Evaluación de la anisotropía de un suelo cohesivo reconstituido en laboratorio mediante la resistencia no drenada obtenida de ensayos no confinado

Evaluation of the anisotropy of a cohesive soil reconstructed in the laboratory by means of the undrained resistance obtained from unconfined tests

dc.contributorRuge Cárdenas, Juan Carlos
dc.creatorPérez Bejarano, Marcela Carolina
dc.date2023-06-22T14:26:21Z
dc.date2023-06-22T14:26:21Z
dc.date2022-12-13
dc.date.accessioned2023-09-06T17:52:52Z
dc.date.available2023-09-06T17:52:52Z
dc.identifierhttp://hdl.handle.net/10654/44640
dc.identifierinstname:Universidad Militar Nueva Granada
dc.identifierreponame:Repositorio Institucional Universidad Militar Nueva Granada
dc.identifierrepourl:https://repository.unimilitar.edu.co
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8693271
dc.descriptionLa anisotropía en cualquier condición está relacionada con la dependencia a la homogeneidad direccional que posee un sistema. En capas geológicas, esta anisotropía posee un vínculo muy estrecho con la dirección deposicional, la cual determina, en gran parte, la fábrica nativa del material tactoide. En suelos arcillosos este factor es aún más influyente, debido al carácter laminar de la microestructura de este tipo de materiales. Razón por la cual, es indispensable conocer la respuesta de suelos arcillosos, cuando se imponen trayectorias de esfuerzos en sentidos diferentes a los generados en la dirección natural de su consolidación. En términos meramente ingenieriles, los materiales anisotrópicos son aquellos que presentan diferentes propiedades mecánicas, de acuerdo con las distintas direcciones en que se realice su análisis. Por lo anterior, se pretende evaluar el comportamiento de los suelos, cuando exhiben una anisotropía inducida al ser sometidos a una carga en diferentes direcciones, con el fin de identificar las variaciones que pueden llegar a presentar en su resistencia al corte. Por lo general, los suelos arcillosos en el contexto colombiano han sido analizados ampliamente con estándares que ayudan a identificar y caracterizar su comportamiento convencional, como medio isotrópico convencional. Sin embargo, la anisotropía de estos suelos se ha estudiado muy poco, considerándolos generalmente como isotrópicos y estimando que tienen idénticas propiedades en todas sus direcciones. El presente estudio genera un aporte al nuevo conocimiento en esta temática, evaluando la variación en los parámetros de compresión inconfinada, de acuerdo con la anisotropía de los suelos cohesivos. Para tal fin se realizarán ensayos de compresión inconfinada en muestras cohesivas reconstituidas a diferentes esfuerzos de preconsolidación. La anisotropía inducida también será considerada en el momento del muestreo, el cual será realizado a diferentes inclinaciones sobre los bloques reconstituidos. Con el estudio actual, se permitirá concluir el comportamiento que tendrán los suelos arcillosos al ser sometidos a diferentes cargas en distintas direcciones a la preconsolidación, mediante los ensayos realizados de compresión inconfinada.
dc.descriptionResumen ............................................................................................................................................ ix 1. Introducción ..................................................................................................................................... 1 1.1 Planteamiento del tema ................................................................................................................. 3 1.2 Justificación del proyecto ............................................................................................................... 5 2. Objetivos .......................................................................................................................................... 6 2.1 Objetivo general.............................................................................................................................. 6 2.2 Objetivos específicos...................................................................................................................... 6 2.2.1 Objetivos específicos .................................................................................................................. 6 3. Marco Referencial ............................................................................................................................ 6 3.1 Marco legal ..................................................................................................................................... 6 3.2 Marco conceptual ........................................................................................................................... 7 3.2.1 ¿Qué es la anisotropía? .............................................................................................................. 8 3.2.2 Influencia de la anisotropía en propiedades del suelo................................................................ 11 3.2.3 Ensayo de compresión inconfinada ........................................................................................... 15 3.3 Marco teórico ................................................................................................................................ 17 3.3.1 Anisotropía en aspectos geotécnicos ........................................................................................ 17 3.3.1.1 Trayectorias de esfuerzo ........................................................................................................ 19 3.3.1.2 Estado de esfuerzos in-situ .................................................................................................... 