Abstract:Based on the failure mode of the slip surface and the theory of limit equilibrium,using the circular slice method,and considering the supporting structure and anchor effects on stability of soil slope,the search model for the most dangerous slip surface is set up;and the function relationship between stability factors and the center of circular slip surface is derived. By setting the center zone of slip surface dynamically with computer,and searching the center of slip surface by the method of lattice in the center region,a method of the stability calculation for the grillage supporting structure with prestressed anchor is given. Finally,the calculation software is developed and applied to a practical case.