FORMULA OF THE DESIGN RESISTANCE OF SOIL FOR PLATE FOUNDATIONS

Abstract

This article presents a study of the design soil resistance for slab foundations, on the basis of which it is concluded that its value is overestimated when calculating by the normative method. A new formula for the design soil resistance for slab foundations is derived, which is based on the limitation of zones of plastic deformation, depending on the depth of the foundation. The new formula is derived according to the methodology similar to the normative formula with the difference in replacing the band load solution with the semi-infinite load solution. The advantage of the new formula is that the obtained value of the design resistance of the foundation cannot exceed the ultimate pressure calculated according to the generalized Prandtl formula. A possible variant of delimiting the areas of application of the normative and new formulas for the design soil resistance, as well as the problem of determining the depth of penetration of plastic zones into the soil base with an increase in the depth of the foundation, is described.