dc.contributor.advisor |
Link Lazo, Óscar Eduardo; supervisor de grado |
es |
dc.contributor.author |
Klischies Nevermann, Kai Oliver |
es |
dc.date.accessioned |
2021-08-13T21:19:32Z |
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dc.date.available |
2021-08-13T21:19:32Z |
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dc.date.issued |
2013 |
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dc.identifier.uri |
http://repositorio.udec.cl/jspui/handle/11594/7517 |
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dc.description |
Tesis para optar al grado de Magíster en Ciencias de la Ingeniería con mención en Ingeniería Civil. |
es |
dc.description.abstract |
Scour at piers embedded in a bed of cohesive sediment mixture was investigated to quantify the effects of bed compaction. Experiments were conducted in a large rectangular laboratory flume, with natural clay sediment collected from a stream located at the Chilean coastal range. Non-intrusive and high-resolution topographic measurements of scoured bed in the vicinity of simulated piers were performed during the experimental runs with a laser distance sensor (LDS) that was traversed by precision step-motors. Measurements were taken by the LDS in different azimuthal half-planes to study the spatio-temporal variation of the topography of evolving scour holes. Experiments were conducted over 40 h, until an advanced stage of scour was reached, with the approaching flow having a bed shear stress equal to 95% of the Shields critical condition for the initiation of motion of sand in a sand-clay mixture. Results show that the bed was scoured in the forms of chunks of aggregates, aggregate-by-aggregate and particle-by-particle with an increase in ratio of actual to Proctor’s optimum molding water content, wˆ . Maximum scour depth was mainly observed at the wake region (on the pier downstream) ranging from 10 to 58% of that in sand-alone case with the same size of the sand fraction in the mixtures. For a given compaction energy, scour depth first decreases with wˆ < 2.6 as fine clay particles are flocculated and increases with wˆ > 2.6 as particles become more dispersed. |
es |
dc.language.iso |
eng |
es |
dc.publisher |
Universidad de Concepción. |
es |
dc.rights |
Creative Commoms CC BY NC ND 4.0 internacional (Atribución-NoComercial-SinDerivadas 4.0 Internacional) |
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dc.rights.uri |
https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es |
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dc.source.uri |
https://go.openathens.net/redirector/udec.cl?url=http://tesisencap.udec.cl/concepcion/klischies_n_k/index.html |
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dc.subject |
Sedimentos Fluviales |
es |
dc.subject |
Floculación |
es |
dc.subject |
Sedimentación |
es |
dc.subject |
Puentes |
es |
dc.subject |
Erosión |
es |
dc.title |
Scour around bridge piers in fluvial sediments. |
es |
dc.type |
Tesis |
es |
dc.description.facultad |
Departamento de Ingeniería Civil |
es |
dc.description.departamento |
Departamento de Ingeniería Civil. |
es |