Effect of Different Values of Soils Shear Strength Parameters on the Size of Spread Foundation

Abstract Shear strength parameters have significant effect on size of spread foundation. When designing spread foundation, the parameters necessary to calculate the bearing capacity of foundation soil are angle of internal friction and cohesion. In this paper the effect of guiding standardized minimal, intermediate and maximal values of shear strength parameters introduced in the old Slovak Technical Standard STN 731001 as so as shear strength parameters vales obtained from geotechnical investigation report on the size of spread foundation is compared. The analysis of design of spread foundation, placed on homogeneous and inhomogeneous subsoil is also made.