E3S Web Conf.
Volume 9, 20163rd European Conference on Unsaturated Soils – “E-UNSAT 2016”
|Number of page(s)||6|
|Section||Water Retention Properties|
|Published online||12 September 2016|
A theoretical retention model for unsaturated uniform and graded soils
1 Gaiatech, 22 rue Antoine Chollier, 38170, Seyssinet, France
2 L3S-R, Université Joseph Fourier, Grenoble, BP53, 38041, Grenoble, France
3 EGIS Géotechnique, 3, rue Docteur Schweitzer, 38180, Seyssins, France
4 LOMC, CNRS UMR 6294, Université du Havre, BP 540, 75058 Le Havre, France
5 GCD,Ecole Nationale des Travaux Publics de l’Etat, 3 rue Maurice Audin, 69518, Vaulx en Velin France
a Corresponding author: email@example.com
Modelling the relation between the degree of saturation and the suction (ie retention curve) is an important challenge for geotechnical engineering. It has a huge influence on the behavior of large soil constructions as levees, embankments, road earthworks. We present here a theoretical model of retention curve which considers physical relations of unsaturated soils. With this approach, there is no need to assume particular shapes of the retention curves, which are a consequence of the physical assumptions. The present study is focused on a theoretical model based on elastic spherical particle arrangement. As a first step a uniform model is presented with a single diameter of soil particle. A second step extends the use of the model to graded soils. The model uses only 5 physical parameters. It is compared with the experimental retention curve of two different samples of glass uniform particles and two different graded soils, a graded glass sample and the Livet-Gavet loam. It shows its ability to model the experimental curves and a better agreement than the former theory of Brooks and Corey (1966). This current publication is funded by the French National Project «Terredurable» (ANR 2011),.
© 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.
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