Application of upper bound method to stability analysis of reinforcement

The upper bound method of limit analysis can be used for the stability analysis of reinforced earth; the internal works on the slip plane is the crux of the stability analysis. Firstly, the methods of calculating internal works on the slip plane based on the classical plasticity theory of upper bound method are summed up. Then the upper bound method based on the generalized plasticity theory is used to Yang junjie's method about calculating the internal works on the slip plane. Comparing the upper bound method both based on the classical and generalized plasticity theory and the centrifuge test results, it is shown that the upper bound method based on the classical plasticity theory is simple and clear; the computed result is reliable, although the upper-bound method based on the generalized plasticity theory is more perfect; it is difficult to use when that the slip surface to be an curve plane.