GNSS平面控制网在地下铁路中的应用及评定精度

Abstract院Underground railway construction is more strict than general railway and is more complicated in construction and there ishigher requirement of accuracy. Control network is an important foundation of the subway construction. Horizontal control network is thestandard of underground engineering construction survey. In order to ensure the accuracy of the underground railway engineeringmeasurement results the measurement technology of GNSS horizontal control needs to be proceeded timely in the underground railwayengineering. So it needs to arrange GNSS horizontal control network to conduct constant and casual real-time supervision for undergroundrailway engineering construction to ensure the project quality to meet the expected safety requirements. This paper amply introduces someimportant process of GNSS horizontal control network such as network type of study design the principle of setting point and methoddesign and so on evaluates and analyzes the accuracy of measurement result