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dc.contributor.authorBasnet, Chhatra Bahadur
dc.contributor.authorPanthi, Krishna Kanta
dc.date.accessioned2018-02-27T14:44:52Z
dc.date.available2018-02-27T14:44:52Z
dc.date.created2018-02-07T16:25:10Z
dc.date.issued2018
dc.identifier.citationJournal of Rock Mechanics and Geotechnical Engineering. 2018, 10 (1), 42-59.nb_NO
dc.identifier.issn1674-7755
dc.identifier.urihttp://hdl.handle.net/11250/2487484
dc.description.abstractMost of the existing roughness estimation methods for water tunnels are related to either unlined or concrete/steel-lined tunnels. With the improvement in shotcrete technology, advancement in tunneling equipment and cost and time effectiveness, future water tunnels built for hydropower projects will consist of rock support with the extensive use of shotcrete lining in combination with systematic bolting and concrete lining in the tunnel invert. However, very little research has been performed to find out tunnel surface roughness for shotcrete-lined tunnels with invert concrete, which is important in calculating overall head loss along the waterway system to achieve an optimum and economic hydropower plant design. Hence, the main aim of this article is to review prevailing methods available to calculate tunnel wall roughness, and to use existing methods of head loss calculation to back-calculate roughness of the shotcrete-lined tunnels with invert concrete by exploiting measured head loss and actual cross-sectional profiles of two headrace tunnels from Nepal. Furthermore, the article aims to establish a link between the Manning coefficient and the physical roughness of the shotcrete-lined tunnel with invert concrete and to establish a link between over-break thickness and physical roughness. Attempts are also made to find a correlation between over-break thickness and rock mass quality described by Q-system and discussions are conducted on the potential cost savings that can be made if concrete lining is replaced by shotcrete lining with invert concrete.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.relation.urihttps://authors.elsevier.com/sd/article/S1674-7755(17)30134-8
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.titleRoughness evaluation in shotcrete-lined water tunnels with invert concrete based on cases from Nepalnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.pagenumber42-59nb_NO
dc.source.volume10nb_NO
dc.source.journalJournal of Rock Mechanics and Geotechnical Engineeringnb_NO
dc.source.issue1nb_NO
dc.identifier.doihttps://doi.org/10.1016/j.jrmge.2017.07.006
dc.identifier.cristin1562960
dc.relation.projectNorges forskningsråd: 257588nb_NO
dc.description.localcode© 2017 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).nb_NO
cristin.unitcode194,64,90,0
cristin.unitnameInstitutt for geovitenskap og petroleum
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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