DOI:
https://doi.org/10.14483/22487638.20418Publicado:
01-09-2024Número:
Vol. 28 Núm. 81 (2024): Julio - SeptiembreSección:
InvestigaciónEfecto del tamaño de bloques en la resistencia al corte de suelos con bloques (bimsoils) de bajas proporciones volumétricas
Blocks size effect on the shear strength of bimsoils with low volumetric blocks proportion
Palabras clave:
bimsoils, blocks size, FEM, volumetric blocks proportion (en).Palabras clave:
bimsoils, tamaño de bloques, ensayo triaxial drenado, elementos finitos, proporción volumétrica de bloques (es).Descargas
Resumen (es)
El término bimsoils se utiliza para definir la inclusión de bloques rígidos embebidos en una matriz de suelo débil,
donde la relación de rígidez entre ambos materiales es mayor a dos. La investigación en bimsoils se concentra
en la determinación de los parámetros de resistencia en función de la proporción volumétrica de bloques (VBP).
Sin embargo, la resistencia de bimsoils depende de otras variables, entre ellas el tamaño de los bloques. Aunque
algunos autores indican que este no influencia la resistencia, otros concluyen que la resistencia es mayor cuando la distribución de tamaños es bien gradada y el tamaño máximo del bloque es mayor. Este estudio presenta un análisis numérico de la influencia del tamaño del bloque y la V BP en los parámetros de resistencia de bimsoils, a partir de ensayos triaxiales drenados modelados en FEM. El tamaño de bloque es constante en todo el espécimen y corresponde a una fracción del diámetro de la muestra (D) que varía de 0.1 a 0.2. Se observa una mayor resistencia al corte en los bimsoils con valores elevados de VBP y tamaño de bloques entre 0.12D y 0.15D. Esto se refleja en los parámetros de resistencia. La influencia del tamaño se observa para distintas VBP y cuando los bloques tienen una distribución espacial uniforme y columnar. El aumento de la V BP genera el incremento en la anisotropía de la magnitud de los esfuerzos principales en la muestra y los tamaños de bloques 0.12D y 0.15D generan una mayor heterogeneidad de los esfuerzos de corte reflejado en la magnitud y propagación de los esfuerzos en la muestra.
Resumen (en)
The term bimsoils is used to define the inclusion of rigid blocks embedded in a weak soil matrix, where the stiffness
ratio between both materials is greater than two. Research on bimsoils primarily focuses on determining shear
strength parameters based on the volumetric proportion of blocks (V BP). However, the shear strength of bimsoils is
also influenced by other variables, including the size of the blocks. Although some authors indicate that size has no
influence on shear strength, others conclude that strength is greater when the size distribution is well-graded, and
the maximum block size is greater. This study analyses the influence of block size and V BP on bimsoils strength
parameters, from drained triaxial tests modeled in ABAQUS. The block size is unique in the entire specimen and corresponds to a fraction of the diameter of the sample (D) that varies from 0.1 to 0.2. Shear strength is higher for
bimsoils with higher V BP and block size between 0.12D and 0.15D and it is reflected in the strength parameters.
The influence of size occurs for different V BP and when the blocks have a uniform and columnar location. The
increment in the V BP generates the increase in the anisotropy of the magnitude of the principal stresses in the
sample and the block sizes 0.12D and 0.15D generate a greater heterogeneity of the shear stresses reflected in the
magnitude and propagation of the stresses in the sample.
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Derechos de autor 2024 Denisse Campos Muñoz, Alfonso Mariano Ramos Cañón, Luis Felipe Prada Sarmiento
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