Simplified design method for reinforced slopes considering progressive failure

A limit equilibrium-based design method for reinforced slopes considering progressive failure is developed. A local safety factor is first defined at the base of each slice so as to describe local failure along a slip surface. An incremental approach is constructed to solve the equations and an empirical interslice force function is introduced to enhance the efficiency and robustness of the solution procedure. Then, a new design scheme for reinforced slopes is proposed. In this scheme, an optimization technique is contrived to determine tensile resistances of reinforcement elements that will be required to provide an adequate factor of safety of reinforced zones. The proposed procedure can be used to determine suitable layout of reinforcements and required tensile strength of reinforcing material. Finally, results obtained from an example are presented and discussed to provide a guideline for practical design of reinforced slopes using the proposed method.