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基于强度折减法,采用大型有限元软件,考虑复杂地形条件,对高速公路高填方路基稳定性进行三维非线性有限元分析。采用有限元计算是否收敛作为对边坡稳定性的失稳判据,路基本构模型采用D rucker-Prager理想弹塑性模型,得到高填方路基安全系数,计算结果证明三维非线性有限元强度折减法可以较好反映现场高填方路基的稳定性。
Based on the strength reduction method, a large-scale finite element software was used to consider the complex terrain conditions, and the three-dimensional nonlinear finite element analysis of the highway embankment stability was carried out. Using the finite element method to determine whether the convergence is the instability criterion for slope stability, the Drucker-Prager ideal elastic-plastic model is adopted for the basic subgrade model to get the safety factor of high embankment. The calculation results show that the three-dimensional nonlinear finite element strength fracture Subtraction can better reflect the stability of high embankment on site.