基于ANSYS的膨胀土路堑边坡的稳定分析

路堑边坡滑坍破坏是膨胀土公路修建中的常见病害，其破坏机理复杂，传统极限平衡法无法对它进行分析并得出合理解释。而数值分析方法能较好地分析边坡的应力、应变和塑性区分布，获得边坡变形过程和潜在滑面，直接给出稳定性评价的安全系数。文章基于ANSYS有限元分析软件，采用土的非线性弹塑性本构模型，应用有限元强度折减法理论对“南友”路宁明膨胀土堑坡的滑坍规律进行了分析。

Stability Analysis of Slopes of Cut of Expansive Soil Based on ANSYS

Sliding failure of the slopes of cut is very common in the construction of expansive soil roads and its failure mechanism is so complex that it cannot be analyzed and explained with the traditional limit equilibrium method. The numerical analysis can analyze slope stress, strain and plastic zone distribution well, get the deformation process and hidden slide faces and directly give the safety factors of stability evaluation. The paper, based on the ANSYS finite element analysis software, by adopting the non-linear elasto-plastic constitutive model of soil and finite element strength reduction theory, analyzes the sliding failure rules of the slopes of cut of Ningming expansive soil of Nanyou Road.