Hydromechanical behavior of a quasi-saturated compacted soils on drying-wetting paths-experimental and numerical approaches

Soanarivo Rinah Andriantrehina (1) , Dino Mahmutovic (2, 3) , S. Taibi (4) , Luc Boutonnier (3) , J.-M. Fleureau (5)

1 LOMC - Laboratoire Ondes et Milieux Complexes
2 3SR - Laboratoire sols, solides, structures - risques [Grenoble]
3 EGIS SE - EGIS SE—Geotechnique
4 LMPG - Laboratoire de Mécanique, Physique et Géosciences
5 MSSMat - Laboratoire de mécanique des sols, structures et matériaux

This paper presents an experimental and numerical investigation funded by the French National Project "Terredurable", which is devoted to the study of soils in quasi-saturated state. The experimental study is focused on the behavior of compacted soils on drying-wetting paths and the macroscopic effect of the drying path on shrinkage and cracking. Furthermore, a protocol for image analysis of crack in drying tests was developed. Two approaches are used for the measurement of surface strains and identification of the ultimate stress before the formation of the first crack, using VIC-2D software, and for the monitoring of crack evolution, using ImageJ software. The aim of the numerical approach is to reproduce the drying experiments with a finite difference code (FLAC 3D), in order to understand the stress conditions that can explain crack initiation, without modeling the crack formation itself.

Domaines: Sciences de l'ingénieur [physics]

Soanarivo Rinah Andriantrehina, Dino Mahmutovic, S. Taibi, Luc Boutonnier, J.-M. Fleureau. Hydromechanical behavior of a quasi-saturated compacted soils on drying-wetting paths-experimental and numerical approaches. 3rd European Conference on Unsaturated Soils, E-UNSAT 2016, Sep 2016, Paris, France. ⟨10.1051/e3sconf/20160914013⟩. ⟨hal-02460159⟩