GNSS平面控制网在地下铁路中的应用及评定精度

摘要

在铁路工程建设中，与一般线路相比地下铁路工程的修建就变得更为严格，施工也变得更加复杂化，对精度的要求也变得更高。控制网是地铁工程建设的重要基础，平面控制网则是地下工程施工测量的基准，为了保证在地下铁路工程测量中成果的精确无误，GNSS平面控制测量技术在地下铁路工程中就需要被实时的进行。因此，需布设GNSS平面控制网，对地下铁路工程建设进行不停息、不定期的实时监测，以保证测量工作在地下铁路工程建设中准确无误的进行下去，确保工程质量达到预期的安全要求。详细介绍GNSS平面控制网的网型设计、布设点的原则、施测设计方案等一些重要过程，对其稳定性、可靠性和点位精度进行检验，对测量成果精度进行评定与分析，在日后施工作业中能够提供参考作用。%Underground railway construction is more strict than general railway and is more complicated in construction, and there is higher requirement of accuracy. Control network is an important foundation of the subway construction. Horizontal control network is the standard of underground engineering construction survey. In order to ensure the accuracy of the underground railway engineering measurement results, the measurement technology of GNSS horizontal control needs to be proceeded timely in the underground railway engineering. So, it needs to arrange GNSS horizontal control network to conduct constant and casual real-time supervision for underground railway engineering construction, to ensure the project quality to meet the expected safety requirements. This paper amply introduces some important process of GNSS horizontal control network, such as network type of study design, the principle of setting point, and method design and so on, evaluates and analyzes the accuracy of measurement results. It can provide reference in construction work in the future.