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结合巴基斯坦拉合尔地铁项目,介绍了巴方布设控制网的现状,针对既有控制网存在的问题,对既有控制网的布设及测量进行了优化与升级,以满足线上轨道施工的要求,并阐述利用GNSS接收机与数字水准仪施测过程及数据处理流程,确定了GNSS与水准测量数据处理方案,优化后的控制网既兼容既有控制网又提高了精度,目前已应用于地铁轨道施工并取得了良好的效果,最后提出了地铁项目控制网测量的几点建议。
Combined with the project of Lahore metro in Pakistan, the current situation of the deployment of control network in Pakistan was introduced. In view of the existing problems of existing control network, the layout and measurement of the existing control network were optimized and upgraded to meet the requirements of on- And elaborated the use of GNSS receiver and digital water level measuring process and data processing flow to determine the GNSS and leveling data processing program, the optimized control network is compatible with both existing control network and improve the accuracy of the railway has been applied to the construction of the track And achieved good results. Finally, some suggestions on the measurement of subway project control network are put forward.