.identifier.doi10.1016/j.tust.2015.10.014
dc.identifier.urihttp://hdl.handle.net/10072/375724
dc.description.abstractPrediction of jacking forces has been well-established for pipe-jacking drives traversing soils. However, the accrual of jacking forces for drives negotiating weathered rock formations has not been well understood. Three pipe-jacking drives in Kuching City, Malaysia spanning weathered lithological units of sandstone, phyllite and shale were studied. In the absence of in-situ pressuremeter testing during the investigation stage, tunneling rock spoils were collected and characterized through direct shear testing. The “generalized tangential” technique was applied to the nonlinear direct shear test results to obtain linear Mohr–Coulomb parameters, c′p and ϕ′p. This allowed for back-analysis of frictional coefficient, μavg through the use of a well-established predictive jacking force model. The reliability of using c′p, ϕ′p and μavg was assessed through 3D finite element modeling of the studied pipe-jacking drives. Based on these parameters, the results obtained from the numerical analyses of the studied pipe-jacking drives show good agreement with the jacking forces measured in-situ. The outcome of this research demonstrates that the derived strength parameters from direct shear testing of tunneling rock spoils has the potential to be used as reliable input parameters in finite element modeling to predict pipe-jacking forces in highly weathered geological formations.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto10
dc.relation.ispartofjournalTunnelling and Underground Space Technology
dc.relation.ispartofvolume51
dc.subject.fieldofresearchCivil Geotechnical Engineering
dc.subject.fieldofresearchCivil Engineering
dc.subject.fieldofresearchResources Engineering and Extractive Metallurgy
dc.subject.fieldofresearchcode090501
dc.subject.fieldofresearchcode0905
dc.subject.fieldofresearchcode0914
dc.titleBack-analysis and finite element modeling of jacking forces in weathered rocks
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dcterms.licensehttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2016 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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