This paper proposes a smoothness optimization method of horizontal alignment based on orthogonal least squares and the theory of controlling the track smoothness. With this method, multiple curve types can be fitted simultaneously according to the maintenance requirements, and the residual deviation in the track is optimized according to the smoothness standard. The target alignment of the tamping operation is constructed, providing support for the maintenance of the ballasted track. The implementation results show that the proposed method fully adapts to operating railway maintenance conditions, and the optimized design parameters resemble the field observation results. The lateral profile track quality index is reduced from 0.78 to 0.39, the amplitudes of the 10 and 60 m mid-chord offset decrease by 73% and 52%, respectively, and the 30-m vector distance difference decreased by 53%, indicating effective improvement.

中文翻译：

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考虑有砟轨道养护的水平线形平滑度优化方法

提出了一种基于正交最小二乘和轨道平滑度控制理论的水平线形平滑度优化方法。该方法可以根据维修要求同时拟合多种曲线类型，并根据平滑度标准优化轨道中的残余偏差。构建了捣固作业的目标线形，为有砟轨道的维护提供了支持。实施结果表明，所提方法完全适应铁路运营养护工况，优化后的设计参数与现场观测结果相似。横向剖面轨迹质量指数从0.78降低到0.39，10和60 m中弦偏移幅度分别降低了73%和52%，