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dc.contributor.authorChaudhary, Bikash
dc.contributor.authorPanthi, Krishna Kanta
dc.contributor.authorTrinh, Nghia Quoc
dc.date.accessioned2023-11-20T15:44:21Z
dc.date.available2023-11-20T15:44:21Z
dc.date.created2023-10-17T10:55:48Z
dc.date.issued2023
dc.identifier.isbn978-3-9503898-3-8
dc.identifier.urihttps://hdl.handle.net/11250/3103715
dc.description.abstractConfinement is a pre-requisite in the “Norwegian state-of-art design principles” for unlined pressure tunnels/shafts where the minimum principal stress must exceed internal water pressure. Reliable estimation of in-situ stress state is crucial in implementing unlined pressure tunnels/shafts so that hydraulic jacking/fracturing in the rock mass is avoided. The Norwegian thumb rule may not offer a complete solution in all unlined pressure tunnels/shafts since these are based on the 2D geometry of terrain and thus do not fully represent the in-situ stress environment in 3D. This article evaluates the minimum principal stress state of the unlined headrace system of Bjørnstokk powerplant using 3D numerical modeling. The 3D model is developed with the integration of geological, topographic, and geotectonic features. The model is calibrated using measured in-situ stress data of fixed locations along the waterway system. Discussions are made on how in-situ rock stress differs upon changes in topography and geological setting.en_US
dc.language.isoengen_US
dc.publisherÖsterreichische Gesellschaft für Geomechaniken_US
dc.relation.ispartofProceedings of the ISRM 15th International Congress on Rock Mechanics and Rock Engineering & 72nd Geomechanics Colloquium – Challenges in Rock Mechanics and Rock Engineering
dc.titleAssessment on the in-situ rock stress condition along an unlined pressure tunnel/shaft of a Norwegian Hydropower Project using numerical modelingen_US
dc.title.alternativeAssessment on the in-situ rock stress condition along an unlined pressure tunnel/shaft of a Norwegian Hydropower Project using numerical modelingen_US
dc.typeChapteren_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber1864-1869en_US
dc.identifier.cristin2185428
dc.relation.projectNorges forskningsråd: 257588en_US
cristin.ispublishedtrue
cristin.fulltextoriginal


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