基于表面位移的滑坡稳定性评价及预警阈值探讨

发布时间：2018-04-29 13:57

  本文选题：位移-时间曲线 + 改进切线角　； 参考：《西南科技大学》2016年硕士论文

【摘要】：滑坡是一种非常严重的地质灾害,同时我国也是世界上滑坡地质灾害分布最广泛,发生最频繁,程度最严重的国家之一。每年因滑坡泥石流等地质灾害所造成的经济损失达上百亿元,死亡数百人,对国家的经济发展及人们的生命财产安全造成了极大的威胁。由此,滑坡灾害的监测预警及稳定性评价也逐渐成为了人们普遍关注的问题。在单体滑坡稳定性评价中,位移是滑坡稳定状态最直观的反映,并且变形量测方法简单,所以它在滑坡监测预警中越来越引起人们的重视。针对目前滑坡稳定性评价的复杂性和不确定性,本文引入一种基于累计位移-时间特征曲线的改进切线角的概念,对改进切线角作进一步改进,并以此作为判据,结合卫星实时监测的手段,对滑坡体的稳定性进行分析,此种方案具有监测方法稳定直观,分析结果实时可靠的优势。以四川省都江堰市塔子坪滑坡为研究对象,依据滑坡体表面位移-时间曲线的变形规律,结合实地监测数据对塔子坪滑坡的切线角进行分析,从而划分滑坡体的各变形阶段。依据滑坡体的表面位移规律及宏观变形情况对滑坡的变形机制进行分析,确定其运移形式。结合滑坡体的运移机制对滑坡进行加固治理。并通过对滑坡体加固前后的数据相对比,论证了滑坡体重力挡墙治理方法的可行性,并得出了治理后的滑坡体目前已趋于稳定状态的结论。
[Abstract]:Landslide is one of the most serious geological disasters in the world. At the same time, China is one of the countries with the most extensive distribution, the most frequent occurrence and the most serious degree of landslide geological disasters in the world. Every year, the economic losses caused by landslide and debris flow and other geological disasters amount to more than 10 billion yuan, and hundreds of people are killed, which poses a great threat to the economic development of the country and the safety of people's lives and property. Therefore, the monitoring, warning and stability evaluation of landslide disasters have gradually become a common concern. In the single landslide stability evaluation, displacement is the most intuitive reflection of landslide stability, and the deformation measurement method is simple, so it attracts more and more attention in landslide monitoring and early warning. In view of the complexity and uncertainty of landslide stability evaluation at present, an improved tangent angle based on accumulative displacement-time characteristic curve is introduced in this paper. The improved tangent angle is further improved and used as a criterion. The stability of landslide body is analyzed by means of satellite real-time monitoring. The method is stable and intuitive, and the analysis results are real-time and reliable. Taking the Taziping landslide in Dujiangyan City, Sichuan Province as the research object, according to the deformation law of the displacement-time curve on the surface of the landslide, and combining with the monitoring data on the spot, the tangent angle of the Taziping landslide is analyzed, and the deformation stages of the landslide are divided. According to the law of surface displacement and macroscopic deformation of landslide, the deformation mechanism of landslide is analyzed and its migration form is determined. Combined with the migration mechanism of landslide, the landslide is strengthened and treated. By comparing the data before and after the reinforcement of the landslide body, the feasibility of the treatment method of the gravity retaining wall of the landslide body is demonstrated, and the conclusion that the landslide body has become stable after the treatment is obtained.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P642.22
，

本文编号：1820223