客运专线施工坐标系设计方案的研究

研究目的:为了实现高速度、高舒适度、高安全性的目标,客运专线对影响铁路平顺性的轨道几何尺寸和 定位精度,提出了较高的标准要求。客运专线施工坐标系,作为铁路线路勘测、设计、施工、运营和养护维修的测 量定位基准系统,其设计方案是否合理,投影变形是否能够得到有效控制,将对铁路工程建设质鼍产生直接影 响。传统的Ⅰ级铁路直接采用国家统一3°带坐标系,作为铁路线路施工坐标系的方案,已经不适应客运专线建 设标准的要求。本文研究的目的是设计并合理选定客运专线施工坐标系方案,有效控制投影变形对工程的影 响,以保证工程建设顺利实施和工程质量。 研究方法:本文通过对投影变形的基本原理、主要特征以及满足客运专线2．5 cm／km投影变形要求的区域 变化趋势分析,研讨了以铁路线路变坡点的国家统-3°带坐标和路肩设计高程为基本参数,设计客运专线施工 坐标系的方法。 研究结果:研究得出了在铁路线路ym-Hm断面趋势不同的条件下,客运专线线路施工坐标直接采用国家统 -3°带高斯正形投影平面直角坐标系,或设计采用抵偿投影面的3°带高斯正形投影平面直角坐标系、任意带 高斯正形投影平面直角坐标系、具有抵偿高程面的任意带高斯正形投影平面直角坐标系四种设计方案。 研究结论:研究得出的客运专线线路施工坐标系方案,达到了有效控制了投影变形对客运专线工程影响的 目的。

STUDY ON THE DESIGN SCHEME OF THE CONSTRUCTION COORDINATE SYSTEM OF PASSENGER DEDICATED RAILWAY LINE

Research purpose:In order to realize the high velocity, high comfort, high security, the high-speed railway (contains speed 200 km passenger dedicated railway line) makes high standard request for the track geometry size and the pointing accuracy that affects the railroad smoothness. As the survey localization datum system of the railway line survey, design, construction, operation and maintenance , the design plan of construction coordinate system of Passenger Dedicated Railway Line is whether reasonable, projection scale error whether can be under the active control, will have the direct influence to the railway engineering construction quality. Traditional level of railways uses the national unification 3?zone Gauss projection Plane rectangular coordinate system directly, but it is already unsuitable to Passenger Dedicated Railway Line construction standard request as the railway line construction coordinate system the plan. Therefore, in the Passenger Dedicated Railway Line feasibility study stage, connecting with project characteristics, the reasonable design and choice to the construction coordinate system of Passenger Dedicated Railway Line and effective control of the projection scale error, is important premise to guarantee the engineering construction smooth implementation and the project quality. Research method: Through the basic principle and the main characteristic of the projection scale error as well as satisfies Passenger Dedicated Railway Line 2.5cm/ km projection scale error request region change trend analysis, this text deliberated the method about taking the railway line each main slope change country unification 3?zone coordinate and the road should design elevation as the basic parameter to designs the construction coordinate system of Passenger Dedicated Railway Line. Research result: The research obtains four kind of plan , under the railway line ym-Hm section change tendency different condition ,the construction coordinate system of Passenger Dedicated Railway Line uses the national unification 3?zone Gauss conformal projection plane rectangular coordinate system directly, or the design uses projection datum plane with compensation effect 3?the zone Gauss conformal projection plane rectangular coordinate system, the arbitrary zone Gauss conformal projection plane rectangular coordinate system, the arbitrary zone Gauss conformal projection plane rectangular coordinate system with projection datum plane with compensation effect. Research conclusion: It achieves effectively to control projection scale error to the Passenger Dedicated Railway Line influence goal.