Artículos de revistas
Collapse behavior of soil in a Brazilian region affected by a rising water table
Fecha
2011Registro en:
CANADIAN GEOTECHNICAL JOURNAL, v.48, n.2, p.226-233, 2011
0008-3674
10.1139/T10-065
Autor
VILAR, Orencio Monje
RODRIGUES, Roger Augusto
Institución
Resumen
Collapsible soils are usually nonsaturated, low density, and metastable-structured soils that are known to exhibit a volume reduction following an episode of moisture increase or suction reduction. This paper describes the collapsible behavior of clayey sand based on controlled soil suction tests carried out on undisturbed samples from the city of Pereira Barreto, in the State of Sao Paulo, Brazil. Foundation settlements due to soil collapse are common in this region and occurred during the filling of the reservoir of the Tres Irmaos Dam, which induced the elevation of the groundwater table in different parts of Pereira Barreto. This paper shows that collapse strains depend on the stress and soil suction acting in the sample and that saturation is not necessary for a collapse to occur. The influence of soil suction, gradual wetting, and the wetting and drying cycle on the collapsible behavior of the soil is also shown and discussed.