摘要
以城市轨道交通线路中的三次抛物线方程线形作为研究对象,利用几何分析方法,针对线路缓和曲线段的过渡区段,提出一种基于线路中心线的精确加宽量计算方法;结合缓和曲线段区间,形成系统的缓和曲线段加宽方法;通过控制变量法,同已有的线性插值加宽方法进行对比,说明该计算方法在一定参数范围内的线路条件下,相比于既有方法可以有效地减少隧道土方的开挖量,提高工程效率以及降低工程成本和施工周期。
The transition curve with cubic parabola equation in urban rail transit is studied in the paper. According to the plane geometry method, a new calculation method of metro gauge widening is put forward for transition sections based on the railway central line. The systematic widening measure is formed. Compared with the existing metro gauge widening method of linear interpolation by controlling parameters, the new calculation method is better for railway lines with certain range of parameters. It can reduce the earth and rock excava- tion in tunnel effectively and improve project efficiency in order to decrease cost and shorten construction period.
出处
《都市快轨交通》
北大核心
2015年第3期60-64,共5页
Urban Rapid Rail Transit
关键词
城市轨道交通
缓和曲线
地铁限界加宽
过渡区段
urban rail transit
transition curve
metro gauge widening
transition section
