Control de compactación con penetrómetro ligero en tranques de relaves, considerando su variabilidad material y estructural

Villavicencio, Gabriel; Breul, Pierre; Espinace, Raúl; Valenzuela, Pamela

doi:10.4067/s0718-915x2012000100011

Cited by 1 publication

(2 citation statements)

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“…The Panda device is a manual, light, dynamic penetrometer with variable energy and a small cone section (2.0 or 4.0 cm2) (Chaigneau, 2001;Villavicencio et al, 2012), which provides the cone resistance qd of the soil as a function of depth, and is capable of performing a large number of tests in situ thanks to its small size and its quick implementation. This device can operate to a depth of 6m and for materials having particles smaller than 50mm.…”

Section: Methodology Estimation Of Relative Density (Dr%) From Dynamimentioning

confidence: 99%

“…In order to provide a robust strategy for managing the potential liquefaction risk, use of a probabilistic approach is an attractive option. However, applying such an approach in practice is limited by the difficulty of obtaining and managing the data (random variables and stochastic fields) to be introduced into the reliability calculations and is conditioned by the relevance of the probability models chosen to represent the variability of sand tailings dam properties (Villavicencio, Breul, Bacconnet, Boissier & Espinace, 2011;Villavicencio, Breul, Espinace & Valenzuela, 2012). In this article, we propose a method to estimate on site the sand tailings relative density (DR%) and its variability, using dynamic penetration tests.…”

Section: Introductionmentioning

confidence: 99%

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Liquefaction potential of sand tailings dams evaluated using a probabilistic interpretation of estimated in-situ relative density

Breul

Bacconnet

et al. 2016

Revista de la Construcción

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In Chile, sand tailings dams represent the most common deposits of mining residues. These structures present a potential risk in terms of mechanical instability due to their potential susceptibility to seismic liquefaction. In order to manage these risks, it is necessary to take a probabilistic approach, thus accounting for inherent variability of material properties. However, in practice, implementing such an approach is impeded by the difficulty of acquiring and managing the data to be used in the reliability calculations and is conditioned by the relevance of the probabilistic models chosen to represent this variability. This paper proposes a method for onsite determination of the tailings relative density (DR%), and its variability, using dynamic penetration tests. This method was applied to typical Chilean sand tailings dams, and proposes a single model for all such tailings dams by associating a probability model to the variation of DR%. Finally, the validity of this approach is demonstrated by performing a reliability calculation of liquefaction potential (which is the main cause for the failure of this type of structure in this country) for a particular sands tailing dam.Keywords: cone penetrometer test; relative density; liquefaction; sand tailings dams. ResumenEn Chile los tranques de arenas de relaves representan los depósitos de residuos mineros más comunes. Estas estructuras presentan un potencial riesgo en términos de inestabilidad mecánica debido al fenómeno de la licuefacción sísmicamente inducida. Para conocer este riesgo, es necesario considerar una aproximación probabilística. Sin embargo, en la práctica, la implementación de estas aproximaciones es muy limitada, debido la dificultad obtener los datos necesarios para los cálculos de fiabilidad, y a la selección de los modelos probabilísticos necesarios para representar su variabilidad. Este artículo propone un método para estimar in-situ la densidad relativa (DR%) en arena de relaves y su variabilidad, a partir de ensayos de resistencia a la penetración dinámica. El método se aplica en tranques de arena de relaves chilenos, proponiendo un único modelo para la función de probabilidad del parámetro DR%. Finalmente, el interés de esta aproximación se demuestra mediante un cálculo de fiabilidad del potencial riesgo de licuefacción, correspondiente a la principal causa de falla en países sísmicamente activos como Chile.Palabras claves: ensayo de penetración, densidad relativa, licuefacción, tranques de arenas de relaves.9

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Section: Methodology Estimation Of Relative Density (Dr%) From Dynamimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Liquefaction potential of sand tailings dams evaluated using a probabilistic interpretation of estimated in-situ relative density

Breul

Bacconnet

et al. 2016

Revista de la Construcción

View full text Add to dashboard Cite

show abstract

Control de compactación con penetrómetro ligero en tranques de relaves, considerando su variabilidad material y estructural

Cited by 1 publication

References 4 publications

Liquefaction potential of sand tailings dams evaluated using a probabilistic interpretation of estimated in-situ relative density

Liquefaction potential of sand tailings dams evaluated using a probabilistic interpretation of estimated in-situ relative density

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