边坡强度参数对于稳定性影响的极限平衡法分析

为了研究岩土体抗剪强度参数对边坡稳定性的影响，通过理论推导和Bishop极限平衡法计算，分别改变岩土体的粘结力c和内摩擦角，探讨边坡安全系数和滑动面的变化.结果表明：粘结力或内摩擦角改变时，边坡的安全系数将发生变化，而滑动面的变化受函数η-c的影响，η-c与粘结力和内摩擦角有关.当η-c为定值时，滑动面不随抗剪强度参数的变化而变化；当η-c增大时，边坡的滑动面从近坡面逐渐向边坡内部移动；反之，η-c减小时，边坡的滑动面从边坡内部向近坡面移动.研究结果为边坡稳定性分析的理论和实践研究提供了参考.

Limit equilibrium analysis for effect of strength parameter of side slope on stability

In order to study the effect of the shear strength parameters of rock and soil on the stability of side slope,both theoretical derivation and calculation with Bishop limit equilibrium method were adopted to change the cohesive force c and internal friction angle  of rock and soil,respectively.And the variation of both safety factor and sliding surface of side slope was discussed.The results show that when the cohesive force or internal friction angle changes,the safety factor of side slope will change.However,the variation of sliding surface is affected by the function ηcwhich is related to the cohesive force and internal friction angle.When ηc is a constant value,the sliding surface will not change with the variation of shear strength parameters.When ηc increases,the sliding surface of side slope will move from the near slope surface to the inside of side slope gradually.Inversely,when ηc decreases,the sliding surface of side slope will move from the inside of side slope to the near slope surface.The present results can provide the references for the theoretical and practical investigation in the stability of side slope.