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引入FLAC-3D程序及强度折减方法,应用数值模拟技术对某算例多级边坡在加固前后的稳定性进行了计算与分析。对比分析了边坡加固前后的安全系数变化规律、位移变化情况以及锚杆轴力的分布规律。计算结果表明:边坡分级支护后,坡体的水平位移和竖向沉降得到有效的控制,同时也得出了预应力锚杆轴力的分布规律,边坡稳定安全系数明显提高。为分级支护结构的参数设计提供一定的理论参考。
The FLAC-3D program and the strength reduction method are introduced. The numerical simulation is used to calculate and analyze the stability of a multi-level slope before and after reinforcement. The change rule of safety factor, displacement change and distribution law of anchor axial force before and after slope reinforcement are compared and analyzed. The calculation results show that the horizontal displacement and vertical settlement of the slope are effectively controlled after the grade support, and the distribution of the axial force of the prestressed anchor is also obtained. The safety factor of slope stability is obviously improved. It provides some theoretical reference for the parameter design of grading support structure.