Effect of sand cushion reinforced with geogrid on heave of footing rested on expansive soilYoussef Gomaa Youssef, Gihan Elsayed Abdelrahman and Abdelrahman Emad AbdeltawabE3S Web Conf., 368 (2023) 02028DOI: https://doi.org/10.1051/e3sconf/202336802028