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Geology, 2.1 CIVIL ENGINEERING, Civil engineering, Environmental and geological engineering, Geotechnics
According to the variability of the local geology of the Aburrá Valley, two geological strata with similar grain size distribution were analyzed. The geologies are composed of mudflows and residual soils from the San Diego stock in the Poblado neighborhood. These soils show a similar mechanical behavior in relation to the number of blows of the standard penetration test SPT. The analysis was carried out by reliability methods for the determination of the active earth pressure for the geotechnical design of a cantilever walls. The analysis consists in the variation of the height of the retaining wall between 1 and 10 meters and the inclinations of the filling between 0 and 25 degrees, using design parameters obtained from laboratory tests (effective cohesion and friction angle) and the results obtained from correlations of the SPT test (equivalent friction angle). These input variables were represented by their probability distribution functions, based on the results of the field tests and the direct shear tests. The results indicate that, although these geologies show similar mechanical behavior, there is a geological influence from the probabilistic point of view, since these soils have different probability functions for the design parameters, which directly affect the probability function of the active earth pressure and therefore the probability of failure for the cantilever retaining walls analyzed.
Castro, Juan David; Viviescas, Juan Camilo & Osorio, Juan Pablo. (2017). Análisis por confiabilidad del empuje activo para el diseño de muros de contención en voladizo en los flujos de lodos y suelos residuales del área metropolitana del Valle de Aburrá. Ingeniería y Tecnología Vol. 13, No.26, pp. 21-28.