Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments
The development of resilient and sustainable cities considers the construction of infrastructure projects that involve deep excavations. During excavations, surface displacements frequently occur that may be inadmissible for previously constructed elements of the urban environment, threatening the s...
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| Format: | Online |
| Language: | spa |
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Universidad Pedagógica y Tecnológica de Colombia
2020
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| Online Access: | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/11373 |
| _version_ | 1801706087995408384 |
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| author | Pineda-Jaimes, Jorge Arturo García-Ubaque, Cesar Augusto Esquivel-Ramírez, Rodrigo Elías |
| author_facet | Pineda-Jaimes, Jorge Arturo García-Ubaque, Cesar Augusto Esquivel-Ramírez, Rodrigo Elías |
| author_sort | Pineda-Jaimes, Jorge Arturo |
| collection | OJS |
| description | The development of resilient and sustainable cities considers the construction of infrastructure projects that involve deep excavations. During excavations, surface displacements frequently occur that may be inadmissible for previously constructed elements of the urban environment, threatening the sustainability of already consolidated sectors. In this article, we present an approximation to the estimation of the geotechnical hazard by deep excavations in soft lacustrine soils of Bogotá, DC, using parametric numerical simulations that sought to establish the probability of occurrence of base bottom heave, and the estimation of surface displacements for variable excavation geometries. A database was consolidated from 85 projects found in geotechnical zones having soft soils in the city. From this base, statistically representative values of shear strength and stiffness were determined, and a statistically representative geotechnical profile of the lacustrine clays was prepared for parametric analyzes. The hazard estimation was developed in three stages: construction of the geotechnical model, approach of hazard scenarios and determination of the hazard level. The following parameters were considered: excavation geometry (base and height), safety factor, failure probability and vertical ground displacements (settlements). Finally, a matrix is presented to determine the hazard level by excavations in the soft soils of Bogotá, whose data provide a prior assessment that contributes to promoting resilience and sustainability of already developed areas. |
| format | Online |
| id | oai:oai.revistas.uptc.edu.co:article-11373 |
| institution | Revista Facultad de Ingeniería |
| language | spa |
| publishDate | 2020 |
| publisher | Universidad Pedagógica y Tecnológica de Colombia |
| record_format | ojs |
| spelling | oai:oai.revistas.uptc.edu.co:article-113732022-06-15T15:57:38Z Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments Aproximación a la estimación de la amenaza geotécnica originada por excavaciones profundas en arcillas de Bogotá: Una contribución a la sustentabilidad en entornos urbanos Pineda-Jaimes, Jorge Arturo García-Ubaque, Cesar Augusto Esquivel-Ramírez, Rodrigo Elías angular distortion bottom heave deep excavations failure probability geotechnical hazard ground settlements lacustrine soils safety factor soft clays subsidence amenaza geotécnica arcillas blandas asentamientos distorsión angular excavaciones profundas factor de seguridad falla de fondo probabilidad de falla subsidencia suelos lacustres The development of resilient and sustainable cities considers the construction of infrastructure projects that involve deep excavations. During excavations, surface displacements frequently occur that may be inadmissible for previously constructed elements of the urban environment, threatening the sustainability of already consolidated sectors. In this article, we present an approximation to the estimation of the geotechnical hazard by deep excavations in soft lacustrine soils of Bogotá, DC, using parametric numerical simulations that sought to establish the probability of occurrence of base bottom heave, and the estimation of surface displacements for variable excavation geometries. A database was consolidated from 85 projects found in geotechnical zones having soft soils in the city. From this base, statistically representative values of shear strength and stiffness were determined, and a statistically representative geotechnical profile of the lacustrine clays was prepared for parametric analyzes. The hazard estimation was developed in three stages: construction of the geotechnical model, approach of hazard scenarios and determination of the hazard level. The following parameters were considered: excavation geometry (base and height), safety factor, failure