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根据FLAC3D的特点和基本原理,结合黄土边坡的变形特点,研究某典型黄土-基岩边坡的变形破坏过程,分析边坡分步开挖坡体应力和位移的变化规律,研究表明:边坡坡脚开挖,对于边坡的整体稳定性影响较为严重,很有可能引发边坡破坏;随着开挖的进行,坡体主要位移逐渐转变为水平位移,且开挖后应力在坡脚处集中。依据对边坡开挖过程中位移和应力的分析,表明随着每一级土体的开挖,边坡位移迅速增大,因此控制开挖过程中坡体位移是边坡开挖工程中重要工作,应采取对边坡坡面和坡脚加固的措施,以缓解坡脚应力集中,减小和避免坡体位移。
According to the characteristics and basic principles of FLAC3D and the deformation characteristics of loess slope, the deformation and failure process of a typical loess-bedrock slope is studied, and the variation regularity of stress and displacement of slope is analyzed. The results show that: The excavation of slopes and slopes will affect the overall stability of the slopes more seriously and may lead to the failure of slopes. With the excavation, the main displacements of the slopes gradually transform into horizontal displacements, Office concentration. Based on the analysis of the displacement and stress during the excavation of the slope, it is shown that with each excavation of the soil, the displacement of the slope increases rapidly. Therefore, controlling the displacement of the slope during the excavation is important in the excavation of the slope Work should be taken to slope slope and foot reinforcement measures to ease the slope stress concentration, reduce and avoid slope displacement.