郑西客运专线新、旧平面控制系统及其各自设计中线转换相关问题探讨-《高速铁路技术》

文章信息/Info

Title:: Discussion on New and Old Plane Control Systems and Transition between Its Design Center Lines of Zhengzhou-Xi'an Dedicated Passenger Line

Author(s):: LI Wei; Second Civil Construction Design & Research Institue, China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China

Keywords:: plane control system|B-class GPS control network|design center line|midpoint of curve|adjustment; ballastless track; laying precision|length deformation

摘要:: 《客运专线无砟轨道铁路工程测量暂行规定》颁布的滞后,造成新、旧2种控制系统共存的现象。为尽快采用新的控制系统,确定已经施工的线下工程满足新系统的要求,需找出新、旧平面控制系统的各自设计中线的相互关系,并完成转换。在新的坐标系统下,用坐标转换法确定新坐标系统下的中线位置,同时对新、旧坐标系统的长度变形差值在新系统中予以等分,保证原施工图可以继续使用,在线下工程完成后按新的坐标系统生成新的线路平面交铺轨单位使用。

Abstract:: Coexistence of new and old control systems occurs due to the lag of The Provisional Regulations for Survey of Ballastless Track Railway Engineering. In order to use the new control system as soon as possible and determine that the under-track works completed meet the requirements of new system, it is necessary to find out a relationship between design center lines of old and new plane control systems and complete their conversion. To ensure that the original construction drawing can continue to be used, the coordinate transformation method is used to determine the location of the center line in the new coordinate system, at the same time length deformation difference of the new and old coordinate system shall be equal portions. After the under-track work is completed, a new line plan shall be generated according to the new coordinate system and delivered to the track laying construction unit.