What is the advantage of using Spencers method?
The Spencer method is suited to both circular and non-circular problems and is theoretically more accurate than Bishop’s method. However, in practice, the Factors of Safety determined by Spencer’s method and Bishop’s method for circular failure surfaces are almost identical. In some situations it can be difficult to get a result when using Spencer’s method since the force and moment equilibrium calculations may not always converge. For these instances, GALENA allows for inclusion of an automatically generated tension crack of a user-defined depth in each and every analysis.
