彬县大佛寺明镜台边坡稳定性分析

Landslide stability analysis of Mingjingtai of Big Buddhist Temple in Binxian County

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.