【作者】 尹紫红；

【导师】 姚令侃；

【作者基本信息】 西南交通大学 ， 道路与铁道工程， 2006， 硕士

【摘要】 地震滑坡因其巨大的致灾力而广泛引起人们的关注，仅20世纪，地震滑坡已经造成了数万人丧生和几十亿美元的损失。地震滑坡一直是困扰土木工程界的一个世界性技术难题，其发生和发展过程与很多因素有关，至今尚未得到根本解决。 本文在广泛吸取国内外地震作用下滑坡稳定分析研究经验的基础上，通过地震滑坡分区，分析了地震滑坡与地震震级、震中距、震源深度的关系，并研究了地震对滑坡的影响机理。 在对西攀高速公路沿线滑坡进行全面调查的基础上，运用地震危险分析，确定了地震烈度的分区，给出了滑坡灾势评估。对全线滑坡工点进行调查，找出与工程密切相关的15处滑坡，确定Ⅷ度地震区以德昌滑坡为典型分析对象，Ⅶ度地震区以米易滑坡为典型分析对象。 通过定量分析地震力和滑坡稳定性之间的关系，对地震作用下滑坡稳定性分析进行研究。以地震加速度作为反映地震荷载的主要因素，以德昌、米易滑坡为例，基于有限元理论，开展了地震作用下滑坡的动力学分析，运用GEO—SLOPE软件模拟地震对滑坡的影响机制，用QUAKE／W模块分析软件进行求解，研究滑坡稳定性的变化规律。主要内容包括：运用GEO—SLOPE软件，获得了米易电力公司滑坡、德昌滑坡在不同地震加速度作用下的安全系数随时程的变化曲线；在此基础上对两个滑坡在自然状态和采取排水措施两种情况下的计算结果进行了比较，讨论并分析了地震对滑坡稳定性的影响，从而对工程设计措施提出技术建议。这些工作可为滑坡的抗震设计提供理论依据和指导。 通过对地震区米易、德昌滑坡的两年GPS外部变形监测，提出了地震区滑坡稳定性监测的原则和方法。更多还原

【Abstract】 Earthquake-induced landslide has got people’s attention because of its huge disaster strength. Only in 20th century, the earthquake-induced landslide had resulted tens of thousands lives loss and several thousands US dollars losses. Earthquake-induced landslide has always been a worldwide difficult problem in the civil engineering, which is related with many factors and haven’t been solved its occurrence and development.Based on the previous study on the stability of landslide induced by the earthquake, through zoning the earthquake-induced landslide, in this paper the author studies the relation between the earthquake-induced landslide and seismic parameter, the influence mechanism and factors of earthquake to landslide.With the widespread investigation to landslide along the highway route from Xichang to Panzhihua, through the analysis of the risk of earthquake along the route, the author made out the evaluation on the earthquake-induced landslide along the highway and gave the zonal spot of earthquake intensity. Through the investigation to landslides along the route, the author chose 15 landslides which are related closely with engineering, the author chose Dechang landslide as the typical object of Ⅷ dgree and Miyi landslide as Ⅶ degree.Through the studying on landslide stability induced by earthquake and qualitativly analyzing the relation between the landslide stability and seismic force, the author found the destructive phenomenon of earthquake was not appearing or developing as constant force, but was related closely to earthquake acceleration. The aim of this paper consists in the method to analyze the landslide stability induced by earthquake and to find out the effective measure to prevent landslide’s occurence.Based on the finite element theory, through using GEO-SLOPE software to modify the influence mechanism of earthquake to landslide and the rule of landslide stability, the author built the dynamics analysis model of landslide and took Dechang landslide as example, used QUAKE/W module software to更多还原