有限元方法在滑坡治理设计中的应用

发布时间：2018-10-26 20:29

【摘要】：改革开放以后,中国的经济飞速发展,交通建设成为我国重点建设项目。2014年底全国高速公路通车里程超过了11万公里,其中山区高速公路建设已成为国家交通发展的重点。云南省隶属我国西部,地质灾害严重,特别是滑坡灾害。云南省高速公路面临着穿越不良地质区域的挑战,所以研究滑坡对公路的影响,如何治理滑坡,对云南省公路建设是十分重要的。本文对目前国内外大型滑坡灾害进行了简单总结,并简单介绍了滑坡治理在公路建设中的意义;总结了国内外滑坡形成演化机制的研究现状以及国内外滑坡治理措施的研究现状;总结了有限元分析法在滑坡治理中的运用范围,详细介绍了有限元分析法在滑坡稳定性分析及支挡结构内力计算中的运用,并通过对比传统方法与有限元方法计算理论的区别,总结了传统方法的不足与有限元方法的优点。本文以昆明至轿子雪山旅游专线K9滑坡治理工程为背景,针对实际工程的地质环境、滑坡特点,通过有限元方法、传统极限平衡法对滑坡稳定性进行了分析并得出结论K9滑坡在非正常工况状态下处于不稳定状态。随后对滑坡治理措施进行了研究,提出了抗滑桩治理措施,并展开了抗滑桩的设计研究,通过有限元方法及传统方法,分别对抗滑桩的内力进行了分析计算,得出了抗滑桩的桩身弯矩、桩身剪力、桩侧土压力、桩身位移,为抗滑桩的设计提供了理论依据。最后通过有限元分析软件,对治理后的滑坡进行稳定性分析,证实了该治理措施的有效性。在滑坡稳定性分析及抗滑桩内力计算过程中,采用了有限元方法与传统方法,通过计算对比,验证了有限元法计算结果的正确性以及有限元方法在设计工作中较传统方法的易用性。
[Abstract]:Since the reform and opening up, China's economy has developed rapidly, and traffic construction has become a key construction project in our country. At the end of 2014, the mileage of expressway opened to traffic in China exceeded 110000 kilometers, and the highway construction in mountainous areas has become the focus of national traffic development. Yunnan Province belongs to the west of our country, the geological disaster is serious, especially the landslide disaster. The expressway in Yunnan Province is facing the challenge of passing through the bad geological area, so it is very important to study the influence of landslide on highway and how to control the landslide. This paper briefly summarizes the large landslide disasters at home and abroad, and introduces the significance of landslide control in highway construction. The present situation of landslide formation and evolution mechanism at home and abroad and the research status of landslide control measures at home and abroad are summarized. This paper summarizes the application scope of finite element analysis in landslide treatment, introduces the application of finite element analysis in landslide stability analysis and internal force calculation of retaining structure in detail, and compares the difference between traditional method and finite element method calculation theory. The shortcomings of the traditional method and the advantages of the finite element method are summarized. In this paper, based on the K9 landslide treatment project of Kunming Jiaozi Xueshan tourist special line, according to the geological environment and landslide characteristics of the actual project, the finite element method is adopted. The traditional limit equilibrium method is used to analyze the stability of landslide and it is concluded that K9 landslide is in unstable state under abnormal working conditions. Then the measures of landslide treatment are studied, and the anti-slide pile treatment measures are put forward, and the design research of anti-slide pile is carried out. The internal forces of anti-slide pile are analyzed and calculated respectively by finite element method and traditional method. The bending moment, shear force, soil pressure and displacement of pile body are obtained, which provides a theoretical basis for the design of anti-slide pile. Finally, the stability of the landslide after treatment is analyzed by finite element analysis software, which proves the effectiveness of the treatment measures. In the process of landslide stability analysis and internal force calculation of anti-slide pile, finite element method and traditional method are adopted. The correctness of the finite element method and the ease of use of the finite element method in the design work are verified.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U418.55

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