彬县大佛寺明镜台边坡稳定性分析
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摘要
彬县大佛寺明镜台为国家级重点保护文物。近年来,由于集中降雨和地震等因素的影响,明镜台台基出现了蠕动变形和局部沉降,并导致上部墙体出现裂缝、木结构发生损坏等。通过现场勘察和病害分析,定性分析得出明镜台滑坡形成机理。建立了合理的三维有限元模型,采用有限元强度折减法对明镜台边坡稳定性进行分析,动态地模拟了边坡失稳时滑移面形成的过程,得出了明镜台边坡失稳时的破坏形式和滑移面位置。
Mingjingtai of Big Buddhist Temple in Binxian County is the state-level key cultural relics.In recent years,owing to the influence of rainfalls and earthquakes,foundation of Mingjingtai suffered peristalsis deformation and partial sedimentation,which lead to the upper walls cracks and wood structure damages.Through geological survey and disease analysis,mechanism of Mingjingtai's landslide was obtained.Using the method of finite element strength reduction,three-dimensional finite element model was established and applied to the landslide stability numerical analysis of Mingjingtai.The forming process of the sliding surface was dynamically simulated,the failure model of the landslide was obtained and the location of sliding surface was obtained when the slope became instability.
Mingjingtai of Big Buddhist Temple in Binxian County is the state-level key cultural relics.In recent years,owing to the influence of rainfalls and earthquakes,foundation of Mingjingtai suffered peristalsis deformation and partial sedimentation,which lead to the upper walls cracks and wood structure damages.Through geological survey and disease analysis,mechanism of Mingjingtai's landslide was obtained.Using the method of finite element strength reduction,three-dimensional finite element model was established and applied to the landslide stability numerical analysis of Mingjingtai.The forming process of the sliding surface was dynamically simulated,the failure model of the landslide was obtained and the location of sliding surface was obtained when the slope became instability.
引文
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[2]郑颖人,王恭先.边坡与滑坡工程治理[M].北京:人民交通出版社,2007.
[3]洪海春,徐卫亚.地震作用下岩质边坡稳定性分析综述[J].岩石力学与工程学报,2005,24(增1):4827-4835.
[4]郑颖人,赵尚毅,张鲁渝.用有限元强度折减法进行边坡稳定分析[J].中国工程科学,2002,4(10):57-78.
[5]赵尚毅,郑颖人.用有限元强度折减法求边坡稳定性系数[J].岩土工程学报,2002,24(3):343-346.
[6]朱伯芳.有限单元法原理与应用[M].北京:中国水利水电出版社,2009.
[7]陈祖煜.土质边坡稳定分析——原理、方法、程序[M].北京:中国水利水电出版社,2003.
[8]刘杰,张学深.简单边坡的稳定性分析[J].岩土力学,2002,23(6):714-716.
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