E3S Web Conf.
Volume 195, 20204th European Conference on Unsaturated Soils (E-UNSAT 2020)
|Number of page(s)||6|
|Section||Teoretical and Numerical Models|
|Published online||16 October 2020|
Theoretical modelling of retention curve for Livet-Gavet loam
1 GAIATECH, 22 rue Antoine Chollier, 38170, Seyssinet, France
2 EGIS, 3, rue Docteur Schweitzer, 38180, Seyssins, France
3 LOMC, CNRS UMR 6294, Université Le Havre Normandie, BP540, 75058, Le Havre, France
4 ENTPE, 3 rue Maurice Audin – 69518 Vaulx-en-Velin, France
* Corresponding author: monnet.jacques @gaiatech.fr
Different approaches have been used for modeling retention curves. The experimental correlation was first proposed [1-3]. The physical modelling of unsaturated soils is used for this study. The shape of the retention curve is a consequence of physical assumptions. The paper presents a theoretical model based on elastic spherical particle arrangement. Firstly, a uniform model is presented with a single diameter of soil particle. The second step extends the use of the model to graded soils. The model uses only physical parameters easy to measure. The model is compared with the experimental retention curve of two different samples, the Livet-Gavet loam (1.61m-3mm) as paste and the Gavet sandy loam compacted with 85 falls per layer of Proctor weight. It shows its ability to model the experimental curves. It is of great interest for engineers as it uses only physical parameters. It gives a direct determination of the retention curve along the wetting path and along the drying path. It shows also the importance of adsorbed water to describe the retention curve.
© The Authors, published by EDP Sciences 2020
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