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该文以某水电站开挖边坡为例,利用强度折减法进行稳定性分析和求解安全系数,探讨强度折减法中抗拉强度和剪胀角对边坡稳定性的影响,并利用有限单元应力法校核强度折减法计算结果,对两种计算方法的计算过程和结果进行对比分析。通过对比分析发现强度折减法的计算结果比有限单元应力法计算结果略小,计算得到的安全系数都小于1,说明边坡不稳定。分析发现,剪胀角的取值对强度折减法的计算结果有一定的影响,抗拉强度的取值对强度折减法的计算结果影响很小。强度折减法计算所需参数更多,计算条件更加完整。有限单元应力法可以计算出单元的最大位移并且显示单元的变形。研究结果可为类似工程提供参考。
Taking the slope excavation of a hydropower station as an example, this paper analyzes the stability and solves the safety factor by strength reduction method, and discusses the influence of tensile strength and dilatancy angle on slope stability in strength reduction method. By using finite element stress Method of calculating the strength of the method of strength reduction, the calculation of the two methods and results of comparative analysis. Through comparative analysis, it is found that the calculated result of the strength reduction method is slightly smaller than that of the finite element stress method, and the calculated safety factor is less than 1, indicating that the slope is not stable. It is found that the value of dilatancy angle has a certain influence on the calculation result of strength reduction method, and the value of tensile strength has little effect on the calculation result of strength reduction method. Strength reduction method requires more calculation parameters, calculation conditions more complete. Finite element stress method can calculate the maximum displacement of the unit and display the deformation of the unit. The research results can provide reference for similar projects.