铁路建筑限界缓和曲线地段加宽研究

Study on Widening of Railway Structure Clearance on Transition Curve

目前铁路现行的规章、规范及设计手册中,未明确缓和曲线地段建筑限界加宽计算方法。为找出一种误差值小、使用方便的缓和曲线地段建筑限界加宽计算方法,根据图解法相关数据,绘制分析不同曲线要素组合的加宽值曲线,研究总结铁路建筑限界缓和曲线地段加宽值变化规律。根据加宽曲线特点,利用多项式曲线拟合的方法提出缓和曲线地段内侧加宽、外侧加宽及运动附加超高通用计算公式。与图解法计算结果对比表明,通用公式计算误差满足测量误差限值要求,证明通用计算公式是正确可靠的。提出的通用计算公式可供铁路相关技术人员工作时和《铁路技术管理规程》等规章修订时参考。

According to current regulations,codes and design manuals,there are no defined calculation methods for widening of railway structure clearance on transition curve. In order to find a less-error and easy-to-use method for widening of railway structure clearance on transition curve,this paper draws and analyzes the widening curve of different curve element combinations,and puts forward the variation rule of widening values of railway structure clearance on transition curve based on the analysis of data of the graphic method. According to the characteristics of the widening curve and by using the method of Polynomial curve fitting,the study presents the general calculation formulas of the inner and outer widening and movement added super-elevation. The comparison with the graphical method shows that the general formula error satisfies the requirement of the measurement error limit and the general formula is correct and reliable. The general formulas can be referenced by the relevant technical personnel of railway in routine work and in the amendment of Railway Technical Management Rules.