Discussion on the Safety Factors of Slopes Recommended for Small Dams

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dc.contributor.authorVrubel, Jancs
dc.contributor.authorŘíha, Jaromírcs
dc.coverage.issue2/2017cs
dc.coverage.volumeVolume 65cs
dc.date.issued2017-03-06cs
dc.description.abstractThe design and assessment of the slope stability of small embankment dams is usually not carried out using slope stability calculations but rather by the comparison of proposed or existing dam slopes with those recommended by technical standards or guidelines. Practical experience shows that in many cases the slopes of small dams are steeper than those recommended. However, most of such steeper slopes at existing dams do not exhibit any visible signs of instability, defects or sliding. For the dam owner and also for dam stability engineers, the safety of the slope, expressed e.g. via a factor of safety, is crucial. The aim of this study is to evaluate the safety margin provided by recommended slopes. The factor of safety was evaluated for several dam shape and layout variants via the shear strength reduction method using PLAXIS software. The study covers various dam geometries, dam core and shoulder positions and parameter values of utilised soils. Three load cases were considered: one with a steady state seepage condition and two with different reservoir water level drawdown velocities – standard and critical. As numerous older small dams lack a drainage system, variants with and without a toe drain were assessed. Calculated factors of safety were compared with required values specified by national standards and guidelines.en
dc.description.abstractPractical experience shows that in many cases the slopes of small dams are steeper than those recommended. However, most of such steeper slopes at existing dams do not exhibit any visible signs of instability, defects or sliding. For the dam owner and also for dam stability engineers, the safety of the slope, expressed e.g. via a factor of safety, is crucial. The aim of this study is to evaluate the safety margin provided by recommended slopes. The factor of safety was evaluated for several dam shape and layout variants via the shear strength reduction method using PLAXIS software. The study covers various dam geometries, dam core and shoulder positions and parameter values of utilised soils. Three load cases were considered: one with a steady state seepage condition and two with different reservoir water level drawdown velocities – standard and critical. As numerous older small dams lack a drainage system, variants with and without a toe drain were assessed. Calculated factors of safety were compared with required values specified by national standards and guidelines.cs
dc.formattextcs
dc.format.extent569-576cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis. 2017, vol. Volume 65, issue 2/2017, p. 569-576.en
dc.identifier.doi10.11118/actaun201765020569cs
dc.identifier.issn1211-8516cs
dc.identifier.orcid0000-0002-1271-3804cs
dc.identifier.orcid0000-0002-1362-5769cs
dc.identifier.other136665cs
dc.identifier.researcheridAAY-4760-2020cs
dc.identifier.scopus25823496100cs
dc.identifier.urihttp://hdl.handle.net/11012/68383
dc.language.isoencs
dc.publisherMendel University Presscs
dc.relation.ispartofActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensiscs
dc.relation.urihttps://acta.mendelu.cz/65/2/0569/cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1211-8516/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectsmall water reservoirsen
dc.subjectslope stabilityen
dc.subjectfactor of safetyen
dc.subjectmalá vodní nádrž
dc.subjectstabilita svahu
dc.subjectbezpečnostní faktor
dc.titleDiscussion on the Safety Factors of Slopes Recommended for Small Damsen
dc.title.alternativePojednání o bezpečnostních faktorech doporučovaných pro svahy malých vodních nádržícs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-136665en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:46:22en
sync.item.modts2025.01.17 15:18:08en
thesis.grantorVysoké učení technické v Brně. Fakulta stavební. Ústav vodních stavebcs
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