Sensibility of Sandy Soils Shear Strength Parameters on a Size of Spread Foundation

The paper deals with sensibility of sandy soils shear strength parameters on the size of spread foundation. Minimal, intermediate and maximal values of shear strength parameters of 5 classes of sandy soil (SW, SP, S-F, SM and SC) introduced in the old Slovak Technical Standard STN 731001 had been used to design model spread foundation, similar with this one, posted by Orr (2005). The foundation has square shape, thickness 0.8m, founded in the depth D = 1.5m. The foundation is loaded by centrically acting vertical permanent load G = 900 kN and variable load Q = 600 kN. Underground water level is at foundation base. The spread foundation was designed by design approaches mentioned in Eurocode 7, Part 1 (DA1-C1; DA1-C2; DA2 and DA3) and also by the old and new Slovak Technical Standard STN 73 1001.