（毕业学术论文设计）-原209国道K25+045处右侧边坡修复工程边坡稳定性及支护研究论文.doc

PAGE \* MERGEFORMAT II l 摘 要 边坡稳定性及支护研究是岩土工程中的重要课题。本文以“原209国道K25+045处右侧边坡修复工程”为依托，对土质路堑边坡进行挡土墙支护前后的应力、位移及稳定性分析，具有一定的理论和现实意义。 本文在广泛了解国内外边坡稳定性问题研究现状的基础上，分析了土质路堑边坡的病害特点及原因，并介绍了土质边坡的病害治理方法；阐述了有限元弹塑性分析和强度折减法的基本原理和ANSYS软件的应用特点，介绍了挡土墙的支护设计方法；阐明了土质路堑边坡稳定性分析及支护设计在ANSYS中的实现过程；对209国道主干线湖北段K25+045处原209国道右侧边坡，运用ANSYS软件，采用有限元强度折减法，求得该边坡的稳定系数（0.93），然后提出了该边坡的抗滑桩支护方案，建立了相应的力学模型，分析了支护后的边坡应力、变形和稳定性，并通过对支护前后边坡的应力、变形和稳定系数的比较分析，结合多方面因素对土质路堑边坡的支护稳定性进行了综合评价。 本文最后的主要研究结果是使用挡土墙支护后的边坡稳定性（稳定系数1.25）强于支护前稳定性，该成果可为原209国道K25+045处边坡修复工程提供参考，也可为高速公路上的土质路堑边坡的支护设计提供理论上的依据。 关键词: 土质，路堑边坡，稳定性，挡土墙，有限元，强度折减法 Abstract The study on slope stability and supportting is an important subject in the field of geotechnical engineering. On basic of the slope repair project at State Road 209 of right side K25 +045,the stress, displacement and stability of soil cutting slope whether supported by anti-sliding pile or not are analysed in this thesis. And the results have momentously theoretical and realistic significance. Based on widely cognizancing the existing research state of slope stability abroad and national, the diseases and their reasons of the soil cutting slope are analysed, and the treatment methods of soil slope’s diseases are introduced. the fundamental theory of the Elasto FEM, the strength reduction method and the application of ANSYS software are expounded. the design method of Retaining wall are introduced, and how to implement the stability analysis and the support design of roil cutting slopes with ANSYS software is clarified. Using FEM, the strength reduction method and ANSYS software, the stability factor of the bedding rock cutting high slope on the HuRong national highway between Yichang and Enshi in HuBei province is calculated, which is 0.9. Then the supported scheme of anti-sliding piles to the solpe is propounded, the corresponding mechanics model is constructed, the stress, displacement and stability of the slope when supportted by anti-sliding piles are analysed, and they are compar