Damage probability assessment for adjoining buildings to deep excavations in soft soils

Sainea-Vargas, C. J.; Torres-Suárez, M. C.

doi:10.1080/19386362.2019.1680486

Cited by 9 publications

(2 citation statements)

References 19 publications

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“…Issa et al introduced and further applied a method to support decision makers to distinguish various deep excavation support systems (DESSs) in construction projects [20]. Oliveira et al and Sainea-Vargas et al conducted case analyses on the adjacent construction based on geotechnical engineering [21,22]. In order to meet the minimum damage requirements of nearby buildings, Aswathy et al proposed a solid and economic support scheme [23].…”

Section: Previous Researchmentioning

confidence: 99%

Experimental Investigation of h-Type Supporting System for Excavation beneath Existing Underground Space

Yang

Wang

et al. 2022

Buildings

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A double-row pile support system combined with existing and additional support piles offers an effective solution for further excavation beneath existing underground space. A large-scale test chamber was therefore built to simulate the whole construction process of underground space extension. Several parallel tests are conducted through observation, data monitoring, and analysis to study the influence of several parameters on an h-type support system containing double-row piles. The relevant parameters include pile row spacing, pile length ratio, pile-head constraint, and in-service foundation pile. The tests reveal that a significant load-transfer effect is generated between the pile rows, and increasing the spacing between pile rows within a certain range can lead to a more reasonable distribution of bending moments and pile force. The displacement of the pile top and its rate of increase are directly proportional to excavation depth, and additional excavation to the bottom of the back-row piles tends to be a critical point, after which the deformation will be significant. The stability of the system varies inversely with the reduction in pile length ratio, but is positively related to the existing pile-head constraint. Furthermore, in-service foundation piles can result in increased bending moments and reduced displacement of the pile top. Finally, the rationality of the model test results was verified according to the numerical simulation and the stability of the double-row piles support system was calculated.

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Section: Previous Researchmentioning

confidence: 99%

Experimental Investigation of h-Type Supporting System for Excavation beneath Existing Underground Space

Yang

Wang

et al. 2022

Buildings

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“…Entre los aspectos en los cuales se requiere un mayor entendimiento en proyectos de excavación se encuentran la estimación de desplazamientos en superficie del terreno, la amenaza y probabilidad de daño de los elementos en superficie [7][8]. A pesar del grado de sofisticación de los modelos de simulación y la implementación de análisis estocásticos para mejorar la predicción de la probabilidad de daños en superficie que han sido implementados paulatinamente en nuestro medio [6,[8][9], son pocos los intentos que se han realizado para evaluar la amenaza geotécnica, de origen antrópico, que causan tanto los desplazamientos inducidos por los procesos constructivos de estructuras subterráneas, como los procesos de movilización de resistencia al corte de las arcillas durante las excavaciones, sobre diferentes elementos del entorno urbano.…”

Section: Introductionunclassified

Aproximación a la estimación de la amenaza geotécnica originada por excavaciones profundas en arcillas de Bogotá: Una contribución a la sustentabilidad en entornos urbanos

2020

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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.

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Random Field-Based Numerical Modeling of Deep Excavation in Soft Soils for Adjacent Building Damage Probability Assessment

Sainea-Vargas

Torres-Suárez

2021

Challenges and Innovations in Geomechanics

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Damage probability assessment for adjoining buildings to deep excavations in soft soils

Cited by 9 publications

References 19 publications

Experimental Investigation of h-Type Supporting System for Excavation beneath Existing Underground Space

Experimental Investigation of h-Type Supporting System for Excavation beneath Existing Underground Space

Aproximación a la estimación de la amenaza geotécnica originada por excavaciones profundas en arcillas de Bogotá: Una contribución a la sustentabilidad en entornos urbanos

Random Field-Based Numerical Modeling of Deep Excavation in Soft Soils for Adjacent Building Damage Probability Assessment

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