Communications - Scientific Letters of the University of Zilina 2011, 13(4):102-108 | DOI: 10.26552/com.C.2011.4.102-108

The Cohesion or Dilation Effect on the Shear Strength of Granitic Residual Soil

Luis J. Andrade Pais1, L. M. Ferreira Gomes1, Isabel Falorca1, Paulo M. Carvalho1, Victor P. Cavaleiro1
1 Department of Civil Engineering and Architecture, The Beira Interior University, Calcada Fonte do Lameiro, Covilha, Portugal

The paper reports laboratory investigations carried out in granitic residual soil from Covilha, to evaluate the stress-strain-dilatancy behaviour to provide a new model. Some soil tests are intended only to classify soil into broad groups. Other tests are done to examine the mechanical behaviour of soils and particularly to investigate their strength and deformation during loading. Drained and undrained triaxial tests were performed to study soil fabric effects on the mechanical behaviour of a granitic residual soil. It was revealed that the dilatancy of the saturated soil contributes to shear stress and strength at lower confining pressures. The cohesion is apparent for small stress and we need to introduce the evaluation of volumetric strain to understand the effect of the dilatancy in the peak strength.

Keywords: dilatancy, laboratory tests, granitic residual soil, shear strength

Published: December 31, 2011  Show citation

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Andrade Pais, L.J., Ferreira Gomes, L.M., Falorca, I., Carvalho, P.M., & Cavaleiro, V.P. (2011). The Cohesion or Dilation Effect on the Shear Strength of Granitic Residual Soil. Communications - Scientific Letters of the University of Zilina, 13(4), 102-108. doi: 10.26552/com.C.2011.4.102-108
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