无碴轨道施工平面控制主要技术标准的研究

Research on the Main Technical Standards of Horizontal Control for Ballastless Track Construction

研究目的:通过理论研究,对无碴轨道施工平面控制测量的主要技术标准提出适宜的建议。研究方法:结合无碴轨道平顺性铺设精度指标要求,从10 m弦正矢不超过2 mm的限差分析入手,依据误差理论,对平面控制的主要技术标准进行理论分析和估算。研究结果:得出了客运专线无碴轨道铺轨控制基标、施工精密导线以及GPS平面控制的主要技术标准,并提出投影变形控制及施工坐标系统设计的建议。研究结论:客运专线对无碴轨道铺设精度标准的较高要求,进而对施工平面控制测量技术标准要求也显著提高。系统建立适宜精度标准的平面控制基准,是保障无碴轨道铺设精度指标顺利实现的前提。

Research purposes： Through the theoretical research, this paper puts forward some suitable suggestions on the main technical standards of horizontal control survey for ballasfless track construction. Research methods：This paper analyzes and estimates the main technical standards of horizontal control based on error theory. Firstly, it has analyzed the limiting error of 10 m - bowstring versine, which should be less than 2 mm, while considering the required precision of regularity of ballasfless track laying. Research results：This paper concluded the main technical standards of the control points for ballastless track laying on passenger dedicated railway lines, and the horizontal control of precise construction traverse and GPS survey. And the paper also puts forward some suggestions on projection deformation control and the design of construction coordinate system. Research conclusions：The passenger dedicated railway lines need higher precision standards on ballasfless track laying, and then the technical standards of horizontal construction control survey should be enhanced. So the es- tablishing of horizontal control datum with appropriate precision standards systematically is the precondition to make sure the precision of ballasfless track laying.