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首先利用拉格朗日有限差分法计算得到边坡开挖后的应力应变状态,然后通过滑面应力分析边坡的整体稳定状态,不仅可得到传统的稳定安全系数,而且可得到边坡的变形与受力特征。针对大连某高边坡工程实例,通过极限平衡法与数值分析法,分别得到原始自然边坡、开挖无支护边坡、预应力锚索加固边坡的整体稳定安全系数。工程实践证明,采用有限差分法和滑面应力分析法可得到高边坡工程的变形值与稳定安全系数,值得在高边坡工程中推广应用。
Firstly, the stress-strain state of the slope after excavation is obtained by Lagrange finite-difference method, and then the overall stability of the slope is analyzed by sliding-surface stress, which not only obtains the traditional stability safety factor but also obtains the deformation of the slope And force characteristics. According to the engineering example of a high slope in Dalian, the overall stability safety factor of the original natural slope, the excavation unsupported slope and the prestressed anchorage cable reinforcement slope are respectively obtained by the limit equilibrium method and the numerical analysis method. The engineering practice proves that the deformation and stability safety factor of high slope engineering can be obtained by finite difference method and sliding surface stress analysis method, which is worth popularizing and applying in high slope engineering.