Performance of a pavement foundation system based on the partial compensation of masses method

Ossa, Alexandra; Botero, Eduardo Uribe; Madrigal, María Clara Madrigal; Ovando, E.; Mendoza, Manuel J.; López-Acosta, Norma Patricia

doi:10.1016/j.sandf.2018.12.007

Cited by 10 publications

(7 citation statements)

References 15 publications

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“…En esta etapa es necesario contar con resultados experimentales (mediciones de campo o laboratorio) a partir de los cuales se ajustan los parámetros de entrada del modelo. Esta práctica es utilizada con mucha frecuencia en el diseño geotécnico de varios tipos de proyectos, tales como: diseño de pavimentos (Ossa et al, 2019), estabilidad de taludes (Mandal et al, 2017), cimentación…”

Section: Retro Análisis Y Observación Del Comportamiento Esfuerzo-def...unclassified

Comportamiento esfuerzo-deformación del suelo: Evolución e Importancia

Chamorro-Zurita¹,

Fernández-Lavín²

2022

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Los modelos que emplean elemento finito son ampliamente usados en la Ingeniería Geotécnica para investigar el comportamiento esfuerzo–deformación del suelo en condiciones tanto estáticas como dinámicas. En la práctica algunos modelos constitutivos no incluyen aspectos importantes como son: la no linealidad de la rigidez en el estado de esfuerzos, la anisotropía, la dependencia del endurecimiento plástico en las deformaciones volumétricas y tampoco el efecto de la historia de esfuerzos reciente. Si bien el uso de paquetes computacionales se ha popularizado en las últimas décadas, el conocimiento de los modelos constitutivos, la adecuada selección de los parámetros de entrada y la pericia del modelador juegan un papel muy importante. Este trabajo inicia con la definición de trayectorias de esfuerzo y de la teoría del estado crítico como fundamento para el desarrollo de los diferentes modelos constitutivos (de los cuales se hace un breve recuento). Además, se abordan otros temas como: la obtención en laboratorio de los parámetros mecánicos necesarios para el modelado, la influencia del modelo utilizado y el uso del retro análisis. Finalmente, se ejemplifica la importancia de la adecuada selección del modelo numérico y de los datos de entrada en la obtención de resultados a través de casos sencillos. Artículo recibido: 20 de agosto de 2021 Artículo aceptado: 20 de diciembre de 2021

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Section: Retro Análisis Y Observación Del Comportamiento Esfuerzo-def...unclassified

Comportamiento esfuerzo-deformación del suelo: Evolución e Importancia

Chamorro-Zurita¹,

Fernández-Lavín²

2022

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“…The numerical section in this paper required knowledge of soil properties at greater depths than studied in this CPT analysis. Additional details of soil properties and stratification (up to a depth of 60 m) were obtained from the mentioned sources ( 1–3 , 21 ). A schematic describing major soil layers encountered under the surface of the LT basin is provided later in the manuscript.…”

Section: Site Details and Materials Characterizationmentioning

confidence: 99%

“…The soils encountered in the bed of the former Lake Texcoco (LT) are mainly composed of highly plastic lacustrine clays and are considered unique among the soils found on earth. To construct any infrastructure on these soils can be cumbersome given their adverse engineering properties, such as high compressibility, low shear strength, and extremely high moisture content ( 1 – 3 ). To add to this, Mexico City is situated in a highly seismic area, which increases the risk of excessive consolidation under earthquake loads.…”

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confidence: 99%

“…Inspired by this technique, Rodríguez-Rebolledo ( 6 ) suggested the use of point-bearing piles extended up to the hard layer in the LT strata to facilitate heavy infrastructural projects. This hard soil layer is routinely observed across cone penetration test (CPT) studies on the LT soils at various depths, in this case, ~30 m from the top surface ( 1 , 3 , 7 ). The loads can be transmitted to this soil layer by utilizing a specialized technique such as deep mixing columns.…”

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confidence: 99%

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Lime Treatment of Lake Texcoco Clays with Some Insights on the Application of Deep Mixing Columns

