基于数值计算的岩土混合边坡锚固优化设计研究

Research on Anchorage Optimization Design of Rock-soil Mixed Slope Based on Numerical Calculation

为进一步提高山区道路建设水平,文章首先探讨了岩土混合边坡的稳定性影响因素及不同数值计算方法的特点、计算原理、适用条件及判据;随后以某市政快速路路堑高边坡为研究对象,利用理正岩土7.0软件建立二维平面模型,计算了岩土混合边坡安全系数随锚索(杆)参数和锚索(杆)倾角的变化规律,结果表明,预应力锚索(杆)框架梁加固后边坡安全性满足相关规范要求,且随着锚索(杆)长度的增加而增加,随着锚索(杆)倾角的增加呈“倒V”形变化,即先增加后减小。

In order to further improve the level of road construction in mountainous areas,this paper first discusses the factors affecting the stability of rock-soil mixed slopes and the characteristics,calculation principles,applicable conditions and criteria of different numerical calculation methods.Then,taking a high cutting slope of a municipal expressway as the research object,a two-dimensional plane model is established by using Lizheng geotechnical 7.0 software,and the variation law of the safety coefficient of the rock-soil mixed slope with the parameters of the anchor cable(rod)and the inclination angle of the anchor cable(rod)is calculated.The results show that the safety of the slope after the reinforcement of the prestressed anchor cable(rod)frame beam meets the relevant specification requirements,and the safety coefficient increases with the increase of the length of the anchor cable(rod),and changes in an"inverted V"shape with the increase of the inclination angle of the anchor cable(rod),that is,it increases first and then decreases.