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| dc.contributor.advisor | Link Lazo, Óscar Eduardo | es |
| dc.contributor.author | Klischies Nevermann, Kai Oliver | es |
| dc.date.accessioned | 2021-08-13T21:19:32Z | |
| dc.date.accessioned | 2024-08-28T20:08:31Z | |
| dc.date.available | 2021-08-13T21:19:32Z | |
| dc.date.available | 2024-08-28T20:08:31Z | |
| dc.date.issued | 2013 | |
| dc.description | Tesis presentada 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. | en |
| dc.description.campus | Concepción | es |
| dc.description.departamento | Departamento de Ingeniería Civil | es |
| dc.description.facultad | Facultad de Ingeniería | es |
| dc.identifier.uri | https://repositorio.udec.cl/handle/11594/7517 | |
| dc.language.iso | es | es |
| dc.publisher | Universidad de Concepción | es |
| dc.rights | CC BY-NC-ND 4.0 DEED Attribution-NonCommercial-NoDerivs 4.0 International | en |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.source.uri | https://go.openathens.net/redirector/udec.cl?url=http://tesisencap.udec.cl/concepcion/klischies_n_k/index.html | |
| dc.subject | Sedimentos Fluviales | es |
| dc.subject | Floculación | es |
| dc.subject | Sedimentación | es |
| dc.subject | Puentes | es |
| dc.subject | Erosión | es |
| dc.title.alternative | Scour around bridge piers in fluvial sediments. | en |
| dc.type | Tesis | es |