Field monitoring of the water pressure and displacement of a partially saturated expansive marl under an unloading stress path due to deep excavationMissom Ouédraogo, Luc Boutonnier, Fabrice Emeriault and Dino MahmutovicE3S Web of Conf., 382 (2023) 24006DOI: https://doi.org/10.1051/e3sconf/202338224006