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Behavior of a new laterally top-loaded post-grouted micropile in highly porous lateritic soil
Comportamiento de un nuevo micropilote post-inyectado cargado lateralmente en suelo laterítico altamente poroso
DOI:
https://doi.org/10.15446/dyna.v90n225.104807Palabras clave:
post-grouted micropile; horizontal loading test; lateritic soil; collapsible soil (en)micropilote post-inyectado; prueba de carga horizontal; suelo laterítico; suelo colapsable (es)
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The use of micropiles has been increasing in recent years, mostly for horizontally loaded cases. Given the little information about this foundation type under lateral top-loading, especially in high-porosity and collapsible soils, a total of four transversal loading tests were carried out in a new post-grouted micropile configuration with length of 17 m and diameter of 0.3 m, two in natural soil moisture conditions and two in flooded conditions. Load-displacement curves and the horizontal reaction coefficient of the new micropile were obtained. Results were compared with other pile types laterally tested under the same conditions and in the same geological and geotechnical contexts. Generally, results were better than the other pile types, mainly under saturated condition. The new micropile proved to be a better and more efficient alternative for local lateritic soil treatment when compared with the soil-cement treatment.
El uso de micropilotes ha crecido en los últimos años, principalmente para casos solicitados horizontalmente. Dada la poca información sobre este tipo de fundación cargada lateralmente, especialmente en suelos colapsables y de alta porosidad, se realizaron un total de cuatro ensayos de carga lateral en una nueva configuración de micropilote post-inyectado de 17 m de longitud y 0.3 m de diámetro, dos en condiciones naturales de humedad y dos en condiciones inundadas. Se obtuvieron las curvas carga-desplazamiento y el coeficiente de reacción horizontal del nuevo micropilote. Los resultados se compararon con otros tipos de pilotes ensayados lateralmente en las mismas condiciones y en los mismos contextos geológico y geotécnico. En general, los resultados fueron mejores que otros tipos de pilotes, especialmente en condiciones saturadas. El nuevo micropilote demonstró ser una alternativa mejor y más eficiente para tratamiento de lo suelo laterítico local en comparación con el tratamiento de suelo-cemento.
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CrossRef Cited-by
1. Yuri Barbosa, André Luís Gamino, Paulo José Rocha Albuquerque, Gentil Miranda, David Carvalho, Marcos Massao Futai. (2025). Numerical Study of Soil–Cement Treatment Effects on Laterally Loaded CFA Piles in Collapsible Soils. Geotechnical and Geological Engineering, 43(8) https://doi.org/10.1007/s10706-025-03499-z.
2. Patricia Rodrigues Falcão, Magnos Baroni, Gustavo Corbellini Masutti, Rinaldo José Barbosa Pinheiro, Diego de Freitas Fagundes. (2023). Assessment of the Impact of Inundation on the Strength of a Lateritic and Collapsible Soil. Geotechnical and Geological Engineering, 41(8), p.4761. https://doi.org/10.1007/s10706-023-02545-y.
3. Yuri Barbosa, Paulo José Rocha Albuquerque, Gentil Miranda Junior, David de Carvalho, Marcos Massao Futai. (2025). Compacted Soil-Cement Treatment for Collapsible Soils Adjacent to Laterally Top-Loaded Flexible CFA Piles. Journal of Materials in Civil Engineering, 37(9) https://doi.org/10.1061/JMCEE7.MTENG-19706.
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