Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments

IF 0.9 Q3 ENGINEERING, MULTIDISCIPLINARY

Revista Facultad De Ingenieria-universidad De Antioquia Pub Date : 2020-08-19 DOI:10.19053/01211129.v29.n54.2020.11373

J. Pineda-Jaimes, C. García-Ubaque, Rodrigo Elías Esquivel-Ramírez

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Abstract

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 1 Ph. D. Universidad Distrital “Francisco José de Caldas” (Bogotá-Distrito Capital, Colombia). japinedaj@udistrital.edu.co. ORCID: 0000-0002-0953-9745 2 Ph. D. Universidad Distrital “Francisco José de Caldas” (Bogotá-Distrito Capital, Colombia). cagarciau@udistrital.edu.co. ORCID: 0000-0002-1825-0097 3 M. Sc. (c). Universidad Distrital “Francisco José de Caldas” (Bogotá-Distrito Capital, Colombia). resquivel@udistrital.edu.co. ORCID: 0000-0002-6048-7098 Assessment of Geotechnical Hazard due to Deep Excavations in Bogota Clays: A Contribution for Sustainability in Urban Environments Revista Facultad de Ingeniería (Rev. Fac. Ing.) Vol. 29 (54), e10892. 2020. Tunja-Boyacá, Colombia. L-ISSN: 0121-1129, e-ISSN: 2357-5328, DOI: https://doi.org/10.19053/01211129.v29.n54.2020.11373 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.

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波哥大粘土深开挖岩土工程危害评价:对城市环境可持续性的贡献

弹性和可持续城市的发展考虑到涉及深度挖掘的基础设施项目的建设。在挖掘过程中，地表经常发生位移，这可能是以前建造的城市环境要素所不能接受的，威胁到已经巩固的部分的可持续性。在这篇文章中，我们提出了波哥大软湖土中深开挖岩土工程危害估计的近似值，使用参数数值模拟，试图建立基础底部隆起发生的概率，以及对可变开挖几何形状的表面位移的估计。从城市软土的岩土工区发现的85个项目中合并了一个数据库。在此基础上，确定了具有统计代表性的抗剪强度和刚度值，并编制了具有统计代表性的湖相粘土岩土剖面进行参数分析。灾害估计分三个阶段进行:岩土模型的构建、灾害情景的方法和“Francisco jos de Caldas”大学区博士学位1 (Bogotá-Distrito，哥伦比亚首都)。japinedaj@udistrital.edu.co。ORCID: 0000-0002-0953-9745 2 phd . universsidad distriital“Francisco josise de Caldas”(Bogotá-Distrito Capital, columbia)。cagarciau@udistrital.edu.co。ORCID: 0000-0002-1825-0097 3 m.s c. Universidad distriital“Francisco jos de Caldas”(Bogotá-Distrito Capital, columbia)。resquivel@udistrital.edu.co。地质与工程学报，2000,21(2):444 - 444。荷兰国际集团(Ing))。Vol. 29 (54)， e10892。2020. Tunja-Boyaca,哥伦比亚。L-ISSN: 0121-1129, e-ISSN: 2357-5328, DOI: https://doi.org/10.19053/01211129.v29.n54.2020.11373危害等级的测定。考虑开挖几何形状(基底和高度)、安全系数、破坏概率和地面垂直位移(沉降)等参数。最后，提出了一个矩阵来确定波哥大软土中挖掘的危害程度，其数据提供了一个预先评估，有助于促进已开发地区的恢复力和可持续性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Facultad De Ingenieria-universidad De Antioquia 工程技术-工程：综合

CiteScore

2.00

自引率

0.00%

发文量

审稿时长

2 months

期刊介绍： Revista Facultad de Ingenieria started in 1984 and is a publication of the School of Engineering at the University of Antioquia. The main objective of the journal is to promote and stimulate the publishing of national and international scientific research results. The journal publishes original articles, resulting from scientific research, experimental and or simulation studies in engineering sciences, technology, and similar disciplines (Electronics, Telecommunications, Bioengineering, Biotechnology, Electrical, Computer Science, Mechanical, Chemical, Environmental, Materials, Sanitary, Civil and Industrial Engineering). In exceptional cases, the journal will publish insightful articles related to current important subjects, or revision articles representing a significant contribution to the contextualization of the state of the art in a known relevant topic. Case reports will only be published when those cases are related to studies in which the validity of a methodology is being proven for the first time, or when a significant contribution to the knowledge of an unexplored system can be proven. All published articles have undergone a peer review process, carried out by experts recognized for their knowledge and contributions to the relevant field. To adapt the Journal to international standards and to promote the visibility of the published articles; and therefore, to have a greater impact in the global academic community, after November 1st 2013, the journal will accept only manuscripts written in English for reviewing and publication. Revista Facultad de Ingeniería –redin is entirely financed by University of Antioquia Since 2015, every article accepted for publication in the journal is assigned a DOI number.