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针对常规水准测量存在效率不高、高程点精度不均匀等问题,该文分析了《高速铁路工程测量规范》(TB10601—2009)中介绍的两种CPⅢ高程控制网测量方法——德国中视法和中国矩形法的特点及其在实践中的应用,在此基础上提出了外业测量效率更高的新矩形法、单程矩形法和双程矩形法,通过对3种方法的相邻点高差中误差和每千米高差全中误差的估算以及实验验证了这3种方法不仅能满足现有的高铁规范要求,而且效率更高,可以成为CPⅢ高程控制网的建网方法;证实双程矩形法更适合用于工期较为宽松的CPⅢ高程网的建网测量,新矩形法和单程矩形法适用于工期紧张的CPⅢ高程网的复测。
Aiming at the problems of low efficiency and uneven precision of elevation point, the paper analyzes two measurement methods of CP Ⅲ elevation control network introduced in the “Specifications of Engineering Survey of High Speed Railways” (TB10601-2009) Based on the characteristics of the Chinese rectangle method and its application in practice, a new rectangular method, a one-way rectangular method and a two-way rectangular method with higher field measurement efficiency are proposed. By comparing the height difference of adjacent points of the three methods, Mid-error and per-kilometer height error, and experimentally verified that these three methods can not only meet the existing high-speed railway specifications, but also have higher efficiency and can be used as a CPIII elevation control network construction method; The rectangular method is more suitable for the construction period measurement of the CP Ⅲ elevation network with a more relaxed construction period. The new rectangular method and the one-way rectangular method are suitable for the re-measurement of the CP Ⅲ elevation network with a long construction period.