Naik

Akula

Hariharan³

et al. 2022

Transportation Research Record: Journal of the Transportation R

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The soils across Lake Texcoco (LT) basin are notorious for the presence of highly compressible salt-affected lacustrine clays. The geological formation of the area accompanied by the unmonitored flow of water from Mexico City region has resulted in a unique sodium-rich clay that is highly plastic (plasticity index~200), and impermeable ( k~1.5 × 10−9 m/s) and possesses low compressive strength (unconfined compressive strength < 10 kPa). Over the last few decades, the entire basin has settled at an average of 13.2 cm per year and will continue further with increased loads as a result of rapid urbanization. In planning a solid foundation for the airport, as well as developing the surrounding area, trial sections were built to analyze the effect of quicklime (CaO) on the natural clay s physical, chemical, and engineering properties through laboratory testing. The lab-scale investigations were accompanied with field measurements using the variable energy dynamic cone penetrometer (DCP) and plate load tests. Additionally, a numerical analysis of the effect of deep mixed columns (DMC) to reduce consolidation settlement was performed. The numerical analysis comprised of various DMC stabilizers, loading pressures, column lengths, and area replacement ratios. DMC lengths were observed to be the most dominant parameter to reduce consolidation settlements. Settlement reduction was more sensitive to the area replacement ratio for end-bearing columns, and to the loading pressures for floating columns. Based on the stabilizers evaluated, a combination lime and Portland cement performed the best across all loading pressures and column lengths. Other stabilizer combinations also had a remarkable effect on limiting the consolidation settlement.

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“…Most of Mexico City is settled on lacustrine soils in which large amounts of volcanic ash and other pyroclastic materials were deposited (Marsal 1969;Mesri 1975;Romo et al 1988;Santoyo 2005;Ovando et al 2007;Ossa et al 2019). Over time, chemical degradation of these materials formed clays and clayey silts that are characterized by their high water content, compressibility and low shear strength (Bard et al 1988;Ovando et al 2003Ovando et al , 2007Ovando et al , 2013Ossa et al 2019). Exploitation of the aquifer underlying these clay deposits began in the mid-19th century to supply water to city's population (Ovando et al 2003;Santoyo et al 2005;Ovando et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Space-Time Model to Predict The Evolution of the Regional Subsidence in The Lacustrine Zone of Mexico City

Madrigal-Madrigal

Botero

Díaz-Ávalos

2021

Preprint

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In several scientific and engineering disciplines, models have been used to understand the behavior of dynamic processes that evolve in space and in time by providing a probabilistic framework to analyzing the available information. The geostatistical tools used to analyze space-time data are based on established statistical methods, where time is considered as an additional dimension. These models have become very useful in fields such as meteorology, hydrology, ecology, geosciences, and environmental sciences, among others. Subsidence generated by the intense extraction of groundwater in a region is a dynamic phenomenon that manifests itself through the sinking of the ground surface, leading to significant settling in buildings and public utilities as well as cracks in roads. Since the regional subsidence of Mexico City is one of the most representative cases of this type in the world, in this work a model with a full grid space-time layout (STF) is used to analyze and predict the evolution of this phenomenon in the city, taking into account a monitoring system composed of 1931 surface benchmarks. Results show that the separable variogram model was the one that best represented the spatial and temporal correlation of the phenomenon in the area of study. In addition, the differences between the registered ground elevation made in 2016 and those estimated by the space-time model for the same year, were less than 1.00 m. This implies that in general accurate ground elevation values and subsidence rates can be obtained from the proposed space-time model during the time period 2010-2030 for the lacustrine zone of Mexico City.

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Performance of a pavement foundation system based on the partial compensation of masses method

Cited by 10 publications

References 15 publications

Comportamiento esfuerzo-deformación del suelo: Evolución e Importancia

Comportamiento esfuerzo-deformación del suelo: Evolución e Importancia

Lime Treatment of Lake Texcoco Clays with Some Insights on the Application of Deep Mixing Columns

Space-Time Model to Predict The Evolution of the Regional Subsidence in The Lacustrine Zone of Mexico City

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