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针对芭蕉220kV开关站高填方加筋土边坡,介绍了该边坡的变形失稳特征。通过室内试验及参数分析合理地确定边坡计算参数,建立了有限元模型,并结合极限平衡法对加筋土边坡的变形机制进行了研究。结果表明:边坡的破坏模式为基底软弱层沿最大剪应力带的剪切破坏,基底软弱层的存在是边坡失稳的根本原因,而降雨入渗及填土加载等是边坡失稳的诱发因素。
According to the high fill reinforced slope of Bazhou 220kV switchyard, the deformation and instability characteristics of the slope are introduced. Through the indoor experiment and parameter analysis, the calculation parameters of slope are reasonably determined, the finite element model is established, and the deformation mechanism of reinforced soil slope is studied with the limit equilibrium method. The results show that the failure mode of the slope is the shear failure of the weak layer along the maximum shear stress zone, and the existence of the weak basement is the root cause of slope instability. However, the slope infiltration and the loading of soil are the instability of the slope The predisposing factors.