我国高速公路建设的又好又快的发展，面临滑坡稳定性分析与治理等问题也越来越多。特别是在地质条件复杂的山区修建高速公路更容易产生滑坡灾害，本文以国家高速公路包头至茂名线陕西境黄陵至延安扩能公路田塔村滑坡为背景，采用工程地质学、结构力学以及数值模拟等方法，对滑坡的的工程地质条件进行了分析，在此基础上，提出了合理的工程治理措施，以其为该滑坡和今后类似的滑坡提供一定的借鉴作用。 主要研究成果如下: 结合滑坡形成的地质环境背景和滑坡基本特征与变形特征，得出当降雨时，地下水被阻隔于上部岩土层中，水浸粘土层，不易形成软弱滑动面，难于引发上部黄土地层沿土石界面发生牵引式滑动。 定性分析结果是该滑坡处于稳定状态不管在天然然况或者饱和状况下，以及用不平衡传递系数法对滑坡的四个主剖面进行计算得出未开挖时不管天然还是饱和安全系数大于1.20，开挖后不管天然还是饱和安全系数小于1.00。 用数值模拟方法模拟滑坡未开挖状态下表明，存在滑体沿滑面滑动的危险较小。用数值模拟方法模拟滑坡开挖状态下表明，开挖会对滑坡的稳定性产生非常大的影响，尤其在水的作用下滑体沿滑面有移动下滑的趋势。 根据通常的滑坡治理工程的原则和工程措施，对滑坡的工程地质条件以及稳定性评价的结果进行了系统的分析与研究，提出了抗滑桩的设计理论和计算的方法。 根据抗滑桩的治理方案，运用FLAC3D软件进行在综合治理措施以及考虑水的作用即饱水状态下建立地质模型，模拟该滑坡稳定状态，对已有的滑坡治理措施进行分析评价。

The development of China's highway construction is more and more rapid, it is faced with problems of analysis and control the landslide stability more and more. In particular, the construction of highways in complex geological conditions mountainous are more prone to landslide disasters.The National Highway paper Baotou to Maoming line Huangling to Yan'an, Shaanxi border expansion Tower Village Tian highway landslide as the background, using of engineering geology, structural mechanics and Numerical simulation methods for engineering geological conditions of landslides were analyzed ,on the basis of proposed sound engineering control measures for the landslide and its similar landslide provide a reference in the future. The main results as follows: Combined with the landslide geological environmental background and the basic characteristics and deformation characteristics basic characteristics of landslide, it is concluded that the groundwater is barrier in the upper layers of soil and water leaches of clay layer in the rainfall,.It is not easy to form soft sliding surface, it is difficult to traction slide for upper loess strata along the interface of stone and earth occurred. The results of qualitative analysis is that the landslide is in a stable state regardless of the status in the natural course or a saturated condition, and with unbalanced transfer coefficient method for the four main sectional landslide is calculated that when no excavation regardless of natural or saturation safety factor greater than 1.20, after excavation whether natural or saturated after excavation safety factor of less than 1.00. It is simulated by numerical simulation that the landslide of the no excavation state indicates that there is a risk slider sliding along the sliding surface is small. It is simulated by numerical simulation that the landslide of the excavation state indicates that that the landslide stability excavation will have a very big impact, especially in the role of water fell body along the slip surface is a moving downward trend According to the usual landslide treatment engineering principles and engineering measures, landslide engineering geological condition and the results of evaluation of the stability were analysed and researched Systematically, the design theory and calculation method of the anti slide pile are proposed. According to the treatment scheme of the anti slide pile, it is established geological model by FLAC3D software in comprehensive control measures and consider the role of water is water saturated state established geological model and it is simulated the stable state of the landslide ,it is evaluated for control measures of the existing landslide