Improved Technique for Computing Critical Slip Fields of Rock Slope

The improvement and extension for critical slip fields of rock slope was performed,in view of the discontinuity of rock.By fully considering the influence of structural surface to the stability of the slope,a new method was proposed to deal with structural planes,and tensile cracks were readily introduced based on the tensile strength of rock.The improved techniques for constructing critical slip fields of rock slope were incorporated into a computer program.By numerically simulation,the most dangerous sliding surfaces were traced according to the principle of maximum thrusts with satisfaction of both force and moment equilibria,resulting in critical slip surfaces quickly and exactly as well as the corresponding factors of safety.This method was applied to the stability analysis of five example slopes and a case slope,and the results showed its accuracy and high effectiveness in rock slope stability analysis in comparison with other methods.