【摘要】 为了探讨土钉与框架预应力锚杆分级支护边坡的锚固效果及其协同工作性能,采用快速拉格朗日差分软件FLAC3D,对兰州某边坡进行分级柔性支护数值模拟研究;考虑分级支护施工顺序,对比分析了边坡支护前后的塑性破坏发展趋势、安全系数变化规律、位移变化情况以及土钉与预应力锚杆的受力性状。结果表明:边坡分级支护后,坡体的侧移与沉降得到了有效的控制,边坡稳定安全系数明显提高,同时分析得出了土钉与预应力锚杆的受力分布规律,为此类工程设计提供了一定的参考和建议。更多还原

【Abstract】 In order to study the classification of soil nailing and pre-stressed anchor supporting slope anchoring effect and the cooperative working performance,a fast Lagrange difference software FLAC3D was adopted to finish the numerical simulation of grading supporting on the slope around Lanzhou.A comparative analysis of the plastic zone and the safety factor was made between unreinforced and reinforced slopes according to the construction order of grading reinforced slope.The displacement change of the slope,and the force character of soil nailing and pre-stressed anchor were also studied.The results show that horizontal displacement and vertical displacement of the soil are controlled effectively,and the safety factor of slope stability is improved significantly due to the reinforcement.Inner stress distribution law of soil nailing and pre-stressed anchor are also studied.The conclusions have reference values for engineering optimum design.更多还原