摘要
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。
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.
出处
《山西科技》
2009年第5期123-124,共2页
Shanxi Science and Technology
基金
广西建筑工程检测与试验重点实验室项目"广西地区膨胀土在公路建设中的灾害分析及处治技术"(桂科能07109005-11)
关键词
膨胀土
堑坡滑坍
膨胀力
有限元
expansive soil
sliding failure of slopes of cut
expansion force
finite element
