基于强度折减法下不同失稳判据对边坡稳定性的影响

The Influence of Different Instability Criteria on Slope Stability Using the Strength Reduction Method

为了充分了解不同失稳判据准则下强度折减法对分析边坡稳定性的影响,解决有关边坡失稳的问题,利用ABAQUS有限元软件平台开展了不同失稳判据准则下有限元强度折减法对分析均质土坡稳定性影响的研究。详细分析了在不同失稳判断准则下,利用强度折减法所得到的边坡安全系数之间存在差异性;并对不同失稳判据下土体强度参数的变化将对边坡稳定性所产生的影响进行了分析。研究结果显示:不同的失稳判据下利用强度折减法所得的安全系数之间存在一定的差异性,但其影响程度由土体强度参数在一定范围内的变化所决定;与此同时,土体粘聚力、内摩擦角和泊松比等参数的变化对于边坡临界状态时内部的塑性区的发展和滑动面的形状还存在一定的影响。

In order to comprehensively understand the impact of different instability criteria on slope sta-bility analysis using the strength reduction method and address issues related to slope instability,this study conducted research on the influence of different instability criteria using the strength reduction finite element method on the stability of homogeneous soil slopes.The study was carried out on the ABAQUS fi-nite element software platform.Detailed analysis was performed on the differences in slope safety factors obtained using the strength reduction method under different instability criteria.The study also analyzed how variations in soil strength parameters affect slope stability under different instability criteria.The re-search results indicate that there are differences in the safety factors obtained using the strength reduction method under different instability criteria.However,the extent of these differences depends on the varia-tion of soil strength parameters within certain ranges.Additionally,changes in soil cohesion,internal friction angle,Poisson's ratio,and other parameters also influence the critical state of the slope,the de-velopment of the plastic zone,and the shape of the sliding surface.