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dc.contributor.authorPan, Yii-Wenen_US
dc.contributor.authorLi, Kuo-Weien_US
dc.contributor.authorLiao, Jyh-Jongen_US
dc.date.accessioned2014-12-08T15:35:25Z-
dc.date.available2014-12-08T15:35:25Z-
dc.date.issued2014-03-13en_US
dc.identifier.issn0013-7952en_US
dc.identifier.urihttp://dx.doi.org/10.1016/j.enggeo.2013.12.008en_US
dc.identifier.urihttp://hdl.handle.net/11536/23981-
dc.description.abstractPlucking (removal of rock blocks) is often the dominant mechanism for producing a scour hole on riverbeds comprised of heavily jointed rocic masses being subjected to pressure fluctuations from a jet flow. This paper explores the mechanics and response of a surface block subjected to pressure fluctuations. First a particle-flow simulation was conducted to demonstrate how repeated pressure fluctuations are able to gradually remove rock bridges in discontinuities surrounding a rock block, if a pressure fluctuation's intensity is substantial. As a consequence, these weak planes may become fully persistent. The block's uplift speed then depends on the pressure differences on the opposite (horizontal) faces, and the frictional resistance of the lateral discontinuities. This paper proposes a theoretical framework to model the mechanics and response of a rock block subjected to a sinusoidal pressure fluctuation. This model can be applied to estimate the development of a scour hole, through plucking, during a specific flood event. An example demonstrates the applicability of the proposed approach in predicting the potential depth of the scour hole. (C) 2013 Elsevier B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectJointed rock massesen_US
dc.subjectPluckingen_US
dc.subjectScour holeen_US
dc.subjectPlunge poolen_US
dc.subjectUpliften_US
dc.subjectRock riverbeden_US
dc.titleMechanics and response of a surface rock block subjected to pressure fluctuations: A plucking model and its applicationen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.enggeo.2013.12.008en_US
dc.identifier.journalENGINEERING GEOLOGYen_US
dc.citation.volume171en_US
dc.citation.issueen_US
dc.citation.spage1en_US
dc.citation.epage10en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000332442200001-
dc.citation.woscount1-
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