连续自由设站法在常州地铁轨道控制网中的应用

地铁与高铁相比有地下隧道空间狭小拥挤,曲线半径小,通视条件差的特点。针对传统的铺轨基标测量方法难度大、效率低,结合地铁地下隧道的结构与施工特点,尝试了利用连续自由测站法进行地铁铺轨控制网的测量,讨论了控制点的埋设要点以及作业方法,对不同区段控制网的接边结果进行了精度分析。工程实践结果表明,基于自由测站方法的铺轨控制网布设灵活、方便,测量精度能够适应地下隧道的复杂环境,满足地铁铺轨施工的要求。

The Application of Continuous Free Station Method in Rail Control Network of Changzhou Urban Rail Transit

Compare with high-speed rail,urban rail transit has the characteristic of the small underground tunnel space and curve radius and the poor view condition.The traditional measure of track-laying control standard in rail transit projects is huge difficult,low efficiency,etc.Combined with the structure and construction characteristics of underground tunnels in urban rail transit,a method based continuous free station is tried in rail control network of urban rail transit,the key of control points embedding and the measuring method is discussed and the accuracy analysis of the jointing results of different section control networks is carried out.The engineering practice results show that control network measurement can meet the requirements of rail control network track construction.