基于极限平衡法的锚索框格梁支护设计

Research on design of anchor cable frame beam support based on limit equilibrium method

由于锚索框格梁具有施工成本低、周期短、加固方式灵活等优点,在公路工程的边坡加固中被广泛应用。基于极限平衡法的分析过程研究了岩质边坡单平面滑动破坏的受力机理,讨论了公路边坡安全系数的计算方法。结合我国西南地区某高速公路高边坡防护实际工程,研究了基于极限平衡法的锚索框格梁锚索索力、锚固角、锚固段长度、锚索长度及间距的设计,并与实际工程的保守型设计对比后发现,采用极限平衡法设计的锚索参数符合施工要求。这对高速公路高边坡稳定性分析及锚索框格梁支护的研究,具有一定的参考和借鉴意义。

The anchor cable frame beam has advantages of low construction cost,short period and flexible reinforcement method,which is widely used in slope reinforcement of highway engineering.In order to study the application of limit equilibrium method in stability design of highway high slope,the loading process of single plane sliding failure of rock slope was studied based on the analysis process of limit equilibrium method,and the calculation method of safety factor of highway slope was discussed.Combined with the actual high slope protection project of a highway in southwest China,the design of anchor cable force,anchor angle,anchor section length,anchor cable length and spacing based on the limit equilibrium method was studied.It was found that the parameters of the anchor cable designed by limit equilibrium method meet the requirements of construction compared with conservative design of actual project.The research of this paper has certain reference value for the analysis of stability and research of anchor-cable frame beam support of highway engineering slope.