Video Experimental Relacionado
Updated: Sep 10, 2025

09:13
Experimental Multiscale Methodology for Predicting Material Fouling Resistance
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Un estudio sobre los mecanismos de fricción negativa en las pilas dentro de los vertederos de desechos drenados
Xiangyang Hou1, Wei Sun1, Yongle Chen1
1China Railway First Group Co., Ltd., Xi'an 716006, China.
Materials (Basel, Switzerland)
|August 28, 2025
Resumen
Un nuevo modelo mecánico predice con precisión la fricción negativa en las pilas utilizando rellenos de desechos dragados. Las pilas de menor diámetro experimentan una mayor fricción negativa, crucial para el diseño de cimientos estables de carreteras costeras.
Área de la Ciencia:
- Ingeniería geotécnica
- Ingeniería civil
- Ingeniería ambiental
Sus antecedentes:
- Los cimientos de las carreteras costeras a menudo usan vertederos de escombros dragados y bajos en carbono.
- Estos rellenos tienen un alto contenido de agua y una baja consolidación, lo que provoca un asentamiento diferencial.
- Los modelos mecánicos existentes para la fricción negativa en estos rellenos están poco desarrollados.
Objetivo del estudio:
- Establecer un modelo mecánico para la fricción negativa en pilas individuales dentro de cimientos compuestos de relleno de desechos dragados.
- Analizar el desarrollo de la fricción negativa y la migración del punto neutro utilizando métodos experimentales y numéricos.
- Proporcionar ideas para el diseño de cimientos más seguros en áreas de materiales recuperados.
Principales métodos:
- Método de transferencia de carga para establecer un modelo mecánico para la fricción negativa.
- Pruebas de modelos centrífugos para observar la interacción entre la pila y el suelo.
- Simulaciones numéricas para analizar la fricción negativa y el comportamiento del punto neutro.
- Comparación de las predicciones teóricas con los datos experimentales.
Principales resultados:
- El modelo desarrollado predice eficazmente la posición del punto neutro y la fricción negativa (error medio relativo < 6,5%).
- La carga hacia abajo debido a la fricción negativa aumenta de manera no lineal, vinculada al proceso de consolidación.
- La migración del punto neutral se correlaciona con la consolidación del relleno dragado.
- El diámetro de la pila tiene un impacto significativo en la distribución de fricción negativa; las pilas más pequeñas experimentan valores más altos.
Conclusiones:
- El modelo teórico proporciona predicciones confiables para la fricción negativa en las fundaciones de relleno dragado.
- La fricción negativa se estabiliza después de aproximadamente 50 meses de asentamiento.
- Los hallazgos ofrecen referencias cruciales para el diseño de cimientos robustos en proyectos costeros y de tierra recuperada.
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