probability and vertical ground displacements (settlements). Finally, a matrix is presented to determine the hazard level by excavations in the soft soils of Bogotá, whose data provide a prior assessment that contributes to promoting resilience and sustainability of already developed areas. El desarrollo de ciudades resilientes y sustentables considera la construcción de proyectos de infraestructura que involucran excavaciones profundas. Durante las excavaciones, frecuentemente, se producen desplazamientos en la superficie que pueden ser inadmisibles para los elementos previamente construidos del entorno urbano, amenazando la sustentabilidad de sectores ya consolidados. En este artículo, se presenta una aproximación a la estimación de la amenaza geotécnica originada por excavaciones profundas en suelos blandos lacustres de Bogotá, D.C., mediante simulaciones numéricas paramétricas que buscaron establecer la probabilidad de ocurrencia de falla de fondo y la estimación de desplazamientos en superficie para geometrías variables de la excavación. Se consolidó una base de datos a partir de 85 proyectos localizados en zonas geotécnicas que contienen suelos blandos en la ciudad. A partir de esta base, se determinaron valores estadísticamente representativos de las propiedades de resistencia y rigidez y se elaboró un perfil geotécnico de las arcillas lacustres para los análisis paramétricos. La estimación de la amenaza se desarrolló en tres fases: construcción del modelo geotécnico, planteamiento de los escenarios de amenaza y determinación del nivel de amenaza. Se tuvieron en cuenta los siguientes parámetros: geometría de la excavación (base y altura), factor de seguridad, probabilidad de falla y desplazamientos verticales en superficie (asentamientos). Finalmente, se presenta una matriz de aproximación para determinar las implicaciones y el nivel de amenaza que presentan las excavaciones en los suelos blandos de Bogotá, cuyos datos proporcionan una valoración previa en las etapas de factibilidad de un proyecto de excavación que contribuye a favorecer la resiliencia y sustentabilidad de las zonas ya desarrolladas. Universidad Pedagógica y Tecnológica de Colombia 2020-08-19 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf application/xml https://revistas.uptc.edu.co/index.php/ingenieria/article/view/11373 10.19053/01211129.v29.n54.2020.11373 Revista Facultad de Ingeniería; Vol. 29 No. 54 (2020): Continuos Publication; e11373 Revista Facultad de Ingeniería; Vol. 29 Núm. 54 (2020): Publicación Continua; e11373 2357-5328 0121-1129 spa https://revistas.uptc.edu.co/index.php/ingenieria/article/view/11373/9532 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/11373/10003 Copyright (c) 2020 Jorge Arturo Pineda-Jaimes, Ph. D., Cesar Augusto García-Ubaque, Ph. D., Rodrigo Elías Esquivel-Ramírez, M.Sc. (c) |
| spellingShingle | angular distortion bottom heave deep excavations failure probability geotechnical hazard ground settlements lacustrine soils safety factor soft clays subsidence amenaza geotécnica arcillas blandas asentamientos distorsión angular excavaciones profundas factor de seguridad falla de fondo probabilidad de falla subsidencia suelos lacustres Pineda-Jaimes, Jorge Arturo García-Ubaque, Cesar Augusto Esquivel-Ramírez, Rodrigo Elías Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments |
| title | Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments |
| title_alt | Aproximación a la estimación de la amenaza geotécnica originada por excavaciones profundas en arcillas de Bogotá: Una contribución a la sustentabilidad en entornos urbanos |
| title_full | Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments |
| title_fullStr | Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments |
| title_full_unstemmed | Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments |
| title_short | Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments |
| title_sort | assessment of geotechnical hazard due to deep excavations in bogota clays a contribution for sustainability in urban environments |
| topic | angular distortion bottom heave deep excavations failure probability geotechnical hazard ground settlements lacustrine soils safety factor soft clays subsidence amenaza geotécnica arcillas blandas asentamientos distorsión angular excavaciones profundas factor de seguridad falla de fondo probabilidad de falla subsidencia suelos lacustres |
| topic_facet | angular distortion bottom heave deep excavations failure probability geotechnical hazard ground settlements lacustrine soils safety factor soft clays subsidence amenaza geotécnica arcillas blandas asentamientos distorsión angular excavaciones profundas factor de seguridad falla de fondo probabilidad de falla subsidencia suelos lacustres |
| url | https://revistas.uptc.edu.co/index.php/ingenieria/article/view/11373 |
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