Abstract：The Yuanjiang—Mohei expressway deep cut rock slope stability analysis is carried out by strength reduction finite element method. The shear strength reduction FEM is adopted to analyse the interaction between the soil and stabilizing structural of frame beam with prestressed anchor rope. The frame beams are simulated by beam No.3 element in ANSYS software；and the prestressed anchor ropes are simulated by anchor-hold force. The construction processes are simulated by element“kill and alive”technique of ANSYS. With the shear strength reduction，the rock slope nonlinear FEM model reaches instability，and the numerical non-convergence occurs simultaneously. The safety factor is then obtained by shear strength reduction algorithm. At the same time the critical failure surface and the frame beam pressure distribution and internal forces (bending moments and shear force distribution) of stabilizing structure are obtained automatically. For this engineering example，the bending moments and shear force of stabilizing structure are obtained through in-situ measurement. At the same time，the bending moments and shear force of stabilizing structure are computed by traditional method using Winkler elastic model. This paper presents an analysis and comparison of the in-situ measurement and numerical simulation. Through a series of case studies，the calculation results of FEM are close to the result of in-situ measurement. Some useful conclusions are obtained and suggestions are proposed. Such method offers a reference for evaluation of similar engineering in the future.
