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Soil Conditions and Shield Tunneling Viability for Bogotá Metro Line 1
Análisis de las Condiciones del Suelo y Viabilidad para la Línea 1 del Metro de Bogotá con Tuneladora
DOI:
https://doi.org/10.15446/ing.investig.99197Keywords:
Congestion cost, Lacustrine deposits, Tunnelling, Bogotá subsoil (en)Costo del congestionamiento vial, Depósitos lacustres, Subsuelo de Bogotá, Construcción de túneles (es)
Bogotá, the capital city of Colombia, has experienced a critical situation regarding its public transport and road network condition. Unfortunately, the city has lacked an analytical long-term evaluation with regard to transport planning and infrastructure that is able to meet the growing demand. The metro system has been planned for more than half a century, and the existing soil investigations have not been fully used to evaluate the feasibility of building a metro in Bogotá’s subsoil. In order to estimate the construction viability of an underground system in the city, the authors studied the ground conditions along the alignment of Metro Line 1, as proposed in 2014. This research brought forward the stratigraphic profile of the first 6,6 km of the alignment. The ground displacements induced by tunneling were estimated by means of a finite element analysis, and the results are presented in this paper along with their significance. The results forecast surface settlements lower than 10 mm, showing that the condition and strength of the soil are suitable for underground metro construction. However, soil consolidation and appropriate monitoring during and after tunneling should be taken under consideration for the sake of the project’s success.
Bogotá, la capital de Colombia, se ha caracterizado por su situación crítica en temas de transporte público y condiciones de conexión vial. Desafortunadamente, la ciudad ha carecido de una evaluación analítica a largo plazo con respecto a la planeación del transporte, así como de una infraestructura que sea capaz de satisfacer la creciente demanda. El sistema metro ha sido planeado por más de medio siglo, y los estudios de suelos existentes no han sido aprovechados en su totalidad para evaluar la viabilidad de construir un metro en el subsuelo de Bogotá. Para estimar la viabilidad de construir un sistema subterráneo en la ciudad, los autores estudiaron las condiciones del suelo a lo largo del trazado de la Línea de Metro 1, tal y como se propuso en 2014. Esta investigación puso de manifiesto la columna estratigráfica de los primeros 6,6 km del trazado. Los desplazamientos del suelo inducidos por la construcción de túneles se estimaron mediante un análisis de elementos finitos, y los resultados se presentan en este artículo en conjunto con su significancia. Los resultados pronostican asentamientos menores a 10 mm, indicando que las condiciones y la resistencia del terreno son aptas para la construcción de un metro subterráneo. Sin embargo, la consolidación del suelo y un monitoreo adecuado durante y después de la construcción de los túneles deben ser consideradas en pro del éxito del proyecto.
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1. Sebastian Rivera, Chunjing Ma, Xian Liu, Z.b. Xu, L. Yu, X. Zhang. (2025). Study of the horizontal propagation of deformations generated by a shaft excavation, from the use of VSM machinery in soft soils in shanghai China. IOP Conference Series: Earth and Environmental Science, 1541(1), p.012011. https://doi.org/10.1088/1755-1315/1541/1/012011.
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Copyright (c) 2023 Diana M. Matta-Diaz, Sebastian Rivera-Pardo, Xian Liu, Yun Bai
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