山区铁路路基工程预应力锚索技术边坡加固方法研究

Research on Slope Reinforcement Method of Prestressed Anchor Cable Technology for Railway Subgrade Engineering in Mountain Areas

由于传统的山区铁路路基工程边坡加固方法在加固材料选取上能力较差,且未对山区环境进行精准分析,导致加固后路基频繁发生沉降且沉降值较大。因此,文章提出山区铁路路基工程预应力锚索技术边坡加固方法。首先根据山区锚索件安全系数,将锚索锚固段分为拉力型与压力型两部分,并完成预应力锚索锚固设计。然后采用有限元分析和位移差值函数计算的方式,预测山区铁路路基工程沉降数据。最后根据《建筑边坡工程技术规范》(GB 50330—2013)设定锚固安装参数与施工方法,将锚索技术应用到边坡加固方法中。根据试验区域的真实土样,构建模拟试验槽。试验结果表明:该方法可有效控制铁路路基下沉与位移,进一步实现了路基的加固。

Due to the poor ability of traditional slope reinforcement methods for railway roadbed engineering in mountainous areas in selecting reinforcement materials and the lack of precise analysis of mountainous environments,frequent settlement and large settlement values occur in the reinforced subgrade.Therefore,a slope reinforcement method using prestressed anchor cable technology for railway subgrade engineering in mountainous areas is proposed.Firstly,based on the safety factor of anchor cables in mountainous areas,the anchor cable anchoring section is divided into two parts:tension type and pressure type,and the prestressed anchor cable anchoring design is completed.Then,finite element analysis and displacement difference function calculation are used to predict the settlement data of railway subgrade engineering in mountainous areas.Finally,according to the Technical Code for Building Slope Engineering(GB 50330—2013),anchor installation parameters and construction methods are set,and anchor cable technology is applied to slope reinforcement methods.Based on the actual soil samples in the experimental area,construct a simulated experimental groove.The experimental results show that this method can effectively control the settlement and displacement of railway subgrade,further achieving the reinforcement of the subgrade.