黄土湿载结构性模型在黄土边坡动力稳定性分析的应用
Application of the Structural Model Under Stress and Moisture in Loess Slope Dynamic Stability Analysis

土的结构性是土颗粒空间排列和粒间粘结综合作用所表现出来的力学效应。在地震荷载作用过程中,天然土边坡的结构性参数主要体现应力和变形的共同作用,反映地震荷载作用过程中应力和变形的协调关系及结构性土的结构损伤过程(即抗剪强度参数的变化规律)。首先通过分析认为用结构性参数来定量判断地震荷载作用过程中黄土边坡的稳定性更具合理性,其物理意义更明确;其次通过分析黄土地区某一天然边坡在Ⅸ度地震烈度作用下的黄土边坡动力稳定性,验证结构性参数作为边坡稳定性分析判据的可行性,且这一方法能定量地确定边坡滑动面的位置及所对应的安全结构性参数。
The structural property of soil is derived from mechanical effects as well as the comprehensive effect of the spatial arrangement and bonding effects of soil particles. During the process of seismic loads, the structural parameters of natural loess slope are derived mainly from the combined effects of stress and deformation. Meanwhile, that parameters reflected the coordination between stress and deformation during the process of seismic load and the structural damage process of the loess during the seismic process. It was shown that using structural parameters to quantitatively determine the loess slope stability was more reasonable during the process, and its physical meaning was very clear. Second, analysis of the dynamic stability of the natural loess slope was used to verify the feasibility criterion by structural parameters, and this method could be used to quantitatively determine the location of slip surfaces and corresponding structural parameters.