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Parametric study on the friction angle and dilation angle of intact rock and discontinuities presented in the Siah Bisheh pumping storage hydro-electric power project (HEPP)
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.
2006 (English)In: Proc. Int. Symp. Int. Soc. Rock Mech., Eurock - Eurock Multiphysics Coupling Long Term Behav. Rock Mech., 2006, 637-642 p.Conference paper, Published paper (Refereed)
Abstract [en]

The values of friction angle and dilation angle of rock mass are the effective factors on the visco-elastic displacements around underground structures. The present parametric study was conducted to determine the effect of dilation angle of discontinuities and intact rock, friction angle of discontinuities on the values of visco-elastic displacements based on non-associated flow rule and elasto-viscoplastic theory and statistical Yates method. Elasto-visco plastic analyses of Siah Bisheh Power Cavern have been performed according to non-associated flow rule by FESTO3. In the Yates method, the direct effect and interaction of the concerned parameters on displacements and sensitivity of effects are considered. On the basis of the results, an optimum value can be chosen for the studied parameter. It is found that, the variation of the dilation angle of intact rock and friction angle of discontinuities induced similar variation in the values of displacements, but the sensitivity of these variations is not noticeable. Therefore it is concluded that these parameters are not much effective on the result (visco-plastic displacements). However, changing the dilation angle of discontinuities caused considerable variation in the visco-plastic displacements indicating a direct effect of this parameter on the results. To find out the optimum value of this parameter, the effect of it's variation on the visco-plastic displacement around the cavern is discussed.

Place, publisher, year, edition, pages
2006. 637-642 p.
Series
Proceedings of the International Symposium of the International Society for Rock Mechanics, Eurock 2006 - Eurock 2006 Multiphysics Coupling and Long Term Behaviour in Rock Mechanics
Keyword [en]
ABS resins, Caves, Cements, Electric energy storage, Flow of fluids, Friction, Hydroelectric power, Plastics, Rock mechanics, Rocks, Sensitivity analysis, Statistical methods, Tribology, Underground structures, Associated flow rules, Effective factors, Elastic displacements, Electric powers, Friction angles, Intact rocks, Optimum values, Parametric studies, Plastic displacements, Rock masses, Visco plastics, Mechanics
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-155350Scopus ID: 2-s2.0-55549136072ISBN: 0415410010 (print)ISBN: 9780415410014 (print)OAI: oai:DiVA.org:kth-155350DiVA: diva2:763438
Conference
International Symposium of the International Society for Rock Mechanics, Eurock 2006 - Eurock 2006 Multiphysics Coupling and Long Term Behaviour in Rock Mechanics, 9-12 May 2006, Liege, Belgium
Note

QC 20141114

Available from: 2014-11-14 Created: 2014-11-05 Last updated: 2014-11-14Bibliographically approved

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