Experimental and numerical approaches of the hydro-mechanical behaviour of a quasi-saturated compacted clayey soil
1 Centrale-Supélec, Châtenay-Malabry, France
2 EGIS-Géotechnique, 3, rue Docteur Schweitzer, 38180, Seyssins, France
3 UNIV. GRENOBLE ALPES, 3SR, F-39800, Grenoble, France
4 GAIATECH, 22 rue Antoine Chollier, 38170, Seyssinet, France
a Corresponding author: firstname.lastname@example.org
The present research is funded by the French National Project « TerreDurable », which is dedicated to the study of soils in quasi-saturated conditions (close to saturation) for the analysis of stability and settlement of earth structures such as embankment, dams. A global presentation of the drying-wetting test shows the volume change, air entry and soil-water characteristics of the soil at slurry and oven-dried conditions. Unsaturated undrained triaxial test was carried out in order to investigate the variation of pore-water pressure from quasi-saturated domain to saturation. The experimental results of the triaxial test are then modeled using a two-dimensional explicit finite difference program (Flac 2D). A constitutive law developed in the TerreDurable project allows better understanding the behaviour of quasi-saturated soils using the water retention curve of quasi-saturated domain proposed by Boutonnier (2007, 2010). A simple effective stress model is used (Cam Clay) by taking into account both the suction and the compressibility of equivalent fluid (water + air). The results from numerical calculation and experimental measurements are compared.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.