Abstract

FLORES BERENGUER, Isaida; GONZALEZ HARAMBOURE, Yoermes  and  GARCIA TRISTA, Jenny. Slope stability in earth dams considering the suction angle of unsaturated soil. Ing. Desarro. [online]. 2022, vol.40, n.1, pp.71-91.  Epub Sep 02, 2022. ISSN 0122-3461.  https://doi.org/10.14482/inde.40.01.620.123.

The present investigation consists of analyzing the effect of unsaturated soil by introducing the characteristic curve and the suction angle in the analysis of slope stability in homogeneous earth dams. To achieve this, an earthen dam with a curtain height of 22 meters is considered, taking into account the following states: end of construction and operation, considering two CH-type soils in the curtain and three SC-type soils at the base. For the present study, the suction angle calculated from the angle of internal friction and the degree of saturation of the soil is used, comparing this result with that corresponding to the experimental characteristic curve of the same soils. The GeoStudio 2018 program, and the Finite Element Method combining the seep/w and slope/w components are used. The fundamental result reveals that it is possible to consider the unsaturated state of the soil directly through the suction angle, based on new relationships with respect to the internal friction angle of the soil and depending on the water level of the analyzed dam.

Keywords : end of construction; opera tion; suction angle; slope stability; unsa-turated soils.

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