Ultimate Bearing Capacity Based on Unified Strength Theory
In the ultimate bearing capacity formulas, the factor Nγ has not been given a definite expression, so the calculation diagrams are not serious and the hypothesis can’t match the reality. Most of the ultimate bearing capacity factors are received from the results of Prandtl theory, but the theoretic models they used are not the same. And most of the ultimate bearing capacity theories are based on Mohr-Coulomb theory, the effects of intermediate principle stress are ignored. To solve these problems, according to ultimate balance theory and unified strength theory, the analytical formulas of ultimate bearing capacity and Nγ are received when foundation is completely smooth. The results show that the ultimate bearing capacity will increase when considering the effects of intermediate principle stress and the formulas from practical experiences can make the ultimate bearing capacity unsteady.