半边街滑坡形成机制与基于有限元模拟的多场演化特征  

Formation Mechanism and Multi-field Evolutionary Characteristics of the Banbianjie Landslide

作　　者：郑志文 孙玄 ZHENG Zhiwen;SUN Xuan(Hubei Shenlong Geologic Engineering Reconnaissance and Survey Institute Co.Ltd.,Wuhan 430056,China)

机构地区：[1]湖北省神龙地质工程勘察院有限公司,武汉430050

出　　处：《科技和产业》2024年第14期281-288,共8页Science Technology and Industry

摘　　要：半边街滑坡属于典型的降雨型堆积层滑坡,在降雨作用下产生了较大程度的变形破坏,仍在继续发展。对半边衔滑坡地质条件与破坏特征进行了调查与分析,阐述了滑坡的变形机制。建立基于有限元的滑坡数值模型,采用渗流-应力耦合分析方法,研究了不同降雨工况下滑坡的稳定性及渗流场、位移场演化特征。结果表明滑坡位移主要受控于渗流场变化,在连续数天的暴雨或大暴雨工况下,极有可能产生整体滑动。研究成果为今后此类滑坡的预警、治理工程提供重要的理论依据。The Banbianjie landslide is a typical rainfall accumulation landslide,and continues to develop after significant deformations and damages.In this paper,the geological conditions and deformation characteristics of the landslide were investigated and analysed,and the landslide deformation mechanism was described.A typical profile of the landslide was selected to establish a numerical model based on finite elements.The GeoStudio software was used to carry out seepage-stress coupling analysis and calculation of the landslide,and the stability of the landslide and the evolution characteristics of seepage and displacement fields under different rainfall conditions were investigated.The research results provide an important theoretical basis for the early warning and management of such landslides in the future.

关 键 词：滑坡 降雨入渗 数值模拟 稳定性 渗流场 

分 类 号：X141[环境科学与工程—环境科学]