Analysis of Bearing Capacity for Logarithmic Spiral Slip Surfaces

In this paper, a conventional and practically useful analytical method of bearing capacity is presented, assuming that slip lines in the foundation are composed of a single logarithmic spiral curve. The applicability of the method is then examined by comparing its solutions with those from other theoretical and empirical formulae as well as experimental results. Emphasis is also placed on some advantages of the method, showing that bearing capacity factors can be expressed to some extent in closed forms, and that the method is applicable for bearing capacity against eccentric and inclined loads of both shallow and deep foundations