Abstract: Based on the Barton-Bandis failure criterion, this paper explores two common methods on converting the nonlinear strength parameters of Barton-Bandis failure criterion into the linear shear strength parameters c, φ of Mohr-Coulomb failure criterion, and discusses their advantages and disadvantages by case study. Following this idea, the anti-sliding stability factor was deduced for such a plane slide rock slope, which was reinforced by prestressed anchor cable and controlled by single rock joint. Next, the analysis of parameters on anchoring was conducted. Parametric analysis shows that, studying the anti-sliding stability factor of plane slide rock slope by Barton-Bandis failure criterion is intuitive and effective, in comparison with obtaining the Mohr-Coulomb shear strength parameters with the equivalent linear fitting or tangent equivalent method. Meanwhile, the slope safety factor increases significantly with the increase of three factors, namely, the basic friction angle, the surface roughness coefficient and the effective compressive strength. Also, the influence of the basic friction angle and the roughness coefficient on the slope safety factor is more pronounced. It is also shown that the larger the tension force of anchor cable is, the better the slope sliding stability will be, whilst, the value of the set angle of anchor cable exerts a negative role on the slope sliding stability; therefore, the improper dip angle of anchor cables will significantly reduces the anchorage effect.

Key words: rock slope, prestressed anchor cable, stability analysis, Barton-Bandis failure criterion, plane slide