蒙华铁路张坊隧道洞外独立控制网布设技术

Layout Technology of Independent Control Network Outside Zhangfang Tunnel in Mongolia China Railway

为了解决长大隧道洞外贯通中误差控制难的问题,以蒙华铁路张坊隧道的洞外独立控制网布设为例,从隧道洞外独立控制网的等级设计、网形设计和贯通误差估算到外业数据采集、处理、网平差及平曲线参数转换等方面对长大隧道洞外独立控制网布设进行了系统的阐述,并通过实测数据分析,证明了所布设的隧道洞外独立控制网的贯通误差满足规范要求。

In order to solve the difficulty in error controlling during the run-through of long tunnel, this paper took the lay- out technology of independent control network outside Zhangfang Tunnel in Mongolia China Railway as an example, focused on the layout technology mainly from the aspects of the grading design of independent control network outside the tunnel, network design and error estimation to the field data collection, processing and network adjustment and horizontal curve parameter conversion. Additionally, through the measured data analysis, it proved that the breakthrough error of independent control network outside the tunnel could meet the requirements of specification.