Abstract

VALENCIA-GONZALEZ, YAMILE; CARVALHO, JOSE CAMAPUM DE  and  GITIRANA, GILSON. Simple Methodology For Determining The Failure Envelope Of The Shear Strength Of Unsaturated Soils. Rev.EIA.Esc.Ing.Antioq [online]. 2019, vol.16, n.32, pp.43-53. ISSN 1794-1237.  https://doi.org/10.24050/reia.v16i32.1218.

This paper proposes several simple laboratory methodologies to determine the failure envelope in unsaturated soils. The first methodology consists on tests of indirect traction on samples used for the definition of the soil characteristic curve, together with the saturated shear strength test. This methodology is validated numerically from the distribution of stress state in the specimens, using a finite element model in 3D. The other methodologies for determining the rupture envelope consist of the combination of direct shear tests on saturated samples and the simple compression test; As well as the combination of the tests of simple compression and indirect traction, also defining the characteristic curve. Such methodologies have the advantage of simplicity and economy, making possible the determination of resistance parameters in unsaturated conditions, which may be a reasonable alternative when the strength parameters can not be obtained directly from the controlled suction tests.

Keywords : Unsaturated soils; indirect traction; Shear strength test; Envelope of the shear strength; Suction.

        · abstract in Portuguese | Spanish     · text in Portuguese     · Portuguese ( pdf )