Experimental Investigation on Load Carrying Capacity of Micropiles in Soft Clay

Borthakur, Nirmali; Dey, Ashim Kanti

doi:10.1007/s13369-017-2894-3

Cited by 23 publications

(5 citation statements)

References 9 publications

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“…Para determinar la capacidad de carga última de un grupo de micropilotes en suelo arcilloso plástico en India, se estableció una ecuación no lineal a partir de datos experimentales [38], estudiando los comportamientos de losas micropiloteadas con y sin interacción directa en el suelo, los micropilotes se construyeron con diámetros de 25 y 50 mm proporción en longitud de máximo 40 veces su diámetro, configurados en cinco patrones diferentes de 1, 2, 4, 9 y 16 micropilotes. La carga soportada por la losa en contacto con el suelo es de aproximadamente 50 % más que la transportada por una losa sin contacto, lo anterior se debe al efecto de confinamiento producido por el terreno; se determinó a partir de observaciones experimentales que la capacidad de carga de un grupo de micropilotes crece de una manera no lineal con el aumento del diámetro, la longitud, el número y el espaciado.…”

Section: Capacidad De Cargaunclassified

Inclusión de micropilotes como elementos recuperadores de carga en cimentaciones: revisión del estado del conocimiento

Guerrero

Rincón

2022

Ing.

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Contexto: Los micropilotes son utilizados como elementos de refuerzo del suelo o de recalce, dicha función es comprobada y analizada por diferentes autores. En Colombia el uso de esta técnica está limitado a conceptos propios del geotecnista que involucran conocimientos empíricos y experiencias exitosas. En consecuencia, es necesaria la compilación de variables clave y metodologías analíticas y numéricas para la mejor comprensión de esta técnica. Método: En este documento se presenta un estado del arte sustentado en artículos e investigaciones que tienen como objeto el análisis y la evaluación del comportamiento de los micropilotes como elementos recuperadores de capacidad de carga en grupos de pilotes que presentan defectos. Resultados: Los hallazgos identificados en los documentos consultados logran ser sintetizados como un soporte teórico que se convierte en un punto de partida para futuras investigaciones en este campo de la ingeniería geotécnica. Conclusiones: Se logra evidenciar que los micropilotes tienen una influencia positiva en la recuperación de carga de fundaciones existentes, demostrando la importancia de efectuar ensayos y análisis de campo directamente en Colombia, considerando los estratos de suelos específicos que se encuentran en el país.

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Section: Capacidad De Cargaunclassified

Inclusión de micropilotes como elementos recuperadores de carga en cimentaciones: revisión del estado del conocimiento

Guerrero

Rincón

2022

Ing.

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“…In highly flexible clayey soil, Borthakur & Dey [26] looked at the group reactions of cast in-situ jetted micropiles. on a test pit of 2.0 m × 4.0 m × 3.0 m, the micro piles were built on clayey soil with a very soft consistency.…”

Section: Introductionmentioning

confidence: 99%

Studying the Behavior of Expansive Soil Reinforced by Micropiles

Al-Gharbawi,

Najemalden,

Fattah

2024

Civ Eng J

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Expansive soil is a form of soil that can expand and contract, changing its volume. Montmorillonite, a mineral with the ability to dissolve in water, makes up the majority of these kinds of soils, and by increasing the volume of the soil, it causes the soil to heave. Expansive soils could be a substantial concern for engineered buildings due to their capacity to adjust to seasonal variations by contracting or expanding moisture content. Many researchers focused on soils that were swollen and looked at how they behaved as well as how they could be improved. In this study, the work depends on inserting micro-piles with different depths and configuration widths to investigate which depth and configuration can be obtained to improve the bearing capacity of foundations on expansive soil. The main purpose of this study is to reinforce the expansive soil with micro-piles with different depths (1B, 2B, and 3B) and different configuration widths (under footing only, 1B and 2B). It was concluded that the soil reinforced with micro-piles improved the load-bearing capacity of the expensive soil and decreased the swell pressure. The increasing depth of the micropiles 2B to 3B (B is the width/diameter of the foundation) can increase the bearing capacity by just 6%; therefore, increasing the depth beyond 2B is not beneficial. Also, the increase in width of the configuration of the micro piles from 1B to 2B increases the bearing capacity by just 4%; therefore, the increase in width greater than 1B is not valid. Doi: 10.28991/CEJ-2024-010-01-017 Full Text: PDF

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“…Borthakur and Dey [29] conducted a systematic investigation into micropile groups in soft soils. Their study involved an analysis of the nonlinear relationship between the load-bearing capacity of micropile groups and various parameters, including pile diameter, length, quantity, and spacing.…”

Section: Introductionmentioning

confidence: 99%

Horizontal and Uplift Bearing Characteristics of a Cast-In-Place Micropile Group Foundation in a Plateau Mountainous Area

Li,

Ren

2023

Sustainability

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Micropile groups have been progressively more frequently adopted in the construction of transmission tower bases due to their compact size and flexible construction advantages. However, the load-bearing characteristics and deformation mechanisms of micropile groups are complex, and the study of their coupling effects under combined loads remains unclear. Consequently, this paper presents a field static load test of micropile groups in a highland mountainous area. The analysis encompasses the axial force distribution and load-sharing ratio of micropiles. With a focus on micropile groups subjected to both uplift and horizontal combined loads, the coupled effects under different load combination ratios are examined using numerical simulation methods. The key findings are as follows: During the uplift loading process, the load distribution among individual piles is relatively uniform, with lower side friction resistance gradually coming into play to counterbalance the top load. The load–uplift displacement curve exhibits a steep characteristic, making it susceptible to sudden failure in practical engineering applications. Under the simultaneous action of uplift (V) and horizontal (H) loads, the unbalanced lateral frictional resistance on both sides of the pile segment induces additional bending moments, which is an important part affecting the load-coupling mechanisms. The uplift resistance capacity of micropile groups decreases with an increase in horizontal load, while the horizontal load-carrying capacity initially decreases and then increases with an increase in uplift load. The space enclosed by the yield envelope under combined load, and the vertical line of the ultimate load, is divided into a ‘failure zone’ and a ‘safety zone.’ In the design of the pile foundation, the uplift bearing capacity reduced by the ‘failure zone’ should be taken into account.

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Experimental Investigation on Load Carrying Capacity of Micropiles in Soft Clay

Cited by 23 publications

References 9 publications

Inclusión de micropilotes como elementos recuperadores de carga en cimentaciones: revisión del estado del conocimiento

Inclusión de micropilotes como elementos recuperadores de carga en cimentaciones: revisión del estado del conocimiento

Studying the Behavior of Expansive Soil Reinforced by Micropiles

Horizontal and Uplift Bearing Characteristics of a Cast-In-Place Micropile Group Foundation in a Plateau Mountainous Area

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