19 3.3.1.3 Módulo de elasticidad ............................................................................................................. 21 3.3.1.4 Cohesión ................................................................................................................................. 25 3.3.1.5 Ángulo de fricción interna ........................................................................................................ 28 3.3.2 Anisotropía en suelos no saturados .............................................................................................31 4. Materiales y Métodos .......................................................................................................................35 4.1 Caracterización de materiales ....................................................................................................... 35 4.1.1 Ensayos índice ........................................................................................................................... 36 4.2 Reconstitución de muestras .......................................................................................................... 37 4.3 Ensayos de compresión inconfinada ............................................................................................. 38 5. Resultados y discusión .................................................................................................................... 39 5.1 Ensayos para cuantificar la influencia de la anisotropía en la resistencia al corte no drenada...... 39 5.1.1 Ensayos de compresión inconfinada .......................................................................................... 39 6. Conclusiones, recomendaciones, limitaciones y prospectiva .......................................................... 47 Conclusiones ........................................................................................................................................ 47 Recomendaciones ................................................................................................................................ 48 Limitaciones .......................................................................................................................................... 49 7. Referencias ....................................................................................................................................... 50
dc.descriptionThe anisotropy in any condition is related to the dependence on the directional homogeneity that a system possesses. In geological layers, this anisotropy has a very close link with the depositional direction, which largely determines the native fabric of the tactoid material. In clay soils this factor is even more influential, due to the laminar nature of the microstructure of this type of material. For this reason, it is essential to know the response of clay soils, when stress paths are imposed in directions different from those generated in the natural direction of their consolidation. In purely engineering terms, anisotropic materials are those that have different mechanical properties, according to the different directions in which their analysis is carried out. Therefore, it is intended to evaluate the behavior of soils, when they exhibit an induced anisotropy when subjected to a load in different directions, in order to identify the variations that they may present in their shear strength. In general, clay soils in the Colombian context have been extensively analyzed with standards that help identify and characterize their conventional behavior. However, the anisotropy of these soils has been studied very little, generally considering them to be isotropic and estimating that they have identical properties in all directions. The present study generates a contribution to the new knowledge on this subject, trying to evaluate the variation in the parameters of unconfined compression, according to the anisotropy of cohesive soils. For this purpose, unconfined compression tests will be carried out on reconstituted cohesive samples at different preconsolidation stresses. The induced anisotropy will be considered at the time of sampling, which will be carried out at different inclinations on the reconstituted blocks. With the current study, it will be possible to conclude the behavior that clayey soils will have when subjected to different loads in different directions to preconsolidation, through unconfined compression tests.
dc.descriptionMaestría
dc.formatapplicaction/pdf
dc.formatapplication/pdf
dc.languagespa
dc.publisherMaestría en Ingeniería Civil
dc.publisherFacultad de Ingeniería
dc.publisherUniversidad Militar Nueva Granada
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dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://purl.org/coar/access_right/c_abf2
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rightsAcceso abierto
dc.subjectARCILLA
dc.subjectRESISTENCIA DE SUELOS AL ESFUERZO DE CORTE
dc.subjectClays
dc.subjectShear strength
dc.subjectUnconfined compression
dc.subjectReconstituted samples
dc.subjectAnisotropic
dc.subjectArcillas
dc.subjectResistencia al corte
dc.subjectCompresión inconfinada
dc.subjectMuestras reconstituidas
dc.subjectAnisotropia
dc.titleEvaluación de la anisotropía de un suelo cohesivo reconstituido en laboratorio mediante la resistencia no drenada obtenida de ensayos no confinado
dc.titleEvaluation of the anisotropy of a cohesive soil reconstructed in the laboratory by means of the undrained resistance obtained from unconfined tests
dc.typeTesis/Trabajo de grado - Monografía - Maestría
dc.typeinfo:eu-repo/semantics/masterThesis
dc.typehttp://purl.org/coar/resource_type/c_bdcc
dc.typeinfo:eu-repo/semantics/acceptedVersion
dc.coverageCalle 100


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