%0 Journal Article %T Presenting new models to determine subgrade reaction modulus (Ks) for optimizing foundation calculations in coarse grained soils %A Salari, Pouya %A Hafezi Moghaddas, Naser %A Lashkaripour, Gholam Reza %A Ghafoori, Mohammad %J Revista de la Construccion %@ 0718-915X %D 2020