Stability analysis of grillage supporting structure with prestressed anchors

Based on the limit equilibrium theory and the failure model of grillage supporting structure with prestressed anchor, using Bishop method for slope stability, and considering vertical inter-slice shearing force effects on the shear strength of soil side-slope, the search model of the most dangerous slip surface is set up; ann the solving formula of stability factor is derived; calculation of integral stability of slip surface has been carried out by using the genetic algorithms. The method can avoid getting in local minimum in optimal design; and it has more credible and accurate advantage.